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| version 1.1, 2001/09/21 15:44:38 | version 1.2, 2003/01/13 15:50:03 |
|---|---|
| Line 1 | Line 1 |
| /* ltdl.c -- system independent dlopen wrapper | /* ltdl.c -- system independent dlopen wrapper |
| Copyright (C) 1998-1999 Free Software Foundation, Inc. | Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc. |
| Originally by Thomas Tanner <tanner@ffii.org> | Originally by Thomas Tanner <tanner@ffii.org> |
| This file is part of GNU Libtool. | This file is part of GNU Libtool. |
| This library is free software; you can redistribute it and/or | This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public | modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either | License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. | version 2 of the License, or (at your option) any later version. |
| As a special exception to the GNU Library General Public License, | As a special exception to the GNU Lesser General Public License, |
| if you distribute this file as part of a program that uses GNU libtool | if you distribute this file as part of a program or library that |
| to create libraries and programs, you may include it under the same | is built using GNU libtool, you may include it under the same |
| distribution terms that you use for the rest of that program. | distribution terms that you use for the rest of that program. |
| This library is distributed in the hope that it will be useful, | This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Library General Public License for more details. | Lesser General Public License for more details. |
| You should have received a copy of the GNU Library General Public | You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software | License along with this library; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA | 02111-1307 USA |
| */ | */ |
| #define _LTDL_COMPILE_ | #if HAVE_CONFIG_H |
| # include <config.h> | |
| #endif | |
| #include "config.h" | #if HAVE_UNISTD_H |
| # include <unistd.h> | |
| #endif | |
| #if HAVE_STRING_H | #if HAVE_STDIO_H |
| #include <string.h> | # include <stdio.h> |
| #endif | |
| #if HAVE_STDLIB_H | |
| # include <stdlib.h> | |
| #endif | #endif |
| #if HAVE_STRINGS_H | #if HAVE_STRING_H |
| #include <strings.h> | # include <string.h> |
| #else | |
| # if HAVE_STRINGS_H | |
| # include <strings.h> | |
| # endif | |
| #endif | #endif |
| #if HAVE_CTYPE_H | #if HAVE_CTYPE_H |
| #include <ctype.h> | # include <ctype.h> |
| #endif | #endif |
| #if HAVE_MALLOC_H | #if HAVE_MALLOC_H |
| #include <malloc.h> | # include <malloc.h> |
| #endif | #endif |
| #if HAVE_MEMORY_H | #if HAVE_MEMORY_H |
| #include <memory.h> | # include <memory.h> |
| #endif | #endif |
| #if HAVE_STDLIB_H | #if HAVE_ERRNO_H |
| #include <stdlib.h> | # include <errno.h> |
| #endif | #endif |
| #if HAVE_STDIO_H | #if HAVE_DIRENT_H |
| #include <stdio.h> | # include <dirent.h> |
| # define LT_D_NAMLEN(dirent) (strlen((dirent)->d_name)) | |
| #else | |
| # define dirent direct | |
| # define LT_D_NAMLEN(dirent) ((dirent)->d_namlen) | |
| # if HAVE_SYS_NDIR_H | |
| # include <sys/ndir.h> | |
| # endif | |
| # if HAVE_SYS_DIR_H | |
| # include <sys/dir.h> | |
| # endif | |
| # if HAVE_NDIR_H | |
| # include <ndir.h> | |
| # endif | |
| #endif | |
| #if HAVE_ARGZ_H | |
| # include <argz.h> | |
| #endif | |
| #if HAVE_ASSERT_H | |
| # include <assert.h> | |
| #else | |
| # define assert(arg) ((void) 0) | |
| #endif | #endif |
| #include "ltdl.h" | #include "ltdl.h" |
| /* max. filename length */ | #if WITH_DMALLOC |
| #ifndef LTDL_FILENAME_MAX | # include <dmalloc.h> |
| #define LTDL_FILENAME_MAX 1024 | #endif |
| /* --- WINDOWS SUPPORT --- */ | |
| #ifdef DLL_EXPORT | |
| # define LT_GLOBAL_DATA __declspec(dllexport) | |
| #else | |
| # define LT_GLOBAL_DATA | |
| #endif | #endif |
| #undef LTDL_READTEXT_MODE | |
| /* fopen() mode flags for reading a text file */ | /* fopen() mode flags for reading a text file */ |
| #ifdef _WIN32 | #undef LT_READTEXT_MODE |
| #define LTDL_READTEXT_MODE "rt" | #ifdef __WINDOWS__ |
| # define LT_READTEXT_MODE "rt" | |
| #else | #else |
| #define LTDL_READTEXT_MODE "r" | # define LT_READTEXT_MODE "r" |
| #endif | |
| /* --- MANIFEST CONSTANTS --- */ | |
| /* Standard libltdl search path environment variable name */ | |
| #undef LTDL_SEARCHPATH_VAR | |
| #define LTDL_SEARCHPATH_VAR "LTDL_LIBRARY_PATH" | |
| /* Standard libtool archive file extension. */ | |
| #undef LTDL_ARCHIVE_EXT | |
| #define LTDL_ARCHIVE_EXT ".la" | |
| /* max. filename length */ | |
| #ifndef LT_FILENAME_MAX | |
| # define LT_FILENAME_MAX 1024 | |
| #endif | #endif |
| #undef LTDL_SYMBOL_LENGTH | |
| /* This is the maximum symbol size that won't require malloc/free */ | /* This is the maximum symbol size that won't require malloc/free */ |
| #define LTDL_SYMBOL_LENGTH 128 | #undef LT_SYMBOL_LENGTH |
| #define LT_SYMBOL_LENGTH 128 | |
| #undef LTDL_SYMBOL_OVERHEAD | |
| /* This accounts for the _LTX_ separator */ | /* This accounts for the _LTX_ separator */ |
| #define LTDL_SYMBOL_OVERHEAD 5 | #undef LT_SYMBOL_OVERHEAD |
| #define LT_SYMBOL_OVERHEAD 5 | |
| /* --- MEMORY HANDLING --- */ | |
| /* These are the functions used internally. In addition to making | |
| use of the associated function pointers above, they also perform | |
| error handling. */ | |
| static char *lt_estrdup LT_PARAMS((const char *str)); | |
| static lt_ptr lt_emalloc LT_PARAMS((size_t size)); | |
| static lt_ptr lt_erealloc LT_PARAMS((lt_ptr addr, size_t size)); | |
| static lt_ptr rpl_realloc LT_PARAMS((lt_ptr ptr, size_t size)); | |
| /* These are the pointers that can be changed by the caller: */ | |
| LT_GLOBAL_DATA lt_ptr (*lt_dlmalloc) LT_PARAMS((size_t size)) | |
| = (lt_ptr (*) LT_PARAMS((size_t))) malloc; | |
| LT_GLOBAL_DATA lt_ptr (*lt_dlrealloc) LT_PARAMS((lt_ptr ptr, size_t size)) | |
| = (lt_ptr (*) LT_PARAMS((lt_ptr, size_t))) rpl_realloc; | |
| LT_GLOBAL_DATA void (*lt_dlfree) LT_PARAMS((lt_ptr ptr)) | |
| = (void (*) LT_PARAMS((lt_ptr))) free; | |
| /* The following macros reduce the amount of typing needed to cast | |
| assigned memory. */ | |
| #if WITH_DMALLOC | |
| #define LT_DLMALLOC(tp, n) ((tp *) xmalloc ((n) * sizeof(tp))) | |
| #define LT_DLREALLOC(tp, p, n) ((tp *) xrealloc ((p), (n) * sizeof(tp))) | |
| #define LT_DLFREE(p) \ | |
| LT_STMT_START { if (p) (p) = (xfree (p), (lt_ptr) 0); } LT_STMT_END | |
| #define LT_EMALLOC(tp, n) ((tp *) xmalloc ((n) * sizeof(tp))) | |
| #define LT_EREALLOC(tp, p, n) ((tp *) xrealloc ((p), (n) * sizeof(tp))) | |
| #else | |
| #define LT_DLMALLOC(tp, n) ((tp *) lt_dlmalloc ((n) * sizeof(tp))) | |
| #define LT_DLREALLOC(tp, p, n) ((tp *) rpl_realloc ((p), (n) * sizeof(tp))) | |
| #define LT_DLFREE(p) \ | |
| LT_STMT_START { if (p) (p) = (lt_dlfree (p), (lt_ptr) 0); } LT_STMT_END | |
| #define LT_EMALLOC(tp, n) ((tp *) lt_emalloc ((n) * sizeof(tp))) | |
| #define LT_EREALLOC(tp, p, n) ((tp *) lt_erealloc ((p), (n) * sizeof(tp))) | |
| static const char objdir[] = LTDL_OBJDIR; | |
| #ifdef LTDL_SHLIB_EXT | |
| static const char shlib_ext[] = LTDL_SHLIB_EXT; | |
| #endif | #endif |
| static const char unknown_error[] = "unknown error"; | #define LT_DLMEM_REASSIGN(p, q) LT_STMT_START { \ |
| static const char dlopen_not_supported_error[] = "dlopen support not available"; | if ((p) != (q)) { if (p) lt_dlfree (p); (p) = (q); (q) = 0; } \ |
| static const char file_not_found_error[] = "file not found"; | } LT_STMT_END |
| static const char no_symbols_error[] = "no symbols defined"; | |
| static const char cannot_open_error[] = "can't open the module"; | |
| static const char cannot_close_error[] = "can't close the module"; | /* --- REPLACEMENT FUNCTIONS --- */ |
| static const char symbol_error[] = "symbol not found"; | |
| static const char memory_error[] = "not enough memory"; | |
| static const char invalid_handle_error[] = "invalid handle"; | |
| static const char buffer_overflow_error[] = "internal buffer overflow"; | |
| static const char shutdown_error[] = "library already shutdown"; | |
| #ifndef HAVE_PRELOADED_SYMBOLS | |
| /* If libtool won't define it, we'd better do */ | |
| const lt_dlsymlist lt_preloaded_symbols[1] = { { 0, 0 } }; | |
| #endif | |
| static const char *last_error = 0; | |
| lt_ptr_t (*lt_dlmalloc) LTDL_PARAMS((size_t size)) = (lt_ptr_t(*)LTDL_PARAMS((size_t)))malloc; | |
| void (*lt_dlfree) LTDL_PARAMS((lt_ptr_t ptr)) = (void(*)LTDL_PARAMS((lt_ptr_t)))free; | |
| typedef struct lt_dltype_t { | |
| struct lt_dltype_t *next; | |
| const char *sym_prefix; /* prefix for symbols */ | |
| int (*mod_init) LTDL_PARAMS((void)); | |
| int (*mod_exit) LTDL_PARAMS((void)); | |
| int (*lib_open) LTDL_PARAMS((lt_dlhandle handle, const char *filename)); | |
| int (*lib_close) LTDL_PARAMS((lt_dlhandle handle)); | |
| lt_ptr_t (*find_sym) LTDL_PARAMS((lt_dlhandle handle, const char *symbol)); | |
| } lt_dltype_t; | |
| #define LTDL_TYPE_TOP 0 | |
| typedef struct lt_dlhandle_t { | |
| struct lt_dlhandle_t *next; | |
| lt_dltype_t *type; /* dlopening interface */ | |
| char *filename; /* file name */ | |
| char *name; /* module name */ | |
| int usage; /* usage */ | |
| int depcount; /* number of dependencies */ | |
| lt_dlhandle *deplibs; /* dependencies */ | |
| lt_ptr_t handle; /* system handle */ | |
| lt_ptr_t system; /* system specific data */ | |
| } lt_dlhandle_t; | |
| #undef strdup | #undef strdup |
| #define strdup xstrdup | #define strdup rpl_strdup |
| static char *strdup LT_PARAMS((const char *str)); | |
| static inline char * | static char * |
| strdup(str) | strdup(str) |
| const char *str; | const char *str; |
| { | { |
| char *tmp; | char *tmp = NULL; |
| if (!str) | if (str) |
| return 0; | { |
| tmp = (char*) lt_dlmalloc(strlen(str)+1); | tmp = LT_DLMALLOC (char, 1+ strlen (str)); |
| if (tmp) | if (tmp) |
| strcpy(tmp, str); | { |
| return tmp; | strcpy(tmp, str); |
| } | |
| } | |
| return tmp; | |
| } | } |
| #if ! HAVE_STRCHR | |
| # if HAVE_INDEX | #if ! HAVE_STRCMP |
| #undef strcmp | |
| #define strcmp rpl_strcmp | |
| # define strchr index | static int strcmp LT_PARAMS((const char *str1, const char *str2)); |
| static int | |
| strcmp (str1, str2) | |
| const char *str1; | |
| const char *str2; | |
| { | |
| if (str1 == str2) | |
| return 0; | |
| if (str1 == NULL) | |
| return -1; | |
| if (str2 == NULL) | |
| return 1; | |
| # else | for (;*str1 && *str2; ++str1, ++str2) |
| { | |
| if (*str1 != *str2) | |
| break; | |
| } | |
| # define strchr xstrchr | return (int)(*str1 - *str2); |
| } | |
| #endif | |
| #if ! HAVE_STRCHR | |
| static inline const char* | # if HAVE_INDEX |
| # define strchr index | |
| # else | |
| # define strchr rpl_strchr | |
| static const char *strchr LT_PARAMS((const char *str, int ch)); | |
| static const char* | |
| strchr(str, ch) | strchr(str, ch) |
| const char *str; | const char *str; |
| int ch; | int ch; |
| { | { |
| const char *p; | const char *p; |
| for (p = str; *p != (char)ch && *p != '\0'; p++) | for (p = str; *p != (char)ch && *p != LT_EOS_CHAR; ++p) |
| /*NOWORK*/; | /*NOWORK*/; |
| return (*p == (char)ch) ? p : 0; | return (*p == (char)ch) ? p : 0; |
| } | } |
| # endif | # endif |
| #endif /* !HAVE_STRCHR */ | |
| #endif | |
| #if ! HAVE_STRRCHR | #if ! HAVE_STRRCHR |
| # if HAVE_RINDEX | # if HAVE_RINDEX |
| # define strrchr rindex | |
| # else | |
| # define strrchr rpl_strrchr | |
| # define strrchr rindex | static const char *strrchr LT_PARAMS((const char *str, int ch)); |
| # else | static const char* |
| strrchr(str, ch) | |
| const char *str; | |
| int ch; | |
| { | |
| const char *p, *q = NULL; | |
| # define strrchr xstrrchr | for (p = str; *p != LT_EOS_CHAR; ++p) |
| { | |
| if (*p == (char) ch) | |
| { | |
| q = p; | |
| } | |
| } | |
| static inline const char* | return q; |
| strrchr(str, ch) | } |
| const char *str; | |
| int ch; | # endif |
| #endif | |
| /* NOTE: Neither bcopy nor the memcpy implementation below can | |
| reliably handle copying in overlapping areas of memory. Use | |
| memmove (for which there is a fallback implmentation below) | |
| if you need that behaviour. */ | |
| #if ! HAVE_MEMCPY | |
| # if HAVE_BCOPY | |
| # define memcpy(dest, src, size) bcopy (src, dest, size) | |
| # else | |
| # define memcpy rpl_memcpy | |
| static lt_ptr memcpy LT_PARAMS((lt_ptr dest, const lt_ptr src, size_t size)); | |
| static lt_ptr | |
| memcpy (dest, src, size) | |
| lt_ptr dest; | |
| const lt_ptr src; | |
| size_t size; | |
| { | |
| size_t i = 0; | |
| for (i = 0; i < size; ++i) | |
| { | |
| dest[i] = src[i]; | |
| } | |
| return dest; | |
| } | |
| # endif /* !HAVE_BCOPY */ | |
| #endif /* !HAVE_MEMCPY */ | |
| #if ! HAVE_MEMMOVE | |
| # define memmove rpl_memmove | |
| static lt_ptr memmove LT_PARAMS((lt_ptr dest, const lt_ptr src, size_t size)); | |
| static lt_ptr | |
| memmove (dest, src, size) | |
| lt_ptr dest; | |
| const lt_ptr src; | |
| size_t size; | |
| { | { |
| const char *p; | size_t i; |
| for (p = str; *p != '\0'; p++) | if (dest < src) |
| /*NOWORK*/; | for (i = 0; i < size; ++i) |
| { | |
| dest[i] = src[i]; | |
| } | |
| else if (dest > src) | |
| for (i = size -1; i >= 0; --i) | |
| { | |
| dest[i] = src[i]; | |
| } | |
| return dest; | |
| } | |
| #endif /* !HAVE_MEMMOVE */ | |
| while (*p != (char)ch && p >= str) | |
| p--; | |
| return (*p == (char)ch) ? p : 0; | /* According to Alexandre Oliva <oliva@lsd.ic.unicamp.br>, |
| ``realloc is not entirely portable'' | |
| In any case we want to use the allocator supplied by the user without | |
| burdening them with an lt_dlrealloc function pointer to maintain. | |
| Instead implement our own version (with known boundary conditions) | |
| using lt_dlmalloc and lt_dlfree. */ | |
| #undef realloc | |
| #define realloc rpl_realloc | |
| static lt_ptr | |
| realloc (ptr, size) | |
| lt_ptr ptr; | |
| size_t size; | |
| { | |
| if (size == 0) | |
| { | |
| /* For zero or less bytes, free the original memory */ | |
| if (ptr != NULL) | |
| { | |
| lt_dlfree (ptr); | |
| } | |
| return (lt_ptr) 0; | |
| } | |
| else if (ptr == NULL) | |
| { | |
| /* Allow reallocation of a NULL pointer. */ | |
| return lt_dlmalloc (size); | |
| } | |
| else | |
| { | |
| /* Allocate a new block, copy and free the old block. */ | |
| lt_ptr mem = lt_dlmalloc (size); | |
| if (mem) | |
| { | |
| memcpy (mem, ptr, size); | |
| lt_dlfree (ptr); | |
| } | |
| /* Note that the contents of PTR are not damaged if there is | |
| insufficient memory to realloc. */ | |
| return mem; | |
| } | |
| } | } |
| # endif | |
| #if ! HAVE_ARGZ_APPEND | |
| # define argz_append rpl_argz_append | |
| static error_t argz_append LT_PARAMS((char **pargz, size_t *pargz_len, | |
| const char *buf, size_t buf_len)); | |
| static error_t | |
| argz_append (pargz, pargz_len, buf, buf_len) | |
| char **pargz; | |
| size_t *pargz_len; | |
| const char *buf; | |
| size_t buf_len; | |
| { | |
| size_t argz_len; | |
| char *argz; | |
| assert (pargz); | |
| assert (pargz_len); | |
| assert ((*pargz && *pargz_len) || (!*pargz && !*pargz_len)); | |
| /* If nothing needs to be appended, no more work is required. */ | |
| if (buf_len == 0) | |
| return 0; | |
| /* Ensure there is enough room to append BUF_LEN. */ | |
| argz_len = *pargz_len + buf_len; | |
| argz = LT_DLREALLOC (char, *pargz, argz_len); | |
| if (!argz) | |
| return ENOMEM; | |
| /* Copy characters from BUF after terminating '\0' in ARGZ. */ | |
| memcpy (argz + *pargz_len, buf, buf_len); | |
| /* Assign new values. */ | |
| *pargz = argz; | |
| *pargz_len = argz_len; | |
| return 0; | |
| } | |
| #endif /* !HAVE_ARGZ_APPEND */ | |
| #if ! HAVE_ARGZ_CREATE_SEP | |
| # define argz_create_sep rpl_argz_create_sep | |
| static error_t argz_create_sep LT_PARAMS((const char *str, int delim, | |
| char **pargz, size_t *pargz_len)); | |
| static error_t | |
| argz_create_sep (str, delim, pargz, pargz_len) | |
| const char *str; | |
| int delim; | |
| char **pargz; | |
| size_t *pargz_len; | |
| { | |
| size_t argz_len; | |
| char *argz = NULL; | |
| assert (str); | |
| assert (pargz); | |
| assert (pargz_len); | |
| /* Make a copy of STR, but replacing each occurence of | |
| DELIM with '\0'. */ | |
| argz_len = 1+ LT_STRLEN (str); | |
| if (argz_len) | |
| { | |
| const char *p; | |
| char *q; | |
| argz = LT_DLMALLOC (char, argz_len); | |
| if (!argz) | |
| return ENOMEM; | |
| for (p = str, q = argz; *p != LT_EOS_CHAR; ++p) | |
| { | |
| if (*p == delim) | |
| { | |
| /* Ignore leading delimiters, and fold consecutive | |
| delimiters in STR into a single '\0' in ARGZ. */ | |
| if ((q > argz) && (q[-1] != LT_EOS_CHAR)) | |
| *q++ = LT_EOS_CHAR; | |
| else | |
| --argz_len; | |
| } | |
| else | |
| *q++ = *p; | |
| } | |
| /* Copy terminating LT_EOS_CHAR. */ | |
| *q = *p; | |
| } | |
| /* If ARGZ_LEN has shrunk to nothing, release ARGZ's memory. */ | |
| if (!argz_len) | |
| LT_DLFREE (argz); | |
| /* Assign new values. */ | |
| *pargz = argz; | |
| *pargz_len = argz_len; | |
| return 0; | |
| } | |
| #endif /* !HAVE_ARGZ_CREATE_SEP */ | |
| #if ! HAVE_ARGZ_INSERT | |
| # define argz_insert rpl_argz_insert | |
| static error_t argz_insert LT_PARAMS((char **pargz, size_t *pargz_len, | |
| char *before, const char *entry)); | |
| static error_t | |
| argz_insert (pargz, pargz_len, before, entry) | |
| char **pargz; | |
| size_t *pargz_len; | |
| char *before; | |
| const char *entry; | |
| { | |
| assert (pargz); | |
| assert (pargz_len); | |
| assert (entry && *entry); | |
| /* No BEFORE address indicates ENTRY should be inserted after the | |
| current last element. */ | |
| if (!before) | |
| return argz_append (pargz, pargz_len, entry, 1+ LT_STRLEN (entry)); | |
| /* This probably indicates a programmer error, but to preserve | |
| semantics, scan back to the start of an entry if BEFORE points | |
| into the middle of it. */ | |
| while ((before >= *pargz) && (before[-1] != LT_EOS_CHAR)) | |
| --before; | |
| { | |
| size_t entry_len = 1+ LT_STRLEN (entry); | |
| size_t argz_len = *pargz_len + entry_len; | |
| size_t offset = before - *pargz; | |
| char *argz = LT_DLREALLOC (char, *pargz, argz_len); | |
| if (!argz) | |
| return ENOMEM; | |
| /* Make BEFORE point to the equivalent offset in ARGZ that it | |
| used to have in *PARGZ incase realloc() moved the block. */ | |
| before = argz + offset; | |
| /* Move the ARGZ entries starting at BEFORE up into the new | |
| space at the end -- making room to copy ENTRY into the | |
| resulting gap. */ | |
| memmove (before + entry_len, before, *pargz_len - offset); | |
| memcpy (before, entry, entry_len); | |
| /* Assign new values. */ | |
| *pargz = argz; | |
| *pargz_len = argz_len; | |
| } | |
| return 0; | |
| } | |
| #endif /* !HAVE_ARGZ_INSERT */ | |
| #if ! HAVE_ARGZ_NEXT | |
| # define argz_next rpl_argz_next | |
| static char *argz_next LT_PARAMS((char *argz, size_t argz_len, | |
| const char *entry)); | |
| static char * | |
| argz_next (argz, argz_len, entry) | |
| char *argz; | |
| size_t argz_len; | |
| const char *entry; | |
| { | |
| assert ((argz && argz_len) || (!argz && !argz_len)); | |
| if (entry) | |
| { | |
| /* Either ARGZ/ARGZ_LEN is empty, or ENTRY points into an address | |
| within the ARGZ vector. */ | |
| assert ((!argz && !argz_len) | |
| || ((argz <= entry) && (entry < (argz + argz_len)))); | |
| /* Move to the char immediately after the terminating | |
| '\0' of ENTRY. */ | |
| entry = 1+ strchr (entry, LT_EOS_CHAR); | |
| /* Return either the new ENTRY, or else NULL if ARGZ is | |
| exhausted. */ | |
| return (entry >= argz + argz_len) ? 0 : (char *) entry; | |
| } | |
| else | |
| { | |
| /* This should probably be flagged as a programmer error, | |
| since starting an argz_next loop with the iterator set | |
| to ARGZ is safer. To preserve semantics, handle the NULL | |
| case by returning the start of ARGZ (if any). */ | |
| if (argz_len > 0) | |
| return argz; | |
| else | |
| return 0; | |
| } | |
| } | |
| #endif /* !HAVE_ARGZ_NEXT */ | |
| #if ! HAVE_ARGZ_STRINGIFY | |
| # define argz_stringify rpl_argz_stringify | |
| static void argz_stringify LT_PARAMS((char *argz, size_t argz_len, | |
| int sep)); | |
| static void | |
| argz_stringify (argz, argz_len, sep) | |
| char *argz; | |
| size_t argz_len; | |
| int sep; | |
| { | |
| assert ((argz && argz_len) || (!argz && !argz_len)); | |
| if (sep) | |
| { | |
| --argz_len; /* don't stringify the terminating EOS */ | |
| while (--argz_len > 0) | |
| { | |
| if (argz[argz_len] == LT_EOS_CHAR) | |
| argz[argz_len] = sep; | |
| } | |
| } | |
| } | |
| #endif /* !HAVE_ARGZ_STRINGIFY */ | |
| /* --- TYPE DEFINITIONS -- */ | |
| /* This type is used for the array of caller data sets in each handler. */ | |
| typedef struct { | |
| lt_dlcaller_id key; | |
| lt_ptr data; | |
| } lt_caller_data; | |
| /* --- OPAQUE STRUCTURES DECLARED IN LTDL.H --- */ | |
| /* Extract the diagnostic strings from the error table macro in the same | |
| order as the enumerated indices in ltdl.h. */ | |
| static const char *lt_dlerror_strings[] = | |
| { | |
| #define LT_ERROR(name, diagnostic) (diagnostic), | |
| lt_dlerror_table | |
| #undef LT_ERROR | |
| 0 | |
| }; | |
| /* This structure is used for the list of registered loaders. */ | |
| struct lt_dlloader { | |
| struct lt_dlloader *next; | |
| const char *loader_name; /* identifying name for each loader */ | |
| const char *sym_prefix; /* prefix for symbols */ | |
| lt_module_open *module_open; | |
| lt_module_close *module_close; | |
| lt_find_sym *find_sym; | |
| lt_dlloader_exit *dlloader_exit; | |
| lt_user_data dlloader_data; | |
| }; | |
| struct lt_dlhandle_struct { | |
| struct lt_dlhandle_struct *next; | |
| lt_dlloader *loader; /* dlopening interface */ | |
| lt_dlinfo info; | |
| int depcount; /* number of dependencies */ | |
| lt_dlhandle *deplibs; /* dependencies */ | |
| lt_module module; /* system module handle */ | |
| lt_ptr system; /* system specific data */ | |
| lt_caller_data *caller_data; /* per caller associated data */ | |
| int flags; /* various boolean stats */ | |
| }; | |
| /* Various boolean flags can be stored in the flags field of an | |
| lt_dlhandle_struct... */ | |
| #define LT_DLGET_FLAG(handle, flag) (((handle)->flags & (flag)) == (flag)) | |
| #define LT_DLSET_FLAG(handle, flag) ((handle)->flags |= (flag)) | |
| #define LT_DLRESIDENT_FLAG (0x01 << 0) | |
| /* ...add more flags here... */ | |
| #define LT_DLIS_RESIDENT(handle) LT_DLGET_FLAG(handle, LT_DLRESIDENT_FLAG) | |
| #define LT_DLSTRERROR(name) lt_dlerror_strings[LT_CONC(LT_ERROR_,name)] | |
| static const char objdir[] = LTDL_OBJDIR; | |
| static const char archive_ext[] = LTDL_ARCHIVE_EXT; | |
| #ifdef LTDL_SHLIB_EXT | |
| static const char shlib_ext[] = LTDL_SHLIB_EXT; | |
| #endif | |
| #ifdef LTDL_SYSSEARCHPATH | |
| static const char sys_search_path[] = LTDL_SYSSEARCHPATH; | |
| #endif | #endif |
| #if HAVE_LIBDL | |
| /* --- MUTEX LOCKING --- */ | |
| /* Macros to make it easier to run the lock functions only if they have | |
| been registered. The reason for the complicated lock macro is to | |
| ensure that the stored error message from the last error is not | |
| accidentally erased if the current function doesn't generate an | |
| error of its own. */ | |
| #define LT_DLMUTEX_LOCK() LT_STMT_START { \ | |
| if (lt_dlmutex_lock_func) (*lt_dlmutex_lock_func)(); \ | |
| } LT_STMT_END | |
| #define LT_DLMUTEX_UNLOCK() LT_STMT_START { \ | |
| if (lt_dlmutex_unlock_func) (*lt_dlmutex_unlock_func)();\ | |
| } LT_STMT_END | |
| #define LT_DLMUTEX_SETERROR(errormsg) LT_STMT_START { \ | |
| if (lt_dlmutex_seterror_func) \ | |
| (*lt_dlmutex_seterror_func) (errormsg); \ | |
| else lt_dllast_error = (errormsg); } LT_STMT_END | |
| #define LT_DLMUTEX_GETERROR(errormsg) LT_STMT_START { \ | |
| if (lt_dlmutex_seterror_func) \ | |
| (errormsg) = (*lt_dlmutex_geterror_func) (); \ | |
| else (errormsg) = lt_dllast_error; } LT_STMT_END | |
| /* The mutex functions stored here are global, and are necessarily the | |
| same for all threads that wish to share access to libltdl. */ | |
| static lt_dlmutex_lock *lt_dlmutex_lock_func = NULL; | |
| static lt_dlmutex_unlock *lt_dlmutex_unlock_func = NULL; | |
| static lt_dlmutex_seterror *lt_dlmutex_seterror_func = NULL; | |
| static lt_dlmutex_geterror *lt_dlmutex_geterror_func = NULL; | |
| static const char *lt_dllast_error = NULL; | |
| /* Either set or reset the mutex functions. Either all the arguments must | |
| be valid functions, or else all can be NULL to turn off locking entirely. | |
| The registered functions should be manipulating a static global lock | |
| from the lock() and unlock() callbacks, which needs to be reentrant. */ | |
| int | |
| lt_dlmutex_register (lock, unlock, seterror, geterror) | |
| lt_dlmutex_lock *lock; | |
| lt_dlmutex_unlock *unlock; | |
| lt_dlmutex_seterror *seterror; | |
| lt_dlmutex_geterror *geterror; | |
| { | |
| lt_dlmutex_unlock *old_unlock = unlock; | |
| int errors = 0; | |
| /* Lock using the old lock() callback, if any. */ | |
| LT_DLMUTEX_LOCK (); | |
| if ((lock && unlock && seterror && geterror) | |
| || !(lock || unlock || seterror || geterror)) | |
| { | |
| lt_dlmutex_lock_func = lock; | |
| lt_dlmutex_unlock_func = unlock; | |
| lt_dlmutex_geterror_func = geterror; | |
| } | |
| else | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_MUTEX_ARGS)); | |
| ++errors; | |
| } | |
| /* Use the old unlock() callback we saved earlier, if any. Otherwise | |
| record any errors using internal storage. */ | |
| if (old_unlock) | |
| (*old_unlock) (); | |
| /* Return the number of errors encountered during the execution of | |
| this function. */ | |
| return errors; | |
| } | |
| /* --- ERROR HANDLING --- */ | |
| static const char **user_error_strings = NULL; | |
| static int errorcount = LT_ERROR_MAX; | |
| int | |
| lt_dladderror (diagnostic) | |
| const char *diagnostic; | |
| { | |
| int errindex = 0; | |
| int result = -1; | |
| const char **temp = NULL; | |
| assert (diagnostic); | |
| LT_DLMUTEX_LOCK (); | |
| errindex = errorcount - LT_ERROR_MAX; | |
| temp = LT_EREALLOC (const char *, user_error_strings, 1 + errindex); | |
| if (temp) | |
| { | |
| user_error_strings = temp; | |
| user_error_strings[errindex] = diagnostic; | |
| result = errorcount++; | |
| } | |
| LT_DLMUTEX_UNLOCK (); | |
| return result; | |
| } | |
| int | |
| lt_dlseterror (errindex) | |
| int errindex; | |
| { | |
| int errors = 0; | |
| LT_DLMUTEX_LOCK (); | |
| if (errindex >= errorcount || errindex < 0) | |
| { | |
| /* Ack! Error setting the error message! */ | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_ERRORCODE)); | |
| ++errors; | |
| } | |
| else if (errindex < LT_ERROR_MAX) | |
| { | |
| /* No error setting the error message! */ | |
| LT_DLMUTEX_SETERROR (lt_dlerror_strings[errindex]); | |
| } | |
| else | |
| { | |
| /* No error setting the error message! */ | |
| LT_DLMUTEX_SETERROR (user_error_strings[errindex - LT_ERROR_MAX]); | |
| } | |
| LT_DLMUTEX_UNLOCK (); | |
| return errors; | |
| } | |
| static lt_ptr | |
| lt_emalloc (size) | |
| size_t size; | |
| { | |
| lt_ptr mem = lt_dlmalloc (size); | |
| if (size && !mem) | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); | |
| return mem; | |
| } | |
| static lt_ptr | |
| lt_erealloc (addr, size) | |
| lt_ptr addr; | |
| size_t size; | |
| { | |
| lt_ptr mem = realloc (addr, size); | |
| if (size && !mem) | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); | |
| return mem; | |
| } | |
| static char * | |
| lt_estrdup (str) | |
| const char *str; | |
| { | |
| char *copy = strdup (str); | |
| if (LT_STRLEN (str) && !copy) | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); | |
| return copy; | |
| } | |
| /* --- DLOPEN() INTERFACE LOADER --- */ | |
| /* The Cygwin dlopen implementation prints a spurious error message to | |
| stderr if its call to LoadLibrary() fails for any reason. We can | |
| mitigate this by not using the Cygwin implementation, and falling | |
| back to our own LoadLibrary() wrapper. */ | |
| #if HAVE_LIBDL && !defined(__CYGWIN__) | |
| /* dynamic linking with dlopen/dlsym */ | /* dynamic linking with dlopen/dlsym */ |
| #if HAVE_DLFCN_H | #if HAVE_DLFCN_H |
| # include <dlfcn.h> | # include <dlfcn.h> |
| #endif | |
| #if HAVE_SYS_DL_H | |
| # include <sys/dl.h> | |
| #endif | #endif |
| #ifdef RTLD_GLOBAL | #ifdef RTLD_GLOBAL |
| # define LTDL_GLOBAL RTLD_GLOBAL | # define LT_GLOBAL RTLD_GLOBAL |
| #else | #else |
| # ifdef DL_GLOBAL | # ifdef DL_GLOBAL |
| # define LTDL_GLOBAL DL_GLOBAL | # define LT_GLOBAL DL_GLOBAL |
| # else | # endif |
| # define LTDL_GLOBAL 0 | #endif /* !RTLD_GLOBAL */ |
| # endif | #ifndef LT_GLOBAL |
| #endif | # define LT_GLOBAL 0 |
| #endif /* !LT_GLOBAL */ | |
| /* We may have to define LTDL_LAZY_OR_NOW in the command line if we | /* We may have to define LT_LAZY_OR_NOW in the command line if we |
| find out it does not work in some platform. */ | find out it does not work in some platform. */ |
| #ifndef LTDL_LAZY_OR_NOW | #ifndef LT_LAZY_OR_NOW |
| # ifdef RTLD_LAZY | # ifdef RTLD_LAZY |
| # define LTDL_LAZY_OR_NOW RTLD_LAZY | # define LT_LAZY_OR_NOW RTLD_LAZY |
| # else | # else |
| # ifdef DL_LAZY | # ifdef DL_LAZY |
| # define LTDL_LAZY_OR_NOW DL_LAZY | # define LT_LAZY_OR_NOW DL_LAZY |
| # endif | |
| # endif /* !RTLD_LAZY */ | |
| #endif | |
| #ifndef LT_LAZY_OR_NOW | |
| # ifdef RTLD_NOW | |
| # define LT_LAZY_OR_NOW RTLD_NOW | |
| # else | # else |
| # ifdef RTLD_NOW | |
| # define LTDL_LAZY_OR_NOW RTLD_NOW | |
| # else | |
| # ifdef DL_NOW | # ifdef DL_NOW |
| # define LTDL_LAZY_OR_NOW DL_NOW | # define LT_LAZY_OR_NOW DL_NOW |
| # else | |
| # define LTDL_LAZY_OR_NOW 0 | |
| # endif | # endif |
| # endif | # endif /* !RTLD_NOW */ |
| # endif | |
| # endif | |
| #endif | #endif |
| #ifndef LT_LAZY_OR_NOW | |
| # define LT_LAZY_OR_NOW 0 | |
| #endif /* !LT_LAZY_OR_NOW */ | |
| static int | #if HAVE_DLERROR |
| sys_dl_init LTDL_PARAMS((void)) | # define DLERROR(arg) dlerror () |
| { | #else |
| return 0; | # define DLERROR(arg) LT_DLSTRERROR (arg) |
| } | #endif |
| static int | static lt_module |
| sys_dl_exit LTDL_PARAMS((void)) | sys_dl_open (loader_data, filename) |
| lt_user_data loader_data; | |
| const char *filename; | |
| { | { |
| return 0; | lt_module module = dlopen (filename, LT_GLOBAL | LT_LAZY_OR_NOW); |
| if (!module) | |
| { | |
| LT_DLMUTEX_SETERROR (DLERROR (CANNOT_OPEN)); | |
| } | |
| return module; | |
| } | } |
| static int | static int |
| sys_dl_open (handle, filename) | sys_dl_close (loader_data, module) |
| lt_dlhandle handle; | lt_user_data loader_data; |
| const char *filename; | lt_module module; |
| { | { |
| handle->handle = dlopen(filename, LTDL_GLOBAL | LTDL_LAZY_OR_NOW); | int errors = 0; |
| if (!handle->handle) { | |
| #if HAVE_DLERROR | if (dlclose (module) != 0) |
| last_error = dlerror(); | { |
| #else | LT_DLMUTEX_SETERROR (DLERROR (CANNOT_CLOSE)); |
| last_error = cannot_open_error; | ++errors; |
| #endif | } |
| return 1; | |
| } | return errors; |
| return 0; | |
| } | } |
| static int | static lt_ptr |
| sys_dl_close (handle) | sys_dl_sym (loader_data, module, symbol) |
| lt_dlhandle handle; | lt_user_data loader_data; |
| lt_module module; | |
| const char *symbol; | |
| { | { |
| if (dlclose(handle->handle) != 0) { | lt_ptr address = dlsym (module, symbol); |
| #if HAVE_DLERROR | |
| last_error = dlerror(); | |
| #else | |
| last_error = cannot_close_error; | |
| #endif | |
| return 1; | |
| } | |
| return 0; | |
| } | |
| static lt_ptr_t | if (!address) |
| sys_dl_sym (handle, symbol) | { |
| lt_dlhandle handle; | LT_DLMUTEX_SETERROR (DLERROR (SYMBOL_NOT_FOUND)); |
| const char *symbol; | } |
| { | |
| lt_ptr_t address = dlsym(handle->handle, symbol); | return address; |
| if (!address) | |
| #if HAVE_DLERROR | |
| last_error = dlerror(); | |
| #else | |
| last_error = symbol_error; | |
| #endif | |
| return address; | |
| } | } |
| static | static struct lt_user_dlloader sys_dl = |
| lt_dltype_t | { |
| #ifdef NEED_USCORE | # ifdef NEED_USCORE |
| sys_dl = { LTDL_TYPE_TOP, "_", sys_dl_init, sys_dl_exit, | "_", |
| sys_dl_open, sys_dl_close, sys_dl_sym }; | # else |
| #else | 0, |
| sys_dl = { LTDL_TYPE_TOP, 0, sys_dl_init, sys_dl_exit, | # endif |
| sys_dl_open, sys_dl_close, sys_dl_sym }; | sys_dl_open, sys_dl_close, sys_dl_sym, 0, 0 }; |
| #endif | |
| #undef LTDL_TYPE_TOP | |
| #define LTDL_TYPE_TOP &sys_dl | |
| #endif | #endif /* HAVE_LIBDL */ |
| /* --- SHL_LOAD() INTERFACE LOADER --- */ | |
| #if HAVE_SHL_LOAD | #if HAVE_SHL_LOAD |
| /* dynamic linking with shl_load (HP-UX) (comments from gmodule) */ | /* dynamic linking with shl_load (HP-UX) (comments from gmodule) */ |
| #ifdef HAVE_DL_H | #ifdef HAVE_DL_H |
| #include <dl.h> | # include <dl.h> |
| #endif | #endif |
| /* some flags are missing on some systems, so we provide | /* some flags are missing on some systems, so we provide |
| Line 335 sys_dl = { LTDL_TYPE_TOP, 0, sys_dl_init | Line 1042 sys_dl = { LTDL_TYPE_TOP, 0, sys_dl_init |
| * BIND_DEFERRED - Delay code symbol resolution until actual reference. | * BIND_DEFERRED - Delay code symbol resolution until actual reference. |
| * | * |
| * Optionally: | * Optionally: |
| * BIND_FIRST - Place the library at the head of the symbol search order. | * BIND_FIRST - Place the library at the head of the symbol search |
| * BIND_NONFATAL - The default BIND_IMMEDIATE behavior is to treat all unsatisfied | * order. |
| * symbols as fatal. This flag allows binding of unsatisfied code | * BIND_NONFATAL - The default BIND_IMMEDIATE behavior is to treat all |
| * symbols to be deferred until use. | * unsatisfied symbols as fatal. This flag allows |
| * [Perl: For certain libraries, like DCE, deferred binding often | * binding of unsatisfied code symbols to be deferred |
| * causes run time problems. Adding BIND_NONFATAL to BIND_IMMEDIATE | * until use. |
| * still allows unresolved references in situations like this.] | * [Perl: For certain libraries, like DCE, deferred |
| * BIND_NOSTART - Do not call the initializer for the shared library when the | * binding often causes run time problems. Adding |
| * library is loaded, nor on a future call to shl_unload(). | * BIND_NONFATAL to BIND_IMMEDIATE still allows |
| * BIND_VERBOSE - Print verbose messages concerning possible unsatisfied symbols. | * unresolved references in situations like this.] |
| * BIND_NOSTART - Do not call the initializer for the shared library | |
| * when the library is loaded, nor on a future call to | |
| * shl_unload(). | |
| * BIND_VERBOSE - Print verbose messages concerning possible | |
| * unsatisfied symbols. | |
| * | * |
| * hp9000s700/hp9000s800: | * hp9000s700/hp9000s800: |
| * BIND_RESTRICTED - Restrict symbols visible by the library to those present at | * BIND_RESTRICTED - Restrict symbols visible by the library to those |
| * library load time. | * present at library load time. |
| * DYNAMIC_PATH - Allow the loader to dynamically search for the library specified | * DYNAMIC_PATH - Allow the loader to dynamically search for the |
| * by the path argument. | * library specified by the path argument. |
| */ | */ |
| #ifndef DYNAMIC_PATH | #ifndef DYNAMIC_PATH |
| #define DYNAMIC_PATH 0 | # define DYNAMIC_PATH 0 |
| #endif /* DYNAMIC_PATH */ | #endif |
| #ifndef BIND_RESTRICTED | #ifndef BIND_RESTRICTED |
| #define BIND_RESTRICTED 0 | # define BIND_RESTRICTED 0 |
| #endif /* BIND_RESTRICTED */ | #endif |
| #define LTDL_BIND_FLAGS (BIND_IMMEDIATE | BIND_NONFATAL | DYNAMIC_PATH) | #define LT_BIND_FLAGS (BIND_IMMEDIATE | BIND_NONFATAL | DYNAMIC_PATH) |
| static int | static lt_module |
| sys_shl_init LTDL_PARAMS((void)) | sys_shl_open (loader_data, filename) |
| lt_user_data loader_data; | |
| const char *filename; | |
| { | { |
| return 0; | static shl_t self = (shl_t) 0; |
| lt_module module = shl_load (filename, LT_BIND_FLAGS, 0L); | |
| /* Since searching for a symbol against a NULL module handle will also | |
| look in everything else that was already loaded and exported with | |
| the -E compiler flag, we always cache a handle saved before any | |
| modules are loaded. */ | |
| if (!self) | |
| { | |
| lt_ptr address; | |
| shl_findsym (&self, "main", TYPE_UNDEFINED, &address); | |
| } | |
| if (!filename) | |
| { | |
| module = self; | |
| } | |
| else | |
| { | |
| module = shl_load (filename, LT_BIND_FLAGS, 0L); | |
| if (!module) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); | |
| } | |
| } | |
| return module; | |
| } | } |
| static int | static int |
| sys_shl_exit LTDL_PARAMS((void)) | sys_shl_close (loader_data, module) |
| lt_user_data loader_data; | |
| lt_module module; | |
| { | { |
| return 0; | int errors = 0; |
| if (module && (shl_unload ((shl_t) (module)) != 0)) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); | |
| ++errors; | |
| } | |
| return errors; | |
| } | } |
| static int | static lt_ptr |
| sys_shl_open (handle, filename) | sys_shl_sym (loader_data, module, symbol) |
| lt_dlhandle handle; | lt_user_data loader_data; |
| const char *filename; | lt_module module; |
| { | const char *symbol; |
| handle->handle = shl_load(filename, LTDL_BIND_FLAGS, 0L); | { |
| if (!handle->handle) { | lt_ptr address = NULL; |
| last_error = cannot_open_error; | |
| return 1; | /* sys_shl_open should never return a NULL module handle */ |
| if (module == (lt_module) 0) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); | |
| } | |
| else if (!shl_findsym((shl_t*) &module, symbol, TYPE_UNDEFINED, &address)) | |
| { | |
| if (!address) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); | |
| } | } |
| return 0; | } |
| return address; | |
| } | |
| static struct lt_user_dlloader sys_shl = { | |
| 0, sys_shl_open, sys_shl_close, sys_shl_sym, 0, 0 | |
| }; | |
| #endif /* HAVE_SHL_LOAD */ | |
| /* --- LOADLIBRARY() INTERFACE LOADER --- */ | |
| #ifdef __WINDOWS__ | |
| /* dynamic linking for Win32 */ | |
| #include <windows.h> | |
| /* Forward declaration; required to implement handle search below. */ | |
| static lt_dlhandle handles; | |
| static lt_module | |
| sys_wll_open (loader_data, filename) | |
| lt_user_data loader_data; | |
| const char *filename; | |
| { | |
| lt_dlhandle cur; | |
| lt_module module = NULL; | |
| const char *errormsg = NULL; | |
| char *searchname = NULL; | |
| char *ext; | |
| char self_name_buf[MAX_PATH]; | |
| if (!filename) | |
| { | |
| /* Get the name of main module */ | |
| *self_name_buf = '\0'; | |
| GetModuleFileName (NULL, self_name_buf, sizeof (self_name_buf)); | |
| filename = ext = self_name_buf; | |
| } | |
| else | |
| { | |
| ext = strrchr (filename, '.'); | |
| } | |
| if (ext) | |
| { | |
| /* FILENAME already has an extension. */ | |
| searchname = lt_estrdup (filename); | |
| } | |
| else | |
| { | |
| /* Append a `.' to stop Windows from adding an | |
| implicit `.dll' extension. */ | |
| searchname = LT_EMALLOC (char, 2+ LT_STRLEN (filename)); | |
| if (searchname) | |
| sprintf (searchname, "%s.", filename); | |
| } | |
| if (!searchname) | |
| return 0; | |
| #if __CYGWIN__ | |
| { | |
| char wpath[MAX_PATH]; | |
| cygwin_conv_to_full_win32_path(searchname, wpath); | |
| module = LoadLibrary(wpath); | |
| } | |
| #else | |
| module = LoadLibrary (searchname); | |
| #endif | |
| LT_DLFREE (searchname); | |
| /* libltdl expects this function to fail if it is unable | |
| to physically load the library. Sadly, LoadLibrary | |
| will search the loaded libraries for a match and return | |
| one of them if the path search load fails. | |
| We check whether LoadLibrary is returning a handle to | |
| an already loaded module, and simulate failure if we | |
| find one. */ | |
| LT_DLMUTEX_LOCK (); | |
| cur = handles; | |
| while (cur) | |
| { | |
| if (!cur->module) | |
| { | |
| cur = NULL; | |
| break; | |
| } | |
| if (cur->module == module) | |
| { | |
| break; | |
| } | |
| cur = cur->next; | |
| } | |
| LT_DLMUTEX_UNLOCK (); | |
| if (cur || !module) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); | |
| module = NULL; | |
| } | |
| return module; | |
| } | } |
| static int | static int |
| sys_shl_close (handle) | sys_wll_close (loader_data, module) |
| lt_dlhandle handle; | lt_user_data loader_data; |
| lt_module module; | |
| { | { |
| if (shl_unload((shl_t) (handle->handle)) != 0) { | int errors = 0; |
| last_error = cannot_close_error; | |
| return 1; | if (FreeLibrary(module) == 0) |
| } | { |
| return 0; | LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); |
| ++errors; | |
| } | |
| return errors; | |
| } | } |
| static lt_ptr_t | static lt_ptr |
| sys_shl_sym (handle, symbol) | sys_wll_sym (loader_data, module, symbol) |
| lt_dlhandle handle; | lt_user_data loader_data; |
| const char *symbol; | lt_module module; |
| { | const char *symbol; |
| lt_ptr_t address; | { |
| lt_ptr address = GetProcAddress (module, symbol); | |
| if (handle->handle && shl_findsym((shl_t*) &(handle->handle), | |
| symbol, TYPE_UNDEFINED, &address) == 0) | if (!address) |
| if (address) | { |
| return address; | LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); |
| last_error = symbol_error; | } |
| return 0; | |
| return address; | |
| } | } |
| static | static struct lt_user_dlloader sys_wll = { |
| lt_dltype_t | 0, sys_wll_open, sys_wll_close, sys_wll_sym, 0, 0 |
| sys_shl = { LTDL_TYPE_TOP, 0, sys_shl_init, sys_shl_exit, | }; |
| sys_shl_open, sys_shl_close, sys_shl_sym }; | |
| #undef LTDL_TYPE_TOP | #endif /* __WINDOWS__ */ |
| #define LTDL_TYPE_TOP &sys_shl | |
| /* --- LOAD_ADD_ON() INTERFACE LOADER --- */ | |
| #ifdef __BEOS__ | |
| /* dynamic linking for BeOS */ | |
| #include <kernel/image.h> | |
| static lt_module | |
| sys_bedl_open (loader_data, filename) | |
| lt_user_data loader_data; | |
| const char *filename; | |
| { | |
| image_id image = 0; | |
| if (filename) | |
| { | |
| image = load_add_on (filename); | |
| } | |
| else | |
| { | |
| image_info info; | |
| int32 cookie = 0; | |
| if (get_next_image_info (0, &cookie, &info) == B_OK) | |
| image = load_add_on (info.name); | |
| } | |
| if (image <= 0) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); | |
| image = 0; | |
| } | |
| return (lt_module) image; | |
| } | |
| static int | |
| sys_bedl_close (loader_data, module) | |
| lt_user_data loader_data; | |
| lt_module module; | |
| { | |
| int errors = 0; | |
| if (unload_add_on ((image_id) module) != B_OK) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); | |
| ++errors; | |
| } | |
| return errors; | |
| } | |
| static lt_ptr | |
| sys_bedl_sym (loader_data, module, symbol) | |
| lt_user_data loader_data; | |
| lt_module module; | |
| const char *symbol; | |
| { | |
| lt_ptr address = NULL; | |
| image_id image = (image_id) module; | |
| if (get_image_symbol (image, symbol, B_SYMBOL_TYPE_ANY, address) != B_OK) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); | |
| address = NULL; | |
| } | |
| return address; | |
| } | |
| static struct lt_user_dlloader sys_bedl = { | |
| 0, sys_bedl_open, sys_bedl_close, sys_bedl_sym, 0, 0 | |
| }; | |
| #endif /* __BEOS__ */ | |
| /* --- DLD_LINK() INTERFACE LOADER --- */ | |
| #endif | |
| #if HAVE_DLD | #if HAVE_DLD |
| Line 431 sys_shl = { LTDL_TYPE_TOP, 0, sys_shl_in | Line 1388 sys_shl = { LTDL_TYPE_TOP, 0, sys_shl_in |
| #include <dld.h> | #include <dld.h> |
| #endif | #endif |
| static int | static lt_module |
| sys_dld_init LTDL_PARAMS((void)) | sys_dld_open (loader_data, filename) |
| lt_user_data loader_data; | |
| const char *filename; | |
| { | { |
| return 0; | lt_module module = strdup (filename); |
| } | |
| static int | if (dld_link (filename) != 0) |
| sys_dld_exit LTDL_PARAMS((void)) | { |
| { | LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_OPEN)); |
| return 0; | LT_DLFREE (module); |
| } | module = NULL; |
| } | |
| static int | return module; |
| sys_dld_open (handle, filename) | |
| lt_dlhandle handle; | |
| const char *filename; | |
| { | |
| handle->handle = strdup(filename); | |
| if (!handle->handle) { | |
| last_error = memory_error; | |
| return 1; | |
| } | |
| if (dld_link(filename) != 0) { | |
| last_error = cannot_open_error; | |
| lt_dlfree(handle->handle); | |
| return 1; | |
| } | |
| return 0; | |
| } | } |
| static int | static int |
| sys_dld_close (handle) | sys_dld_close (loader_data, module) |
| lt_dlhandle handle; | lt_user_data loader_data; |
| lt_module module; | |
| { | { |
| if (dld_unlink_by_file((char*)(handle->handle), 1) != 0) { | int errors = 0; |
| last_error = cannot_close_error; | |
| return 1; | if (dld_unlink_by_file ((char*)(module), 1) != 0) |
| } | { |
| lt_dlfree(handle->filename); | LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CANNOT_CLOSE)); |
| return 0; | ++errors; |
| } | |
| else | |
| { | |
| LT_DLFREE (module); | |
| } | |
| return errors; | |
| } | } |
| static lt_ptr_t | static lt_ptr |
| sys_dld_sym (handle, symbol) | sys_dld_sym (loader_data, module, symbol) |
| lt_dlhandle handle; | lt_user_data loader_data; |
| const char *symbol; | lt_module module; |
| const char *symbol; | |
| { | { |
| lt_ptr_t address = dld_get_func(symbol); | lt_ptr address = dld_get_func (symbol); |
| if (!address) | if (!address) |
| last_error = symbol_error; | { |
| return address; | LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); |
| } | |
| return address; | |
| } | } |
| static | static struct lt_user_dlloader sys_dld = { |
| lt_dltype_t | 0, sys_dld_open, sys_dld_close, sys_dld_sym, 0, 0 |
| sys_dld = { LTDL_TYPE_TOP, 0, sys_dld_init, sys_dld_exit, | }; |
| sys_dld_open, sys_dld_close, sys_dld_sym }; | |
| #undef LTDL_TYPE_TOP | #endif /* HAVE_DLD */ |
| #define LTDL_TYPE_TOP &sys_dld | |
| #endif | |
| #ifdef _WIN32 | |
| /* dynamic linking for Win32 */ | |
| /* --- DLPREOPEN() INTERFACE LOADER --- */ | |
| #include <windows.h> | |
| /* emulate dynamic linking using preloaded_symbols */ | |
| typedef struct lt_dlsymlists_t | |
| { | |
| struct lt_dlsymlists_t *next; | |
| const lt_dlsymlist *syms; | |
| } lt_dlsymlists_t; | |
| static const lt_dlsymlist *default_preloaded_symbols = NULL; | |
| static lt_dlsymlists_t *preloaded_symbols = NULL; | |
| static int | static int |
| sys_wll_init LTDL_PARAMS((void)) | presym_init (loader_data) |
| lt_user_data loader_data; | |
| { | { |
| return 0; | int errors = 0; |
| LT_DLMUTEX_LOCK (); | |
| preloaded_symbols = NULL; | |
| if (default_preloaded_symbols) | |
| { | |
| errors = lt_dlpreload (default_preloaded_symbols); | |
| } | |
| LT_DLMUTEX_UNLOCK (); | |
| return errors; | |
| } | } |
| static int | static int |
| sys_wll_exit LTDL_PARAMS((void)) | presym_free_symlists () |
| { | { |
| return 0; | lt_dlsymlists_t *lists; |
| LT_DLMUTEX_LOCK (); | |
| lists = preloaded_symbols; | |
| while (lists) | |
| { | |
| lt_dlsymlists_t *tmp = lists; | |
| lists = lists->next; | |
| LT_DLFREE (tmp); | |
| } | |
| preloaded_symbols = NULL; | |
| LT_DLMUTEX_UNLOCK (); | |
| return 0; | |
| } | } |
| /* Forward declaration; required to implement handle search below. */ | static int |
| static lt_dlhandle handles; | presym_exit (loader_data) |
| lt_user_data loader_data; | |
| { | |
| presym_free_symlists (); | |
| return 0; | |
| } | |
| static int | static int |
| sys_wll_open (handle, filename) | presym_add_symlist (preloaded) |
| lt_dlhandle handle; | const lt_dlsymlist *preloaded; |
| const char *filename; | { |
| { | lt_dlsymlists_t *tmp; |
| lt_dlhandle cur; | lt_dlsymlists_t *lists; |
| char *searchname = NULL; | int errors = 0; |
| char *ext = strrchr(filename, '.'); | |
| LT_DLMUTEX_LOCK (); | |
| if (ext) { | |
| /* FILENAME already has an extension. */ | lists = preloaded_symbols; |
| searchname = strdup(filename); | while (lists) |
| } else { | { |
| /* Append a `.' to stop Windows from adding an | if (lists->syms == preloaded) |
| implicit `.dll' extension. */ | { |
| searchname = (char*)lt_dlmalloc(2+ strlen(filename)); | goto done; |
| strcpy(searchname, filename); | } |
| strcat(searchname, "."); | lists = lists->next; |
| } | } |
| handle->handle = LoadLibrary(searchname); | tmp = LT_EMALLOC (lt_dlsymlists_t, 1); |
| lt_dlfree(searchname); | if (tmp) |
| { | |
| /* libltdl expects this function to fail if it is unable | memset (tmp, 0, sizeof(lt_dlsymlists_t)); |
| to physically load the library. Sadly, LoadLibrary | tmp->syms = preloaded; |
| will search the loaded libraries for a match and return | tmp->next = preloaded_symbols; |
| one of them if the path search load fails. | preloaded_symbols = tmp; |
| } | |
| We check whether LoadLibrary is returning a handle to | else |
| an already loaded module, and simulate failure if we | { |
| find one. */ | ++errors; |
| cur = handles; | } |
| while (cur) { | |
| if (!cur->handle) { | done: |
| cur = 0; | LT_DLMUTEX_UNLOCK (); |
| break; | return errors; |
| } | } |
| if (cur->handle == handle->handle) | |
| break; | static lt_module |
| cur = cur->next; | presym_open (loader_data, filename) |
| lt_user_data loader_data; | |
| const char *filename; | |
| { | |
| lt_dlsymlists_t *lists; | |
| lt_module module = (lt_module) 0; | |
| LT_DLMUTEX_LOCK (); | |
| lists = preloaded_symbols; | |
| if (!lists) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_SYMBOLS)); | |
| goto done; | |
| } | |
| /* Can't use NULL as the reflective symbol header, as NULL is | |
| used to mark the end of the entire symbol list. Self-dlpreopened | |
| symbols follow this magic number, chosen to be an unlikely | |
| clash with a real module name. */ | |
| if (!filename) | |
| { | |
| filename = "@PROGRAM@"; | |
| } | |
| while (lists) | |
| { | |
| const lt_dlsymlist *syms = lists->syms; | |
| while (syms->name) | |
| { | |
| if (!syms->address && strcmp(syms->name, filename) == 0) | |
| { | |
| module = (lt_module) syms; | |
| goto done; | |
| } | |
| ++syms; | |
| } | |
| lists = lists->next; | |
| } | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); | |
| done: | |
| LT_DLMUTEX_UNLOCK (); | |
| return module; | |
| } | |
| static int | |
| presym_close (loader_data, module) | |
| lt_user_data loader_data; | |
| lt_module module; | |
| { | |
| /* Just to silence gcc -Wall */ | |
| module = NULL; | |
| return 0; | |
| } | |
| static lt_ptr | |
| presym_sym (loader_data, module, symbol) | |
| lt_user_data loader_data; | |
| lt_module module; | |
| const char *symbol; | |
| { | |
| lt_dlsymlist *syms = (lt_dlsymlist*) module; | |
| ++syms; | |
| while (syms->address) | |
| { | |
| if (strcmp(syms->name, symbol) == 0) | |
| { | |
| return syms->address; | |
| } | |
| ++syms; | |
| } | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); | |
| return 0; | |
| } | |
| static struct lt_user_dlloader presym = { | |
| 0, presym_open, presym_close, presym_sym, presym_exit, 0 | |
| }; | |
| /* --- DYNAMIC MODULE LOADING --- */ | |
| /* The type of a function used at each iteration of foreach_dirinpath(). */ | |
| typedef int foreach_callback_func LT_PARAMS((char *filename, lt_ptr data1, | |
| lt_ptr data2)); | |
| static int foreach_dirinpath LT_PARAMS((const char *search_path, | |
| const char *base_name, | |
| foreach_callback_func *func, | |
| lt_ptr data1, lt_ptr data2)); | |
| static int find_file_callback LT_PARAMS((char *filename, lt_ptr data, | |
| lt_ptr ignored)); | |
| static int find_handle_callback LT_PARAMS((char *filename, lt_ptr data, | |
| lt_ptr ignored)); | |
| static int foreachfile_callback LT_PARAMS((char *filename, lt_ptr data1, | |
| lt_ptr data2)); | |
| static int canonicalize_path LT_PARAMS((const char *path, | |
| char **pcanonical)); | |
| static int argzize_path LT_PARAMS((const char *path, | |
| char **pargz, | |
| size_t *pargz_len)); | |
| static FILE *find_file LT_PARAMS((const char *search_path, | |
| const char *base_name, | |
| char **pdir)); | |
| static lt_dlhandle *find_handle LT_PARAMS((const char *search_path, | |
| const char *base_name, | |
| lt_dlhandle *handle)); | |
| static int find_module LT_PARAMS((lt_dlhandle *handle, | |
| const char *dir, | |
| const char *libdir, | |
| const char *dlname, | |
| const char *old_name, | |
| int installed)); | |
| static int free_vars LT_PARAMS((char *dlname, char *oldname, | |
| char *libdir, char *deplibs)); | |
| static int load_deplibs LT_PARAMS((lt_dlhandle handle, | |
| char *deplibs)); | |
| static int trim LT_PARAMS((char **dest, | |
| const char *str)); | |
| static int try_dlopen LT_PARAMS((lt_dlhandle *handle, | |
| const char *filename)); | |
| static int tryall_dlopen LT_PARAMS((lt_dlhandle *handle, | |
| const char *filename)); | |
| static int unload_deplibs LT_PARAMS((lt_dlhandle handle)); | |
| static int lt_argz_insert LT_PARAMS((char **pargz, | |
| size_t *pargz_len, | |
| char *before, | |
| const char *entry)); | |
| static int lt_argz_insertinorder LT_PARAMS((char **pargz, | |
| size_t *pargz_len, | |
| const char *entry)); | |
| static int lt_argz_insertdir LT_PARAMS((char **pargz, | |
| size_t *pargz_len, | |
| const char *dirnam, | |
| struct dirent *dp)); | |
| static int lt_dlpath_insertdir LT_PARAMS((char **ppath, | |
| char *before, | |
| const char *dir)); | |
| static int list_files_by_dir LT_PARAMS((const char *dirnam, | |
| char **pargz, | |
| size_t *pargz_len)); | |
| static int file_not_found LT_PARAMS((void)); | |
| static char *user_search_path= NULL; | |
| static lt_dlloader *loaders = NULL; | |
| static lt_dlhandle handles = NULL; | |
| static int initialized = 0; | |
| /* Initialize libltdl. */ | |
| int | |
| lt_dlinit () | |
| { | |
| int errors = 0; | |
| LT_DLMUTEX_LOCK (); | |
| /* Initialize only at first call. */ | |
| if (++initialized == 1) | |
| { | |
| handles = NULL; | |
| user_search_path = NULL; /* empty search path */ | |
| #if HAVE_LIBDL && !defined(__CYGWIN__) | |
| errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dl, "dlopen"); | |
| #endif | |
| #if HAVE_SHL_LOAD | |
| errors += lt_dlloader_add (lt_dlloader_next (0), &sys_shl, "dlopen"); | |
| #endif | |
| #ifdef __WINDOWS__ | |
| errors += lt_dlloader_add (lt_dlloader_next (0), &sys_wll, "dlopen"); | |
| #endif | |
| #ifdef __BEOS__ | |
| errors += lt_dlloader_add (lt_dlloader_next (0), &sys_bedl, "dlopen"); | |
| #endif | |
| #if HAVE_DLD | |
| errors += lt_dlloader_add (lt_dlloader_next (0), &sys_dld, "dld"); | |
| #endif | |
| errors += lt_dlloader_add (lt_dlloader_next (0), &presym, "dlpreload"); | |
| if (presym_init (presym.dlloader_data)) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INIT_LOADER)); | |
| ++errors; | |
| } | |
| else if (errors != 0) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (DLOPEN_NOT_SUPPORTED)); | |
| ++errors; | |
| } | } |
| } | |
| if (cur || !handle->handle) { | LT_DLMUTEX_UNLOCK (); |
| last_error = cannot_open_error; | |
| return 1; | return errors; |
| } | |
| int | |
| lt_dlpreload (preloaded) | |
| const lt_dlsymlist *preloaded; | |
| { | |
| int errors = 0; | |
| if (preloaded) | |
| { | |
| errors = presym_add_symlist (preloaded); | |
| } | |
| else | |
| { | |
| presym_free_symlists(); | |
| LT_DLMUTEX_LOCK (); | |
| if (default_preloaded_symbols) | |
| { | |
| errors = lt_dlpreload (default_preloaded_symbols); | |
| } | } |
| LT_DLMUTEX_UNLOCK (); | |
| } | |
| return 0; | return errors; |
| } | |
| int | |
| lt_dlpreload_default (preloaded) | |
| const lt_dlsymlist *preloaded; | |
| { | |
| LT_DLMUTEX_LOCK (); | |
| default_preloaded_symbols = preloaded; | |
| LT_DLMUTEX_UNLOCK (); | |
| return 0; | |
| } | |
| int | |
| lt_dlexit () | |
| { | |
| /* shut down libltdl */ | |
| lt_dlloader *loader; | |
| int errors = 0; | |
| LT_DLMUTEX_LOCK (); | |
| loader = loaders; | |
| if (!initialized) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SHUTDOWN)); | |
| ++errors; | |
| goto done; | |
| } | |
| /* shut down only at last call. */ | |
| if (--initialized == 0) | |
| { | |
| int level; | |
| while (handles && LT_DLIS_RESIDENT (handles)) | |
| { | |
| handles = handles->next; | |
| } | |
| /* close all modules */ | |
| for (level = 1; handles; ++level) | |
| { | |
| lt_dlhandle cur = handles; | |
| int saw_nonresident = 0; | |
| while (cur) | |
| { | |
| lt_dlhandle tmp = cur; | |
| cur = cur->next; | |
| if (!LT_DLIS_RESIDENT (tmp)) | |
| saw_nonresident = 1; | |
| if (!LT_DLIS_RESIDENT (tmp) && tmp->info.ref_count <= level) | |
| { | |
| if (lt_dlclose (tmp)) | |
| { | |
| ++errors; | |
| } | |
| } | |
| } | |
| /* done if only resident modules are left */ | |
| if (!saw_nonresident) | |
| break; | |
| } | |
| /* close all loaders */ | |
| while (loader) | |
| { | |
| lt_dlloader *next = loader->next; | |
| lt_user_data data = loader->dlloader_data; | |
| if (loader->dlloader_exit && loader->dlloader_exit (data)) | |
| { | |
| ++errors; | |
| } | |
| LT_DLMEM_REASSIGN (loader, next); | |
| } | |
| loaders = NULL; | |
| } | |
| done: | |
| LT_DLMUTEX_UNLOCK (); | |
| return errors; | |
| } | } |
| static int | static int |
| sys_wll_close (handle) | tryall_dlopen (handle, filename) |
| lt_dlhandle handle; | lt_dlhandle *handle; |
| const char *filename; | |
| { | { |
| if (FreeLibrary(handle->handle) == 0) { | lt_dlhandle cur; |
| last_error = cannot_close_error; | lt_dlloader *loader; |
| return 1; | const char *saved_error; |
| } | int errors = 0; |
| return 0; | |
| LT_DLMUTEX_GETERROR (saved_error); | |
| LT_DLMUTEX_LOCK (); | |
| cur = handles; | |
| loader = loaders; | |
| /* check whether the module was already opened */ | |
| while (cur) | |
| { | |
| /* try to dlopen the program itself? */ | |
| if (!cur->info.filename && !filename) | |
| { | |
| break; | |
| } | |
| if (cur->info.filename && filename | |
| && strcmp (cur->info.filename, filename) == 0) | |
| { | |
| break; | |
| } | |
| cur = cur->next; | |
| } | |
| if (cur) | |
| { | |
| ++cur->info.ref_count; | |
| *handle = cur; | |
| goto done; | |
| } | |
| cur = *handle; | |
| if (filename) | |
| { | |
| cur->info.filename = lt_estrdup (filename); | |
| if (!cur->info.filename) | |
| { | |
| ++errors; | |
| goto done; | |
| } | |
| } | |
| else | |
| { | |
| cur->info.filename = NULL; | |
| } | |
| while (loader) | |
| { | |
| lt_user_data data = loader->dlloader_data; | |
| cur->module = loader->module_open (data, filename); | |
| if (cur->module != NULL) | |
| { | |
| break; | |
| } | |
| loader = loader->next; | |
| } | |
| if (!loader) | |
| { | |
| LT_DLFREE (cur->info.filename); | |
| ++errors; | |
| goto done; | |
| } | |
| cur->loader = loader; | |
| LT_DLMUTEX_SETERROR (saved_error); | |
| done: | |
| LT_DLMUTEX_UNLOCK (); | |
| return errors; | |
| } | |
| static int | |
| tryall_dlopen_module (handle, prefix, dirname, dlname) | |
| lt_dlhandle *handle; | |
| const char *prefix; | |
| const char *dirname; | |
| const char *dlname; | |
| { | |
| int error = 0; | |
| char *filename = NULL; | |
| size_t filename_len = 0; | |
| size_t dirname_len = LT_STRLEN (dirname); | |
| assert (handle); | |
| assert (dirname); | |
| assert (dlname); | |
| #ifdef LT_DIRSEP_CHAR | |
| /* Only canonicalized names (i.e. with DIRSEP chars already converted) | |
| should make it into this function: */ | |
| assert (strchr (dirname, LT_DIRSEP_CHAR) == NULL); | |
| #endif | |
| if (dirname[dirname_len -1] == '/') | |
| --dirname_len; | |
| filename_len = dirname_len + 1 + LT_STRLEN (dlname); | |
| /* Allocate memory, and combine DIRNAME and MODULENAME into it. | |
| The PREFIX (if any) is handled below. */ | |
| filename = LT_EMALLOC (char, dirname_len + 1 + filename_len + 1); | |
| if (!filename) | |
| return 1; | |
| sprintf (filename, "%.*s/%s", (int) dirname_len, dirname, dlname); | |
| /* Now that we have combined DIRNAME and MODULENAME, if there is | |
| also a PREFIX to contend with, simply recurse with the arguments | |
| shuffled. Otherwise, attempt to open FILENAME as a module. */ | |
| if (prefix) | |
| { | |
| error += tryall_dlopen_module (handle, | |
| (const char *) 0, prefix, filename); | |
| } | |
| else if (tryall_dlopen (handle, filename) != 0) | |
| { | |
| ++error; | |
| } | |
| LT_DLFREE (filename); | |
| return error; | |
| } | } |
| static lt_ptr_t | static int |
| sys_wll_sym (handle, symbol) | find_module (handle, dir, libdir, dlname, old_name, installed) |
| lt_dlhandle handle; | lt_dlhandle *handle; |
| const char *symbol; | const char *dir; |
| { | const char *libdir; |
| lt_ptr_t address = GetProcAddress(handle->handle, symbol); | const char *dlname; |
| const char *old_name; | |
| if (!address) | int installed; |
| last_error = symbol_error; | { |
| return address; | /* Try to open the old library first; if it was dlpreopened, |
| } | we want the preopened version of it, even if a dlopenable |
| module is available. */ | |
| static | if (old_name && tryall_dlopen (handle, old_name) == 0) |
| lt_dltype_t | { |
| sys_wll = { LTDL_TYPE_TOP, 0, sys_wll_init, sys_wll_exit, | return 0; |
| sys_wll_open, sys_wll_close, sys_wll_sym }; | } |
| /* Try to open the dynamic library. */ | |
| if (dlname) | |
| { | |
| /* try to open the installed module */ | |
| if (installed && libdir) | |
| { | |
| if (tryall_dlopen_module (handle, | |
| (const char *) 0, libdir, dlname) == 0) | |
| return 0; | |
| } | |
| /* try to open the not-installed module */ | |
| if (!installed) | |
| { | |
| if (tryall_dlopen_module (handle, dir, objdir, dlname) == 0) | |
| return 0; | |
| } | |
| /* maybe it was moved to another directory */ | |
| { | |
| if (tryall_dlopen_module (handle, | |
| (const char *) 0, dir, dlname) == 0) | |
| return 0; | |
| } | |
| } | |
| return 1; | |
| } | |
| static int | |
| canonicalize_path (path, pcanonical) | |
| const char *path; | |
| char **pcanonical; | |
| { | |
| char *canonical = NULL; | |
| assert (path && *path); | |
| assert (pcanonical); | |
| canonical = LT_EMALLOC (char, 1+ LT_STRLEN (path)); | |
| if (!canonical) | |
| return 1; | |
| { | |
| size_t dest = 0; | |
| size_t src; | |
| for (src = 0; path[src] != LT_EOS_CHAR; ++src) | |
| { | |
| /* Path separators are not copied to the beginning or end of | |
| the destination, or if another separator would follow | |
| immediately. */ | |
| if (path[src] == LT_PATHSEP_CHAR) | |
| { | |
| if ((dest == 0) | |
| || (path[1+ src] == LT_PATHSEP_CHAR) | |
| || (path[1+ src] == LT_EOS_CHAR)) | |
| continue; | |
| } | |
| /* Anything other than a directory separator is copied verbatim. */ | |
| if ((path[src] != '/') | |
| #ifdef LT_DIRSEP_CHAR | |
| && (path[src] != LT_DIRSEP_CHAR) | |
| #endif | |
| ) | |
| { | |
| canonical[dest++] = path[src]; | |
| } | |
| /* Directory separators are converted and copied only if they are | |
| not at the end of a path -- i.e. before a path separator or | |
| NULL terminator. */ | |
| else if ((path[1+ src] != LT_PATHSEP_CHAR) | |
| && (path[1+ src] != LT_EOS_CHAR) | |
| #ifdef LT_DIRSEP_CHAR | |
| && (path[1+ src] != LT_DIRSEP_CHAR) | |
| #endif | |
| && (path[1+ src] != '/')) | |
| { | |
| canonical[dest++] = '/'; | |
| } | |
| } | |
| /* Add an end-of-string marker at the end. */ | |
| canonical[dest] = LT_EOS_CHAR; | |
| } | |
| /* Assign new value. */ | |
| *pcanonical = canonical; | |
| return 0; | |
| } | |
| static int | |
| argzize_path (path, pargz, pargz_len) | |
| const char *path; | |
| char **pargz; | |
| size_t *pargz_len; | |
| { | |
| error_t error; | |
| assert (path); | |
| assert (pargz); | |
| assert (pargz_len); | |
| if ((error = argz_create_sep (path, LT_PATHSEP_CHAR, pargz, pargz_len))) | |
| { | |
| switch (error) | |
| { | |
| case ENOMEM: | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); | |
| break; | |
| default: | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (UNKNOWN)); | |
| break; | |
| } | |
| return 1; | |
| } | |
| return 0; | |
| } | |
| /* Repeatedly call FUNC with each LT_PATHSEP_CHAR delimited element | |
| of SEARCH_PATH and references to DATA1 and DATA2, until FUNC returns | |
| non-zero or all elements are exhausted. If BASE_NAME is non-NULL, | |
| it is appended to each SEARCH_PATH element before FUNC is called. */ | |
| static int | |
| foreach_dirinpath (search_path, base_name, func, data1, data2) | |
| const char *search_path; | |
| const char *base_name; | |
| foreach_callback_func *func; | |
| lt_ptr data1; | |
| lt_ptr data2; | |
| { | |
| int result = 0; | |
| int filenamesize = 0; | |
| size_t lenbase = LT_STRLEN (base_name); | |
| size_t argz_len = 0; | |
| char *argz = NULL; | |
| char *filename = NULL; | |
| char *canonical = NULL; | |
| LT_DLMUTEX_LOCK (); | |
| if (!search_path || !*search_path) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); | |
| goto cleanup; | |
| } | |
| if (canonicalize_path (search_path, &canonical) != 0) | |
| goto cleanup; | |
| if (argzize_path (canonical, &argz, &argz_len) != 0) | |
| goto cleanup; | |
| { | |
| char *dir_name = NULL; | |
| while ((dir_name = argz_next (argz, argz_len, dir_name))) | |
| { | |
| size_t lendir = LT_STRLEN (dir_name); | |
| if (lendir +1 +lenbase >= filenamesize) | |
| { | |
| LT_DLFREE (filename); | |
| filenamesize = lendir +1 +lenbase +1; /* "/d" + '/' + "f" + '\0' */ | |
| filename = LT_EMALLOC (char, filenamesize); | |
| if (!filename) | |
| goto cleanup; | |
| } | |
| assert (filenamesize > lendir); | |
| strcpy (filename, dir_name); | |
| if (base_name && *base_name) | |
| { | |
| if (filename[lendir -1] != '/') | |
| filename[lendir++] = '/'; | |
| strcpy (filename +lendir, base_name); | |
| } | |
| if ((result = (*func) (filename, data1, data2))) | |
| { | |
| break; | |
| } | |
| } | |
| } | |
| cleanup: | |
| LT_DLFREE (argz); | |
| LT_DLFREE (canonical); | |
| LT_DLFREE (filename); | |
| LT_DLMUTEX_UNLOCK (); | |
| return result; | |
| } | |
| /* If FILEPATH can be opened, store the name of the directory component | |
| in DATA1, and the opened FILE* structure address in DATA2. Otherwise | |
| DATA1 is unchanged, but DATA2 is set to a pointer to NULL. */ | |
| static int | |
| find_file_callback (filename, data1, data2) | |
| char *filename; | |
| lt_ptr data1; | |
| lt_ptr data2; | |
| { | |
| char **pdir = (char **) data1; | |
| FILE **pfile = (FILE **) data2; | |
| int is_done = 0; | |
| assert (filename && *filename); | |
| assert (pdir); | |
| assert (pfile); | |
| if ((*pfile = fopen (filename, LT_READTEXT_MODE))) | |
| { | |
| char *dirend = strrchr (filename, '/'); | |
| if (dirend > filename) | |
| *dirend = LT_EOS_CHAR; | |
| LT_DLFREE (*pdir); | |
| *pdir = lt_estrdup (filename); | |
| is_done = (*pdir == NULL) ? -1 : 1; | |
| } | |
| return is_done; | |
| } | |
| static FILE * | |
| find_file (search_path, base_name, pdir) | |
| const char *search_path; | |
| const char *base_name; | |
| char **pdir; | |
| { | |
| FILE *file = NULL; | |
| foreach_dirinpath (search_path, base_name, find_file_callback, pdir, &file); | |
| return file; | |
| } | |
| static int | |
| find_handle_callback (filename, data, ignored) | |
| char *filename; | |
| lt_ptr data; | |
| lt_ptr ignored; | |
| { | |
| lt_dlhandle *handle = (lt_dlhandle *) data; | |
| int notfound = access (filename, R_OK); | |
| /* Bail out if file cannot be read... */ | |
| if (notfound) | |
| return 0; | |
| /* Try to dlopen the file, but do not continue searching in any | |
| case. */ | |
| if (tryall_dlopen (handle, filename) != 0) | |
| *handle = NULL; | |
| return 1; | |
| } | |
| /* If HANDLE was found return it, otherwise return 0. If HANDLE was | |
| found but could not be opened, *HANDLE will be set to 0. */ | |
| static lt_dlhandle * | |
| find_handle (search_path, base_name, handle) | |
| const char *search_path; | |
| const char *base_name; | |
| lt_dlhandle *handle; | |
| { | |
| if (!search_path) | |
| return 0; | |
| if (!foreach_dirinpath (search_path, base_name, find_handle_callback, | |
| handle, 0)) | |
| return 0; | |
| return handle; | |
| } | |
| static int | |
| load_deplibs (handle, deplibs) | |
| lt_dlhandle handle; | |
| char *deplibs; | |
| { | |
| #if LTDL_DLOPEN_DEPLIBS | |
| char *p, *save_search_path = NULL; | |
| int depcount = 0; | |
| int i; | |
| char **names = NULL; | |
| #endif | |
| int errors = 0; | |
| handle->depcount = 0; | |
| #if LTDL_DLOPEN_DEPLIBS | |
| if (!deplibs) | |
| { | |
| return errors; | |
| } | |
| ++errors; | |
| LT_DLMUTEX_LOCK (); | |
| if (user_search_path) | |
| { | |
| save_search_path = lt_estrdup (user_search_path); | |
| if (!save_search_path) | |
| goto cleanup; | |
| } | |
| /* extract search paths and count deplibs */ | |
| p = deplibs; | |
| while (*p) | |
| { | |
| if (!isspace ((int) *p)) | |
| { | |
| char *end = p+1; | |
| while (*end && !isspace((int) *end)) | |
| { | |
| ++end; | |
| } | |
| if (strncmp(p, "-L", 2) == 0 || strncmp(p, "-R", 2) == 0) | |
| { | |
| char save = *end; | |
| *end = '\0'; /* set a temporary string terminator */ | |
| if (lt_dladdsearchdir(p+2)) | |
| { | |
| goto cleanup; | |
| } | |
| *end = save; | |
| } | |
| else | |
| { | |
| ++depcount; | |
| } | |
| p = end; | |
| } | |
| else | |
| { | |
| ++p; | |
| } | |
| } | |
| /* restore the old search path */ | |
| LT_DLFREE (user_search_path); | |
| user_search_path = save_search_path; | |
| LT_DLMUTEX_UNLOCK (); | |
| if (!depcount) | |
| { | |
| errors = 0; | |
| goto cleanup; | |
| } | |
| names = LT_EMALLOC (char *, depcount * sizeof (char*)); | |
| if (!names) | |
| goto cleanup; | |
| /* now only extract the actual deplibs */ | |
| depcount = 0; | |
| p = deplibs; | |
| while (*p) | |
| { | |
| if (isspace ((int) *p)) | |
| { | |
| ++p; | |
| } | |
| else | |
| { | |
| char *end = p+1; | |
| while (*end && !isspace ((int) *end)) | |
| { | |
| ++end; | |
| } | |
| if (strncmp(p, "-L", 2) != 0 && strncmp(p, "-R", 2) != 0) | |
| { | |
| char *name; | |
| char save = *end; | |
| *end = '\0'; /* set a temporary string terminator */ | |
| if (strncmp(p, "-l", 2) == 0) | |
| { | |
| size_t name_len = 3+ /* "lib" */ LT_STRLEN (p + 2); | |
| name = LT_EMALLOC (char, 1+ name_len); | |
| if (name) | |
| sprintf (name, "lib%s", p+2); | |
| } | |
| else | |
| name = lt_estrdup(p); | |
| #undef LTDL_TYPE_TOP | if (!name) |
| #define LTDL_TYPE_TOP &sys_wll | goto cleanup_names; |
| #endif | names[depcount++] = name; |
| *end = save; | |
| } | |
| p = end; | |
| } | |
| } | |
| #ifdef __BEOS__ | /* load the deplibs (in reverse order) |
| At this stage, don't worry if the deplibs do not load correctly, | |
| they may already be statically linked into the loading application | |
| for instance. There will be a more enlightening error message | |
| later on if the loaded module cannot resolve all of its symbols. */ | |
| if (depcount) | |
| { | |
| int j = 0; | |
| /* dynamic linking for BeOS */ | handle->deplibs = (lt_dlhandle*) LT_EMALLOC (lt_dlhandle *, depcount); |
| if (!handle->deplibs) | |
| goto cleanup; | |
| #include <kernel/image.h> | for (i = 0; i < depcount; ++i) |
| { | |
| handle->deplibs[j] = lt_dlopenext(names[depcount-1-i]); | |
| if (handle->deplibs[j]) | |
| { | |
| ++j; | |
| } | |
| } | |
| handle->depcount = j; /* Number of successfully loaded deplibs */ | |
| errors = 0; | |
| } | |
| cleanup_names: | |
| for (i = 0; i < depcount; ++i) | |
| { | |
| LT_DLFREE (names[i]); | |
| } | |
| cleanup: | |
| LT_DLFREE (names); | |
| #endif | |
| return errors; | |
| } | |
| static int | static int |
| sys_bedl_init LTDL_PARAMS((void)) | unload_deplibs (handle) |
| lt_dlhandle handle; | |
| { | { |
| return 0; | int i; |
| int errors = 0; | |
| if (handle->depcount) | |
| { | |
| for (i = 0; i < handle->depcount; ++i) | |
| { | |
| if (!LT_DLIS_RESIDENT (handle->deplibs[i])) | |
| { | |
| errors += lt_dlclose (handle->deplibs[i]); | |
| } | |
| } | |
| } | |
| return errors; | |
| } | } |
| static int | static int |
| sys_bedl_exit LTDL_PARAMS((void)) | trim (dest, str) |
| char **dest; | |
| const char *str; | |
| { | { |
| return 0; | /* remove the leading and trailing "'" from str |
| and store the result in dest */ | |
| const char *end = strrchr (str, '\''); | |
| size_t len = LT_STRLEN (str); | |
| char *tmp; | |
| LT_DLFREE (*dest); | |
| if (len > 3 && str[0] == '\'') | |
| { | |
| tmp = LT_EMALLOC (char, end - str); | |
| if (!tmp) | |
| return 1; | |
| strncpy(tmp, &str[1], (end - str) - 1); | |
| tmp[len-3] = LT_EOS_CHAR; | |
| *dest = tmp; | |
| } | |
| else | |
| { | |
| *dest = NULL; | |
| } | |
| return 0; | |
| } | } |
| static int | static int |
| sys_bedl_open (handle, filename) | free_vars (dlname, oldname, libdir, deplibs) |
| lt_dlhandle handle; | char *dlname; |
| const char *filename; | char *oldname; |
| { | char *libdir; |
| image_id image = 0; | char *deplibs; |
| { | |
| if (filename) { | LT_DLFREE (dlname); |
| image = load_add_on(filename); | LT_DLFREE (oldname); |
| } else { | LT_DLFREE (libdir); |
| image_info info; | LT_DLFREE (deplibs); |
| int32 cookie = 0; | |
| if (get_next_image_info(0, &cookie, &info) == B_OK) | return 0; |
| image = load_add_on(info.name); | |
| } | |
| if (image <= 0) { | |
| last_error = cannot_open_error; | |
| return 1; | |
| } | |
| handle->handle = (void*) image; | |
| return 0; | |
| } | } |
| static int | static int |
| sys_bedl_close (handle) | try_dlopen (phandle, filename) |
| lt_dlhandle handle; | lt_dlhandle *phandle; |
| const char *filename; | |
| { | { |
| if (unload_add_on((image_id)handle->handle) != B_OK) { | const char * ext = NULL; |
| last_error = cannot_close_error; | const char * saved_error = NULL; |
| return 1; | char * canonical = NULL; |
| } | char * base_name = NULL; |
| return 0; | char * dir = NULL; |
| } | char * name = NULL; |
| int errors = 0; | |
| lt_dlhandle newhandle; | |
| static lt_ptr_t | assert (phandle); |
| sys_bedl_sym (handle, symbol) | assert (*phandle == NULL); |
| lt_dlhandle handle; | |
| const char *symbol; | |
| { | |
| lt_ptr_t address = 0; | |
| image_id image = (image_id)handle->handle; | |
| if (get_image_symbol(image, symbol, B_SYMBOL_TYPE_ANY, | |
| &address) != B_OK) { | |
| last_error = symbol_error; | |
| return 0; | |
| } | |
| return address; | |
| } | |
| static | |
| lt_dltype_t | |
| sys_bedl = { LTDL_TYPE_TOP, 0, sys_bedl_init, sys_bedl_exit, | |
| sys_bedl_open, sys_bedl_close, sys_bedl_sym }; | |
| #undef LTDL_TYPE_TOP | LT_DLMUTEX_GETERROR (saved_error); |
| #define LTDL_TYPE_TOP &sys_bedl | |
| /* dlopen self? */ | |
| if (!filename) | |
| { | |
| *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1); | |
| if (*phandle == NULL) | |
| return 1; | |
| memset (*phandle, 0, sizeof(struct lt_dlhandle_struct)); | |
| newhandle = *phandle; | |
| /* lt_dlclose()ing yourself is very bad! Disallow it. */ | |
| LT_DLSET_FLAG (*phandle, LT_DLRESIDENT_FLAG); | |
| if (tryall_dlopen (&newhandle, 0) != 0) | |
| { | |
| LT_DLFREE (*phandle); | |
| return 1; | |
| } | |
| goto register_handle; | |
| } | |
| assert (filename && *filename); | |
| /* Doing this immediately allows internal functions to safely | |
| assume only canonicalized paths are passed. */ | |
| if (canonicalize_path (filename, &canonical) != 0) | |
| { | |
| ++errors; | |
| goto cleanup; | |
| } | |
| /* If the canonical module name is a path (relative or absolute) | |
| then split it into a directory part and a name part. */ | |
| base_name = strrchr (canonical, '/'); | |
| if (base_name) | |
| { | |
| size_t dirlen = (1+ base_name) - canonical; | |
| dir = LT_EMALLOC (char, 1+ dirlen); | |
| if (!dir) | |
| { | |
| ++errors; | |
| goto cleanup; | |
| } | |
| strncpy (dir, canonical, dirlen); | |
| dir[dirlen] = LT_EOS_CHAR; | |
| ++base_name; | |
| } | |
| else | |
| LT_DLMEM_REASSIGN (base_name, canonical); | |
| assert (base_name && *base_name); | |
| /* Check whether we are opening a libtool module (.la extension). */ | |
| ext = strrchr (base_name, '.'); | |
| if (ext && strcmp (ext, archive_ext) == 0) | |
| { | |
| /* this seems to be a libtool module */ | |
| FILE * file = NULL; | |
| char * dlname = NULL; | |
| char * old_name = NULL; | |
| char * libdir = NULL; | |
| char * deplibs = NULL; | |
| char * line = NULL; | |
| size_t line_len; | |
| /* if we can't find the installed flag, it is probably an | |
| installed libtool archive, produced with an old version | |
| of libtool */ | |
| int installed = 1; | |
| /* extract the module name from the file name */ | |
| name = LT_EMALLOC (char, ext - base_name + 1); | |
| if (!name) | |
| { | |
| ++errors; | |
| goto cleanup; | |
| } | |
| /* canonicalize the module name */ | |
| { | |
| size_t i; | |
| for (i = 0; i < ext - base_name; ++i) | |
| { | |
| if (isalnum ((int)(base_name[i]))) | |
| { | |
| name[i] = base_name[i]; | |
| } | |
| else | |
| { | |
| name[i] = '_'; | |
| } | |
| } | |
| name[ext - base_name] = LT_EOS_CHAR; | |
| } | |
| /* Now try to open the .la file. If there is no directory name | |
| component, try to find it first in user_search_path and then other | |
| prescribed paths. Otherwise (or in any case if the module was not | |
| yet found) try opening just the module name as passed. */ | |
| if (!dir) | |
| { | |
| const char *search_path; | |
| LT_DLMUTEX_LOCK (); | |
| search_path = user_search_path; | |
| if (search_path) | |
| file = find_file (user_search_path, base_name, &dir); | |
| LT_DLMUTEX_UNLOCK (); | |
| if (!file) | |
| { | |
| search_path = getenv (LTDL_SEARCHPATH_VAR); | |
| if (search_path) | |
| file = find_file (search_path, base_name, &dir); | |
| } | |
| #ifdef LTDL_SHLIBPATH_VAR | |
| if (!file) | |
| { | |
| search_path = getenv (LTDL_SHLIBPATH_VAR); | |
| if (search_path) | |
| file = find_file (search_path, base_name, &dir); | |
| } | |
| #endif | |
| #ifdef LTDL_SYSSEARCHPATH | |
| if (!file && sys_search_path) | |
| { | |
| file = find_file (sys_search_path, base_name, &dir); | |
| } | |
| #endif | |
| } | |
| if (!file) | |
| { | |
| file = fopen (filename, LT_READTEXT_MODE); | |
| } | |
| /* If we didn't find the file by now, it really isn't there. Set | |
| the status flag, and bail out. */ | |
| if (!file) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); | |
| ++errors; | |
| goto cleanup; | |
| } | |
| line_len = LT_FILENAME_MAX; | |
| line = LT_EMALLOC (char, line_len); | |
| if (!line) | |
| { | |
| fclose (file); | |
| ++errors; | |
| goto cleanup; | |
| } | |
| /* read the .la file */ | |
| while (!feof (file)) | |
| { | |
| if (!fgets (line, (int) line_len, file)) | |
| { | |
| break; | |
| } | |
| /* Handle the case where we occasionally need to read a line | |
| that is longer than the initial buffer size. */ | |
| while (line[LT_STRLEN(line) -1] != '\n') | |
| { | |
| line = LT_DLREALLOC (char, line, line_len *2); | |
| if (!fgets (&line[line_len -1], (int) line_len +1, file)) | |
| { | |
| break; | |
| } | |
| line_len *= 2; | |
| } | |
| if (line[0] == '\n' || line[0] == '#') | |
| { | |
| continue; | |
| } | |
| #undef STR_DLNAME | |
| #define STR_DLNAME "dlname=" | |
| if (strncmp (line, STR_DLNAME, sizeof (STR_DLNAME) - 1) == 0) | |
| { | |
| errors += trim (&dlname, &line[sizeof (STR_DLNAME) - 1]); | |
| } | |
| #undef STR_OLD_LIBRARY | |
| #define STR_OLD_LIBRARY "old_library=" | |
| else if (strncmp (line, STR_OLD_LIBRARY, | |
| sizeof (STR_OLD_LIBRARY) - 1) == 0) | |
| { | |
| errors += trim (&old_name, &line[sizeof (STR_OLD_LIBRARY) - 1]); | |
| } | |
| #undef STR_LIBDIR | |
| #define STR_LIBDIR "libdir=" | |
| else if (strncmp (line, STR_LIBDIR, sizeof (STR_LIBDIR) - 1) == 0) | |
| { | |
| errors += trim (&libdir, &line[sizeof(STR_LIBDIR) - 1]); | |
| } | |
| #undef STR_DL_DEPLIBS | |
| #define STR_DL_DEPLIBS "dependency_libs=" | |
| else if (strncmp (line, STR_DL_DEPLIBS, | |
| sizeof (STR_DL_DEPLIBS) - 1) == 0) | |
| { | |
| errors += trim (&deplibs, &line[sizeof (STR_DL_DEPLIBS) - 1]); | |
| } | |
| else if (strcmp (line, "installed=yes\n") == 0) | |
| { | |
| installed = 1; | |
| } | |
| else if (strcmp (line, "installed=no\n") == 0) | |
| { | |
| installed = 0; | |
| } | |
| #undef STR_LIBRARY_NAMES | |
| #define STR_LIBRARY_NAMES "library_names=" | |
| else if (! dlname && strncmp (line, STR_LIBRARY_NAMES, | |
| sizeof (STR_LIBRARY_NAMES) - 1) == 0) | |
| { | |
| char *last_libname; | |
| errors += trim (&dlname, &line[sizeof (STR_LIBRARY_NAMES) - 1]); | |
| if (!errors | |
| && dlname | |
| && (last_libname = strrchr (dlname, ' ')) != NULL) | |
| { | |
| last_libname = lt_estrdup (last_libname + 1); | |
| if (!last_libname) | |
| { | |
| ++errors; | |
| goto cleanup; | |
| } | |
| LT_DLMEM_REASSIGN (dlname, last_libname); | |
| } | |
| } | |
| if (errors) | |
| break; | |
| } | |
| fclose (file); | |
| LT_DLFREE (line); | |
| /* allocate the handle */ | |
| *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1); | |
| if (*phandle == NULL) | |
| ++errors; | |
| if (errors) | |
| { | |
| free_vars (dlname, old_name, libdir, deplibs); | |
| LT_DLFREE (*phandle); | |
| goto cleanup; | |
| } | |
| assert (*phandle); | |
| memset (*phandle, 0, sizeof(struct lt_dlhandle_struct)); | |
| if (load_deplibs (*phandle, deplibs) == 0) | |
| { | |
| newhandle = *phandle; | |
| /* find_module may replace newhandle */ | |
| if (find_module (&newhandle, dir, libdir, dlname, old_name, installed)) | |
| { | |
| unload_deplibs (*phandle); | |
| ++errors; | |
| } | |
| } | |
| else | |
| { | |
| ++errors; | |
| } | |
| free_vars (dlname, old_name, libdir, deplibs); | |
| if (errors) | |
| { | |
| LT_DLFREE (*phandle); | |
| goto cleanup; | |
| } | |
| if (*phandle != newhandle) | |
| { | |
| unload_deplibs (*phandle); | |
| } | |
| } | |
| else | |
| { | |
| /* not a libtool module */ | |
| *phandle = (lt_dlhandle) LT_EMALLOC (struct lt_dlhandle_struct, 1); | |
| if (*phandle == NULL) | |
| { | |
| ++errors; | |
| goto cleanup; | |
| } | |
| memset (*phandle, 0, sizeof (struct lt_dlhandle_struct)); | |
| newhandle = *phandle; | |
| /* If the module has no directory name component, try to find it | |
| first in user_search_path and then other prescribed paths. | |
| Otherwise (or in any case if the module was not yet found) try | |
| opening just the module name as passed. */ | |
| if ((dir || (!find_handle (user_search_path, base_name, &newhandle) | |
| && !find_handle (getenv (LTDL_SEARCHPATH_VAR), base_name, | |
| &newhandle) | |
| #ifdef LTDL_SHLIBPATH_VAR | |
| && !find_handle (getenv (LTDL_SHLIBPATH_VAR), base_name, | |
| &newhandle) | |
| #endif | |
| #ifdef LTDL_SYSSEARCHPATH | |
| && !find_handle (sys_search_path, base_name, &newhandle) | |
| #endif | #endif |
| ))) | |
| { | |
| if (tryall_dlopen (&newhandle, filename) != 0) | |
| { | |
| newhandle = NULL; | |
| } | |
| } | |
| if (!newhandle) | |
| { | |
| LT_DLFREE (*phandle); | |
| ++errors; | |
| goto cleanup; | |
| } | |
| } | |
| register_handle: | |
| LT_DLMEM_REASSIGN (*phandle, newhandle); | |
| if ((*phandle)->info.ref_count == 0) | |
| { | |
| (*phandle)->info.ref_count = 1; | |
| LT_DLMEM_REASSIGN ((*phandle)->info.name, name); | |
| LT_DLMUTEX_LOCK (); | |
| (*phandle)->next = handles; | |
| handles = *phandle; | |
| LT_DLMUTEX_UNLOCK (); | |
| } | |
| LT_DLMUTEX_SETERROR (saved_error); | |
| cleanup: | |
| LT_DLFREE (dir); | |
| LT_DLFREE (name); | |
| LT_DLFREE (canonical); | |
| /* emulate dynamic linking using preloaded_symbols */ | return errors; |
| } | |
| typedef struct lt_dlsymlists_t { | lt_dlhandle |
| struct lt_dlsymlists_t *next; | lt_dlopen (filename) |
| const lt_dlsymlist *syms; | const char *filename; |
| } lt_dlsymlists_t; | { |
| lt_dlhandle handle = NULL; | |
| static const lt_dlsymlist *default_preloaded_symbols = 0; | /* Just incase we missed a code path in try_dlopen() that reports |
| static lt_dlsymlists_t *preloaded_symbols = 0; | an error, but forgets to reset handle... */ |
| if (try_dlopen (&handle, filename) != 0) | |
| return 0; | |
| return handle; | |
| } | |
| /* If the last error messge store was `FILE_NOT_FOUND', then return | |
| non-zero. */ | |
| static int | static int |
| presym_init LTDL_PARAMS((void)) | file_not_found () |
| { | { |
| preloaded_symbols = 0; | const char *error = NULL; |
| if (default_preloaded_symbols) | |
| return lt_dlpreload(default_preloaded_symbols); | LT_DLMUTEX_GETERROR (error); |
| if (error == LT_DLSTRERROR (FILE_NOT_FOUND)) | |
| return 1; | |
| return 0; | |
| } | |
| /* If FILENAME has an ARCHIVE_EXT or SHLIB_EXT extension, try to | |
| open the FILENAME as passed. Otherwise try appending ARCHIVE_EXT, | |
| and if a file is still not found try again with SHLIB_EXT appended | |
| instead. */ | |
| lt_dlhandle | |
| lt_dlopenext (filename) | |
| const char *filename; | |
| { | |
| lt_dlhandle handle = NULL; | |
| char * tmp = NULL; | |
| char * ext = NULL; | |
| size_t len; | |
| int errors = 0; | |
| if (!filename) | |
| { | |
| return lt_dlopen (filename); | |
| } | |
| assert (filename); | |
| len = LT_STRLEN (filename); | |
| ext = strrchr (filename, '.'); | |
| /* If FILENAME already bears a suitable extension, there is no need | |
| to try appending additional extensions. */ | |
| if (ext && ((strcmp (ext, archive_ext) == 0) | |
| #ifdef LTDL_SHLIB_EXT | |
| || (strcmp (ext, shlib_ext) == 0) | |
| #endif | |
| )) | |
| { | |
| return lt_dlopen (filename); | |
| } | |
| /* First try appending ARCHIVE_EXT. */ | |
| tmp = LT_EMALLOC (char, len + LT_STRLEN (archive_ext) + 1); | |
| if (!tmp) | |
| return 0; | |
| strcpy (tmp, filename); | |
| strcat (tmp, archive_ext); | |
| errors = try_dlopen (&handle, tmp); | |
| /* If we found FILENAME, stop searching -- whether we were able to | |
| load the file as a module or not. If the file exists but loading | |
| failed, it is better to return an error message here than to | |
| report FILE_NOT_FOUND when the alternatives (foo.so etc) are not | |
| in the module search path. */ | |
| if (handle || ((errors > 0) && file_not_found ())) | |
| { | |
| LT_DLFREE (tmp); | |
| return handle; | |
| } | |
| #ifdef LTDL_SHLIB_EXT | |
| /* Try appending SHLIB_EXT. */ | |
| if (LT_STRLEN (shlib_ext) > LT_STRLEN (archive_ext)) | |
| { | |
| LT_DLFREE (tmp); | |
| tmp = LT_EMALLOC (char, len + LT_STRLEN (shlib_ext) + 1); | |
| if (!tmp) | |
| return 0; | return 0; |
| strcpy (tmp, filename); | |
| } | |
| else | |
| { | |
| tmp[len] = LT_EOS_CHAR; | |
| } | |
| strcat(tmp, shlib_ext); | |
| errors = try_dlopen (&handle, tmp); | |
| /* As before, if the file was found but loading failed, return now | |
| with the current error message. */ | |
| if (handle || ((errors > 0) && file_not_found ())) | |
| { | |
| LT_DLFREE (tmp); | |
| return handle; | |
| } | |
| #endif | |
| /* Still here? Then we really did fail to locate any of the file | |
| names we tried. */ | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (FILE_NOT_FOUND)); | |
| LT_DLFREE (tmp); | |
| return 0; | |
| } | } |
| static int | static int |
| presym_free_symlists LTDL_PARAMS((void)) | lt_argz_insert (pargz, pargz_len, before, entry) |
| char **pargz; | |
| size_t *pargz_len; | |
| char *before; | |
| const char *entry; | |
| { | { |
| lt_dlsymlists_t *lists = preloaded_symbols; | error_t error; |
| while (lists) { | if ((error = argz_insert (pargz, pargz_len, before, entry))) |
| lt_dlsymlists_t *tmp = lists; | { |
| switch (error) | |
| lists = lists->next; | { |
| lt_dlfree(tmp); | case ENOMEM: |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (NO_MEMORY)); | |
| break; | |
| default: | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (UNKNOWN)); | |
| break; | |
| } | } |
| preloaded_symbols = 0; | return 1; |
| return 0; | } |
| return 0; | |
| } | } |
| static int | static int |
| presym_exit LTDL_PARAMS((void)) | lt_argz_insertinorder (pargz, pargz_len, entry) |
| char **pargz; | |
| size_t *pargz_len; | |
| const char *entry; | |
| { | { |
| presym_free_symlists(); | char *before = NULL; |
| return 0; | |
| assert (pargz); | |
| assert (pargz_len); | |
| assert (entry && *entry); | |
| if (*pargz) | |
| while ((before = argz_next (*pargz, *pargz_len, before))) | |
| { | |
| int cmp = strcmp (entry, before); | |
| if (cmp < 0) break; | |
| if (cmp == 0) return 0; /* No duplicates! */ | |
| } | |
| return lt_argz_insert (pargz, pargz_len, before, entry); | |
| } | } |
| static int | static int |
| presym_add_symlist (preloaded) | lt_argz_insertdir (pargz, pargz_len, dirnam, dp) |
| const lt_dlsymlist *preloaded; | char **pargz; |
| size_t *pargz_len; | |
| const char *dirnam; | |
| struct dirent *dp; | |
| { | { |
| lt_dlsymlists_t *tmp; | char *buf = NULL; |
| lt_dlsymlists_t *lists = preloaded_symbols; | size_t buf_len = 0; |
| char *end = NULL; | |
| while (lists) { | size_t end_offset = 0; |
| if (lists->syms == preloaded) | size_t dir_len = 0; |
| return 0; | int errors = 0; |
| lists = lists->next; | |
| } | assert (pargz); |
| assert (pargz_len); | |
| tmp = (lt_dlsymlists_t*) lt_dlmalloc(sizeof(lt_dlsymlists_t)); | assert (dp); |
| if (!tmp) { | |
| last_error = memory_error; | dir_len = LT_STRLEN (dirnam); |
| return 1; | end = dp->d_name + LT_D_NAMLEN(dp); |
| } | |
| tmp->syms = preloaded; | /* Ignore version numbers. */ |
| tmp->next = 0; | { |
| if (!preloaded_symbols) | char *p; |
| preloaded_symbols = tmp; | for (p = end; p -1 > dp->d_name; --p) |
| else { | if (strchr (".0123456789", p[-1]) == 0) |
| /* append to the end */ | break; |
| lists = preloaded_symbols; | |
| while (lists->next) | if (*p == '.') |
| lists = lists->next; | end = p; |
| lists->next = tmp; | } |
| /* Ignore filename extension. */ | |
| { | |
| char *p; | |
| for (p = end -1; p > dp->d_name; --p) | |
| if (*p == '.') | |
| { | |
| end = p; | |
| break; | |
| } | } |
| return 0; | } |
| /* Prepend the directory name. */ | |
| end_offset = end - dp->d_name; | |
| buf_len = dir_len + 1+ end_offset; | |
| buf = LT_EMALLOC (char, 1+ buf_len); | |
| if (!buf) | |
| return ++errors; | |
| assert (buf); | |
| strcpy (buf, dirnam); | |
| strcat (buf, "/"); | |
| strncat (buf, dp->d_name, end_offset); | |
| buf[buf_len] = LT_EOS_CHAR; | |
| /* Try to insert (in order) into ARGZ/ARGZ_LEN. */ | |
| if (lt_argz_insertinorder (pargz, pargz_len, buf) != 0) | |
| ++errors; | |
| LT_DLFREE (buf); | |
| return errors; | |
| } | } |
| static int | static int |
| presym_open (handle, filename) | list_files_by_dir (dirnam, pargz, pargz_len) |
| lt_dlhandle handle; | const char *dirnam; |
| const char *filename; | char **pargz; |
| { | size_t *pargz_len; |
| lt_dlsymlists_t *lists = preloaded_symbols; | { |
| DIR *dirp = NULL; | |
| if (!lists) { | int errors = 0; |
| last_error = no_symbols_error; | |
| return 1; | assert (dirnam && *dirnam); |
| } | assert (pargz); |
| if (!filename) | assert (pargz_len); |
| filename = "@PROGRAM@"; | assert (dirnam[LT_STRLEN(dirnam) -1] != '/'); |
| while (lists) { | |
| const lt_dlsymlist *syms = lists->syms; | dirp = opendir (dirnam); |
| if (dirp) | |
| while (syms->name) { | { |
| if (!syms->address && | struct dirent *dp = NULL; |
| strcmp(syms->name, filename) == 0) { | |
| handle->handle = (lt_ptr_t) syms; | while ((dp = readdir (dirp))) |
| return 0; | if (dp->d_name[0] != '.') |
| } | if (lt_argz_insertdir (pargz, pargz_len, dirnam, dp)) |
| syms++; | { |
| } | ++errors; |
| lists = lists->next; | break; |
| } | } |
| last_error = file_not_found_error; | |
| return 1; | closedir (dirp); |
| } | |
| else | |
| ++errors; | |
| return errors; | |
| } | } |
| /* If there are any files in DIRNAME, call the function passed in | |
| DATA1 (with the name of each file and DATA2 as arguments). */ | |
| static int | static int |
| presym_close (handle) | foreachfile_callback (dirname, data1, data2) |
| lt_dlhandle handle; | char *dirname; |
| lt_ptr data1; | |
| lt_ptr data2; | |
| { | { |
| /* Just to silence gcc -Wall */ | int (*func) LT_PARAMS((const char *filename, lt_ptr data)) |
| handle = 0; | = (int (*) LT_PARAMS((const char *filename, lt_ptr data))) data1; |
| return 0; | |
| } | |
| static lt_ptr_t | int is_done = 0; |
| presym_sym (handle, symbol) | char *argz = NULL; |
| lt_dlhandle handle; | size_t argz_len = 0; |
| const char *symbol; | |
| { | if (list_files_by_dir (dirname, &argz, &argz_len) != 0) |
| lt_dlsymlist *syms = (lt_dlsymlist*)(handle->handle); | goto cleanup; |
| if (!argz) | |
| syms++; | goto cleanup; |
| while (syms->address) { | |
| if (strcmp(syms->name, symbol) == 0) | |
| return syms->address; | |
| syms++; | |
| } | |
| last_error = symbol_error; | |
| return 0; | |
| } | |
| static | { |
| lt_dltype_t | char *filename = NULL; |
| presym = { LTDL_TYPE_TOP, 0, presym_init, presym_exit, | while ((filename = argz_next (argz, argz_len, filename))) |
| presym_open, presym_close, presym_sym }; | if ((is_done = (*func) (filename, data2))) |
| break; | |
| #undef LTDL_TYPE_TOP | } |
| #define LTDL_TYPE_TOP &presym | |
| static char *user_search_path = 0; | |
| static lt_dlhandle handles = 0; | |
| static int initialized = 0; | |
| static lt_dltype_t *types = LTDL_TYPE_TOP; | cleanup: |
| #undef LTDL_TYPE_TOP | LT_DLFREE (argz); |
| return is_done; | |
| } | |
| /* Call FUNC for each unique extensionless file in SEARCH_PATH, along | |
| with DATA. The filenames passed to FUNC would be suitable for | |
| passing to lt_dlopenext. The extensions are stripped so that | |
| individual modules do not generate several entries (e.g. libfoo.la, | |
| libfoo.so, libfoo.so.1, libfoo.so.1.0.0). If SEARCH_PATH is NULL, | |
| then the same directories that lt_dlopen would search are examined. */ | |
| int | int |
| lt_dlinit LTDL_PARAMS((void)) | lt_dlforeachfile (search_path, func, data) |
| { | const char *search_path; |
| /* initialize libltdl */ | int (*func) LT_PARAMS ((const char *filename, lt_ptr data)); |
| lt_dltype_t **type = &types; | lt_ptr data; |
| int typecount = 0; | { |
| int is_done = 0; | |
| if (initialized) { /* Initialize only at first call. */ | |
| initialized++; | if (search_path) |
| return 0; | { |
| } | /* If a specific path was passed, search only the directories |
| handles = 0; | listed in it. */ |
| user_search_path = 0; /* empty search path */ | is_done = foreach_dirinpath (search_path, 0, |
| foreachfile_callback, func, data); | |
| while (*type) { | } |
| if ((*type)->mod_init()) | else |
| *type = (*type)->next; /* Remove it from the list */ | { |
| else { | /* Otherwise search the default paths. */ |
| type = &(*type)->next; /* Keep it */ | is_done = foreach_dirinpath (user_search_path, 0, |
| typecount++; | foreachfile_callback, func, data); |
| } | if (!is_done) |
| { | |
| is_done = foreach_dirinpath (getenv("LTDL_LIBRARY_PATH"), 0, | |
| foreachfile_callback, func, data); | |
| } | } |
| if (typecount == 0) { | |
| last_error = dlopen_not_supported_error; | #ifdef LTDL_SHLIBPATH_VAR |
| return 1; | if (!is_done) |
| { | |
| is_done = foreach_dirinpath (getenv(LTDL_SHLIBPATH_VAR), 0, | |
| foreachfile_callback, func, data); | |
| } | } |
| last_error = 0; | #endif |
| initialized = 1; | #ifdef LTDL_SYSSEARCHPATH |
| return 0; | if (!is_done) |
| { | |
| is_done = foreach_dirinpath (getenv(LTDL_SYSSEARCHPATH), 0, | |
| foreachfile_callback, func, data); | |
| } | |
| #endif | |
| } | |
| return is_done; | |
| } | } |
| int | int |
| lt_dlpreload (preloaded) | lt_dlclose (handle) |
| const lt_dlsymlist *preloaded; | lt_dlhandle handle; |
| { | { |
| if (preloaded) | lt_dlhandle cur, last; |
| return presym_add_symlist(preloaded); | int errors = 0; |
| presym_free_symlists(); | |
| if (default_preloaded_symbols) | LT_DLMUTEX_LOCK (); |
| return lt_dlpreload(default_preloaded_symbols); | |
| return 0; | /* check whether the handle is valid */ |
| last = cur = handles; | |
| while (cur && handle != cur) | |
| { | |
| last = cur; | |
| cur = cur->next; | |
| } | |
| if (!cur) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); | |
| ++errors; | |
| goto done; | |
| } | |
| handle->info.ref_count--; | |
| /* Note that even with resident modules, we must track the ref_count | |
| correctly incase the user decides to reset the residency flag | |
| later (even though the API makes no provision for that at the | |
| moment). */ | |
| if (handle->info.ref_count <= 0 && !LT_DLIS_RESIDENT (handle)) | |
| { | |
| lt_user_data data = handle->loader->dlloader_data; | |
| if (handle != handles) | |
| { | |
| last->next = handle->next; | |
| } | |
| else | |
| { | |
| handles = handle->next; | |
| } | |
| errors += handle->loader->module_close (data, handle->module); | |
| errors += unload_deplibs(handle); | |
| /* It is up to the callers to free the data itself. */ | |
| LT_DLFREE (handle->caller_data); | |
| LT_DLFREE (handle->info.filename); | |
| LT_DLFREE (handle->info.name); | |
| LT_DLFREE (handle); | |
| goto done; | |
| } | |
| if (LT_DLIS_RESIDENT (handle)) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (CLOSE_RESIDENT_MODULE)); | |
| ++errors; | |
| } | |
| done: | |
| LT_DLMUTEX_UNLOCK (); | |
| return errors; | |
| } | } |
| int | lt_ptr |
| lt_dlpreload_default (preloaded) | lt_dlsym (handle, symbol) |
| const lt_dlsymlist *preloaded; | lt_dlhandle handle; |
| const char *symbol; | |
| { | { |
| default_preloaded_symbols = preloaded; | size_t lensym; |
| return 0; | char lsym[LT_SYMBOL_LENGTH]; |
| char *sym; | |
| lt_ptr address; | |
| lt_user_data data; | |
| if (!handle) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); | |
| return 0; | |
| } | |
| if (!symbol) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (SYMBOL_NOT_FOUND)); | |
| return 0; | |
| } | |
| lensym = LT_STRLEN (symbol) + LT_STRLEN (handle->loader->sym_prefix) | |
| + LT_STRLEN (handle->info.name); | |
| if (lensym + LT_SYMBOL_OVERHEAD < LT_SYMBOL_LENGTH) | |
| { | |
| sym = lsym; | |
| } | |
| else | |
| { | |
| sym = LT_EMALLOC (char, lensym + LT_SYMBOL_OVERHEAD + 1); | |
| if (!sym) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (BUFFER_OVERFLOW)); | |
| return 0; | |
| } | |
| } | |
| data = handle->loader->dlloader_data; | |
| if (handle->info.name) | |
| { | |
| const char *saved_error; | |
| LT_DLMUTEX_GETERROR (saved_error); | |
| /* this is a libtool module */ | |
| if (handle->loader->sym_prefix) | |
| { | |
| strcpy(sym, handle->loader->sym_prefix); | |
| strcat(sym, handle->info.name); | |
| } | |
| else | |
| { | |
| strcpy(sym, handle->info.name); | |
| } | |
| strcat(sym, "_LTX_"); | |
| strcat(sym, symbol); | |
| /* try "modulename_LTX_symbol" */ | |
| address = handle->loader->find_sym (data, handle->module, sym); | |
| if (address) | |
| { | |
| if (sym != lsym) | |
| { | |
| LT_DLFREE (sym); | |
| } | |
| return address; | |
| } | |
| LT_DLMUTEX_SETERROR (saved_error); | |
| } | |
| /* otherwise try "symbol" */ | |
| if (handle->loader->sym_prefix) | |
| { | |
| strcpy(sym, handle->loader->sym_prefix); | |
| strcat(sym, symbol); | |
| } | |
| else | |
| { | |
| strcpy(sym, symbol); | |
| } | |
| address = handle->loader->find_sym (data, handle->module, sym); | |
| if (sym != lsym) | |
| { | |
| LT_DLFREE (sym); | |
| } | |
| return address; | |
| } | } |
| int | const char * |
| lt_dlexit LTDL_PARAMS((void)) | lt_dlerror () |
| { | { |
| /* shut down libltdl */ | const char *error; |
| lt_dltype_t *type = types; | |
| int errors; | LT_DLMUTEX_GETERROR (error); |
| LT_DLMUTEX_SETERROR (0); | |
| if (!initialized) { | |
| last_error = shutdown_error; | return error ? error : LT_DLSTRERROR (UNKNOWN); |
| return 1; | |
| } | |
| if (initialized != 1) { /* shut down only at last call. */ | |
| initialized--; | |
| return 0; | |
| } | |
| /* close all modules */ | |
| errors = 0; | |
| while (handles) { | |
| /* FIXME: what if a module depends on another one? */ | |
| if (lt_dlclose(handles)) | |
| errors++; | |
| } | |
| initialized = 0; | |
| while (type) { | |
| if (type->mod_exit()) | |
| errors++; | |
| type = type->next; | |
| } | |
| return errors; | |
| } | } |
| static int | static int |
| tryall_dlopen (handle, filename) | lt_dlpath_insertdir (ppath, before, dir) |
| lt_dlhandle *handle; | char **ppath; |
| const char *filename; | char *before; |
| const char *dir; | |
| { | { |
| lt_dlhandle cur; | int errors = 0; |
| lt_dltype_t *type = types; | char *canonical = NULL; |
| const char *saved_error = last_error; | char *argz = NULL; |
| size_t argz_len = 0; | |
| /* check whether the module was already opened */ | |
| cur = handles; | assert (ppath); |
| while (cur) { | assert (dir && *dir); |
| if (!cur->filename && !filename) | |
| break; | if (canonicalize_path (dir, &canonical) != 0) |
| if (cur->filename && filename && | { |
| strcmp(cur->filename, filename) == 0) | ++errors; |
| break; | goto cleanup; |
| cur = cur->next; | } |
| } | |
| if (cur) { | assert (canonical && *canonical); |
| cur->usage++; | |
| *handle = cur; | /* If *PPATH is empty, set it to DIR. */ |
| return 0; | if (*ppath == NULL) |
| } | { |
| assert (!before); /* BEFORE cannot be set without PPATH. */ | |
| cur = *handle; | assert (dir); /* Without DIR, don't call this function! */ |
| if (filename) { | |
| cur->filename = strdup(filename); | *ppath = lt_estrdup (dir); |
| if (!cur->filename) { | if (*ppath == NULL) |
| last_error = memory_error; | ++errors; |
| return 1; | |
| } | return errors; |
| } else | } |
| cur->filename = 0; | |
| while (type) { | assert (ppath && *ppath); |
| if (type->lib_open(cur, filename) == 0) | |
| break; | if (argzize_path (*ppath, &argz, &argz_len) != 0) |
| type = type->next; | { |
| } | ++errors; |
| if (!type) { | goto cleanup; |
| if (cur->filename) | } |
| lt_dlfree(cur->filename); | |
| return 1; | /* Convert BEFORE into an equivalent offset into ARGZ. This only works |
| } | if *PPATH is already canonicalized, and hence does not change length |
| cur->type = type; | with respect to ARGZ. We canonicalize each entry as it is added to |
| last_error = saved_error; | the search path, and don't call this function with (uncanonicalized) |
| return 0; | user paths, so this is a fair assumption. */ |
| if (before) | |
| { | |
| assert (*ppath <= before); | |
| assert (before - *ppath <= strlen (*ppath)); | |
| before = before - *ppath + argz; | |
| } | |
| if (lt_argz_insert (&argz, &argz_len, before, dir) != 0) | |
| { | |
| ++errors; | |
| goto cleanup; | |
| } | |
| argz_stringify (argz, argz_len, LT_PATHSEP_CHAR); | |
| LT_DLMEM_REASSIGN (*ppath, argz); | |
| cleanup: | |
| LT_DLFREE (canonical); | |
| LT_DLFREE (argz); | |
| return errors; | |
| } | } |
| static int | int |
| find_module (handle, dir, libdir, dlname, old_name, installed) | lt_dladdsearchdir (search_dir) |
| lt_dlhandle *handle; | const char *search_dir; |
| const char *dir; | { |
| const char *libdir; | int errors = 0; |
| const char *dlname; | |
| const char *old_name; | if (search_dir && *search_dir) |
| int installed; | { |
| { | LT_DLMUTEX_LOCK (); |
| int error; | if (lt_dlpath_insertdir (&user_search_path, 0, search_dir) != 0) |
| char *filename; | ++errors; |
| /* try to open the old library first; if it was dlpreopened, | LT_DLMUTEX_UNLOCK (); |
| we want the preopened version of it, even if a dlopenable | } |
| module is available */ | |
| if (old_name && tryall_dlopen(handle, old_name) == 0) | return errors; |
| return 0; | |
| /* try to open the dynamic library */ | |
| if (dlname) { | |
| /* try to open the installed module */ | |
| if (installed && libdir) { | |
| filename = (char*) | |
| lt_dlmalloc(strlen(libdir)+1+strlen(dlname)+1); | |
| if (!filename) { | |
| last_error = memory_error; | |
| return 1; | |
| } | |
| strcpy(filename, libdir); | |
| strcat(filename, "/"); | |
| strcat(filename, dlname); | |
| error = tryall_dlopen(handle, filename) == 0; | |
| lt_dlfree(filename); | |
| if (error) | |
| return 0; | |
| } | |
| /* try to open the not-installed module */ | |
| if (!installed) { | |
| filename = (char*) | |
| lt_dlmalloc((dir ? strlen(dir) : 0) | |
| + strlen(objdir) + strlen(dlname) + 1); | |
| if (!filename) { | |
| last_error = memory_error; | |
| return 1; | |
| } | |
| if (dir) | |
| strcpy(filename, dir); | |
| else | |
| *filename = 0; | |
| strcat(filename, objdir); | |
| strcat(filename, dlname); | |
| error = tryall_dlopen(handle, filename) == 0; | |
| lt_dlfree(filename); | |
| if (error) | |
| return 0; | |
| } | |
| /* hmm, maybe it was moved to another directory */ | |
| { | |
| filename = (char*) | |
| lt_dlmalloc((dir ? strlen(dir) : 0) | |
| + strlen(dlname) + 1); | |
| if (dir) | |
| strcpy(filename, dir); | |
| else | |
| *filename = 0; | |
| strcat(filename, dlname); | |
| error = tryall_dlopen(handle, filename) == 0; | |
| lt_dlfree(filename); | |
| if (error) | |
| return 0; | |
| } | |
| } | |
| last_error = file_not_found_error; | |
| return 1; | |
| } | } |
| static lt_ptr_t | int |
| find_file (basename, search_path, pdir, handle) | lt_dlinsertsearchdir (before, search_dir) |
| const char *basename; | const char *before; |
| const char *search_path; | const char *search_dir; |
| char **pdir; | { |
| lt_dlhandle *handle; | int errors = 0; |
| { | |
| /* when handle != NULL search a library, otherwise a file */ | if (before) |
| /* return NULL on failure, otherwise the file/handle */ | { |
| LT_DLMUTEX_LOCK (); | |
| char *filename = 0; | if ((before < user_search_path) |
| int filenamesize = 0; | || (before >= user_search_path + LT_STRLEN (user_search_path))) |
| const char *next = search_path; | { |
| int lenbase = strlen(basename); | LT_DLMUTEX_UNLOCK (); |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_POSITION)); | |
| if (!next || !*next) { | return 1; |
| last_error = file_not_found_error; | } |
| return 0; | LT_DLMUTEX_UNLOCK (); |
| } | } |
| while (next) { | |
| int lendir; | if (search_dir && *search_dir) |
| const char *cur = next; | { |
| LT_DLMUTEX_LOCK (); | |
| next = strchr(cur, ':'); | if (lt_dlpath_insertdir (&user_search_path, |
| if (!next) | (char *) before, search_dir) != 0) |
| next = cur + strlen(cur); | { |
| lendir = next - cur; | ++errors; |
| if (*next == ':') | |
| ++next; | |
| else | |
| next = 0; | |
| if (lendir == 0) | |
| continue; | |
| if (lendir + 1 + lenbase >= filenamesize) { | |
| if (filename) | |
| lt_dlfree(filename); | |
| filenamesize = lendir + 1 + lenbase + 1; | |
| filename = (char*) lt_dlmalloc(filenamesize); | |
| if (!filename) { | |
| last_error = memory_error; | |
| return 0; | |
| } | |
| } | |
| strncpy(filename, cur, lendir); | |
| if (filename[lendir-1] != '/') | |
| filename[lendir++] = '/'; | |
| strcpy(filename+lendir, basename); | |
| if (handle) { | |
| if (tryall_dlopen(handle, filename) == 0) { | |
| lt_dlfree(filename); | |
| return (lt_ptr_t) handle; | |
| } | |
| } else { | |
| FILE *file = fopen(filename, LTDL_READTEXT_MODE); | |
| if (file) { | |
| if (*pdir) | |
| lt_dlfree(*pdir); | |
| filename[lendir] = '\0'; | |
| *pdir = strdup(filename); | |
| if (!*pdir) { | |
| /* We could have even avoided the | |
| strdup, but there would be some | |
| memory overhead. */ | |
| *pdir = filename; | |
| } else | |
| lt_dlfree(filename); | |
| return (lt_ptr_t) file; | |
| } | |
| } | |
| } | } |
| if (filename) | LT_DLMUTEX_UNLOCK (); |
| lt_dlfree(filename); | } |
| last_error = file_not_found_error; | |
| return 0; | return errors; |
| } | } |
| static int | int |
| load_deplibs(handle, deplibs) | lt_dlsetsearchpath (search_path) |
| lt_dlhandle handle; | const char *search_path; |
| const char *deplibs; | { |
| { | int errors = 0; |
| /* FIXME: load deplibs */ | |
| handle->depcount = 0; | LT_DLMUTEX_LOCK (); |
| handle->deplibs = 0; | LT_DLFREE (user_search_path); |
| /* Just to silence gcc -Wall */ | LT_DLMUTEX_UNLOCK (); |
| deplibs = 0; | |
| return 0; | if (!search_path || !LT_STRLEN (search_path)) |
| { | |
| return errors; | |
| } | |
| LT_DLMUTEX_LOCK (); | |
| if (canonicalize_path (search_path, &user_search_path) != 0) | |
| ++errors; | |
| LT_DLMUTEX_UNLOCK (); | |
| return errors; | |
| } | } |
| static int | const char * |
| unload_deplibs(handle) | lt_dlgetsearchpath () |
| lt_dlhandle handle; | |
| { | { |
| /* FIXME: unload deplibs */ | const char *saved_path; |
| /* Just to silence gcc -Wall */ | |
| handle = 0; | LT_DLMUTEX_LOCK (); |
| return 0; | saved_path = user_search_path; |
| LT_DLMUTEX_UNLOCK (); | |
| return saved_path; | |
| } | } |
| static inline int | int |
| trim (dest, str) | lt_dlmakeresident (handle) |
| char **dest; | lt_dlhandle handle; |
| const char *str; | |
| { | { |
| /* remove the leading and trailing "'" from str | int errors = 0; |
| and store the result in dest */ | |
| char *tmp; | if (!handle) |
| const char *end = strrchr(str, '\''); | { |
| int len = strlen(str); | LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); |
| ++errors; | |
| if (*dest) | } |
| lt_dlfree(*dest); | else |
| if (len > 3 && str[0] == '\'') { | { |
| tmp = (char*) lt_dlmalloc(end - str); | LT_DLSET_FLAG (handle, LT_DLRESIDENT_FLAG); |
| if (!tmp) { | } |
| last_error = memory_error; | |
| return 1; | return errors; |
| } | |
| strncpy(tmp, &str[1], (end - str) - 1); | |
| tmp[len-3] = '\0'; | |
| *dest = tmp; | |
| } else | |
| *dest = 0; | |
| return 0; | |
| } | } |
| static inline int | int |
| free_vars(dir, name, dlname, oldname, libdir, deplibs) | lt_dlisresident (handle) |
| char *dir; | lt_dlhandle handle; |
| char *name; | { |
| char *dlname; | if (!handle) |
| char *oldname; | { |
| char *libdir; | LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); |
| char *deplibs; | return -1; |
| { | } |
| if (dir) | |
| lt_dlfree(dir); | return LT_DLIS_RESIDENT (handle); |
| if (name) | |
| lt_dlfree(name); | |
| if (dlname) | |
| lt_dlfree(dlname); | |
| if (oldname) | |
| lt_dlfree(oldname); | |
| if (libdir) | |
| lt_dlfree(libdir); | |
| if (deplibs) | |
| lt_dlfree(deplibs); | |
| return 0; | |
| } | } |
| lt_dlhandle | |
| lt_dlopen (filename) | |
| const char *filename; | |
| /* --- MODULE INFORMATION --- */ | |
| const lt_dlinfo * | |
| lt_dlgetinfo (handle) | |
| lt_dlhandle handle; | |
| { | { |
| lt_dlhandle handle, newhandle; | if (!handle) |
| const char *basename, *ext; | { |
| const char *saved_error = last_error; | LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_HANDLE)); |
| char *dir = 0, *name = 0; | return 0; |
| } | |
| if (!filename) { | |
| handle = (lt_dlhandle) lt_dlmalloc(sizeof(lt_dlhandle_t)); | return &(handle->info); |
| if (!handle) { | |
| last_error = memory_error; | |
| return 0; | |
| } | |
| handle->usage = 0; | |
| handle->depcount = 0; | |
| handle->deplibs = 0; | |
| newhandle = handle; | |
| if (tryall_dlopen(&newhandle, 0) != 0) { | |
| lt_dlfree(handle); | |
| return 0; | |
| } | |
| goto register_handle; | |
| } | |
| basename = strrchr(filename, '/'); | |
| if (basename) { | |
| basename++; | |
| dir = (char*) lt_dlmalloc(basename - filename + 1); | |
| if (!dir) { | |
| last_error = memory_error; | |
| return 0; | |
| } | |
| strncpy(dir, filename, basename - filename); | |
| dir[basename - filename] = '\0'; | |
| } else | |
| basename = filename; | |
| /* check whether we open a libtool module (.la extension) */ | |
| ext = strrchr(basename, '.'); | |
| if (ext && strcmp(ext, ".la") == 0) { | |
| /* this seems to be a libtool module */ | |
| FILE *file; | |
| int i; | |
| char *dlname = 0, *old_name = 0; | |
| char *libdir = 0, *deplibs = 0; | |
| char *line; | |
| int error = 0; | |
| /* if we can't find the installed flag, it is probably an | |
| installed libtool archive, produced with an old version | |
| of libtool */ | |
| int installed = 1; | |
| /* extract the module name from the file name */ | |
| name = (char*) lt_dlmalloc(ext - basename + 1); | |
| if (!name) { | |
| last_error = memory_error; | |
| if (dir) | |
| lt_dlfree(dir); | |
| return 0; | |
| } | |
| /* canonicalize the module name */ | |
| for (i = 0; i < ext - basename; i++) | |
| if (isalnum((int)(basename[i]))) | |
| name[i] = basename[i]; | |
| else | |
| name[i] = '_'; | |
| name[ext - basename] = '\0'; | |
| /* now try to open the .la file */ | |
| file = fopen(filename, LTDL_READTEXT_MODE); | |
| if (!file) | |
| last_error = file_not_found_error; | |
| if (!file && !dir) { | |
| /* try other directories */ | |
| file = (FILE*) find_file(basename, | |
| user_search_path, | |
| &dir, 0); | |
| if (!file) | |
| file = (FILE*) find_file(basename, | |
| getenv("LTDL_LIBRARY_PATH"), | |
| &dir, 0); | |
| #ifdef LTDL_SHLIBPATH_VAR | |
| if (!file) | |
| file = (FILE*) find_file(basename, | |
| getenv(LTDL_SHLIBPATH_VAR), | |
| &dir, 0); | |
| #endif | |
| } | |
| if (!file) { | |
| if (name) | |
| lt_dlfree(name); | |
| if (dir) | |
| lt_dlfree(dir); | |
| return 0; | |
| } | |
| line = (char*) lt_dlmalloc(LTDL_FILENAME_MAX); | |
| if (!line) { | |
| fclose(file); | |
| last_error = memory_error; | |
| return 0; | |
| } | |
| /* read the .la file */ | |
| while (!feof(file)) { | |
| if (!fgets(line, LTDL_FILENAME_MAX, file)) | |
| break; | |
| if (line[0] == '\n' || line[0] == '#') | |
| continue; | |
| # undef STR_DLNAME | |
| # define STR_DLNAME "dlname=" | |
| if (strncmp(line, STR_DLNAME, | |
| sizeof(STR_DLNAME) - 1) == 0) | |
| error = trim(&dlname, | |
| &line[sizeof(STR_DLNAME) - 1]); | |
| else | |
| # undef STR_OLD_LIBRARY | |
| # define STR_OLD_LIBRARY "old_library=" | |
| if (strncmp(line, STR_OLD_LIBRARY, | |
| sizeof(STR_OLD_LIBRARY) - 1) == 0) | |
| error = trim(&old_name, | |
| &line[sizeof(STR_OLD_LIBRARY) - 1]); | |
| else | |
| # undef STR_LIBDIR | |
| # define STR_LIBDIR "libdir=" | |
| if (strncmp(line, STR_LIBDIR, | |
| sizeof(STR_LIBDIR) - 1) == 0) | |
| error = trim(&libdir, | |
| &line[sizeof(STR_LIBDIR) - 1]); | |
| else | |
| # undef STR_DL_DEPLIBS | |
| # define STR_DL_DEPLIBS "dl_dependency_libs=" | |
| if (strncmp(line, STR_DL_DEPLIBS, | |
| sizeof(STR_DL_DEPLIBS) - 1) == 0) | |
| error = trim(&deplibs, | |
| &line[sizeof(STR_DL_DEPLIBS) - 1]); | |
| else | |
| if (strcmp(line, "installed=yes\n") == 0) | |
| installed = 1; | |
| else | |
| if (strcmp(line, "installed=no\n") == 0) | |
| installed = 0; | |
| if (error) | |
| break; | |
| } | |
| fclose(file); | |
| lt_dlfree(line); | |
| /* allocate the handle */ | |
| handle = (lt_dlhandle) lt_dlmalloc(sizeof(lt_dlhandle_t)); | |
| if (!handle || error) { | |
| if (handle) | |
| lt_dlfree(handle); | |
| if (!error) | |
| last_error = memory_error; | |
| free_vars(name, dir, dlname, old_name, libdir, deplibs); | |
| return 0; | |
| } | |
| handle->usage = 0; | |
| if (load_deplibs(handle, deplibs) == 0) { | |
| newhandle = handle; | |
| /* find_module may replace newhandle */ | |
| if (find_module(&newhandle, dir, libdir, | |
| dlname, old_name, installed)) { | |
| unload_deplibs(handle); | |
| error = 1; | |
| } | |
| } else | |
| error = 1; | |
| if (error) { | |
| lt_dlfree(handle); | |
| free_vars(name, dir, dlname, old_name, libdir, deplibs); | |
| return 0; | |
| } | |
| if (handle != newhandle) { | |
| unload_deplibs(handle); | |
| } | |
| } else { | |
| /* not a libtool module */ | |
| handle = (lt_dlhandle) lt_dlmalloc(sizeof(lt_dlhandle_t)); | |
| if (!handle) { | |
| last_error = memory_error; | |
| if (dir) | |
| lt_dlfree(dir); | |
| return 0; | |
| } | |
| handle->usage = 0; | |
| /* non-libtool modules don't have dependencies */ | |
| handle->depcount = 0; | |
| handle->deplibs = 0; | |
| newhandle = handle; | |
| if (tryall_dlopen(&newhandle, filename) | |
| && (dir | |
| || (!find_file(basename, user_search_path, | |
| 0, &newhandle) | |
| && !find_file(basename, | |
| getenv("LTDL_LIBRARY_PATH"), | |
| 0, &newhandle) | |
| #ifdef LTDL_SHLIBPATH_VAR | |
| && !find_file(basename, | |
| getenv(LTDL_SHLIBPATH_VAR), | |
| 0, &newhandle) | |
| #endif | |
| ))) { | |
| lt_dlfree(handle); | |
| if (dir) | |
| lt_dlfree(dir); | |
| return 0; | |
| } | |
| } | |
| register_handle: | |
| if (newhandle != handle) { | |
| lt_dlfree(handle); | |
| handle = newhandle; | |
| } | |
| if (!handle->usage) { | |
| handle->usage = 1; | |
| handle->name = name; | |
| handle->next = handles; | |
| handles = handle; | |
| } else if (name) | |
| lt_dlfree(name); | |
| if (dir) | |
| lt_dlfree(dir); | |
| last_error = saved_error; | |
| return handle; | |
| } | } |
| lt_dlhandle | lt_dlhandle |
| lt_dlopenext (filename) | lt_dlhandle_next (place) |
| const char *filename; | lt_dlhandle place; |
| { | { |
| lt_dlhandle handle; | return place ? place->next : handles; |
| char *tmp; | |
| int len; | |
| const char *saved_error = last_error; | |
| if (!filename) | |
| return lt_dlopen(filename); | |
| len = strlen(filename); | |
| if (!len) { | |
| last_error = file_not_found_error; | |
| return 0; | |
| } | |
| /* try the normal file name */ | |
| handle = lt_dlopen(filename); | |
| if (handle) | |
| return handle; | |
| /* try "filename.la" */ | |
| tmp = (char*) lt_dlmalloc(len+4); | |
| if (!tmp) { | |
| last_error = memory_error; | |
| return 0; | |
| } | |
| strcpy(tmp, filename); | |
| strcat(tmp, ".la"); | |
| handle = lt_dlopen(tmp); | |
| if (handle) { | |
| last_error = saved_error; | |
| lt_dlfree(tmp); | |
| return handle; | |
| } | |
| #ifdef LTDL_SHLIB_EXT | |
| /* try "filename.EXT" */ | |
| if (strlen(shlib_ext) > 3) { | |
| lt_dlfree(tmp); | |
| tmp = (char*) lt_dlmalloc(len + strlen(shlib_ext) + 1); | |
| if (!tmp) { | |
| last_error = memory_error; | |
| return 0; | |
| } | |
| strcpy(tmp, filename); | |
| } else | |
| tmp[len] = '\0'; | |
| strcat(tmp, shlib_ext); | |
| handle = lt_dlopen(tmp); | |
| if (handle) { | |
| last_error = saved_error; | |
| lt_dlfree(tmp); | |
| return handle; | |
| } | |
| #endif | |
| last_error = file_not_found_error; | |
| lt_dlfree(tmp); | |
| return 0; | |
| } | } |
| int | int |
| lt_dlclose (handle) | lt_dlforeach (func, data) |
| lt_dlhandle handle; | int (*func) LT_PARAMS((lt_dlhandle handle, lt_ptr data)); |
| lt_ptr data; | |
| { | { |
| lt_dlhandle cur, last; | int errors = 0; |
| lt_dlhandle cur; | |
| /* check whether the handle is valid */ | |
| last = cur = handles; | LT_DLMUTEX_LOCK (); |
| while (cur && handle != cur) { | |
| last = cur; | cur = handles; |
| cur = cur->next; | while (cur) |
| } | { |
| if (!cur) { | lt_dlhandle tmp = cur; |
| last_error = invalid_handle_error; | |
| return 1; | cur = cur->next; |
| } | if ((*func) (tmp, data)) |
| handle->usage--; | { |
| if (!handle->usage) { | ++errors; |
| int error; | break; |
| if (handle != handles) | |
| last->next = handle->next; | |
| else | |
| handles = handle->next; | |
| error = handle->type->lib_close(handle); | |
| error += unload_deplibs(handle); | |
| if (handle->filename) | |
| lt_dlfree(handle->filename); | |
| if (handle->name) | |
| lt_dlfree(handle->name); | |
| lt_dlfree(handle); | |
| return error; | |
| } | } |
| return 0; | } |
| LT_DLMUTEX_UNLOCK (); | |
| return errors; | |
| } | } |
| lt_ptr_t | lt_dlcaller_id |
| lt_dlsym (handle, symbol) | lt_dlcaller_register () |
| lt_dlhandle handle; | |
| const char *symbol; | |
| { | { |
| int lensym; | static lt_dlcaller_id last_caller_id = 0; |
| char lsym[LTDL_SYMBOL_LENGTH]; | int result; |
| char *sym; | |
| lt_ptr_t address; | LT_DLMUTEX_LOCK (); |
| result = ++last_caller_id; | |
| if (!handle) { | LT_DLMUTEX_UNLOCK (); |
| last_error = invalid_handle_error; | |
| return 0; | return result; |
| } | } |
| if (!symbol) { | |
| last_error = symbol_error; | lt_ptr |
| return 0; | lt_dlcaller_set_data (key, handle, data) |
| } | lt_dlcaller_id key; |
| lensym = strlen(symbol); | lt_dlhandle handle; |
| if (handle->type->sym_prefix) | lt_ptr data; |
| lensym += strlen(handle->type->sym_prefix); | { |
| if (handle->name) | int n_elements = 0; |
| lensym += strlen(handle->name); | lt_ptr stale = NULL; |
| if (lensym + LTDL_SYMBOL_OVERHEAD < LTDL_SYMBOL_LENGTH) | int i; |
| sym = lsym; | |
| else | /* This needs to be locked so that the caller data can be updated |
| sym = (char*) lt_dlmalloc(lensym + LTDL_SYMBOL_OVERHEAD + 1); | simultaneously by different threads. */ |
| if (!sym) { | LT_DLMUTEX_LOCK (); |
| last_error = buffer_overflow_error; | |
| return 0; | if (handle->caller_data) |
| } | while (handle->caller_data[n_elements].key) |
| if (handle->name) { | ++n_elements; |
| const char *saved_error = last_error; | |
| for (i = 0; i < n_elements; ++i) | |
| /* this is a libtool module */ | { |
| if (handle->type->sym_prefix) { | if (handle->caller_data[i].key == key) |
| strcpy(sym, handle->type->sym_prefix); | { |
| strcat(sym, handle->name); | stale = handle->caller_data[i].data; |
| } else | break; |
| strcpy(sym, handle->name); | |
| strcat(sym, "_LTX_"); | |
| strcat(sym, symbol); | |
| /* try "modulename_LTX_symbol" */ | |
| address = handle->type->find_sym(handle, sym); | |
| if (address) { | |
| if (sym != lsym) | |
| lt_dlfree(sym); | |
| return address; | |
| } | |
| last_error = saved_error; | |
| } | } |
| /* otherwise try "symbol" */ | } |
| if (handle->type->sym_prefix) { | |
| strcpy(sym, handle->type->sym_prefix); | /* Ensure that there is enough room in this handle's caller_data |
| strcat(sym, symbol); | array to accept a new element (and an empty end marker). */ |
| } else | if (i == n_elements) |
| strcpy(sym, symbol); | { |
| address = handle->type->find_sym(handle, sym); | lt_caller_data *temp |
| if (sym != lsym) | = LT_DLREALLOC (lt_caller_data, handle->caller_data, 2+ n_elements); |
| lt_dlfree(sym); | |
| return address; | if (!temp) |
| { | |
| stale = NULL; | |
| goto done; | |
| } | |
| handle->caller_data = temp; | |
| /* We only need this if we needed to allocate a new caller_data. */ | |
| handle->caller_data[i].key = key; | |
| handle->caller_data[1+ i].key = 0; | |
| } | |
| handle->caller_data[i].data = data; | |
| done: | |
| LT_DLMUTEX_UNLOCK (); | |
| return stale; | |
| } | } |
| const char * | lt_ptr |
| lt_dlerror LTDL_PARAMS((void)) | lt_dlcaller_get_data (key, handle) |
| lt_dlcaller_id key; | |
| lt_dlhandle handle; | |
| { | { |
| const char *error = last_error; | lt_ptr result = (lt_ptr) 0; |
| last_error = 0; | /* This needs to be locked so that the caller data isn't updated by |
| return error; | another thread part way through this function. */ |
| LT_DLMUTEX_LOCK (); | |
| /* Locate the index of the element with a matching KEY. */ | |
| { | |
| int i; | |
| for (i = 0; handle->caller_data[i].key; ++i) | |
| { | |
| if (handle->caller_data[i].key == key) | |
| { | |
| result = handle->caller_data[i].data; | |
| break; | |
| } | |
| } | |
| } | |
| LT_DLMUTEX_UNLOCK (); | |
| return result; | |
| } | } |
| /* --- USER MODULE LOADER API --- */ | |
| int | int |
| lt_dladdsearchdir (search_dir) | lt_dlloader_add (place, dlloader, loader_name) |
| const char *search_dir; | lt_dlloader *place; |
| { | const struct lt_user_dlloader *dlloader; |
| if (!search_dir || !strlen(search_dir)) | const char *loader_name; |
| return 0; | { |
| if (!user_search_path) { | int errors = 0; |
| user_search_path = strdup(search_dir); | lt_dlloader *node = NULL, *ptr = NULL; |
| if (!user_search_path) { | |
| last_error = memory_error; | if ((dlloader == NULL) /* diagnose null parameters */ |
| return 1; | || (dlloader->module_open == NULL) |
| } | || (dlloader->module_close == NULL) |
| } else { | || (dlloader->find_sym == NULL)) |
| char *new_search_path = (char*) | { |
| lt_dlmalloc(strlen(user_search_path) + | LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); |
| strlen(search_dir) + 2); /* ':' + '\0' == 2 */ | return 1; |
| if (!new_search_path) { | } |
| last_error = memory_error; | |
| return 1; | /* Create a new dlloader node with copies of the user callbacks. */ |
| } | node = LT_EMALLOC (lt_dlloader, 1); |
| strcpy(new_search_path, user_search_path); | if (!node) |
| strcat(new_search_path, ":"); | return 1; |
| strcat(new_search_path, search_dir); | |
| lt_dlfree(user_search_path); | node->next = NULL; |
| user_search_path = new_search_path; | node->loader_name = loader_name; |
| node->sym_prefix = dlloader->sym_prefix; | |
| node->dlloader_exit = dlloader->dlloader_exit; | |
| node->module_open = dlloader->module_open; | |
| node->module_close = dlloader->module_close; | |
| node->find_sym = dlloader->find_sym; | |
| node->dlloader_data = dlloader->dlloader_data; | |
| LT_DLMUTEX_LOCK (); | |
| if (!loaders) | |
| { | |
| /* If there are no loaders, NODE becomes the list! */ | |
| loaders = node; | |
| } | |
| else if (!place) | |
| { | |
| /* If PLACE is not set, add NODE to the end of the | |
| LOADERS list. */ | |
| for (ptr = loaders; ptr->next; ptr = ptr->next) | |
| { | |
| /*NOWORK*/; | |
| } | |
| ptr->next = node; | |
| } | |
| else if (loaders == place) | |
| { | |
| /* If PLACE is the first loader, NODE goes first. */ | |
| node->next = place; | |
| loaders = node; | |
| } | |
| else | |
| { | |
| /* Find the node immediately preceding PLACE. */ | |
| for (ptr = loaders; ptr->next != place; ptr = ptr->next) | |
| { | |
| /*NOWORK*/; | |
| } | |
| if (ptr->next != place) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); | |
| ++errors; | |
| } | |
| else | |
| { | |
| /* Insert NODE between PTR and PLACE. */ | |
| node->next = place; | |
| ptr->next = node; | |
| } | } |
| return 0; | } |
| LT_DLMUTEX_UNLOCK (); | |
| return errors; | |
| } | } |
| int | int |
| lt_dlsetsearchpath (search_path) | lt_dlloader_remove (loader_name) |
| const char *search_path; | const char *loader_name; |
| { | { |
| if (user_search_path) | lt_dlloader *place = lt_dlloader_find (loader_name); |
| lt_dlfree(user_search_path); | lt_dlhandle handle; |
| user_search_path = 0; /* reset the search path */ | int errors = 0; |
| if (!search_path || !strlen(search_path)) | |
| return 0; | if (!place) |
| user_search_path = strdup(search_path); | { |
| if (!user_search_path) | LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); |
| return 1; | return 1; |
| return 0; | } |
| LT_DLMUTEX_LOCK (); | |
| /* Fail if there are any open modules which use this loader. */ | |
| for (handle = handles; handle; handle = handle->next) | |
| { | |
| if (handle->loader == place) | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (REMOVE_LOADER)); | |
| ++errors; | |
| goto done; | |
| } | |
| } | |
| if (place == loaders) | |
| { | |
| /* PLACE is the first loader in the list. */ | |
| loaders = loaders->next; | |
| } | |
| else | |
| { | |
| /* Find the loader before the one being removed. */ | |
| lt_dlloader *prev; | |
| for (prev = loaders; prev->next; prev = prev->next) | |
| { | |
| if (!strcmp (prev->next->loader_name, loader_name)) | |
| { | |
| break; | |
| } | |
| } | |
| place = prev->next; | |
| prev->next = prev->next->next; | |
| } | |
| if (place->dlloader_exit) | |
| { | |
| errors = place->dlloader_exit (place->dlloader_data); | |
| } | |
| LT_DLFREE (place); | |
| done: | |
| LT_DLMUTEX_UNLOCK (); | |
| return errors; | |
| } | |
| lt_dlloader * | |
| lt_dlloader_next (place) | |
| lt_dlloader *place; | |
| { | |
| lt_dlloader *next; | |
| LT_DLMUTEX_LOCK (); | |
| next = place ? place->next : loaders; | |
| LT_DLMUTEX_UNLOCK (); | |
| return next; | |
| } | } |
| const char * | const char * |
| lt_dlgetsearchpath LTDL_PARAMS((void)) | lt_dlloader_name (place) |
| lt_dlloader *place; | |
| { | { |
| return user_search_path; | const char *name = NULL; |
| if (place) | |
| { | |
| LT_DLMUTEX_LOCK (); | |
| name = place ? place->loader_name : 0; | |
| LT_DLMUTEX_UNLOCK (); | |
| } | |
| else | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); | |
| } | |
| return name; | |
| } | |
| lt_user_data * | |
| lt_dlloader_data (place) | |
| lt_dlloader *place; | |
| { | |
| lt_user_data *data = NULL; | |
| if (place) | |
| { | |
| LT_DLMUTEX_LOCK (); | |
| data = place ? &(place->dlloader_data) : 0; | |
| LT_DLMUTEX_UNLOCK (); | |
| } | |
| else | |
| { | |
| LT_DLMUTEX_SETERROR (LT_DLSTRERROR (INVALID_LOADER)); | |
| } | |
| return data; | |
| } | |
| lt_dlloader * | |
| lt_dlloader_find (loader_name) | |
| const char *loader_name; | |
| { | |
| lt_dlloader *place = NULL; | |
| LT_DLMUTEX_LOCK (); | |
| for (place = loaders; place; place = place->next) | |
| { | |
| if (strcmp (place->loader_name, loader_name) == 0) | |
| { | |
| break; | |
| } | |
| } | |
| LT_DLMUTEX_UNLOCK (); | |
| return place; | |
| } | } |