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| version 1.19.2.2, 2001/03/20 17:52:39 | version 1.143.2.17, 2003/02/06 15:33:16 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: commonly functions. | Parser: commonly functions. |
| Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com) | Copyright(c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | |
| Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf) | |
| $Id$ | |
| */ | */ |
| #ifdef HAVE_CONFIG_H | static const char* IDENT_COMMON_C="$Date$"; |
| # include "pa_config.h" | |
| #endif | |
| #include <fcntl.h> | |
| #include <sys/types.h> | |
| #include <sys/stat.h> | |
| #include <io.h> | |
| #include <stdio.h> | |
| #include <string.h> | |
| #include "pa_common.h" | #include "pa_common.h" |
| #include "pa_types.h" | |
| #include "pa_exception.h" | #include "pa_exception.h" |
| #include "pa_pool.h" | |
| #include "pa_globals.h" | |
| #include "pa_value.h" | |
| #include "pa_hash.h" | #include "pa_hash.h" |
| #include "pa_string.h" | #include "pa_vstring.h" |
| #include "pa_vint.h" | |
| #include "pa_globals.h" | |
| #ifdef WIN32 | #ifdef CYGWIN |
| #define _GNU_H_WINDOWS32_SOCKETS | |
| // for PASCAL | |
| #include <windows.h> | |
| // SOCKET | |
| typedef u_int SOCKET; | |
| int PASCAL closesocket(SOCKET); | |
| #else | |
| # if defined(WIN32) | |
| # include <windows.h> | |
| # else | |
| # define closesocket close | |
| # endif | |
| #endif | |
| int __vsnprintf(char *b, size_t s, const char *f, va_list l) { | // some maybe-undefined constants |
| int r=_vsnprintf(b, --s, f, l); | |
| b[s]=0; | |
| return r; | |
| } | |
| int __snprintf(char *b, size_t s, const char *f, ...) { | |
| va_list l; | |
| va_start(l, f); | |
| int r=__vsnprintf(b, s, f, l); | |
| va_end(l); | |
| return r; | |
| } | |
| #ifndef _O_TEXT | |
| # define _O_TEXT 0 | |
| #endif | |
| #ifndef _O_BINARY | |
| # define _O_BINARY 0 | |
| #endif | #endif |
| #ifdef HAVE_FTRUNCATE | |
| # define PA_O_TRUNC 0 | |
| #else | |
| # ifdef _O_TRUNC | |
| # define PA_O_TRUNC _O_TRUNC | |
| # else | |
| # error you must have either ftruncate function or _O_TRUNC bit declared | |
| # endif | |
| #endif | |
| #ifdef WIN32 | // locking constants |
| #ifdef HAVE_FLOCK | |
| static int lock_shared_blocking(int fd) { return flock(fd, LOCK_SH); } | |
| static int lock_exclusive_blocking(int fd) { return flock(fd, LOCK_EX); } | |
| static int lock_exclusive_nonblocking(int fd) { return flock(fd, LOCK_EX || LOCK_NB); } | |
| static int unlock(int fd) { return flock(fd, LOCK_UN); } | |
| #else | |
| #ifdef HAVE__LOCKING | |
| #define FLOCK(operation) lseek(fd, 0, SEEK_SET); return _locking(fd, operation, 1) | |
| static int lock_shared_blocking(int fd) { FLOCK(_LK_LOCK); } | |
| static int lock_exclusive_blocking(int fd) { FLOCK(_LK_LOCK); } | |
| static int lock_exclusive_nonblocking(int fd) { FLOCK(_LK_NBLCK); } | |
| static int unlock(int fd) { FLOCK(_LK_UNLCK); } | |
| #else | |
| #ifdef HAVE_FCNTL | |
| #define FLOCK(cmd, arg) struct flock ls={arg, SEEK_SET}; return fcntl(fd, cmd, &ls) | |
| static int lock_shared_blocking(int fd) { FLOCK(F_SETLKW, F_RDLCK); } | |
| static int lock_exclusive_blocking(int fd) { FLOCK(F_SETLKW, F_WRLCK); } | |
| static int lock_exclusive_nonblocking(int fd) { FLOCK(F_SETLK, F_RDLCK); } | |
| static int unlock(int fd) { FLOCK(F_SETLK, F_UNLCK); } | |
| #else | |
| #ifdef HAVE_LOCKF | |
| #define FLOCK(fd, operation) lseek(fd, 0, SEEK_SET); return lockf(fd, operation, 1) | |
| static int lock_shared_blocking(int fd) { FLOCK(F_LOCK); } // on intel solaris man doesn't have doc on shared blocking | |
| static int lock_exclusive_blocking(int fd) { FLOCK(F_LOCK); } | |
| static int lock_exclusive_nonblocking(int fd) { FLOCK(F_TLOCK); } | |
| static int unlock(int fd) { FLOCK(F_TLOCK); } | |
| #else | |
| #error unable to find file locking func | |
| #endif | |
| #endif | |
| #endif | |
| #endif | |
| // defines for globals | |
| #define FILE_STATUS_NAME "status" | |
| // globals | |
| StringPtr file_status_name(new String(FILE_STATUS_NAME)); | |
| // defines for statics | |
| #define HTTP_METHOD_NAME "method" | |
| #define HTTP_TIMEOUT_NAME "timeout" | |
| #define HTTP_HEADERS_NAME "headers" | |
| #define HTTP_ANY_STATUS_NAME "any-status" | |
| // statics | |
| static StringPtr http_method_name(new String(HTTP_METHOD_NAME)); | |
| static StringPtr http_timeout_name(new String(HTTP_TIMEOUT_NAME)); | |
| static StringPtr http_headers_name(new String(HTTP_HEADERS_NAME)); | |
| static StringPtr http_any_status_name(new String(HTTP_ANY_STATUS_NAME)); | |
| // defines | |
| void flock(int fd, int operation) { | #define DEFAULT_USER_AGENT "parser3" |
| lseek(fd, 0, SEEK_SET); | |
| while(_locking(fd, operation, 1)!=0); | // functions |
| lseek(fd, 0, SEEK_SET); | |
| void fix_line_breaks(char* buf, size_t& size) { | |
| if(size==0) | |
| return; | |
| //_asm int 3; | |
| const char* const eob=buf+size; | |
| char* dest=buf; | |
| // fix DOS: \r\n -> \n | |
| // fix Macintosh: \r -> \n | |
| char* bol=buf; | |
| while(char* eol=(char*)memchr(bol, '\r', eob -bol)) { | |
| size_t len=eol-bol; | |
| if(dest!=bol) | |
| memcpy(dest, bol, len); | |
| dest+=len; | |
| *dest++='\n'; | |
| if(&eol[1]<eob && eol[1]=='\n') { // \r, \n = DOS | |
| bol=eol+2; | |
| size--; | |
| } else // \r, not \n = Macintosh | |
| bol=eol+1; | |
| } | |
| // last piece without \r, including terminating 0 | |
| if(dest!=bol) | |
| memcpy(dest, bol, eob-bol); | |
| } | |
| char* file_read_text(Pool& pool, Charset& charset, | |
| StringPtr file_spec, | |
| bool fail_on_read_problem, | |
| HashStringValue* params/*, HashStringValuePtr* out_fields*/) { | |
| char *result; size_t size; | |
| File_read_result file_read_result=file_read(pool, charset, file_spec, result, size, true, params, fail_on_read_problem); | |
| /* | |
| // they asked to return out_fields | |
| if(out_fields) | |
| *out_fields=file_read_result.fields; | |
| */ | |
| return file_read_result.success?result:0; | |
| } | |
| //http request stuff | |
| /* ************************ http stuff *********************** */ | |
| static bool set_addr(struct sockaddr_in *addr, const char* host, const short port){ | |
| memset(addr, 0, sizeof(*addr)); | |
| addr->sin_family=AF_INET; | |
| addr->sin_port=htons(port); | |
| if(host) { | |
| if(struct hostent *hostIP=gethostbyname(host)) | |
| memcpy(&addr->sin_addr, hostIP->h_addr, hostIP->h_length); | |
| else | |
| return false; | |
| } else | |
| addr->sin_addr.s_addr=INADDR_ANY; | |
| return true; | |
| } | } |
| static int http_read_response(Pool& pool, String& response, int sock, bool fail_on_status_ne_200){ | |
| int result=0; | |
| ssize_t EOLat=0; | |
| while(true) { | |
| char *buf=(char *)pool.malloc(MAX_STRING); | |
| ssize_t size=recv(sock, buf, MAX_STRING, 0); | |
| if(size<=0) | |
| break; | |
| response.APPEND_TAINTED(buf, size, "remote HTTP server response", 0); | |
| if(!result && (EOLat=response.pos("\r\n", 2))>=0) { // checking status in first response | |
| StringPtr status_line=response.mid(0, (size_t)EOLat); | |
| ArrayString astatus; | |
| status_line->split(astatus, 0, " ", 1); | |
| StringPtr status_code=astatus.get(1); | |
| result=status_code->as_int(); | |
| if(fail_on_status_ne_200 && result!=200) | |
| throw Exception("http.status", | |
| status_code, | |
| "invalid HTTP response status"); | |
| } | |
| } | |
| if(result) | |
| return result; | |
| else | |
| throw Exception("http.response", | |
| Exception::undefined_source, | |
| "bad response from host - no status found (size=%lu)", response.size()); | |
| } | |
| /* ********************** request *************************** */ | |
| #if defined(SIGALRM) && defined(HAVE_SIGSETJMP) && defined(HAVE_SIGLONGJMP) | |
| # define WE_CAN_USE_ALARM | |
| #endif | #endif |
| /// @todo define it | #ifdef WE_CAN_USE_ALARM |
| //\#ifdef SUN | static sigjmp_buf timeout_env; |
| #ifndef WIN32 | static void timeout_handler(int sig){ |
| siglongjmp(timeout_env, 1); | |
| } | |
| #endif | |
| void flock(int fd, int operation) { | static int http_request(Pool& pool, |
| lseek(fd, 0, SEEK_SET); | String& response, |
| lockf(fd, operation, 1); | StringPtr origin_string, |
| lseek(fd, 0, SEEK_SET); | const char* host, int port, |
| const char* request, | |
| int timeout, | |
| bool fail_on_status_ne_200) { | |
| if(!host) | |
| throw Exception("http.host", | |
| origin_string, | |
| "zero hostname"); //never | |
| #ifdef WE_CAN_USE_ALARM | |
| signal(SIGALRM, timeout_handler); | |
| #endif | |
| int sock=-1; | |
| try { | |
| int result; | |
| #ifdef WE_CAN_USE_ALARM | |
| if(sigsetjmp(timeout_env, 1)) | |
| throw Exception("http.timeout", | |
| origin_string, | |
| "timeout occured while retrieving document"); | |
| else { | |
| alarm(timeout); | |
| #endif | |
| struct sockaddr_in dest; | |
| if(!set_addr(&dest, host, port)) | |
| throw Exception("http.host", | |
| origin_string, | |
| "can not resolve hostname \"%s\"", host); | |
| if((sock=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP/*0*/))<0) | |
| throw Exception("http.connect", | |
| origin_string, | |
| "can not make socket: %s (%d)", strerror(errno), errno); | |
| if(connect(sock, (struct sockaddr *)&dest, sizeof(dest))) | |
| throw Exception("http.connect", | |
| origin_string, | |
| "can not connect to host \"%s\": %s (%d)", host, strerror(errno), errno); | |
| size_t request_size=strlen(request); | |
| if(send(sock, request, request_size, 0)!=(ssize_t)request_size) | |
| throw Exception("http.connect", | |
| origin_string, | |
| "error sending request: %s (%d)", strerror(errno), errno); | |
| result=http_read_response(pool, response, sock, fail_on_status_ne_200); | |
| closesocket(sock); | |
| #ifdef WE_CAN_USE_ALARM | |
| alarm(0); | |
| } | |
| #endif | |
| return result; | |
| } catch(...) { | |
| if(sock>=0) | |
| closesocket(sock); | |
| #ifdef WE_CAN_USE_ALARM | |
| alarm(0); | |
| #endif | |
| rethrow; | |
| } | |
| } | } |
| #ifndef DOXYGEN | |
| struct Http_pass_header_info { | |
| Pool* pool; | |
| Charset* charset; | |
| String* request; | |
| bool user_agent_specified; | |
| }; | |
| #endif | #endif |
| static void http_pass_header(HashStringValue::key_type key, HashStringValue::value_type value, | |
| Http_pass_header_info *info) { | |
| *(info->request)<<*key<<": " | |
| << *attributed_meaning_to_string(*info->pool, value, String::UL_HTTP_HEADER, false) | |
| <<"\n"; | |
| if(*key->change_case(*info->pool, *info->charset, String::CC_UPPER)=="USER-AGENT") | |
| info->user_agent_specified=true; | |
| } | |
| #ifndef DOXYGEN | |
| struct File_read_http_info { | |
| char **data; size_t *data_size; | |
| HashStringValuePtr headers; | |
| }; | |
| #endif | |
| static File_read_http_info file_read_http(Pool& pool, Charset& charset, StringPtr file_spec, | |
| HashStringValue *options=0) { | |
| File_read_http_info result; | |
| char host[MAX_STRING]; | |
| const char* uri; | |
| int port; | |
| CharPtr method(0); | |
| int timeout=2; | |
| bool fail_on_status_ne_200=true; | |
| ValuePtr vheaders(0); | |
| StringPtr connect_string(new String()); | |
| // not in ^sql{... UL_SQL ...} spirit, but closer to ^file::load one | |
| connect_string->append(*file_spec, String::UL_URI); // tainted pieces -> URI pieces | |
| CharPtr connect_string_cstr=connect_string->cstr(String::UL_UNSPECIFIED); | |
| const char* current=connect_string_cstr; | |
| if(strncmp(current, "http://", 7)!=0) | |
| throw Exception(0, | |
| connect_string, | |
| "does not start with http://"); //never | |
| current+=7; | |
| strncpy(host, current, sizeof(host)-1); host[sizeof(host)-1]=0; | |
| char* host_uri=lsplit(host, '/'); | |
| uri=host_uri?current+(host_uri-1-host):"/"; | |
| char* port_cstr=lsplit(host, ':'); | |
| char* error_pos=0; | |
| port=port_cstr?strtol(port_cstr, &error_pos, 0):80; | |
| if(options) { | |
| int valid_options=0; | |
| if(ValuePtr vmethod=options->get(http_method_name)) { | |
| valid_options++; | |
| method=vmethod->as_string(&pool)->cstr(); | |
| } | |
| if(ValuePtr vtimeout=options->get(http_timeout_name)) { | |
| valid_options++; | |
| timeout=vtimeout->as_int(); | |
| } | |
| if(vheaders=options->get(http_headers_name)) { | |
| valid_options++; | |
| } | |
| if(ValuePtr vany_status=options->get(http_any_status_name)) { | |
| valid_options++; | |
| fail_on_status_ne_200=!vany_status->as_bool(); | |
| } | |
| void lock(FILE *f, long position) { | if(valid_options!=options->count()) |
| flock(fileno(f), LOCK_EX); | throw Exception("parser.runtime", |
| Exception::undefined_source, | |
| "invalid option passed"); | |
| } | |
| //making request | |
| String request; | |
| if(method) | |
| request<<method; | |
| else | |
| request<<"GET"; | |
| request<< " "<< uri <<" HTTP/1.0\nHost: "<< host<<"\n"; | |
| bool user_agent_specified=false; | |
| if(vheaders && !vheaders->is_string()) { // allow empty | |
| if(HashStringValue *headers=vheaders->get_hash(connect_string)) { | |
| Http_pass_header_info info={&pool, &charset, &request}; | |
| headers->for_each(http_pass_header, &info); | |
| user_agent_specified=info.user_agent_specified; | |
| } else | |
| throw Exception("parser.runtime", | |
| connect_string, | |
| "headers param must be hash"); | |
| }; | |
| if(!user_agent_specified) // defaulting | |
| request << "user-agent: " DEFAULT_USER_AGENT "\n"; | |
| request<<"\n"; | |
| //sending request | |
| String response; | |
| CharPtr request_cstr=request.cstr(String::UL_UNSPECIFIED); | |
| int status_code=http_request(pool, response, | |
| connect_string, host, port, request_cstr, | |
| timeout, fail_on_status_ne_200); | |
| //processing results | |
| int pos=response.pos("\r\n\r\n", 4); | |
| if(pos<1){ | |
| throw Exception("http.response", | |
| connect_string, | |
| "bad response from host - no headers found"); | |
| } | |
| StringPtr header_block=response.mid(0, pos); | |
| StringPtr body=response.mid(pos+4, response.size()); | |
| ArrayString aheaders; | |
| result.headers=HashStringValuePtr(new HashStringValue); | |
| header_block->split(aheaders, 0, "\r\n", 2); | |
| //processing headers | |
| for(int i=1; i<aheaders.count(); i++) { | |
| StringPtr line=aheaders.get(i); | |
| pos=line->pos(": ", 2); | |
| if(pos<1) | |
| throw Exception("http.response", | |
| connect_string, | |
| "bad response from host - bad header \"%s\"", line->cstr().get()); | |
| result.headers->put( | |
| line->mid(0, pos)->change_case(pool, charset, String::CC_UPPER), | |
| ValuePtr(new VString(line->mid(pos+2, line->size())))); | |
| } | |
| // output response | |
| *result.data=new(pool) char[*result.data_size=body->size()]; | |
| body->store_to(*result.data, String::UL_AS_IS); | |
| result.headers->put(file_status_name, ValuePtr(new VInt(status_code))); | |
| return result; | |
| } | } |
| void unlock(FILE *f) { | |
| flock(fileno(f), LOCK_UN); | #ifndef DOXYGEN |
| struct File_read_action_info { | |
| char **data; size_t *data_size; | |
| }; | |
| #endif | |
| static void file_read_action(Pool& pool, | |
| struct stat& finfo, | |
| int f, | |
| StringPtr file_spec, const char* fname, bool as_text, | |
| void *context) { | |
| File_read_action_info& info=*static_cast<File_read_action_info *>(context); | |
| if(size_t to_read_size=(size_t)finfo.st_size) { | |
| *info.data=pool.malloc(to_read_size+(as_text?1:0)); | |
| *info.data_size=(size_t)read(f, *info.data, to_read_size); | |
| if(ssize_t(*info.data_size)<0 || *info.data_size>to_read_size) | |
| throw Exception(0, | |
| file_spec, | |
| "read failed: actually read %lu bytes count not in [0..%lu] valid range", | |
| *info.data_size, to_read_size); | |
| } else { // empty file | |
| if(as_text) { | |
| *info.data=pool.malloc(1); | |
| *(char*)(*info.data)=0; | |
| } else | |
| *info.data=0; | |
| *info.data_size=0; | |
| return; | |
| } | |
| } | } |
| File_read_result file_read(Pool& pool, Charset& charset, StringPtr file_spec, | |
| bool as_text, HashStringValue *params, | |
| bool fail_on_read_problem) { | |
| File_read_result result; | |
| if(file_spec->starts_with("http://", 7)) { | |
| // fail on read problem | |
| result.headers=file_read_http(pool, charset, file_spec, params).headers; | |
| result.success=true; | |
| } else { | |
| File_read_action_info info={&result.data, &result.data_size}; | |
| result.success=file_read_action_under_lock(pool, file_spec, | |
| "read", file_read_action, &info, | |
| as_text, fail_on_read_problem); | |
| } | |
| if(result.success && as_text) { | |
| // UTF-8 signature: EF BB BF | |
| if(result.data_size>=3) { | |
| char *in=(char *)result.data; | |
| if((in[0] == '\xEF') && (in[1] == '\xBB') && | |
| (in[2] == '\xBF')) { | |
| result.data=in+3; result.data_size-=3;// skip prefix | |
| } | |
| } | |
| fix_line_breaks((char *)(result.data), result.data_size); | |
| // note: after fixing | |
| ((char*&)(result.data))[result.data_size]=0; | |
| } | |
| char *file_read_text(Pool& pool, const char *fname, bool fail_on_read_problem) { | return result; |
| int f; | } |
| struct stat finfo; | |
| if(fname && !stat(fname,&finfo) &&(f=open(fname,O_RDONLY | bool file_read_action_under_lock(Pool& pool, StringPtr file_spec, |
| #ifdef WIN32 | const char* action_name, File_read_action action, void *context, |
| |O_TEXT | bool as_text, |
| bool fail_on_read_problem) { | |
| CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC); | |
| int f; | |
| // first open, next stat: | |
| // directory update of NTFS hard links performed on open. | |
| // ex: | |
| // a.html:^test[] and b.html hardlink to a.html | |
| // user inserts ! before ^test in a.html | |
| // directory entry of b.html in NTFS not updated at once, | |
| // they delay update till open, so we would receive "!^test[" string | |
| // if would do stat, next open. | |
| // later: it seems, even this does not help sometimes | |
| if((f=open(fname, O_RDONLY|(as_text?_O_TEXT:_O_BINARY)))>=0) { | |
| try { | |
| if(lock_shared_blocking(f)!=0) | |
| throw Exception("file.lock", | |
| file_spec, | |
| "shared lock failed: %s (%d), actual filename '%s'", | |
| strerror(errno), errno, fname.get()); | |
| struct stat finfo; | |
| if(stat(fname, &finfo)!=0) | |
| throw Exception("file.missing", // hardly possible: we just opened it OK | |
| file_spec, | |
| "stat failed: %s (%d), actual filename '%s'", | |
| strerror(errno), errno, fname.get()); | |
| #ifdef PA_SAFE_MODE | |
| if(finfo.st_uid/*foreign?*/!=geteuid() | |
| && finfo.st_gid/*foreign?*/!=getegid()) | |
| throw Exception("parser.runtime", | |
| file_spec, | |
| "parser is in safe mode: reading files of foreign group and user disabled [recompile parser with --disable-safe-mode configure option], actual filename '%s'", | |
| fname.get()); | |
| #endif | #endif |
| ))>=0) { | |
| /*if(exclusive) | action(pool, finfo, f, file_spec, fname, as_text, context); |
| flock(f, LOCK_EX);*/ | } catch(...) { |
| unlock(f);close(f); | |
| char *result=(char *)pool.malloc(finfo.st_size+1); | if(fail_on_read_problem) |
| int read_size=read(f,result,finfo.st_size); | rethrow; |
| if(read_size>=0 && read_size<=finfo.st_size) | return false; |
| result[read_size]='\0'; | } |
| /*if(exclusive) | |
| flock(f, LOCK_UN);*/ | unlock(f);close(f); |
| close(f); | return true; |
| return result;//prepare_config(result, remove_empty_lines); | } else { |
| } | if(fail_on_read_problem) |
| if(fail_on_read_problem) | throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0, |
| PTHROW(0,0, | file_spec, |
| 0, | "%s failed: %s (%d), actual filename '%s'", |
| "use: can not read '%s' file", fname); | action_name, strerror(errno), errno, fname.get()); |
| return 0; | return false; |
| } | |
| } | } |
| void file_write(Pool& pool, | static void create_dir_for_file(StringPtr file_spec) { |
| const char *fname, | size_t pos_after=1; |
| const char *data, size_t size, | int pos_before; |
| bool as_text, | while((pos_before=file_spec->pos("/", 1, pos_after))>=0) { |
| bool exclusive) { | mkdir(file_spec->mid(0, pos_before)->cstr(String::UL_FILE_SPEC), 0775); |
| if(fname) { | pos_after=pos_before+1; |
| int f; | } |
| if(access(fname, F_OK)!=0) {/*no*/ | } |
| if((f=open(fname,O_WRONLY|O_CREAT|_O_BINARY,0666))>0) | |
| close(f); | bool file_write_action_under_lock( |
| StringPtr file_spec, | |
| const char* action_name, File_write_action action, void *context, | |
| bool as_text, | |
| bool do_append, | |
| bool do_block, | |
| bool fail_on_lock_problem) { | |
| CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC); | |
| int f; | |
| if(access(fname, W_OK)!=0) // no | |
| create_dir_for_file(file_spec); | |
| if((f=open(fname, | |
| O_CREAT|O_RDWR | |
| |(as_text?_O_TEXT:_O_BINARY) | |
| |(do_append?O_APPEND:PA_O_TRUNC), 0664))>=0) { | |
| if((do_block?lock_exclusive_blocking(f):lock_exclusive_nonblocking(f))!=0) { | |
| Exception e("file.lock", | |
| file_spec, | |
| "shared lock failed: %s (%d), actual filename '%s'", | |
| strerror(errno), errno, fname.get()); | |
| close(f); | |
| if(fail_on_lock_problem) | |
| throw e; | |
| return false; | |
| } | } |
| if(access(fname, R_OK|W_OK)==0) { | |
| int mode=O_RDWR | try { |
| #ifdef WIN32 | action(f, context); |
| |O_TRUNC | } catch(...) { |
| #ifdef HAVE_FTRUNCATE | |
| if(!do_append) | |
| ftruncate(f, lseek(f, 0, SEEK_CUR)); // one can not use O_TRUNC, read lower | |
| #endif | #endif |
| ; | unlock(f);close(f); |
| #ifdef WIN32 | rethrow; |
| mode|=as_text?_O_TEXT:_O_BINARY; | } |
| #ifdef HAVE_FTRUNCATE | |
| if(!do_append) | |
| ftruncate(f, lseek(f, 0, SEEK_CUR)); // O_TRUNC truncates even exclusevely write-locked file [thanks to Igor Milyakov <virtan@rotabanner.com> for discovering] | |
| #endif | #endif |
| if((f=open(fname,mode,0666))>=0) { | unlock(f);close(f); |
| if(exclusive) | return true; |
| flock(f, LOCK_EX); | } else |
| throw Exception(errno==EACCES?"file.access":0, | |
| if(size) write(f,data,size); | file_spec, |
| #ifndef WIN32 | "%s failed: %s (%d), actual filename '%s'", |
| ftruncate(f,size); | action_name, strerror(errno), errno, fname.get()); |
| #endif | // here should be nothing, see rethrow above |
| if(exclusive) | } |
| flock(f, LOCK_UN); | |
| close(f); | #ifndef DOXYGEN |
| return; | struct File_write_action_info { |
| } | const char *data; size_t size; |
| }; | |
| #endif | |
| static void file_write_action(int f, void *context) { | |
| File_write_action_info& info=*static_cast<File_write_action_info *>(context); | |
| if(info.size) { | |
| int written=write(f, info.data, info.size); | |
| if(written<0) | |
| throw Exception(0, | |
| Exception::undefined_source, | |
| "write failed: %s (%d)", strerror(errno), errno); | |
| } | |
| } | |
| void file_write( | |
| StringPtr file_spec, | |
| const char *data, size_t size, | |
| bool as_text, | |
| bool do_append) { | |
| File_write_action_info info={data, size}; | |
| file_write_action_under_lock( | |
| file_spec, | |
| "write", file_write_action, &info, | |
| as_text, | |
| do_append); | |
| } | |
| // throws nothing! [this is required in file_move & file_delete] | |
| static void rmdir(StringPtr file_spec, size_t pos_after) { | |
| int pos_before; | |
| if((pos_before=file_spec->pos("/", 1, pos_after))>=0) | |
| rmdir(file_spec, pos_before+1); | |
| rmdir(file_spec->mid(0, pos_after-1/* / */)->cstr(String::UL_FILE_SPEC)); | |
| } | |
| bool file_delete(StringPtr file_spec, bool fail_on_read_problem) { | |
| CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC); | |
| if(unlink(fname)!=0) | |
| if(fail_on_read_problem) | |
| throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0, | |
| file_spec, | |
| "unlink failed: %s (%d), actual filename '%s'", | |
| strerror(errno), errno, fname.get()); | |
| else | |
| return false; | |
| rmdir(file_spec, 1); | |
| return true; | |
| } | |
| void file_move(StringPtr old_spec, StringPtr new_spec) { | |
| CharPtr old_spec_cstr=old_spec->cstr(String::UL_FILE_SPEC); | |
| CharPtr new_spec_cstr=new_spec->cstr(String::UL_FILE_SPEC); | |
| create_dir_for_file(new_spec); | |
| if(rename(old_spec_cstr, new_spec_cstr)!=0) | |
| throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0, | |
| old_spec, | |
| "rename failed: %s (%d), actual filename '%s' to '%s'", | |
| strerror(errno), errno, old_spec_cstr.get(), new_spec_cstr.get()); | |
| rmdir(old_spec, 1); | |
| } | |
| bool entry_exists(const char* fname, struct stat *afinfo) { | |
| struct stat lfinfo; | |
| bool result=stat(fname, &lfinfo)==0; | |
| if(afinfo) | |
| *afinfo=lfinfo; | |
| return result; | |
| } | |
| bool entry_exists(StringPtr file_spec) { | |
| CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC); | |
| return entry_exists(fname, 0); | |
| } | |
| static bool entry_readable(StringPtr file_spec, bool need_dir) { | |
| CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC); | |
| if(need_dir) { | |
| size_t size=strlen(fname); | |
| while(size) { | |
| char c=fname[size-1]; | |
| if(c=='/' || c=='\\') | |
| fname[--size]=0; | |
| else | |
| break; | |
| } | } |
| } | } |
| if(fname) | struct stat finfo; |
| PTHROW(0, 0, | if(access(fname, R_OK)==0 && entry_exists(fname, &finfo)) { |
| 0, | bool is_dir=(finfo.st_mode&S_IFDIR) != 0; |
| "file_write('%s'): %s (#%d)", | return is_dir==need_dir; |
| fname, strerror(errno), errno); | } |
| else | return false; |
| PTHROW(0, 0, | } |
| 0, | bool file_readable(StringPtr file_spec) { |
| "file_write: no filename specified"); | return entry_readable(file_spec, false); |
| } | |
| bool dir_readable(StringPtr file_spec) { | |
| return entry_readable(file_spec, true); | |
| } | |
| StringPtr file_readable(StringPtr path, const String& name) { | |
| StringPtr result(new String(*path)); | |
| *result << "/"; | |
| *result << name; | |
| return file_readable(result)?result:StringPtr(0); | |
| } | |
| bool file_executable(StringPtr file_spec) { | |
| return access(file_spec->cstr(String::UL_FILE_SPEC), X_OK)==0; | |
| } | |
| bool file_stat(StringPtr file_spec, | |
| size_t& rsize, | |
| time_t& ratime, | |
| time_t& rmtime, | |
| time_t& rctime, | |
| bool fail_on_read_problem) { | |
| CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC); | |
| struct stat finfo; | |
| if(stat(fname, &finfo)!=0) | |
| if(fail_on_read_problem) | |
| throw Exception("file.missing", | |
| file_spec, | |
| "getting file size failed: %s (%d), real filename '%s'", | |
| strerror(errno), errno, fname.get()); | |
| else | |
| return false; | |
| rsize=finfo.st_size; | |
| ratime=finfo.st_atime; | |
| rmtime=finfo.st_mtime; | |
| rctime=finfo.st_ctime; | |
| return true; | |
| } | } |
| char *getrow(char **row_ref, char delim) { | char* getrow(char* *row_ref, char delim) { |
| char *result=*row_ref; | char* result=*row_ref; |
| if(result) { | if(result) { |
| *row_ref=strchr(result, delim); | *row_ref=strchr(result, delim); |
| if(*row_ref) | if(*row_ref) |
| *((*row_ref)++)=0; | *((*row_ref)++)=0; |
| else if(!*result) | else if(!*result) |
| Line 160 char *getrow(char **row_ref, char delim) | Line 761 char *getrow(char **row_ref, char delim) |
| return result; | return result; |
| } | } |
| char *lsplit(char *string_ref, char delim) { | char* lsplit(char* string, char delim) { |
| if(string_ref) { | if(string) { |
| char *v=strchr(string_ref, delim); | char* v=strchr(string, delim); |
| if(v) { | if(v) { |
| *v=0; | *v=0; |
| return v+1; | return v+1; |
| Line 171 char *lsplit(char *string_ref, char deli | Line 772 char *lsplit(char *string_ref, char deli |
| return 0; | return 0; |
| } | } |
| char *lsplit(char **string_ref, char delim) { | char* lsplit(char* *string_ref, char delim) { |
| char *result=*string_ref; | char* result=*string_ref; |
| char *next=lsplit(*string_ref, delim); | char* next=lsplit(*string_ref, delim); |
| *string_ref=next; | *string_ref=next; |
| return result; | return result; |
| } | } |
| char *rsplit(char *string, char delim) { | char* rsplit(char* string, char delim) { |
| if(string) { | if(string) { |
| char *v=strrchr(string, delim); | char* v=strrchr(string, delim); |
| if(v) { | if(v) { |
| *v=0; | *v=0; |
| return v+1; | return v+1; |
| Line 189 char *rsplit(char *string, char delim) { | Line 790 char *rsplit(char *string, char delim) { |
| return NULL; | return NULL; |
| } | } |
| char *format(Pool& pool, double value, char *fmt) { | /// @todo less stupid type detection |
| char *result=(char *)pool.malloc(MAX_NUMBER); | const char* format(Pool& pool, double value, char* fmt) { |
| char local_buf[MAX_NUMBER]; | |
| size_t size; | |
| if(fmt) | if(fmt) |
| if(strpbrk(fmt, "diouxX")) | if(strpbrk(fmt, "diouxX")) |
| if(strpbrk(fmt, "ouxX")) | if(strpbrk(fmt, "ouxX")) |
| snprintf(result, MAX_NUMBER, fmt,(uint)value ); | size=snprintf(local_buf, sizeof(local_buf), fmt, (uint)value); |
| else | else |
| snprintf(result, MAX_NUMBER, fmt,(int)value ); | size=snprintf(local_buf, sizeof(local_buf), fmt, (int)value); |
| else | else |
| snprintf(result, MAX_NUMBER, fmt, value); | size=snprintf(local_buf, sizeof(local_buf), fmt, value); |
| else | else |
| snprintf(result, MAX_NUMBER, "%d",(int)value); | size=snprintf(local_buf, sizeof(local_buf), "%d", (int)value); |
| return result; | return pool.copy(local_buf, size+1); |
| } | } |
| size_t stdout_write(const char *buf, size_t size) { | size_t stdout_write(const void *buf, size_t size) { |
| #ifdef WIN32 | #ifdef WIN32 |
| do{ | do{ |
| int chunk_written=fwrite(buf, 1, min(8*0x400, size), stdout); | int chunk_written=fwrite(buf, 1, min(8*0x400, size), stdout); |
| if(chunk_written<=0) | if(chunk_written<=0) |
| break; | break; |
| size-=chunk_written; | size-=chunk_written; |
| buf+=chunk_written; | buf=((const char*)buf)+chunk_written; |
| } while(size>0); | } while(size>0); |
| return size; | return size; |
| #else | #else |
| return fwrite(buf, 1, size, stdout); | return fwrite(buf, 1, size, stdout); |
| #endif | #endif |
| } | } |
| const char *unescape_chars(Pool& pool, const char *cp, int len) { | char* unescape_chars(Pool& pool, const char* cp, int len) { |
| char *s=(char *)pool.malloc(len + 1); | char* s=pool.malloc(len + 1); |
| enum EscapeState { | enum EscapeState { |
| EscapeRest, | EscapeRest, |
| EscapeFirst, | EscapeFirst, |
| EscapeSecond | EscapeSecond |
| } escapeState=EscapeRest; | } escapeState=EscapeRest; |
| int escapedValue=0; | int escapedValue=0; |
| int srcPos=0; | int srcPos=0; |
| int dstPos=0; | int dstPos=0; |
| while(srcPos < len) { | while(srcPos < len) { |
| int ch=cp[srcPos]; | int ch=cp[srcPos]; |
| switch(escapeState) { | switch(escapeState) { |
| case EscapeRest: | case EscapeRest: |
| if(ch=='%') { | if(ch=='%') { |
| escapeState=EscapeFirst; | escapeState=EscapeFirst; |
| } else if(ch=='+') { | } else if(ch=='+') { |
| s[dstPos++]=' '; | s[dstPos++]=' '; |
| } else { | } else { |
| s[dstPos++]=ch; | s[dstPos++]=ch; |
| } | } |
| Line 248 const char *unescape_chars(Pool& pool, c | Line 852 const char *unescape_chars(Pool& pool, c |
| escapeState=EscapeSecond; | escapeState=EscapeSecond; |
| break; | break; |
| case EscapeSecond: | case EscapeSecond: |
| escapedValue +=hex_value[ch]; | escapedValue +=hex_value[ch]; |
| s[dstPos++]=escapedValue; | s[dstPos++]=escapedValue; |
| escapeState=EscapeRest; | escapeState=EscapeRest; |
| break; | break; |
| } | } |
| srcPos++; | srcPos++; |
| } | } |
| s[dstPos]=0; | s[dstPos]=0; |
| return s; | return s; |
| } | } |
| static void append_attribute_subattribute(const Hash::Key& akey, Hash::Val *avalue, | #ifdef WIN32 |
| void *info) { | void back_slashes_to_slashes(char* s) { |
| if(akey==VALUE_NAME) | if(s) |
| return; | for(; *s; s++) |
| if(*s=='\\') | |
| *s='/'; | |
| } | |
| /* | |
| void slashes_to_back_slashes(char* s) { | |
| if(s) | |
| for(; *s; s++) | |
| if(*s=='/') | |
| *s='\\'; | |
| } | |
| */ | |
| #endif | |
| bool StrEqNc(const char* s1, const char* s2, bool strict) { | |
| while(true) { | |
| if(!(*s1)) { | |
| if(!(*s2)) | |
| return true; | |
| else | |
| return !strict; | |
| } else if(!(*s2)) | |
| return !strict; | |
| if(isalpha(*s1)) { | |
| if(tolower(*s1) !=tolower(*s2)) | |
| return false; | |
| } else if((*s1) !=(*s2)) | |
| return false; | |
| s1++; | |
| s2++; | |
| } | |
| } | |
| static bool isLeap(int year) { | |
| return !( | |
| (year % 4) || ((year % 400) && !(year % 100)) | |
| ); | |
| } | |
| int getMonthDays(int year, int month) { | |
| int monthDays[]={ | |
| 31, | |
| isLeap(year) ? 29 : 28, | |
| 31, | |
| 30, | |
| 31, | |
| 30, | |
| 31, | |
| 31, | |
| 30, | |
| 31, | |
| 30, | |
| 31 | |
| }; | |
| return monthDays[month]; | |
| } | |
| void remove_crlf(char* start, char* end) { | |
| for(char* p=start; p<end; p++) | |
| switch(*p) { | |
| case '\n': *p='|'; break; | |
| case '\r': *p=' '; break; | |
| } | |
| } | |
| /// must be last in this file | |
| #undef vsnprintf | |
| int __vsnprintf(char* b, size_t s, const char* f, va_list l) { | |
| if(!s) | |
| return 0; | |
| int r; | |
| // note: on win32& maybe somewhere else | |
| // vsnprintf do not writes terminating 0 in 'buffer full' case, reducing | |
| --s; | |
| #if _MSC_VER | |
| /* | |
| win32: | |
| mk:@MSITStore:C:\Program%20Files\Microsoft%20Visual%20Studio\MSDN\2001APR\1033\vccore.chm::/html/_crt__vsnprintf.2c_._vsnwprintf.htm | |
| if the number of bytes to write exceeds buffer, then count bytes are written and Ö1 is returned | |
| */ | |
| r=_vsnprintf(b, s, f, l); | |
| if(r<0) | |
| r=s; | |
| #else | |
| r=vsnprintf(b, s, f, l); | |
| /* | |
| solaris: | |
| man vsnprintf | |
| The snprintf() function returns the number of characters | |
| formatted, that is, the number of characters that would have | |
| been written to the buffer if it were large enough. If the | |
| value of n is 0 on a call to snprintf(), an unspecified | |
| value less than 1 is returned. | |
| */ | |
| if(r<0) | |
| r=0; | |
| else if(r>s) | |
| r=s; | |
| #endif | |
| b[r]=0; | |
| return r; | |
| } | |
| int __snprintf(char* b, size_t s, const char* f, ...) { | |
| va_list l; | |
| va_start(l, f); | |
| int r=__vsnprintf(b, s, f, l); | |
| va_end(l); | |
| return r; | |
| } | |
| int pa_sleep(unsigned long secs, unsigned long usecs) { | |
| for (; usecs >= 1000000; ++secs, usecs -= 1000000); | |
| #ifdef WIN32 | |
| Sleep(secs * 1000 + usecs / 1000); | |
| return 0; | |
| #else | |
| struct timeval t; | |
| t.tv_sec = secs; | |
| t.tv_usec = usecs; | |
| return (select(0, NULL, NULL, NULL, &t) == -1 ? errno : 0); | |
| #endif | |
| } | |
| // ...; charset=windows1251 | |
| String *string=static_cast<String *>(info); | |
| string->APPEND_CONST("; "); | |
| string->append(akey, String::UL_HEADER, true); | |
| string->APPEND_CONST("="); | |
| string->append(static_cast<Value *>(avalue)->as_string(), | |
| String::UL_HEADER, true); | |
| } | |
| const String& attributed_meaning_string(Value *meaning) { | |
| String &result=*new(meaning->pool()) String(meaning->pool()); | |
| if(Hash *hash=meaning->get_hash()) { | |
| // $value(value) $subattribute(subattribute value) | |
| if(Value *value=static_cast<Value *>(hash->get(*value_name))) | |
| result.append(value->as_string(), String::UL_HEADER, true); | |
| hash->foreach(append_attribute_subattribute, &result); | |
| } else // result value | |
| result.append(meaning->as_string(), String::UL_HEADER, true); | |
| return result; | |
| } | |