Annotation of parser3/src/main/pa_file.C, revision 1.11
1.1 moko 1: /** @file
2: Parser: file and file system related functions.
3:
4: Copyright (c) 2000-2026 Art. Lebedev Studio (https://www.artlebedev.com)
5: Authors: Konstantin Morshnev <moko@design.ru>, Alexandr Petrosian <paf@design.ru>
6: */
7:
8: #include "pa_file.h"
9: #include "pa_dir.h"
10: #include "pa_charsets.h"
11: #include "pa_http.h"
12: #include "pa_convert_utf.h"
13:
14: #ifdef _MSC_VER
15: #include <windows.h>
16: #include <direct.h>
17: #endif
18:
1.11 ! moko 19: volatile const char * IDENT_PA_FILE_C="$Id: pa_file.C,v 1.10 2026/10/02 15:49:42 moko Exp $" IDENT_PA_FILE_H;
1.8 moko 20:
21: // a tainted path scheme (file://, http:// or parser://) would be accepted
22: //#define IGNORE_FILE_PREFIX_LANGUAGES
1.1 moko 23:
24: // some maybe-undefined constants
25:
26: #ifndef _O_TEXT
27: # define _O_TEXT 0
28: #endif
29: #ifndef _O_BINARY
30: # define _O_BINARY 0
31: #endif
32:
33: #ifdef HAVE_FTRUNCATE
34: # define PA_O_TRUNC 0
35: #else
36: # ifdef _O_TRUNC
37: # define PA_O_TRUNC _O_TRUNC
38: # else
39: # error you must have either ftruncate function or _O_TRUNC bit declared
40: # endif
41: #endif
42:
43: #ifdef WIN32
44:
45: bool is_os_absolute_path(const String& path) {
46: return is_os_absolute_path(path.cstr());
47: }
48:
49: bool is_os_absolute_path(const char* path) {
50: return path[0] && path[0]!=':' && path[1]==':' // DRIVE: (including drive-relative paths, for compatibility)
1.4 moko 51: || path[0]=='\\' && path[1]=='\\'; // UNC, only '\\' is supported as '//' is a document root relative path
1.1 moko 52: }
53: #endif
54:
1.5 moko 55: uint path_scheme(const String& path) {
56: if(path.starts_with("file://"))
57: return PA_SCHEME_FILE;
58: if(path.starts_with("http://"))
59: return PA_SCHEME_HTTP;
60: if(path.starts_with("parser://"))
61: return PA_SCHEME_PARSER;
62: return PA_SCHEME_NONE;
63: }
64:
1.9 moko 65: bool clean_path_scheme(uint scheme, const String& path) {
66: #ifdef IGNORE_FILE_PREFIX_LANGUAGES
67: return true;
68: #else
69: return path.check_lang(String::L_AS_IS, 0, scheme==PA_SCHEME_PARSER ? 9 /* "parser://" */ : 7 /* "file://" or "http://" */);
70: #endif
71: }
72:
1.5 moko 73: void check_path_scheme(uint scheme, const String& path, uint allowed) {
74: if(scheme!=PA_SCHEME_FILE && !(allowed&scheme))
75: throw Exception(PARSER_RUNTIME, &path, "unsupported path scheme");
1.9 moko 76: if(!clean_path_scheme(scheme, path))
1.8 moko 77: throw Exception(PARSER_RUNTIME, &path, "tainted path scheme");
1.5 moko 78: }
79:
1.10 moko 80: int path_cmp(const char* path, const char* dir, size_t length) {
81: #ifdef WIN32
82: return strncasecmp(path, dir, length); // mostly for the drive letter
83: #else
84: return strncmp(path, dir, length);
85: #endif
86: }
87:
1.11 ! moko 88: const char* actual_filename(const String& file_spec, const char* fname) {
! 89: return strcmp(file_spec.cstr(), fname) ? pa_strcat(", actual filename '", fname, "'") : "";
! 90: }
! 91:
1.5 moko 92: const String* file_uri_to_path(const String& uri) {
93: const String* rest=&uri.mid(7 /* "file://" */, uri.length());
94: if(rest->starts_with("localhost/"))
95: rest=&rest->mid(9 /* "localhost", keeping the slash */, rest->length());
96: if(rest->first_char()=='/') {
97: // file:///C:/path and file://localhost/C:/path: the slash before a drive name is not a part of the path
98: const String& disk=rest->mid(1, rest->length());
99: return is_os_absolute_path(disk) ? &disk : rest;
100: }
101: if(is_os_absolute_path(*rest))
102: return rest; // file://C:/path, not a standard form but in use
1.7 moko 103: #ifdef WIN32
104: if(rest->pos('/')!=STRING_NOT_FOUND) { // file://server/share/path is the UNC path \\server\share\path
105: String& result=*new String("//");
106: result << *rest;
107: return &result;
108: }
109: #endif
1.5 moko 110: return 0;
111: }
112:
1.1 moko 113: // externs
114:
115: const UTF16* pa_utf16_encode(const char* in, Charset& source_charset);
116:
117: // functions
118:
119: #ifdef _MSC_VER
120:
121: #define PA_UTF16_ENC(value) (const wchar_t *)pa_utf16_encode(value, pa_thread_request().charsets.source())
122:
123: int pa_stat(const char *pathname, struct stat *buffer){
124: return _wstat64(PA_UTF16_ENC(pathname), buffer);
125: }
126:
127: int pa_open(const char *pathname, int flags, int mode){
128: return _wopen(PA_UTF16_ENC(pathname), flags, mode);
129: }
130:
131: FILE *pa_fopen(const char *pathname, const char *mode){
132: return _wfopen(PA_UTF16_ENC(pathname), PA_UTF16_ENC(mode));
133: }
134:
135: int pa_mkdir(const char *pathname, int){
136: return _wmkdir(PA_UTF16_ENC(pathname));
137: }
138:
139: int pa_rmdir(const char *pathname){
140: return _wrmdir(PA_UTF16_ENC(pathname));
141: }
142:
143: int pa_rename(const char *oldpath, const char *newpath){
144: return _wrename(PA_UTF16_ENC(oldpath), PA_UTF16_ENC(newpath));
145: }
146:
147: int pa_unlink(const char *pathname){
148: return _wunlink(PA_UTF16_ENC(pathname));
149: }
150:
151: #else
152:
153: #define pa_mkdir mkdir
154: #define pa_rmdir rmdir
155: #define pa_rename rename
156: #define pa_unlink unlink
157:
158: #endif
159:
160: /// these options were handled but not checked elsewhere, now check them
161: int pa_get_valid_file_options_count(HashStringValue& options) {
162: int result=0;
163: if(options.get(PA_SQL_LIMIT_NAME))
164: result++;
165: if(options.get(PA_SQL_OFFSET_NAME))
166: result++;
167: if(options.get(PA_COLUMN_SEPARATOR_NAME))
168: result++;
169: if(options.get(PA_COLUMN_ENCLOSER_NAME))
170: result++;
171: if(options.get(PA_CHARSET_NAME))
172: result++;
173: return result;
174: }
175:
176: #ifndef DOXYGEN
177: struct File_read_action_info {
178: char **data; size_t *data_size;
179: char* buf; uint64_t offset; size_t limit;
1.3 moko 180: };
1.1 moko 181: #endif
182:
183: static void file_read_action(struct stat& finfo, int f, const String& file_spec, void *context) {
1.3 moko 184: File_read_action_info& info = *static_cast<File_read_action_info *>(context);
1.1 moko 185: size_t to_read_size = check_file_size(info.limit && info.limit < (size_t)finfo.st_size ? info.limit : (size_t)finfo.st_size, &file_spec);
186: if(to_read_size) {
187: if(info.offset)
188: pa_lseek(f, info.offset, SEEK_SET); // seek never fails as POSIX allows the file offset to be set beyond the EOF
189: *info.data = info.buf ? info.buf : (char *)pa_malloc_atomic(to_read_size+1);
190: ssize_t result = read(f, *info.data, to_read_size);
191: if(result<0)
192: throw Exception("file.read", &file_spec, "read failed: %s (%d)", strerror(errno), errno);
193: *info.data_size = result;
194: } else { // empty file
195: // for both, text and binary: for text we need that terminator, for binary we need nonzero pointer to be able to save such files
196: *info.data = (char *)pa_malloc_atomic(1);
197: *(char*)(*info.data) = 0;
198: *info.data_size = 0;
199: return;
200: }
201: }
202:
203: File_read_result file_read_binary(const String& file_spec, bool fail_on_read_problem, char* buf, uint64_t offset, size_t limit) {
204: File_read_result result = {false, 0, 0, 0};
205: File_read_action_info info = {&result.str, &result.length, buf, offset, limit};
206:
207: result.success = file_read_action_under_lock(file_spec, "read", file_read_action, &info, 0, fail_on_read_problem);
208: return result;
209: }
210:
1.3 moko 211: File_read_result file_read(Request_charsets& charsets, const String& file_spec,
1.1 moko 212: bool as_text, HashStringValue *options,
213: bool fail_on_read_problem,
214: size_t offset = 0, size_t limit = 0, bool transcode_text_result = true) {
215: File_read_result result = {false, 0, 0, 0};
216: if(options){
217: int valid_options = pa_get_valid_file_options_count(*options);
218: if(valid_options != options->count())
219: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
220: }
221:
1.3 moko 222: File_read_action_info info = {&result.str, &result.length, 0, offset, limit};
1.1 moko 223:
1.3 moko 224: result.success = file_read_action_under_lock(file_spec, "read", file_read_action, &info, as_text, fail_on_read_problem);
1.1 moko 225:
226: if(as_text){
227: if(result.success){
228: Charset* asked_charset = 0;
229: if(options)
230: if(Value* vcharset_name = options->get(PA_CHARSET_NAME))
231: asked_charset = &pa_charsets.get(vcharset_name->as_string());
232:
233: asked_charset = pa_charsets.checkBOM(result.str, result.length, asked_charset);
234:
235: if(result.length && transcode_text_result && asked_charset){ // length must be checked because transcode returns CONST string in case length==0, which contradicts hacking few lines below
236: String::C body = String::C(result.str, result.length);
237: body=Charset::transcode(body, *asked_charset, charsets.source());
238:
239: result.str = const_cast<char*>(body.str); // hacking a little
240: result.length = body.length;
241: }
242: }
243: if(result.length)
244: fix_line_breaks(result.str, result.length);
245: }
246:
247: return result;
248: }
249:
1.3 moko 250: File_read_result file_load(Request& r, const String& file_spec,
1.1 moko 251: bool as_text, HashStringValue *options,
252: bool fail_on_read_problem,
253: bool transcode_text_result) {
254:
255: size_t offset = 0;
256: size_t limit = 0;
257:
258: if(options){
259: if(Value *voffset = (Value *)options->get(sql_offset_name))
260: offset = r.process(*voffset).as_int();
261: if(Value *vlimit = (Value *)options->get(sql_limit_name))
262: limit = r.process(*vlimit).as_int();
263: // no check on options count here
264: }
265:
266: if(file_spec.starts_with("http://")) {
267: if(offset || limit)
268: throw Exception(PARSER_RUNTIME, 0, "offset and load options are not supported for HTTP:// file load");
269:
270: // fail on read problem
271: File_read_http_result http = pa_internal_file_read_http(r, file_spec, as_text, options, transcode_text_result);
272:
273: File_read_result result = {true, http.str, http.length, http.headers};
274: return result;
275: } else
276: return file_read(r.charsets, file_spec, as_text, options, fail_on_read_problem, offset, limit, transcode_text_result);
277: }
278:
279: char* file_read_text(Request_charsets& charsets, const String& file_spec, bool fail_on_read_problem) {
280: File_read_result file = file_read(charsets, file_spec, true, 0, fail_on_read_problem);
281: return file.success ? file.str : 0;
282: }
283:
284: char* file_load_text(Request& r, const String& file_spec, bool fail_on_read_problem, HashStringValue* options, bool transcode_result) {
285: File_read_result file = file_load(r, file_spec, true, options, fail_on_read_problem, transcode_result);
286: return file.success ? file.str : 0;
287: }
288:
289: #ifdef PA_SAFE_MODE
290: void check_safe_mode(struct stat finfo, const String& file_spec, const char* fname) {
291: if(finfo.st_uid/*foreign?*/!=geteuid()
292: && finfo.st_gid/*foreign?*/!=getegid())
293: throw Exception(PARSER_RUNTIME,
294: &file_spec,
295: "parser is in safe mode: reading files of foreign group and user disabled "
296: "[recompile parser with --disable-safe-mode configure option], "
297: "actual filename '%s', fuid(%d)!=euid(%d) or fgid(%d)!=egid(%d)",
298: fname, finfo.st_uid, geteuid(), finfo.st_gid, getegid()
299: );
300: }
301: #else
302: void check_safe_mode(struct stat, const String&, const char*) {
303: }
304: #endif
305:
306:
307: bool file_read_action_under_lock(const String& file_spec, const char* action_name, File_read_action action, void *context,
308: bool as_text, bool fail_on_read_problem) {
309:
310: const char* fname=file_spec.taint_cstr(String::L_FILE_SPEC);
311: int f;
312:
313: // first open, next stat:
314: // directory update of NTFS hard links performed on open.
1.3 moko 315: // ex:
1.1 moko 316: // a.html:^test[] and b.html hardlink to a.html
317: // user inserts ! before ^test in a.html
1.3 moko 318: // directory entry of b.html in NTFS not updated at once,
1.1 moko 319: // they delay update till open, so we would receive "!^test[" string
320: // if would do stat, next open.
321: // later: it seems, even this does not help sometimes
322: if((f=pa_open(fname, O_RDONLY | (as_text ? _O_TEXT : _O_BINARY) ))>=0) {
323: try {
324: int pa_errno=pa_lock_shared_blocking(f);
325: if(pa_errno!=0)
1.11 ! moko 326: throw Exception("file.lock", &file_spec, "shared lock failed: %s (%d)%s", strerror(pa_errno), pa_errno, actual_filename(file_spec, fname));
1.1 moko 327:
328: struct stat finfo;
329: if(pa_fstat(f, &finfo)!=0)
330: throw Exception("file.missing", // hardly possible: we just opened it OK
1.11 ! moko 331: &file_spec, "stat failed: %s (%d)%s", strerror(errno), errno, actual_filename(file_spec, fname));
1.1 moko 332:
333: check_safe_mode(finfo, file_spec, fname);
334:
1.3 moko 335: action(finfo, f, file_spec, context);
1.1 moko 336: } catch(...) {
1.3 moko 337: pa_unlock(f);close(f);
1.1 moko 338: if(fail_on_read_problem)
339: rethrow;
340: return false;
1.3 moko 341: }
1.1 moko 342:
1.3 moko 343: pa_unlock(f);close(f);
1.1 moko 344: return true;
345: } else {
346: if(fail_on_read_problem)
347: throw Exception(errno==EACCES ? "file.access" : (errno==ENOENT || errno==ENOTDIR || errno==ENODEV) ? "file.missing" : 0,
1.11 ! moko 348: &file_spec, "%s failed: %s (%d)%s", action_name, strerror(errno), errno, actual_filename(file_spec, fname));
1.1 moko 349: return false;
350: }
351: }
352:
353: void create_dir_for_file(const String& file_spec) {
354: const char *str=file_spec.taint_cstr(String::L_FILE_SPEC);
355: if(str[0]){
356: const char *pos=str+1;
1.6 moko 357: while((pos=strchr(pos, '/')) && pos[1]) { // to avoid trailing /, see #1166
1.1 moko 358: pa_mkdir(pa_strdup(str,pos-str), 0775);
359: pos++;
360: }
361: }
362: }
363:
364: bool file_write_action_under_lock(const String& file_spec, const char* action_name, File_write_action action, void *context,
365: bool as_text, bool do_append, bool do_block, bool fail_on_lock_problem) {
366:
367: const char* fname=file_spec.taint_cstr(String::L_FILE_SPEC);
368: int f;
369: if(access(fname, W_OK)!=0) // no
370: create_dir_for_file(file_spec);
371:
372: if((f=pa_open(fname, O_CREAT | O_RDWR | (as_text ? _O_TEXT : _O_BINARY) | (do_append ? O_APPEND : PA_O_TRUNC), 0664))>=0) {
373: int pa_errno=do_block ? pa_lock_exclusive_blocking(f) : pa_lock_exclusive_nonblocking(f);
374: if(pa_errno!=0) {
1.11 ! moko 375: Exception e("file.lock", &file_spec, "exclusive lock failed: %s (%d)%s", strerror(pa_errno), pa_errno, actual_filename(file_spec, fname));
1.1 moko 376: close(f);
377: if(fail_on_lock_problem)
378: throw e;
379: return false;
380: }
381:
382: try {
383: #if (defined(HAVE_FCHMOD) && defined(PA_SAFE_MODE))
384: struct stat finfo;
385: if(pa_fstat(f, &finfo)==0 && finfo.st_mode & 0111)
386: fchmod(f, finfo.st_mode & 0666/*clear executable bits*/); // backward: ignore errors if any
387: #endif
388: action(f, context);
389: } catch(...) {
390: #ifdef HAVE_FTRUNCATE
391: if(!do_append)
392: PA_UNUSED int ignore_result=ftruncate(f, lseek(f, 0, SEEK_CUR)); // one cannot use O_TRUNC, read lower
393: #endif
394: pa_unlock(f);close(f);
395: rethrow;
396: }
397:
398: #ifdef HAVE_FTRUNCATE
399: if(!do_append)
400: PA_UNUSED int ignore_result=ftruncate(f, lseek(f, 0, SEEK_CUR)); // O_TRUNC truncates even exclusevely write-locked file [thanks to Igor Milyakov <virtan@rotabanner.com> for discovering]
401: #endif
402: pa_unlock(f);close(f);
403: return true;
404: } else
1.11 ! moko 405: throw Exception(errno==EACCES ? "file.access" : 0, &file_spec, "%s failed: %s (%d)%s", action_name, strerror(errno), errno, actual_filename(file_spec, fname));
1.1 moko 406: // here should be nothing, see rethrow above
407: }
408:
409: #ifndef DOXYGEN
410: struct File_write_action_info {
411: const char* str;
412: size_t length;
413: };
414: #endif
415:
416: // a single write() must stay below INT_MAX as windows _write() reports written bytes as int
417: #define FILE_WRITE_CHUNK_SIZE (256*0x100000)
418:
419: static const char* bytes_left(size_t rest) {
420: return rest ? pa_strcat(", ", pa_uitoa(rest), " bytes left") : "";
421: }
422:
423: static void file_write_action(int f, void *context) {
424: File_write_action_info& info=*static_cast<File_write_action_info *>(context);
425:
426: const char* data=info.str;
427: size_t left=info.length;
428:
429: while(left) {
430: size_t portion=min(left, (size_t)FILE_WRITE_CHUNK_SIZE);
431: ssize_t written=write(f, data, portion);
432: if(written<0)
433: throw Exception("file.write", 0, "error writing %s bytes: %s (%d)%s", pa_uitoa(portion), strerror(errno), errno, bytes_left(left-portion));
434: if(written==0)
435: throw Exception("file.write", 0, "error writing %s bytes: zero bytes written%s", pa_uitoa(portion), bytes_left(left-portion));
436: data+=written;
437: left-=written;
438: }
439: }
440:
441: void file_write(
442: Request_charsets& charsets,
443: const String& file_spec,
444: const char* data,
1.3 moko 445: size_t size,
446: bool as_text,
1.1 moko 447: bool do_append,
448: Charset* asked_charset) {
449:
450: if(as_text && asked_charset){
451: String::C body=String::C(data, size);
452: body=Charset::transcode(body, charsets.source(), *asked_charset);
453: data=body.str;
454: size=body.length;
455: };
456:
457: File_write_action_info info={data, size};
458:
459: file_write_action_under_lock(
460: file_spec,
461: "write",
462: file_write_action,
463: &info,
464: as_text,
465: do_append);
466: }
467:
468: static size_t get_dir(char* fname, size_t helper_length){
469: bool dir=false;
470: size_t pos=0;
471: for(pos=helper_length; pos; pos--){
472: char c=fname[pos-1];
1.6 moko 473: if(c=='/'){
1.1 moko 474: fname[pos-1]=0;
475: dir=true;
476: } else if(dir) break;
477: }
478: return pos;
479: }
480:
481: bool entry_exists(const char* fname, struct stat *afinfo) {
482: struct stat lfinfo;
483: bool result=pa_stat(fname, &lfinfo)==0;
484: if(afinfo)
485: *afinfo=lfinfo;
486: return result;
487: }
488:
489: bool entry_exists(const String& file_spec) {
1.3 moko 490: return entry_exists(file_spec.taint_cstr(String::L_FILE_SPEC), 0);
1.1 moko 491: }
492:
493: static bool entry_ifdir(char *fname, bool need_dir) {
494: if(need_dir){
495: size_t size=strlen(fname);
496: while(size) {
497: char c=fname[size-1];
1.6 moko 498: if(c=='/')
1.1 moko 499: fname[--size]=0;
500: else
501: break;
502: }
503: }
504:
505: struct stat finfo;
506: if(entry_exists(fname, &finfo)) {
507: bool is_dir=(finfo.st_mode&S_IFDIR) != 0;
508: return is_dir==need_dir;
509: }
510: return false;
511: }
512:
513: static bool entry_ifdir(const String& file_spec, bool need_dir) {
514: return entry_ifdir(file_spec.taint_cstrm(String::L_FILE_SPEC), need_dir);
515: }
516:
517: // throws nothing! [this is required in file_move & file_delete]
518: static void rmdir(const String& file_spec, size_t pos_after) {
519: char* dir_spec=file_spec.taint_cstrm(String::L_FILE_SPEC);
520: size_t length=strlen(dir_spec);
521: while( (length=get_dir(dir_spec, length)) && (length > pos_after) ){
522: #ifdef _MSC_VER
523: if(!entry_ifdir(dir_spec, true))
524: break;
525: DWORD attrs=GetFileAttributesW(PA_UTF16_ENC(dir_spec));
526: if(
527: (attrs==INVALID_FILE_ATTRIBUTES)
528: || !(attrs & FILE_ATTRIBUTE_DIRECTORY)
529: || (attrs & FILE_ATTRIBUTE_REPARSE_POINT)
530: )
531: break;
532: #endif
533: if(pa_rmdir(dir_spec))
534: break;
535: };
536: }
537:
538: bool file_delete(const String& file_spec, bool fail_on_problem, bool keep_empty_dirs) {
1.3 moko 539: const char* fname=file_spec.taint_cstr(String::L_FILE_SPEC);
1.1 moko 540: if(pa_unlink(fname)!=0) {
541: if(fail_on_problem)
542: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
1.11 ! moko 543: &file_spec, "unlink failed: %s (%d)%s", strerror(errno), errno, actual_filename(file_spec, fname));
1.1 moko 544: else
545: return false;
546: }
547:
548: if(!keep_empty_dirs)
1.3 moko 549: rmdir(file_spec, 1);
1.1 moko 550:
551: return true;
552: }
553:
554: void file_move(const String& old_spec, const String& new_spec, bool keep_empty_dirs) {
1.3 moko 555: const char* old_spec_cstr=old_spec.taint_cstr(String::L_FILE_SPEC);
556: const char* new_spec_cstr=new_spec.taint_cstr(String::L_FILE_SPEC);
1.1 moko 557:
1.3 moko 558: create_dir_for_file(new_spec);
1.1 moko 559:
560: if(pa_rename(old_spec_cstr, new_spec_cstr)!=0)
561: throw Exception(errno==EACCES ? "file.access" : errno==ENOENT ? "file.missing" : 0,
1.11 ! moko 562: &old_spec, "rename to '%s' failed: %s (%d)%s", new_spec_cstr, strerror(errno), errno, actual_filename(old_spec, old_spec_cstr));
1.1 moko 563:
564: if(!keep_empty_dirs)
1.3 moko 565: rmdir(old_spec, 1);
1.1 moko 566: }
567:
568:
569: bool file_exist(const String& file_spec) {
1.3 moko 570: return entry_ifdir(file_spec, false);
1.1 moko 571: }
572:
573: bool dir_exists(const String& file_spec) {
1.3 moko 574: return entry_ifdir(file_spec, true);
1.1 moko 575: }
576:
577: const String* file_exist(const String& path, const String& name) {
578: String& result=*new String(path);
1.6 moko 579: if(path.last_char() != '/')
1.1 moko 580: result << "/";
581: result << name;
582: return file_exist(result)?&result:0;
583: }
584:
585: bool file_executable(const String& file_spec) {
586: return access(file_spec.taint_cstr(String::L_FILE_SPEC), X_OK)==0;
587: }
588:
589: bool file_stat(const String& file_spec, uint64_t& rsize, time_t& ratime, time_t& rmtime, time_t& rctime, bool fail_on_read_problem) {
1.3 moko 590: const char* fname=file_spec.taint_cstr(String::L_FILE_SPEC);
1.1 moko 591: struct stat finfo;
592: if(pa_stat(fname, &finfo)!=0) {
593: if(fail_on_read_problem)
1.11 ! moko 594: throw Exception("file.missing", &file_spec, "getting file size failed: %s (%d)%s", strerror(errno), errno, actual_filename(file_spec, fname));
1.1 moko 595: else
596: return false;
597: }
598: rsize=finfo.st_size;
599: ratime=(time_t)finfo.st_atime;
600: rmtime=(time_t)finfo.st_mtime;
601: rctime=(time_t)finfo.st_ctime;
602: return true;
603: }
604:
605: size_t check_file_size(uint64_t size, const String* file_spec){
606: if(size > (uint64_t)pa_file_size_limit)
1.2 moko 607: throw Exception(PARSER_RUNTIME, file_spec, "content size of %s bytes exceeds the limit (%s bytes)", pa_uitoa(size), pa_uitoa(pa_file_size_limit));
1.1 moko 608: return (size_t)size;
609: }
610:
1.3 moko 611: /**
1.1 moko 612: String related functions
613: */
614:
615: const char *pa_filename(const char *path){
616: const char *slash=strrpbrk(path, "/\\");
617: return slash ? slash+1 : path;
618: }
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