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1 | /* | |
2 | ** LCLint - annotation-assisted static program checker | |
3 | ** Copyright (C) 1994-2001 University of Virginia, | |
4 | ** Massachusetts Institute of Technology | |
5 | ** | |
6 | ** This program is free software; you can redistribute it and/or modify it | |
7 | ** under the terms of the GNU General Public License as published by the | |
8 | ** Free Software Foundation; either version 2 of the License, or (at your | |
9 | ** option) any later version. | |
10 | ** | |
11 | ** This program is distributed in the hope that it will be useful, but | |
12 | ** WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | ** General Public License for more details. | |
15 | ** | |
16 | ** The GNU General Public License is available from http://www.gnu.org/ or | |
17 | ** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
18 | ** MA 02111-1307, USA. | |
19 | ** | |
20 | ** For information on lclint: lclint-request@cs.virginia.edu | |
21 | ** To report a bug: lclint-bug@cs.virginia.edu | |
22 | ** For more information: http://lclint.cs.virginia.edu | |
23 | */ | |
24 | /* | |
25 | ** osd.c | |
26 | ** | |
27 | ** Provide a system-independent interface to system-dependent | |
28 | ** file operations. | |
29 | */ | |
30 | ||
31 | /* | |
32 | * Modified by Herbert 04/19/97: | |
33 | * - added conditional 'OS2' to conditional 'MSDOS' | |
34 | * - added include of new header portab.h. | |
35 | * - changed '/' to macro. | |
36 | * - added DOS / OS/2 specific stuff in osd_getPath. | |
37 | * Herbert 06/12/2000: | |
38 | * - added OS/2 specific includes before osd_getPid() | |
39 | * - handle files like in WIN32 for OS/2 in osd_fileExists() | |
40 | */ | |
41 | ||
42 | /*@-allmacros*/ | |
43 | /*@ignore@*/ | |
44 | # include <sys/types.h> | |
45 | # include <sys/stat.h> | |
46 | /* Fix suggested by Lars Rasmussen */ | |
47 | # include <errno.h> | |
48 | /*@end@*/ | |
49 | /*@=allmacros*/ | |
50 | # include "lclintMacros.nf" | |
51 | # include "basic.h" | |
52 | # include "osd.h" | |
53 | # include "portab.h" | |
54 | ||
55 | /* from stat.h */ | |
56 | /*@ignore@*/ | |
57 | extern int stat (const char *, /*@out@*/ struct stat *); | |
58 | /*@end@*/ | |
59 | ||
60 | static bool osd_executableFileExists (char *); | |
61 | ||
62 | static bool nextdir (char **p_current_dir, /*@out@*/ char **p_dir, | |
63 | /*@out@*/ size_t *p_len); | |
64 | ||
65 | extern cstring LSLRootName (cstring filespec) | |
66 | { | |
67 | /*@access cstring@*/ | |
68 | char *result, *startName, *tail; | |
69 | size_t nameLength; | |
70 | ||
71 | llassert (cstring_isDefined (filespec)); | |
72 | tail = strrchr (filespec, CONNECTCHAR); | |
73 | startName = (tail == NULL ? filespec : &tail[1]); | |
74 | tail = strrchr (startName, '.'); | |
75 | nameLength = (tail == NULL ? strlen (startName) | |
76 | : size_fromInt (tail - startName)); | |
77 | result = dmalloc (nameLength + 1); | |
78 | strncpy (result, startName, nameLength); | |
79 | result[(int) nameLength] = '\0'; | |
80 | return result; | |
81 | /*@noaccess cstring@*/ | |
82 | } | |
83 | ||
84 | extern /*@observer@*/ cstring | |
85 | osd_getEnvironment (cstring env, /*@returned@*/ cstring def) | |
86 | { | |
87 | /*@access cstring@*/ | |
88 | char *ret = osd_getEnvironmentVariable (env); | |
89 | ||
90 | if (ret == NULL) | |
91 | { | |
92 | return def; | |
93 | } | |
94 | else | |
95 | { | |
96 | return ret; | |
97 | } | |
98 | /*@noaccess cstring@*/ | |
99 | } | |
100 | ||
101 | ||
102 | /* | |
103 | **++ | |
104 | ** FUNCTIONAL DESCRIPTION: | |
105 | ** | |
106 | ** This function attempts to locate a file in a search list. On VMS, it | |
107 | ** just concatinates the path and file names, and then lets RMS do the | |
108 | ** searching. On Ultrix, it searches for the file on the path. | |
109 | ** | |
110 | ** FORMAL PARAMETERS: | |
111 | ** | |
112 | ** path: search path where to look for the file. | |
113 | ** file: name of file to search for. | |
114 | ** returnPath: if a file is found, this is where the concatenated | |
115 | ** directory and file name are returned. | |
116 | ** | |
117 | ** RETURN VALUE: | |
118 | ** | |
119 | ** OSD_FILEFOUND: the file was found on the search list. | |
120 | ** OSD_FILENOTFOUND the file was not found. | |
121 | ** OSD_PATHTOOLONG the concatenated directory and file name are too | |
122 | ** long. | |
123 | ** | |
124 | ** SIDE EFFECTS: | |
125 | ** | |
126 | ** None | |
127 | ** | |
128 | ** PRECONDITIONS: | |
129 | ** | |
130 | ** Requires that parameters, path and file, are valid C strings. | |
131 | ** | |
132 | ** | |
133 | **-- | |
134 | */ | |
135 | ||
136 | extern /*@observer@*/ cstring osd_getHomeDir () | |
137 | { | |
138 | /* Would something different be better for windows? */ | |
139 | return (osd_getEnvironmentVariable (cstring_makeLiteralTemp ("HOME"))); | |
140 | } | |
141 | ||
142 | filestatus osd_findOnLarchPath (cstring file, cstring *returnPath) | |
143 | { | |
144 | return (osd_getPath (context_getLarchPath (), file, returnPath)); | |
145 | } | |
146 | ||
147 | extern filestatus | |
148 | osd_getPath (cstring path, cstring file, cstring *returnPath) | |
149 | { | |
150 | char *fullPath; | |
151 | char *dirPtr; | |
152 | size_t dirLen; | |
153 | char aPath[MAXPATHLEN]; | |
154 | filestatus rVal = OSD_FILENOTFOUND; /* assume file not found. */ | |
155 | ||
156 | /*@access cstring@*/ | |
157 | ||
158 | fullPath = path; | |
159 | llassert (cstring_isDefined (file)); | |
160 | ||
161 | if (fullPath == NULL | |
162 | || | |
163 | # if defined(OS2) || defined(MSDOS) || defined(WIN32) | |
164 | /* under OS/2 and MSDOS the includePath may be empty, if so, search | |
165 | * the current directory. */ | |
166 | *fullPath == '\0' || | |
167 | (*file == CONNECTCHAR || (file[0] != '\0' && file[1] == ':')) | |
168 | # else | |
169 | (*file == CONNECTCHAR) | |
170 | # endif | |
171 | ) | |
172 | { | |
173 | /* No path specified. Look for it in the current directory. */ | |
174 | ||
175 | strcpy (&aPath[0], file); | |
176 | ||
177 | if (osd_fileExists (&aPath[0])) | |
178 | { | |
179 | rVal = OSD_FILEFOUND; | |
180 | *returnPath = dmalloc (strlen (&aPath[0]) + 1); | |
181 | strcpy (*returnPath, &aPath[0]); | |
182 | } | |
183 | } | |
184 | else | |
185 | { | |
186 | /* Path specified. Loop through directories in path looking for the */ | |
187 | /* first occurrence of the file. */ | |
188 | ||
189 | while (nextdir (&fullPath, &dirPtr, &dirLen) && | |
190 | rVal == OSD_FILENOTFOUND) | |
191 | { | |
192 | if ((dirLen + strlen (file) + 2) <= MAXPATHLEN) | |
193 | { | |
194 | /* Cat directory and filename, and see if file exists. */ | |
195 | strncpy (&aPath[0], dirPtr, dirLen); | |
196 | strcpy (&aPath[0] + dirLen, ""); /* Null terminate aPath. */ | |
197 | strcat (&aPath[0], CONNECTSTR); | |
198 | strcat (&aPath[0], file); | |
199 | ||
200 | if (osd_fileExists (&aPath[0])) | |
201 | { | |
202 | rVal = OSD_FILEFOUND; | |
203 | *returnPath = (char *) dmalloc (strlen (&aPath[0]) + 1); | |
204 | strcpy (*returnPath, &aPath[0]); | |
205 | } | |
206 | } | |
207 | else | |
208 | { | |
209 | rVal = OSD_PATHTOOLONG; | |
210 | } | |
211 | } | |
212 | } | |
213 | ||
214 | return rVal; | |
215 | /*@noaccess cstring@*/ | |
216 | } | |
217 | ||
218 | extern filestatus | |
219 | osd_getExePath (cstring path, cstring file, cstring *returnPath) | |
220 | { | |
221 | char *fullPath; | |
222 | char *dirPtr; | |
223 | size_t dirLen; | |
224 | char aPath[MAXPATHLEN]; | |
225 | filestatus rVal = OSD_FILENOTFOUND; /* assume file not found. */ | |
226 | /*@access cstring@*/ | |
227 | ||
228 | fullPath = osd_getEnvironmentVariable (path); | |
229 | ||
230 | if (fullPath == NULL) | |
231 | { | |
232 | /* No path specified. Look for it in the current directory. */ | |
233 | llassert (cstring_isDefined (file)); | |
234 | strcpy (&aPath[0], file); | |
235 | ||
236 | if (osd_fileExists (&aPath[0])) | |
237 | { | |
238 | rVal = OSD_FILEFOUND; | |
239 | *returnPath = dmalloc (strlen (&aPath[0]) + 1); | |
240 | strcpy (*returnPath, &aPath[0]); | |
241 | } | |
242 | } | |
243 | else | |
244 | { | |
245 | /* | |
246 | ** Path specified. Loop through directories in path looking | |
247 | ** for the first occurrence of the file. | |
248 | */ | |
249 | ||
250 | while (nextdir (&fullPath, &dirPtr, &dirLen) && | |
251 | rVal == OSD_FILENOTFOUND) | |
252 | { | |
253 | llassert (cstring_isDefined (file)); | |
254 | ||
255 | if ((dirLen + cstring_length (file) + 2) <= MAXPATHLEN) | |
256 | { | |
257 | /* Cat directory and filename, and see if file exists. */ | |
258 | strncpy (&aPath[0], dirPtr, dirLen); | |
259 | strcpy (&aPath[0] + dirLen, ""); /* Null terminate aPath. */ | |
260 | strcat (&aPath[0], CONNECTSTR); | |
261 | strcat (&aPath[0], file); | |
262 | ||
263 | if (osd_executableFileExists (&aPath[0])) | |
264 | { | |
265 | rVal = OSD_FILEFOUND; | |
266 | *returnPath = dmalloc (strlen (&aPath[0]) + 1); | |
267 | strcpy (*returnPath, &aPath[0]); | |
268 | } | |
269 | } | |
270 | else | |
271 | { | |
272 | rVal = OSD_PATHTOOLONG; | |
273 | } | |
274 | } | |
275 | } | |
276 | ||
277 | return rVal; | |
278 | /*@noaccess cstring@*/ | |
279 | } | |
280 | ||
281 | bool | |
282 | osd_fileExists (cstring filespec) | |
283 | { | |
284 | # ifdef UNIX | |
285 | struct stat buf; | |
286 | return (stat (cstring_toCharsSafe (filespec), &buf) == 0); | |
287 | # else | |
288 | # if defined (WIN32) || defined (OS2) | |
289 | FILE *test = fopen (cstring_toCharsSafe (filespec), "r"); | |
290 | ||
291 | if (test != NULL) | |
292 | { | |
293 | (void) fclose (test); | |
294 | return TRUE; | |
295 | } | |
296 | else | |
297 | { | |
298 | return FALSE; | |
299 | } | |
300 | # else | |
301 | return FALSE; | |
302 | # endif | |
303 | # endif | |
304 | } | |
305 | ||
306 | bool | |
307 | osd_executableFileExists (/*@unused@*/ char *filespec) | |
308 | { | |
309 | # ifdef UNIX | |
310 | struct stat buf; | |
311 | # if defined(__IBMC__) && defined(OS2) | |
312 | # define S_IFMT (unsigned short)0xFFFF | |
313 | # endif | |
314 | if (stat (filespec, &buf) == 0) | |
315 | { | |
316 | /* mask by file type */ | |
317 | /*@-unrecog@*/ /* S_IFMT is not defined */ | |
318 | if ((buf.st_mode & S_IFMT) != S_IFDIR /*@=unrecog@*/) /* not a directory */ | |
319 | { | |
320 | /* as long as it is an executable file */ | |
321 | # if defined(__IBMC__) && defined(OS2) | |
322 | int com_or_exe_pos = strlen( filespec) - 4; | |
323 | return stricmp( &filespec[com_or_exe_pos], ".exe") == 0 | |
324 | || stricmp( &filespec[com_or_exe_pos], ".com") == 0 | |
325 | || stricmp( &filespec[com_or_exe_pos], ".bat") == 0 | |
326 | || stricmp( &filespec[com_or_exe_pos], ".cmd") == 0; | |
327 | # else | |
328 | return (((buf.st_mode & S_IXUSR) | |
329 | # if !defined(MSDOS) && !defined(OS2) | |
330 | | (buf.st_mode & S_IXGRP) | | |
331 | (buf.st_mode & S_IXOTH) | |
332 | # endif | |
333 | ) != 0); | |
334 | # endif | |
335 | } | |
336 | } | |
337 | ||
338 | # endif | |
339 | return (FALSE); | |
340 | ||
341 | } | |
342 | ||
343 | /* | |
344 | **++ | |
345 | ** FUNCTIONAL DESCRIPTION: | |
346 | ** | |
347 | ** Find the next directory from a directory path. | |
348 | ** | |
349 | ** FORMAL PARAMETERS: | |
350 | ** | |
351 | ** char ** current_dir : | |
352 | ** Points to the current position in the path string. The first time | |
353 | ** you call this routine, this should point to the first character of | |
354 | ** the path. On return, this will be updated to point to the | |
355 | ** terminating \0 or : of the first directory found. You can then pass | |
356 | ** it unchanged for subsequent calls; this routine will correctly skip | |
357 | ** over the :. | |
358 | ** | |
359 | ** char ** dir : | |
360 | ** On exit, this will point to the first character of the directory | |
361 | ** that was found. This will be a pointer directly into the client's | |
362 | ** path string. | |
363 | ** | |
364 | ** unsigned int * len : | |
365 | ** On exit, this will contain the length of the directory that was | |
366 | ** found, not counting any terminating \0 or :. If no directory was | |
367 | ** found, this will be 0. | |
368 | ** | |
369 | ** RETURN VALUE: | |
370 | ** TRUE if we found another directory. | |
371 | ** FALSE otherwise. | |
372 | ** | |
373 | ** DESIGN: | |
374 | ** | |
375 | ** We return a pointer and length, rather than a string, because of a) | |
376 | ** historical reasons; and b) this avoids having to allocate storage. | |
377 | ** | |
378 | ** | |
379 | ** | |
380 | **-- | |
381 | */ | |
382 | ||
383 | static bool | |
384 | nextdir (d_char *current_dir, d_char *dir, size_t *len) | |
385 | { | |
386 | char *tchar; | |
387 | ||
388 | if (**current_dir == '\0') | |
389 | { | |
390 | *len = 0; | |
391 | return FALSE; | |
392 | } | |
393 | ||
394 | *dir = (**current_dir == SEPCHAR ? *current_dir + 1 : *current_dir); | |
395 | ||
396 | /* Find next ':' or end of string */ | |
397 | for (tchar = *dir; *tchar != '\0' && *tchar != SEPCHAR; tchar++) | |
398 | { | |
399 | ; | |
400 | } | |
401 | ||
402 | *current_dir = tchar; | |
403 | *len = size_fromInt (tchar - *dir); | |
404 | return TRUE; | |
405 | } | |
406 | ||
407 | /*@observer@*/ /*@null@*/ cstring osd_getEnvironmentVariable (cstring var) | |
408 | { | |
409 | # if defined(UNIX) || defined(OS) || defined(MSDOS) || defined(WIN32) | |
410 | char *val = getenv (cstring_toCharsSafe (var)); | |
411 | ||
412 | if (val == NULL) | |
413 | { | |
414 | return cstring_undefined; | |
415 | } | |
416 | else | |
417 | { | |
418 | return cstring_makeLiteralTemp (val); | |
419 | } | |
420 | # else | |
421 | return cstring_undefined; | |
422 | # endif | |
423 | } | |
424 | ||
425 | # ifndef NOLCL | |
426 | ||
427 | # ifdef WIN32 | |
428 | extern /*@external@*/ int _flushall (void) /*@modifies fileSystem@*/ ; | |
429 | # endif | |
430 | ||
431 | # ifndef system | |
432 | extern /*@external@*/ int system (const char *) /*@modifies fileSystem@*/ ; | |
433 | # endif | |
434 | int osd_system (cstring cmd) | |
435 | { | |
436 | int res; | |
437 | /* system ("printenv"); */ | |
438 | # ifdef WIN32 | |
439 | (void) _flushall (); | |
440 | # endif | |
441 | ||
442 | res = system (cstring_toCharsSafe (cmd)); | |
443 | return res; | |
444 | } | |
445 | # endif | |
446 | ||
447 | # ifndef unlink | |
448 | /*@-redecl@*/ | |
449 | extern /*@external@*/ int unlink (const char *) /*@modifies fileSystem@*/ ; | |
450 | /*@=redecl@*/ | |
451 | # endif | |
452 | ||
453 | int osd_unlink (cstring fname) | |
454 | { | |
455 | int res; | |
456 | ||
457 | res = unlink (cstring_toCharsSafe (fname)); | |
458 | ||
459 | if (res != 0) | |
460 | { | |
461 | llcontbug (message ("Cannot remove temporary file: %s (%s)", | |
462 | fname, | |
463 | cstring_fromChars (strerror (errno)))); | |
464 | } | |
465 | ||
466 | return res; | |
467 | } | |
468 | ||
469 | # if defined (WIN32) || (defined(OS2) && defined(__IBMC__)) | |
470 | # include <process.h> | |
471 | # elif defined OS2 | |
472 | # include <unistd.h> | |
473 | # endif | |
474 | ||
475 | # if defined (WIN32) || defined (OS2) && defined (__IBMC__) | |
476 | int | |
477 | # else | |
478 | int /* pid_t */ | |
479 | # endif | |
480 | osd_getPid () | |
481 | { | |
482 | # if defined (WIN32) || defined (OS2) && defined (__IBMC__) | |
483 | int pid = _getpid (); | |
484 | # else | |
485 | pid_t pid = getpid (); | |
486 | # endif | |
487 | ||
488 | return (int) pid; | |
489 | } | |
490 | ||
491 | cstring osd_fixDefine (cstring x) | |
492 | { | |
493 | /*@access cstring@*/ | |
494 | llassert (cstring_isDefined (x)); | |
495 | # ifdef UNIX | |
496 | if (strchr (x, '\'') != NULL) { | |
497 | /* | |
498 | ** If there is a single quote, check for <ident>='<string>' and | |
499 | ** produce <ident>=<string> | |
500 | */ | |
501 | ||
502 | char *eqs = strchr (x, '='); | |
503 | ||
504 | if (eqs != NULL) { | |
505 | if (eqs[1] == '\'') { | |
506 | char *endqu = strrchr (x, '\''); | |
507 | ||
508 | if (endqu != NULL) { | |
509 | if (*(endqu - 1) != '\\') { | |
510 | if (*(endqu + 1) == '\0') { | |
511 | cstring res; | |
512 | cstring def; | |
513 | ||
514 | *endqu = '\0'; | |
515 | def = cstring_fromChars (eqs + 2); | |
516 | eqs[1] = '\0'; | |
517 | res = cstring_concat (cstring_fromChars (x), def); | |
518 | return res; | |
519 | } | |
520 | } | |
521 | } | |
522 | } | |
523 | } | |
524 | } | |
525 | ||
526 | # endif | |
527 | ||
528 | return cstring_copy (x); | |
529 | /*@noaccess cstring@*/ | |
530 | } | |
531 | ||
532 | bool osd_fileIsReadable (cstring f) | |
533 | { | |
534 | FILE *fl = fopen (cstring_toCharsSafe (f), "r"); | |
535 | ||
536 | if (fl != (FILE *) 0) | |
537 | { | |
538 | check (fclose (fl) == 0); | |
539 | return (TRUE); | |
540 | } | |
541 | else | |
542 | { | |
543 | return (FALSE); | |
544 | } | |
545 | } | |
546 | ||
547 | bool osd_isConnectChar (char c) | |
548 | { | |
549 | if (c == CONNECTCHAR) | |
550 | { | |
551 | return TRUE; | |
552 | } | |
553 | ||
554 | # ifdef HASALTCONNECTCHAR | |
555 | if (c == ALTCONNECTCHAR) | |
556 | { | |
557 | return TRUE; | |
558 | } | |
559 | # endif | |
560 | ||
561 | return FALSE; | |
562 | } | |
563 |