Commit | Line | Data |
0d2079fa |
1 | #include "EXTERN.h" |
2 | #include "perl.h" |
3 | #include "XSUB.h" |
9bc94e3d |
4 | #define NEED_my_strlcpy |
5 | #define NEED_my_strlcat |
6 | #include "ppport.h" |
0d2079fa |
7 | |
c70498c1 |
8 | #ifdef I_UNISTD |
9 | # include <unistd.h> |
10 | #endif |
11 | |
bf7c0a3d |
12 | /* The realpath() implementation from OpenBSD 3.9 to 4.2 (realpath.c 1.13) |
03d70c89 |
13 | * Renamed here to bsd_realpath() to avoid library conflicts. |
99f36a73 |
14 | */ |
15 | |
16 | /* See |
17 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2004-11/msg00979.html |
18 | * for the details of why the BSD license is compatible with the |
19 | * AL/GPL standard perl license. |
20 | */ |
03d70c89 |
21 | |
22 | /* |
bf7c0a3d |
23 | * Copyright (c) 2003 Constantin S. Svintsoff <kostik@iclub.nsu.ru> |
03d70c89 |
24 | * |
25 | * Redistribution and use in source and binary forms, with or without |
26 | * modification, are permitted provided that the following conditions |
27 | * are met: |
28 | * 1. Redistributions of source code must retain the above copyright |
29 | * notice, this list of conditions and the following disclaimer. |
30 | * 2. Redistributions in binary form must reproduce the above copyright |
31 | * notice, this list of conditions and the following disclaimer in the |
32 | * documentation and/or other materials provided with the distribution. |
bf7c0a3d |
33 | * 3. The names of the authors may not be used to endorse or promote |
34 | * products derived from this software without specific prior written |
35 | * permission. |
03d70c89 |
36 | * |
bf7c0a3d |
37 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
03d70c89 |
38 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
39 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
bf7c0a3d |
40 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
03d70c89 |
41 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
42 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
43 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
44 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
45 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
46 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
47 | * SUCH DAMAGE. |
48 | */ |
49 | |
03d70c89 |
50 | /* OpenBSD system #includes removed since the Perl ones should do. --jhi */ |
51 | |
52 | #ifndef MAXSYMLINKS |
53 | #define MAXSYMLINKS 8 |
54 | #endif |
55 | |
56 | /* |
bf7c0a3d |
57 | * char *realpath(const char *path, char resolved[MAXPATHLEN]); |
03d70c89 |
58 | * |
59 | * Find the real name of path, by removing all ".", ".." and symlink |
60 | * components. Returns (resolved) on success, or (NULL) on failure, |
61 | * in which case the path which caused trouble is left in (resolved). |
62 | */ |
63 | static |
64 | char * |
c7304ea2 |
65 | bsd_realpath(const char *path, char resolved[MAXPATHLEN]) |
03d70c89 |
66 | { |
e3d944f4 |
67 | #ifdef VMS |
32af7c23 |
68 | dTHX; |
69 | return Perl_rmsexpand(aTHX_ (char*)path, resolved, NULL, 0); |
e3d944f4 |
70 | #else |
c7304ea2 |
71 | char *p, *q, *s; |
72 | size_t left_len, resolved_len; |
73 | unsigned symlinks; |
74 | int serrno; |
75 | char left[MAXPATHLEN], next_token[MAXPATHLEN], symlink[MAXPATHLEN]; |
03d70c89 |
76 | |
c7304ea2 |
77 | serrno = errno; |
78 | symlinks = 0; |
79 | if (path[0] == '/') { |
80 | resolved[0] = '/'; |
81 | resolved[1] = '\0'; |
82 | if (path[1] == '\0') |
83 | return (resolved); |
84 | resolved_len = 1; |
85 | left_len = my_strlcpy(left, path + 1, sizeof(left)); |
86 | } else { |
87 | if (getcwd(resolved, MAXPATHLEN) == NULL) { |
88 | my_strlcpy(resolved, ".", MAXPATHLEN); |
03d70c89 |
89 | return (NULL); |
90 | } |
c7304ea2 |
91 | resolved_len = strlen(resolved); |
92 | left_len = my_strlcpy(left, path, sizeof(left)); |
93 | } |
94 | if (left_len >= sizeof(left) || resolved_len >= MAXPATHLEN) { |
95 | errno = ENAMETOOLONG; |
e3d944f4 |
96 | return (NULL); |
97 | } |
03d70c89 |
98 | |
99 | /* |
c7304ea2 |
100 | * Iterate over path components in `left'. |
03d70c89 |
101 | */ |
c7304ea2 |
102 | while (left_len != 0) { |
103 | /* |
104 | * Extract the next path component and adjust `left' |
105 | * and its length. |
106 | */ |
107 | p = strchr(left, '/'); |
108 | s = p ? p : left + left_len; |
109 | if (s - left >= sizeof(next_token)) { |
110 | errno = ENAMETOOLONG; |
111 | return (NULL); |
03d70c89 |
112 | } |
c7304ea2 |
113 | memcpy(next_token, left, s - left); |
114 | next_token[s - left] = '\0'; |
115 | left_len -= s - left; |
116 | if (p != NULL) |
117 | memmove(left, s + 1, left_len + 1); |
118 | if (resolved[resolved_len - 1] != '/') { |
119 | if (resolved_len + 1 >= MAXPATHLEN) { |
120 | errno = ENAMETOOLONG; |
121 | return (NULL); |
03d70c89 |
122 | } |
c7304ea2 |
123 | resolved[resolved_len++] = '/'; |
124 | resolved[resolved_len] = '\0'; |
03d70c89 |
125 | } |
c7304ea2 |
126 | if (next_token[0] == '\0') |
127 | continue; |
128 | else if (strcmp(next_token, ".") == 0) |
129 | continue; |
130 | else if (strcmp(next_token, "..") == 0) { |
131 | /* |
132 | * Strip the last path component except when we have |
133 | * single "/" |
134 | */ |
135 | if (resolved_len > 1) { |
136 | resolved[resolved_len - 1] = '\0'; |
137 | q = strrchr(resolved, '/') + 1; |
138 | *q = '\0'; |
139 | resolved_len = q - resolved; |
140 | } |
141 | continue; |
91f3b821 |
142 | } |
03d70c89 |
143 | |
144 | /* |
c7304ea2 |
145 | * Append the next path component and lstat() it. If |
146 | * lstat() fails we still can return successfully if |
147 | * there are no more path components left. |
03d70c89 |
148 | */ |
c7304ea2 |
149 | resolved_len = my_strlcat(resolved, next_token, MAXPATHLEN); |
150 | if (resolved_len >= MAXPATHLEN) { |
151 | errno = ENAMETOOLONG; |
152 | return (NULL); |
153 | } |
154 | #if defined(HAS_LSTAT) && defined(HAS_READLINK) && defined(HAS_SYMLINK) |
155 | { |
156 | struct stat sb; |
157 | if (lstat(resolved, &sb) != 0) { |
158 | if (errno == ENOENT && p == NULL) { |
159 | errno = serrno; |
160 | return (resolved); |
161 | } |
162 | return (NULL); |
163 | } |
164 | if (S_ISLNK(sb.st_mode)) { |
165 | int slen; |
166 | |
167 | if (symlinks++ > MAXSYMLINKS) { |
168 | errno = ELOOP; |
169 | return (NULL); |
170 | } |
171 | slen = readlink(resolved, symlink, sizeof(symlink) - 1); |
172 | if (slen < 0) |
173 | return (NULL); |
174 | symlink[slen] = '\0'; |
175 | if (symlink[0] == '/') { |
176 | resolved[1] = 0; |
177 | resolved_len = 1; |
178 | } else if (resolved_len > 1) { |
179 | /* Strip the last path component. */ |
180 | resolved[resolved_len - 1] = '\0'; |
181 | q = strrchr(resolved, '/') + 1; |
182 | *q = '\0'; |
183 | resolved_len = q - resolved; |
184 | } |
03d70c89 |
185 | |
186 | /* |
c7304ea2 |
187 | * If there are any path components left, then |
188 | * append them to symlink. The result is placed |
189 | * in `left'. |
03d70c89 |
190 | */ |
c7304ea2 |
191 | if (p != NULL) { |
192 | if (symlink[slen - 1] != '/') { |
193 | if (slen + 1 >= sizeof(symlink)) { |
03d70c89 |
194 | errno = ENAMETOOLONG; |
c7304ea2 |
195 | return (NULL); |
03d70c89 |
196 | } |
c7304ea2 |
197 | symlink[slen] = '/'; |
198 | symlink[slen + 1] = 0; |
03d70c89 |
199 | } |
c7304ea2 |
200 | left_len = my_strlcat(symlink, left, sizeof(left)); |
201 | if (left_len >= sizeof(left)) { |
202 | errno = ENAMETOOLONG; |
203 | return (NULL); |
03d70c89 |
204 | } |
e3d944f4 |
205 | } |
c7304ea2 |
206 | left_len = my_strlcpy(left, symlink, sizeof(left)); |
207 | } |
208 | } |
209 | #endif |
210 | } |
03d70c89 |
211 | |
c7304ea2 |
212 | /* |
213 | * Remove trailing slash except when the resolved pathname |
214 | * is a single "/". |
215 | */ |
216 | if (resolved_len > 1 && resolved[resolved_len - 1] == '/') |
217 | resolved[resolved_len - 1] = '\0'; |
03d70c89 |
218 | return (resolved); |
e3d944f4 |
219 | #endif |
03d70c89 |
220 | } |
221 | |
99f36a73 |
222 | #ifndef SV_CWD_RETURN_UNDEF |
223 | #define SV_CWD_RETURN_UNDEF \ |
224 | sv_setsv(sv, &PL_sv_undef); \ |
225 | return FALSE |
226 | #endif |
227 | |
228 | #ifndef OPpENTERSUB_HASTARG |
229 | #define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */ |
230 | #endif |
231 | |
232 | #ifndef dXSTARG |
233 | #define dXSTARG SV * targ = ((PL_op->op_private & OPpENTERSUB_HASTARG) \ |
234 | ? PAD_SV(PL_op->op_targ) : sv_newmortal()) |
235 | #endif |
236 | |
237 | #ifndef XSprePUSH |
238 | #define XSprePUSH (sp = PL_stack_base + ax - 1) |
239 | #endif |
240 | |
241 | #ifndef SV_CWD_ISDOT |
242 | #define SV_CWD_ISDOT(dp) \ |
243 | (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \ |
244 | (dp->d_name[1] == '.' && dp->d_name[2] == '\0'))) |
245 | #endif |
246 | |
a9939470 |
247 | #ifndef getcwd_sv |
1955c8df |
248 | /* Taken from perl 5.8's util.c */ |
09122b95 |
249 | #define getcwd_sv(a) Perl_getcwd_sv(aTHX_ a) |
250 | int Perl_getcwd_sv(pTHX_ register SV *sv) |
a9939470 |
251 | { |
252 | #ifndef PERL_MICRO |
253 | |
254 | #ifndef INCOMPLETE_TAINTS |
255 | SvTAINTED_on(sv); |
256 | #endif |
257 | |
258 | #ifdef HAS_GETCWD |
259 | { |
260 | char buf[MAXPATHLEN]; |
261 | |
262 | /* Some getcwd()s automatically allocate a buffer of the given |
263 | * size from the heap if they are given a NULL buffer pointer. |
264 | * The problem is that this behaviour is not portable. */ |
265 | if (getcwd(buf, sizeof(buf) - 1)) { |
266 | STRLEN len = strlen(buf); |
267 | sv_setpvn(sv, buf, len); |
268 | return TRUE; |
269 | } |
270 | else { |
271 | sv_setsv(sv, &PL_sv_undef); |
272 | return FALSE; |
273 | } |
274 | } |
275 | |
276 | #else |
f6342b4b |
277 | { |
a9939470 |
278 | Stat_t statbuf; |
279 | int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino; |
280 | int namelen, pathlen=0; |
281 | DIR *dir; |
282 | Direntry_t *dp; |
283 | |
284 | (void)SvUPGRADE(sv, SVt_PV); |
285 | |
286 | if (PerlLIO_lstat(".", &statbuf) < 0) { |
287 | SV_CWD_RETURN_UNDEF; |
288 | } |
289 | |
290 | orig_cdev = statbuf.st_dev; |
291 | orig_cino = statbuf.st_ino; |
292 | cdev = orig_cdev; |
293 | cino = orig_cino; |
294 | |
295 | for (;;) { |
296 | odev = cdev; |
297 | oino = cino; |
298 | |
299 | if (PerlDir_chdir("..") < 0) { |
300 | SV_CWD_RETURN_UNDEF; |
301 | } |
302 | if (PerlLIO_stat(".", &statbuf) < 0) { |
303 | SV_CWD_RETURN_UNDEF; |
304 | } |
305 | |
306 | cdev = statbuf.st_dev; |
307 | cino = statbuf.st_ino; |
308 | |
309 | if (odev == cdev && oino == cino) { |
310 | break; |
311 | } |
312 | if (!(dir = PerlDir_open("."))) { |
313 | SV_CWD_RETURN_UNDEF; |
314 | } |
315 | |
316 | while ((dp = PerlDir_read(dir)) != NULL) { |
317 | #ifdef DIRNAMLEN |
318 | namelen = dp->d_namlen; |
319 | #else |
320 | namelen = strlen(dp->d_name); |
321 | #endif |
322 | /* skip . and .. */ |
323 | if (SV_CWD_ISDOT(dp)) { |
324 | continue; |
325 | } |
326 | |
327 | if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) { |
328 | SV_CWD_RETURN_UNDEF; |
329 | } |
330 | |
331 | tdev = statbuf.st_dev; |
332 | tino = statbuf.st_ino; |
333 | if (tino == oino && tdev == odev) { |
334 | break; |
335 | } |
336 | } |
337 | |
338 | if (!dp) { |
339 | SV_CWD_RETURN_UNDEF; |
340 | } |
341 | |
342 | if (pathlen + namelen + 1 >= MAXPATHLEN) { |
343 | SV_CWD_RETURN_UNDEF; |
344 | } |
345 | |
346 | SvGROW(sv, pathlen + namelen + 1); |
347 | |
348 | if (pathlen) { |
349 | /* shift down */ |
350 | Move(SvPVX(sv), SvPVX(sv) + namelen + 1, pathlen, char); |
351 | } |
352 | |
353 | /* prepend current directory to the front */ |
354 | *SvPVX(sv) = '/'; |
355 | Move(dp->d_name, SvPVX(sv)+1, namelen, char); |
356 | pathlen += (namelen + 1); |
357 | |
358 | #ifdef VOID_CLOSEDIR |
359 | PerlDir_close(dir); |
360 | #else |
361 | if (PerlDir_close(dir) < 0) { |
362 | SV_CWD_RETURN_UNDEF; |
363 | } |
364 | #endif |
365 | } |
366 | |
367 | if (pathlen) { |
368 | SvCUR_set(sv, pathlen); |
369 | *SvEND(sv) = '\0'; |
370 | SvPOK_only(sv); |
371 | |
372 | if (PerlDir_chdir(SvPVX(sv)) < 0) { |
373 | SV_CWD_RETURN_UNDEF; |
374 | } |
375 | } |
376 | if (PerlLIO_stat(".", &statbuf) < 0) { |
377 | SV_CWD_RETURN_UNDEF; |
378 | } |
379 | |
380 | cdev = statbuf.st_dev; |
381 | cino = statbuf.st_ino; |
382 | |
383 | if (cdev != orig_cdev || cino != orig_cino) { |
384 | Perl_croak(aTHX_ "Unstable directory path, " |
385 | "current directory changed unexpectedly"); |
386 | } |
387 | |
388 | return TRUE; |
f6342b4b |
389 | } |
a9939470 |
390 | #endif |
391 | |
392 | #else |
393 | return FALSE; |
394 | #endif |
395 | } |
396 | |
397 | #endif |
398 | |
399 | |
f22d8e4b |
400 | MODULE = Cwd PACKAGE = Cwd |
0d2079fa |
401 | |
f22d8e4b |
402 | PROTOTYPES: ENABLE |
0d2079fa |
403 | |
f22d8e4b |
404 | void |
405 | fastcwd() |
7ddb28a3 |
406 | PROTOTYPE: DISABLE |
f22d8e4b |
407 | PPCODE: |
408 | { |
409 | dXSTARG; |
89423764 |
410 | getcwd_sv(TARG); |
f22d8e4b |
411 | XSprePUSH; PUSHTARG; |
248785eb |
412 | #ifndef INCOMPLETE_TAINTS |
413 | SvTAINTED_on(TARG); |
414 | #endif |
0d2079fa |
415 | } |
416 | |
f22d8e4b |
417 | void |
23bb49fa |
418 | getcwd(...) |
fa52125f |
419 | PROTOTYPE: DISABLE |
420 | PPCODE: |
421 | { |
422 | dXSTARG; |
423 | getcwd_sv(TARG); |
424 | XSprePUSH; PUSHTARG; |
425 | #ifndef INCOMPLETE_TAINTS |
426 | SvTAINTED_on(TARG); |
427 | #endif |
428 | } |
429 | |
430 | void |
03d70c89 |
431 | abs_path(pathsv=Nullsv) |
432 | SV *pathsv |
99f36a73 |
433 | PROTOTYPE: DISABLE |
f22d8e4b |
434 | PPCODE: |
2ae52c40 |
435 | { |
f22d8e4b |
436 | dXSTARG; |
437 | char *path; |
00536bfc |
438 | char buf[MAXPATHLEN]; |
03d70c89 |
439 | |
07409e01 |
440 | path = pathsv ? SvPV_nolen(pathsv) : (char *)"."; |
03d70c89 |
441 | |
00536bfc |
442 | if (bsd_realpath(path, buf)) { |
443 | sv_setpvn(TARG, buf, strlen(buf)); |
444 | SvPOK_only(TARG); |
ea715489 |
445 | SvTAINTED_on(TARG); |
2ae52c40 |
446 | } |
03d70c89 |
447 | else |
ea715489 |
448 | sv_setsv(TARG, &PL_sv_undef); |
2ae52c40 |
449 | |
f22d8e4b |
450 | XSprePUSH; PUSHTARG; |
ea715489 |
451 | #ifndef INCOMPLETE_TAINTS |
452 | SvTAINTED_on(TARG); |
453 | #endif |
2ae52c40 |
454 | } |
09122b95 |
455 | |
42d1cefd |
456 | #if defined(WIN32) && !defined(UNDER_CE) |
09122b95 |
457 | |
458 | void |
459 | getdcwd(...) |
460 | PPCODE: |
461 | { |
462 | dXSTARG; |
463 | int drive; |
464 | char *dir; |
465 | |
466 | /* Drive 0 is the current drive, 1 is A:, 2 is B:, 3 is C: and so on. */ |
467 | if ( items == 0 || |
468 | (items == 1 && (!SvOK(ST(0)) || (SvPOK(ST(0)) && !SvCUR(ST(0)))))) |
469 | drive = 0; |
470 | else if (items == 1 && SvPOK(ST(0)) && SvCUR(ST(0)) && |
471 | isALPHA(SvPVX(ST(0))[0])) |
472 | drive = toUPPER(SvPVX(ST(0))[0]) - 'A' + 1; |
473 | else |
474 | croak("Usage: getdcwd(DRIVE)"); |
475 | |
275e8705 |
476 | New(0,dir,MAXPATHLEN,char); |
477 | if (_getdcwd(drive, dir, MAXPATHLEN)) { |
09122b95 |
478 | sv_setpvn(TARG, dir, strlen(dir)); |
09122b95 |
479 | SvPOK_only(TARG); |
480 | } |
481 | else |
482 | sv_setsv(TARG, &PL_sv_undef); |
483 | |
99f36a73 |
484 | Safefree(dir); |
485 | |
09122b95 |
486 | XSprePUSH; PUSHTARG; |
487 | #ifndef INCOMPLETE_TAINTS |
488 | SvTAINTED_on(TARG); |
489 | #endif |
490 | } |
491 | |
492 | #endif |