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0d2079fa |
1 | #include "EXTERN.h" |
2 | #include "perl.h" |
3 | #include "XSUB.h" |
dfa4e5d3 |
4 | #ifndef NO_PPPORT_H |
bf7c0a3d |
5 | # define NEED_my_strlcpy |
6 | # define NEED_my_strlcat |
4ce45bab |
7 | # include "ppport.h" |
8 | #endif |
0d2079fa |
9 | |
c70498c1 |
10 | #ifdef I_UNISTD |
11 | # include <unistd.h> |
12 | #endif |
13 | |
bf7c0a3d |
14 | /* The realpath() implementation from OpenBSD 3.9 to 4.2 (realpath.c 1.13) |
03d70c89 |
15 | * Renamed here to bsd_realpath() to avoid library conflicts. |
99f36a73 |
16 | */ |
17 | |
18 | /* See |
19 | * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2004-11/msg00979.html |
20 | * for the details of why the BSD license is compatible with the |
21 | * AL/GPL standard perl license. |
22 | */ |
03d70c89 |
23 | |
24 | /* |
bf7c0a3d |
25 | * Copyright (c) 2003 Constantin S. Svintsoff <kostik@iclub.nsu.ru> |
03d70c89 |
26 | * |
27 | * Redistribution and use in source and binary forms, with or without |
28 | * modification, are permitted provided that the following conditions |
29 | * are met: |
30 | * 1. Redistributions of source code must retain the above copyright |
31 | * notice, this list of conditions and the following disclaimer. |
32 | * 2. Redistributions in binary form must reproduce the above copyright |
33 | * notice, this list of conditions and the following disclaimer in the |
34 | * documentation and/or other materials provided with the distribution. |
bf7c0a3d |
35 | * 3. The names of the authors may not be used to endorse or promote |
36 | * products derived from this software without specific prior written |
37 | * permission. |
03d70c89 |
38 | * |
bf7c0a3d |
39 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
03d70c89 |
40 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
bf7c0a3d |
42 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
03d70c89 |
43 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
44 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
45 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
46 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
47 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
48 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
49 | * SUCH DAMAGE. |
50 | */ |
51 | |
03d70c89 |
52 | /* OpenBSD system #includes removed since the Perl ones should do. --jhi */ |
53 | |
54 | #ifndef MAXSYMLINKS |
55 | #define MAXSYMLINKS 8 |
56 | #endif |
57 | |
58 | /* |
bf7c0a3d |
59 | * char *realpath(const char *path, char resolved[MAXPATHLEN]); |
03d70c89 |
60 | * |
61 | * Find the real name of path, by removing all ".", ".." and symlink |
62 | * components. Returns (resolved) on success, or (NULL) on failure, |
63 | * in which case the path which caused trouble is left in (resolved). |
64 | */ |
65 | static |
66 | char * |
c7304ea2 |
67 | bsd_realpath(const char *path, char resolved[MAXPATHLEN]) |
03d70c89 |
68 | { |
e3d944f4 |
69 | #ifdef VMS |
32af7c23 |
70 | dTHX; |
71 | return Perl_rmsexpand(aTHX_ (char*)path, resolved, NULL, 0); |
e3d944f4 |
72 | #else |
c7304ea2 |
73 | char *p, *q, *s; |
74 | size_t left_len, resolved_len; |
75 | unsigned symlinks; |
76 | int serrno; |
77 | char left[MAXPATHLEN], next_token[MAXPATHLEN], symlink[MAXPATHLEN]; |
03d70c89 |
78 | |
c7304ea2 |
79 | serrno = errno; |
80 | symlinks = 0; |
81 | if (path[0] == '/') { |
82 | resolved[0] = '/'; |
83 | resolved[1] = '\0'; |
84 | if (path[1] == '\0') |
85 | return (resolved); |
86 | resolved_len = 1; |
87 | left_len = my_strlcpy(left, path + 1, sizeof(left)); |
88 | } else { |
89 | if (getcwd(resolved, MAXPATHLEN) == NULL) { |
90 | my_strlcpy(resolved, ".", MAXPATHLEN); |
03d70c89 |
91 | return (NULL); |
92 | } |
c7304ea2 |
93 | resolved_len = strlen(resolved); |
94 | left_len = my_strlcpy(left, path, sizeof(left)); |
95 | } |
96 | if (left_len >= sizeof(left) || resolved_len >= MAXPATHLEN) { |
97 | errno = ENAMETOOLONG; |
e3d944f4 |
98 | return (NULL); |
99 | } |
03d70c89 |
100 | |
101 | /* |
c7304ea2 |
102 | * Iterate over path components in `left'. |
03d70c89 |
103 | */ |
c7304ea2 |
104 | while (left_len != 0) { |
105 | /* |
106 | * Extract the next path component and adjust `left' |
107 | * and its length. |
108 | */ |
109 | p = strchr(left, '/'); |
110 | s = p ? p : left + left_len; |
111 | if (s - left >= sizeof(next_token)) { |
112 | errno = ENAMETOOLONG; |
113 | return (NULL); |
03d70c89 |
114 | } |
c7304ea2 |
115 | memcpy(next_token, left, s - left); |
116 | next_token[s - left] = '\0'; |
117 | left_len -= s - left; |
118 | if (p != NULL) |
119 | memmove(left, s + 1, left_len + 1); |
120 | if (resolved[resolved_len - 1] != '/') { |
121 | if (resolved_len + 1 >= MAXPATHLEN) { |
122 | errno = ENAMETOOLONG; |
123 | return (NULL); |
03d70c89 |
124 | } |
c7304ea2 |
125 | resolved[resolved_len++] = '/'; |
126 | resolved[resolved_len] = '\0'; |
03d70c89 |
127 | } |
c7304ea2 |
128 | if (next_token[0] == '\0') |
129 | continue; |
130 | else if (strcmp(next_token, ".") == 0) |
131 | continue; |
132 | else if (strcmp(next_token, "..") == 0) { |
133 | /* |
134 | * Strip the last path component except when we have |
135 | * single "/" |
136 | */ |
137 | if (resolved_len > 1) { |
138 | resolved[resolved_len - 1] = '\0'; |
139 | q = strrchr(resolved, '/') + 1; |
140 | *q = '\0'; |
141 | resolved_len = q - resolved; |
142 | } |
143 | continue; |
91f3b821 |
144 | } |
03d70c89 |
145 | |
146 | /* |
c7304ea2 |
147 | * Append the next path component and lstat() it. If |
148 | * lstat() fails we still can return successfully if |
149 | * there are no more path components left. |
03d70c89 |
150 | */ |
c7304ea2 |
151 | resolved_len = my_strlcat(resolved, next_token, MAXPATHLEN); |
152 | if (resolved_len >= MAXPATHLEN) { |
153 | errno = ENAMETOOLONG; |
154 | return (NULL); |
155 | } |
156 | #if defined(HAS_LSTAT) && defined(HAS_READLINK) && defined(HAS_SYMLINK) |
157 | { |
158 | struct stat sb; |
159 | if (lstat(resolved, &sb) != 0) { |
160 | if (errno == ENOENT && p == NULL) { |
161 | errno = serrno; |
162 | return (resolved); |
163 | } |
164 | return (NULL); |
165 | } |
166 | if (S_ISLNK(sb.st_mode)) { |
167 | int slen; |
168 | |
169 | if (symlinks++ > MAXSYMLINKS) { |
170 | errno = ELOOP; |
171 | return (NULL); |
172 | } |
173 | slen = readlink(resolved, symlink, sizeof(symlink) - 1); |
174 | if (slen < 0) |
175 | return (NULL); |
176 | symlink[slen] = '\0'; |
177 | if (symlink[0] == '/') { |
178 | resolved[1] = 0; |
179 | resolved_len = 1; |
180 | } else if (resolved_len > 1) { |
181 | /* Strip the last path component. */ |
182 | resolved[resolved_len - 1] = '\0'; |
183 | q = strrchr(resolved, '/') + 1; |
184 | *q = '\0'; |
185 | resolved_len = q - resolved; |
186 | } |
03d70c89 |
187 | |
188 | /* |
c7304ea2 |
189 | * If there are any path components left, then |
190 | * append them to symlink. The result is placed |
191 | * in `left'. |
03d70c89 |
192 | */ |
c7304ea2 |
193 | if (p != NULL) { |
194 | if (symlink[slen - 1] != '/') { |
195 | if (slen + 1 >= sizeof(symlink)) { |
03d70c89 |
196 | errno = ENAMETOOLONG; |
c7304ea2 |
197 | return (NULL); |
03d70c89 |
198 | } |
c7304ea2 |
199 | symlink[slen] = '/'; |
200 | symlink[slen + 1] = 0; |
03d70c89 |
201 | } |
c7304ea2 |
202 | left_len = my_strlcat(symlink, left, sizeof(left)); |
203 | if (left_len >= sizeof(left)) { |
204 | errno = ENAMETOOLONG; |
205 | return (NULL); |
03d70c89 |
206 | } |
e3d944f4 |
207 | } |
c7304ea2 |
208 | left_len = my_strlcpy(left, symlink, sizeof(left)); |
209 | } |
210 | } |
211 | #endif |
212 | } |
03d70c89 |
213 | |
c7304ea2 |
214 | /* |
215 | * Remove trailing slash except when the resolved pathname |
216 | * is a single "/". |
217 | */ |
218 | if (resolved_len > 1 && resolved[resolved_len - 1] == '/') |
219 | resolved[resolved_len - 1] = '\0'; |
03d70c89 |
220 | return (resolved); |
e3d944f4 |
221 | #endif |
03d70c89 |
222 | } |
223 | |
99f36a73 |
224 | #ifndef SV_CWD_RETURN_UNDEF |
225 | #define SV_CWD_RETURN_UNDEF \ |
226 | sv_setsv(sv, &PL_sv_undef); \ |
227 | return FALSE |
228 | #endif |
229 | |
230 | #ifndef OPpENTERSUB_HASTARG |
231 | #define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */ |
232 | #endif |
233 | |
234 | #ifndef dXSTARG |
235 | #define dXSTARG SV * targ = ((PL_op->op_private & OPpENTERSUB_HASTARG) \ |
236 | ? PAD_SV(PL_op->op_targ) : sv_newmortal()) |
237 | #endif |
238 | |
239 | #ifndef XSprePUSH |
240 | #define XSprePUSH (sp = PL_stack_base + ax - 1) |
241 | #endif |
242 | |
243 | #ifndef SV_CWD_ISDOT |
244 | #define SV_CWD_ISDOT(dp) \ |
245 | (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \ |
246 | (dp->d_name[1] == '.' && dp->d_name[2] == '\0'))) |
247 | #endif |
248 | |
a9939470 |
249 | #ifndef getcwd_sv |
1955c8df |
250 | /* Taken from perl 5.8's util.c */ |
09122b95 |
251 | #define getcwd_sv(a) Perl_getcwd_sv(aTHX_ a) |
252 | int Perl_getcwd_sv(pTHX_ register SV *sv) |
a9939470 |
253 | { |
254 | #ifndef PERL_MICRO |
255 | |
256 | #ifndef INCOMPLETE_TAINTS |
257 | SvTAINTED_on(sv); |
258 | #endif |
259 | |
260 | #ifdef HAS_GETCWD |
261 | { |
262 | char buf[MAXPATHLEN]; |
263 | |
264 | /* Some getcwd()s automatically allocate a buffer of the given |
265 | * size from the heap if they are given a NULL buffer pointer. |
266 | * The problem is that this behaviour is not portable. */ |
267 | if (getcwd(buf, sizeof(buf) - 1)) { |
268 | STRLEN len = strlen(buf); |
269 | sv_setpvn(sv, buf, len); |
270 | return TRUE; |
271 | } |
272 | else { |
273 | sv_setsv(sv, &PL_sv_undef); |
274 | return FALSE; |
275 | } |
276 | } |
277 | |
278 | #else |
f6342b4b |
279 | { |
a9939470 |
280 | Stat_t statbuf; |
281 | int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino; |
282 | int namelen, pathlen=0; |
283 | DIR *dir; |
284 | Direntry_t *dp; |
285 | |
286 | (void)SvUPGRADE(sv, SVt_PV); |
287 | |
288 | if (PerlLIO_lstat(".", &statbuf) < 0) { |
289 | SV_CWD_RETURN_UNDEF; |
290 | } |
291 | |
292 | orig_cdev = statbuf.st_dev; |
293 | orig_cino = statbuf.st_ino; |
294 | cdev = orig_cdev; |
295 | cino = orig_cino; |
296 | |
297 | for (;;) { |
298 | odev = cdev; |
299 | oino = cino; |
300 | |
301 | if (PerlDir_chdir("..") < 0) { |
302 | SV_CWD_RETURN_UNDEF; |
303 | } |
304 | if (PerlLIO_stat(".", &statbuf) < 0) { |
305 | SV_CWD_RETURN_UNDEF; |
306 | } |
307 | |
308 | cdev = statbuf.st_dev; |
309 | cino = statbuf.st_ino; |
310 | |
311 | if (odev == cdev && oino == cino) { |
312 | break; |
313 | } |
314 | if (!(dir = PerlDir_open("."))) { |
315 | SV_CWD_RETURN_UNDEF; |
316 | } |
317 | |
318 | while ((dp = PerlDir_read(dir)) != NULL) { |
319 | #ifdef DIRNAMLEN |
320 | namelen = dp->d_namlen; |
321 | #else |
322 | namelen = strlen(dp->d_name); |
323 | #endif |
324 | /* skip . and .. */ |
325 | if (SV_CWD_ISDOT(dp)) { |
326 | continue; |
327 | } |
328 | |
329 | if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) { |
330 | SV_CWD_RETURN_UNDEF; |
331 | } |
332 | |
333 | tdev = statbuf.st_dev; |
334 | tino = statbuf.st_ino; |
335 | if (tino == oino && tdev == odev) { |
336 | break; |
337 | } |
338 | } |
339 | |
340 | if (!dp) { |
341 | SV_CWD_RETURN_UNDEF; |
342 | } |
343 | |
344 | if (pathlen + namelen + 1 >= MAXPATHLEN) { |
345 | SV_CWD_RETURN_UNDEF; |
346 | } |
347 | |
348 | SvGROW(sv, pathlen + namelen + 1); |
349 | |
350 | if (pathlen) { |
351 | /* shift down */ |
352 | Move(SvPVX(sv), SvPVX(sv) + namelen + 1, pathlen, char); |
353 | } |
354 | |
355 | /* prepend current directory to the front */ |
356 | *SvPVX(sv) = '/'; |
357 | Move(dp->d_name, SvPVX(sv)+1, namelen, char); |
358 | pathlen += (namelen + 1); |
359 | |
360 | #ifdef VOID_CLOSEDIR |
361 | PerlDir_close(dir); |
362 | #else |
363 | if (PerlDir_close(dir) < 0) { |
364 | SV_CWD_RETURN_UNDEF; |
365 | } |
366 | #endif |
367 | } |
368 | |
369 | if (pathlen) { |
370 | SvCUR_set(sv, pathlen); |
371 | *SvEND(sv) = '\0'; |
372 | SvPOK_only(sv); |
373 | |
374 | if (PerlDir_chdir(SvPVX(sv)) < 0) { |
375 | SV_CWD_RETURN_UNDEF; |
376 | } |
377 | } |
378 | if (PerlLIO_stat(".", &statbuf) < 0) { |
379 | SV_CWD_RETURN_UNDEF; |
380 | } |
381 | |
382 | cdev = statbuf.st_dev; |
383 | cino = statbuf.st_ino; |
384 | |
385 | if (cdev != orig_cdev || cino != orig_cino) { |
386 | Perl_croak(aTHX_ "Unstable directory path, " |
387 | "current directory changed unexpectedly"); |
388 | } |
389 | |
390 | return TRUE; |
f6342b4b |
391 | } |
a9939470 |
392 | #endif |
393 | |
394 | #else |
395 | return FALSE; |
396 | #endif |
397 | } |
398 | |
399 | #endif |
400 | |
401 | |
f22d8e4b |
402 | MODULE = Cwd PACKAGE = Cwd |
0d2079fa |
403 | |
f22d8e4b |
404 | PROTOTYPES: ENABLE |
0d2079fa |
405 | |
f22d8e4b |
406 | void |
407 | fastcwd() |
7ddb28a3 |
408 | PROTOTYPE: DISABLE |
f22d8e4b |
409 | PPCODE: |
410 | { |
411 | dXSTARG; |
89423764 |
412 | getcwd_sv(TARG); |
f22d8e4b |
413 | XSprePUSH; PUSHTARG; |
248785eb |
414 | #ifndef INCOMPLETE_TAINTS |
415 | SvTAINTED_on(TARG); |
416 | #endif |
0d2079fa |
417 | } |
418 | |
f22d8e4b |
419 | void |
23bb49fa |
420 | getcwd(...) |
fa52125f |
421 | PROTOTYPE: DISABLE |
422 | PPCODE: |
423 | { |
424 | dXSTARG; |
425 | getcwd_sv(TARG); |
426 | XSprePUSH; PUSHTARG; |
427 | #ifndef INCOMPLETE_TAINTS |
428 | SvTAINTED_on(TARG); |
429 | #endif |
430 | } |
431 | |
432 | void |
03d70c89 |
433 | abs_path(pathsv=Nullsv) |
434 | SV *pathsv |
99f36a73 |
435 | PROTOTYPE: DISABLE |
f22d8e4b |
436 | PPCODE: |
2ae52c40 |
437 | { |
f22d8e4b |
438 | dXSTARG; |
439 | char *path; |
00536bfc |
440 | char buf[MAXPATHLEN]; |
03d70c89 |
441 | |
07409e01 |
442 | path = pathsv ? SvPV_nolen(pathsv) : (char *)"."; |
03d70c89 |
443 | |
00536bfc |
444 | if (bsd_realpath(path, buf)) { |
445 | sv_setpvn(TARG, buf, strlen(buf)); |
446 | SvPOK_only(TARG); |
ea715489 |
447 | SvTAINTED_on(TARG); |
2ae52c40 |
448 | } |
03d70c89 |
449 | else |
ea715489 |
450 | sv_setsv(TARG, &PL_sv_undef); |
2ae52c40 |
451 | |
f22d8e4b |
452 | XSprePUSH; PUSHTARG; |
ea715489 |
453 | #ifndef INCOMPLETE_TAINTS |
454 | SvTAINTED_on(TARG); |
455 | #endif |
2ae52c40 |
456 | } |
09122b95 |
457 | |
42d1cefd |
458 | #if defined(WIN32) && !defined(UNDER_CE) |
09122b95 |
459 | |
460 | void |
461 | getdcwd(...) |
462 | PPCODE: |
463 | { |
464 | dXSTARG; |
465 | int drive; |
466 | char *dir; |
467 | |
468 | /* Drive 0 is the current drive, 1 is A:, 2 is B:, 3 is C: and so on. */ |
469 | if ( items == 0 || |
470 | (items == 1 && (!SvOK(ST(0)) || (SvPOK(ST(0)) && !SvCUR(ST(0)))))) |
471 | drive = 0; |
472 | else if (items == 1 && SvPOK(ST(0)) && SvCUR(ST(0)) && |
473 | isALPHA(SvPVX(ST(0))[0])) |
474 | drive = toUPPER(SvPVX(ST(0))[0]) - 'A' + 1; |
475 | else |
476 | croak("Usage: getdcwd(DRIVE)"); |
477 | |
275e8705 |
478 | New(0,dir,MAXPATHLEN,char); |
479 | if (_getdcwd(drive, dir, MAXPATHLEN)) { |
09122b95 |
480 | sv_setpvn(TARG, dir, strlen(dir)); |
09122b95 |
481 | SvPOK_only(TARG); |
482 | } |
483 | else |
484 | sv_setsv(TARG, &PL_sv_undef); |
485 | |
99f36a73 |
486 | Safefree(dir); |
487 | |
09122b95 |
488 | XSprePUSH; PUSHTARG; |
489 | #ifndef INCOMPLETE_TAINTS |
490 | SvTAINTED_on(TARG); |
491 | #endif |
492 | } |
493 | |
494 | #endif |