Commit | Line | Data |
0d2079fa |
1 | #include "EXTERN.h" |
2 | #include "perl.h" |
3 | #include "XSUB.h" |
dfa4e5d3 |
4 | #ifndef NO_PPPORT_H |
4ce45bab |
5 | # define NEED_sv_2pv_nolen |
6 | # include "ppport.h" |
7 | #endif |
0d2079fa |
8 | |
c70498c1 |
9 | #ifdef I_UNISTD |
10 | # include <unistd.h> |
11 | #endif |
12 | |
03d70c89 |
13 | /* The realpath() implementation from OpenBSD 2.9 (realpath.c 1.4) |
14 | * Renamed here to bsd_realpath() to avoid library conflicts. |
99f36a73 |
15 | * --jhi 2000-06-20 |
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 | /* |
25 | * Copyright (c) 1994 |
26 | * The Regents of the University of California. All rights reserved. |
27 | * |
28 | * This code is derived from software contributed to Berkeley by |
29 | * Jan-Simon Pendry. |
30 | * |
31 | * Redistribution and use in source and binary forms, with or without |
32 | * modification, are permitted provided that the following conditions |
33 | * are met: |
34 | * 1. Redistributions of source code must retain the above copyright |
35 | * notice, this list of conditions and the following disclaimer. |
36 | * 2. Redistributions in binary form must reproduce the above copyright |
37 | * notice, this list of conditions and the following disclaimer in the |
38 | * documentation and/or other materials provided with the distribution. |
99f36a73 |
39 | * 3. Neither the name of the University nor the names of its contributors |
03d70c89 |
40 | * may be used to endorse or promote products derived from this software |
41 | * without specific prior written permission. |
42 | * |
43 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
44 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
45 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
46 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
47 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
48 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
49 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
50 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
51 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
52 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
53 | * SUCH DAMAGE. |
54 | */ |
55 | |
56 | #if defined(LIBC_SCCS) && !defined(lint) |
57 | static char *rcsid = "$OpenBSD: realpath.c,v 1.4 1998/05/18 09:55:19 deraadt Exp $"; |
58 | #endif /* LIBC_SCCS and not lint */ |
59 | |
60 | /* OpenBSD system #includes removed since the Perl ones should do. --jhi */ |
61 | |
62 | #ifndef MAXSYMLINKS |
63 | #define MAXSYMLINKS 8 |
64 | #endif |
65 | |
66 | /* |
67 | * char *realpath(const char *path, char resolved_path[MAXPATHLEN]); |
68 | * |
69 | * Find the real name of path, by removing all ".", ".." and symlink |
70 | * components. Returns (resolved) on success, or (NULL) on failure, |
71 | * in which case the path which caused trouble is left in (resolved). |
72 | */ |
73 | static |
74 | char * |
a733a8a0 |
75 | bsd_realpath(const char *path, char *resolved) |
03d70c89 |
76 | { |
e3d944f4 |
77 | #ifdef VMS |
32af7c23 |
78 | dTHX; |
79 | return Perl_rmsexpand(aTHX_ (char*)path, resolved, NULL, 0); |
e3d944f4 |
80 | #else |
91f3b821 |
81 | int rootd, serrno; |
03d70c89 |
82 | char *p, *q, wbuf[MAXPATHLEN]; |
83 | int symlinks = 0; |
84 | |
85 | /* Save the starting point. */ |
e3d944f4 |
86 | #ifdef HAS_FCHDIR |
bae06e14 |
87 | int fd; |
88 | |
03d70c89 |
89 | if ((fd = open(".", O_RDONLY)) < 0) { |
90 | (void)strcpy(resolved, "."); |
91 | return (NULL); |
92 | } |
e3d944f4 |
93 | #else |
94 | char wd[MAXPATHLEN]; |
95 | |
96 | if (getcwd(wd, MAXPATHLEN - 1) == NULL) { |
97 | (void)strcpy(resolved, "."); |
98 | return (NULL); |
99 | } |
100 | #endif |
03d70c89 |
101 | |
102 | /* |
103 | * Find the dirname and basename from the path to be resolved. |
104 | * Change directory to the dirname component. |
105 | * lstat the basename part. |
106 | * if it is a symlink, read in the value and loop. |
107 | * if it is a directory, then change to that directory. |
108 | * get the current directory name and append the basename. |
109 | */ |
110 | (void)strncpy(resolved, path, MAXPATHLEN - 1); |
111 | resolved[MAXPATHLEN - 1] = '\0'; |
112 | loop: |
113 | q = strrchr(resolved, '/'); |
114 | if (q != NULL) { |
115 | p = q + 1; |
116 | if (q == resolved) |
117 | q = "/"; |
118 | else { |
119 | do { |
120 | --q; |
121 | } while (q > resolved && *q == '/'); |
122 | q[1] = '\0'; |
123 | q = resolved; |
124 | } |
125 | if (chdir(q) < 0) |
126 | goto err1; |
127 | } else |
128 | p = resolved; |
129 | |
bae06e14 |
130 | #if defined(HAS_LSTAT) && defined(HAS_READLINK) && defined(HAS_SYMLINK) |
91f3b821 |
131 | { |
132 | struct stat sb; |
03d70c89 |
133 | /* Deal with the last component. */ |
134 | if (lstat(p, &sb) == 0) { |
135 | if (S_ISLNK(sb.st_mode)) { |
91f3b821 |
136 | int n; |
03d70c89 |
137 | if (++symlinks > MAXSYMLINKS) { |
138 | errno = ELOOP; |
139 | goto err1; |
140 | } |
141 | n = readlink(p, resolved, MAXPATHLEN-1); |
142 | if (n < 0) |
143 | goto err1; |
144 | resolved[n] = '\0'; |
145 | goto loop; |
146 | } |
147 | if (S_ISDIR(sb.st_mode)) { |
148 | if (chdir(p) < 0) |
149 | goto err1; |
150 | p = ""; |
151 | } |
152 | } |
91f3b821 |
153 | } |
e3d944f4 |
154 | #endif |
03d70c89 |
155 | |
156 | /* |
157 | * Save the last component name and get the full pathname of |
158 | * the current directory. |
159 | */ |
160 | (void)strcpy(wbuf, p); |
161 | if (getcwd(resolved, MAXPATHLEN) == 0) |
162 | goto err1; |
163 | |
164 | /* |
165 | * Join the two strings together, ensuring that the right thing |
166 | * happens if the last component is empty, or the dirname is root. |
167 | */ |
168 | if (resolved[0] == '/' && resolved[1] == '\0') |
169 | rootd = 1; |
170 | else |
171 | rootd = 0; |
172 | |
173 | if (*wbuf) { |
7f6e23a8 |
174 | if (strlen(resolved) + strlen(wbuf) + (1 - rootd) + 1 > MAXPATHLEN) { |
03d70c89 |
175 | errno = ENAMETOOLONG; |
176 | goto err1; |
177 | } |
178 | if (rootd == 0) |
179 | (void)strcat(resolved, "/"); |
180 | (void)strcat(resolved, wbuf); |
181 | } |
182 | |
183 | /* Go back to where we came from. */ |
e3d944f4 |
184 | #ifdef HAS_FCHDIR |
03d70c89 |
185 | if (fchdir(fd) < 0) { |
186 | serrno = errno; |
187 | goto err2; |
188 | } |
e3d944f4 |
189 | #else |
190 | if (chdir(wd) < 0) { |
191 | serrno = errno; |
192 | goto err2; |
193 | } |
194 | #endif |
03d70c89 |
195 | |
196 | /* It's okay if the close fails, what's an fd more or less? */ |
9cad6237 |
197 | #ifdef HAS_FCHDIR |
03d70c89 |
198 | (void)close(fd); |
9cad6237 |
199 | #endif |
03d70c89 |
200 | return (resolved); |
201 | |
202 | err1: serrno = errno; |
29ab7413 |
203 | #ifdef HAS_FCHDIR |
03d70c89 |
204 | (void)fchdir(fd); |
29ab7413 |
205 | #else |
206 | (void)chdir(wd); |
207 | #endif |
89423764 |
208 | |
209 | err2: |
210 | #ifdef HAS_FCHDIR |
211 | (void)close(fd); |
212 | #endif |
03d70c89 |
213 | errno = serrno; |
214 | return (NULL); |
e3d944f4 |
215 | #endif |
03d70c89 |
216 | } |
217 | |
99f36a73 |
218 | #ifndef SV_CWD_RETURN_UNDEF |
219 | #define SV_CWD_RETURN_UNDEF \ |
220 | sv_setsv(sv, &PL_sv_undef); \ |
221 | return FALSE |
222 | #endif |
223 | |
224 | #ifndef OPpENTERSUB_HASTARG |
225 | #define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */ |
226 | #endif |
227 | |
228 | #ifndef dXSTARG |
229 | #define dXSTARG SV * targ = ((PL_op->op_private & OPpENTERSUB_HASTARG) \ |
230 | ? PAD_SV(PL_op->op_targ) : sv_newmortal()) |
231 | #endif |
232 | |
233 | #ifndef XSprePUSH |
234 | #define XSprePUSH (sp = PL_stack_base + ax - 1) |
235 | #endif |
236 | |
237 | #ifndef SV_CWD_ISDOT |
238 | #define SV_CWD_ISDOT(dp) \ |
239 | (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \ |
240 | (dp->d_name[1] == '.' && dp->d_name[2] == '\0'))) |
241 | #endif |
242 | |
a9939470 |
243 | #ifndef getcwd_sv |
1955c8df |
244 | /* Taken from perl 5.8's util.c */ |
09122b95 |
245 | #define getcwd_sv(a) Perl_getcwd_sv(aTHX_ a) |
246 | int Perl_getcwd_sv(pTHX_ register SV *sv) |
a9939470 |
247 | { |
248 | #ifndef PERL_MICRO |
249 | |
250 | #ifndef INCOMPLETE_TAINTS |
251 | SvTAINTED_on(sv); |
252 | #endif |
253 | |
254 | #ifdef HAS_GETCWD |
255 | { |
256 | char buf[MAXPATHLEN]; |
257 | |
258 | /* Some getcwd()s automatically allocate a buffer of the given |
259 | * size from the heap if they are given a NULL buffer pointer. |
260 | * The problem is that this behaviour is not portable. */ |
261 | if (getcwd(buf, sizeof(buf) - 1)) { |
262 | STRLEN len = strlen(buf); |
263 | sv_setpvn(sv, buf, len); |
264 | return TRUE; |
265 | } |
266 | else { |
267 | sv_setsv(sv, &PL_sv_undef); |
268 | return FALSE; |
269 | } |
270 | } |
271 | |
272 | #else |
f6342b4b |
273 | { |
a9939470 |
274 | Stat_t statbuf; |
275 | int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino; |
276 | int namelen, pathlen=0; |
277 | DIR *dir; |
278 | Direntry_t *dp; |
279 | |
280 | (void)SvUPGRADE(sv, SVt_PV); |
281 | |
282 | if (PerlLIO_lstat(".", &statbuf) < 0) { |
283 | SV_CWD_RETURN_UNDEF; |
284 | } |
285 | |
286 | orig_cdev = statbuf.st_dev; |
287 | orig_cino = statbuf.st_ino; |
288 | cdev = orig_cdev; |
289 | cino = orig_cino; |
290 | |
291 | for (;;) { |
292 | odev = cdev; |
293 | oino = cino; |
294 | |
295 | if (PerlDir_chdir("..") < 0) { |
296 | SV_CWD_RETURN_UNDEF; |
297 | } |
298 | if (PerlLIO_stat(".", &statbuf) < 0) { |
299 | SV_CWD_RETURN_UNDEF; |
300 | } |
301 | |
302 | cdev = statbuf.st_dev; |
303 | cino = statbuf.st_ino; |
304 | |
305 | if (odev == cdev && oino == cino) { |
306 | break; |
307 | } |
308 | if (!(dir = PerlDir_open("."))) { |
309 | SV_CWD_RETURN_UNDEF; |
310 | } |
311 | |
312 | while ((dp = PerlDir_read(dir)) != NULL) { |
313 | #ifdef DIRNAMLEN |
314 | namelen = dp->d_namlen; |
315 | #else |
316 | namelen = strlen(dp->d_name); |
317 | #endif |
318 | /* skip . and .. */ |
319 | if (SV_CWD_ISDOT(dp)) { |
320 | continue; |
321 | } |
322 | |
323 | if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) { |
324 | SV_CWD_RETURN_UNDEF; |
325 | } |
326 | |
327 | tdev = statbuf.st_dev; |
328 | tino = statbuf.st_ino; |
329 | if (tino == oino && tdev == odev) { |
330 | break; |
331 | } |
332 | } |
333 | |
334 | if (!dp) { |
335 | SV_CWD_RETURN_UNDEF; |
336 | } |
337 | |
338 | if (pathlen + namelen + 1 >= MAXPATHLEN) { |
339 | SV_CWD_RETURN_UNDEF; |
340 | } |
341 | |
342 | SvGROW(sv, pathlen + namelen + 1); |
343 | |
344 | if (pathlen) { |
345 | /* shift down */ |
346 | Move(SvPVX(sv), SvPVX(sv) + namelen + 1, pathlen, char); |
347 | } |
348 | |
349 | /* prepend current directory to the front */ |
350 | *SvPVX(sv) = '/'; |
351 | Move(dp->d_name, SvPVX(sv)+1, namelen, char); |
352 | pathlen += (namelen + 1); |
353 | |
354 | #ifdef VOID_CLOSEDIR |
355 | PerlDir_close(dir); |
356 | #else |
357 | if (PerlDir_close(dir) < 0) { |
358 | SV_CWD_RETURN_UNDEF; |
359 | } |
360 | #endif |
361 | } |
362 | |
363 | if (pathlen) { |
364 | SvCUR_set(sv, pathlen); |
365 | *SvEND(sv) = '\0'; |
366 | SvPOK_only(sv); |
367 | |
368 | if (PerlDir_chdir(SvPVX(sv)) < 0) { |
369 | SV_CWD_RETURN_UNDEF; |
370 | } |
371 | } |
372 | if (PerlLIO_stat(".", &statbuf) < 0) { |
373 | SV_CWD_RETURN_UNDEF; |
374 | } |
375 | |
376 | cdev = statbuf.st_dev; |
377 | cino = statbuf.st_ino; |
378 | |
379 | if (cdev != orig_cdev || cino != orig_cino) { |
380 | Perl_croak(aTHX_ "Unstable directory path, " |
381 | "current directory changed unexpectedly"); |
382 | } |
383 | |
384 | return TRUE; |
f6342b4b |
385 | } |
a9939470 |
386 | #endif |
387 | |
388 | #else |
389 | return FALSE; |
390 | #endif |
391 | } |
392 | |
393 | #endif |
394 | |
395 | |
f22d8e4b |
396 | MODULE = Cwd PACKAGE = Cwd |
0d2079fa |
397 | |
f22d8e4b |
398 | PROTOTYPES: ENABLE |
0d2079fa |
399 | |
f22d8e4b |
400 | void |
401 | fastcwd() |
7ddb28a3 |
402 | PROTOTYPE: DISABLE |
f22d8e4b |
403 | PPCODE: |
404 | { |
405 | dXSTARG; |
89423764 |
406 | getcwd_sv(TARG); |
f22d8e4b |
407 | XSprePUSH; PUSHTARG; |
248785eb |
408 | #ifndef INCOMPLETE_TAINTS |
409 | SvTAINTED_on(TARG); |
410 | #endif |
0d2079fa |
411 | } |
412 | |
f22d8e4b |
413 | void |
23bb49fa |
414 | getcwd(...) |
fa52125f |
415 | PROTOTYPE: DISABLE |
416 | PPCODE: |
417 | { |
418 | dXSTARG; |
419 | getcwd_sv(TARG); |
420 | XSprePUSH; PUSHTARG; |
421 | #ifndef INCOMPLETE_TAINTS |
422 | SvTAINTED_on(TARG); |
423 | #endif |
424 | } |
425 | |
426 | void |
03d70c89 |
427 | abs_path(pathsv=Nullsv) |
428 | SV *pathsv |
99f36a73 |
429 | PROTOTYPE: DISABLE |
f22d8e4b |
430 | PPCODE: |
2ae52c40 |
431 | { |
f22d8e4b |
432 | dXSTARG; |
433 | char *path; |
00536bfc |
434 | char buf[MAXPATHLEN]; |
03d70c89 |
435 | |
07409e01 |
436 | path = pathsv ? SvPV_nolen(pathsv) : (char *)"."; |
03d70c89 |
437 | |
00536bfc |
438 | if (bsd_realpath(path, buf)) { |
439 | sv_setpvn(TARG, buf, strlen(buf)); |
440 | SvPOK_only(TARG); |
ea715489 |
441 | SvTAINTED_on(TARG); |
2ae52c40 |
442 | } |
03d70c89 |
443 | else |
ea715489 |
444 | sv_setsv(TARG, &PL_sv_undef); |
2ae52c40 |
445 | |
f22d8e4b |
446 | XSprePUSH; PUSHTARG; |
ea715489 |
447 | #ifndef INCOMPLETE_TAINTS |
448 | SvTAINTED_on(TARG); |
449 | #endif |
2ae52c40 |
450 | } |
09122b95 |
451 | |
42d1cefd |
452 | #if defined(WIN32) && !defined(UNDER_CE) |
09122b95 |
453 | |
454 | void |
455 | getdcwd(...) |
456 | PPCODE: |
457 | { |
458 | dXSTARG; |
459 | int drive; |
460 | char *dir; |
461 | |
462 | /* Drive 0 is the current drive, 1 is A:, 2 is B:, 3 is C: and so on. */ |
463 | if ( items == 0 || |
464 | (items == 1 && (!SvOK(ST(0)) || (SvPOK(ST(0)) && !SvCUR(ST(0)))))) |
465 | drive = 0; |
466 | else if (items == 1 && SvPOK(ST(0)) && SvCUR(ST(0)) && |
467 | isALPHA(SvPVX(ST(0))[0])) |
468 | drive = toUPPER(SvPVX(ST(0))[0]) - 'A' + 1; |
469 | else |
470 | croak("Usage: getdcwd(DRIVE)"); |
471 | |
275e8705 |
472 | New(0,dir,MAXPATHLEN,char); |
473 | if (_getdcwd(drive, dir, MAXPATHLEN)) { |
09122b95 |
474 | sv_setpvn(TARG, dir, strlen(dir)); |
09122b95 |
475 | SvPOK_only(TARG); |
476 | } |
477 | else |
478 | sv_setsv(TARG, &PL_sv_undef); |
479 | |
99f36a73 |
480 | Safefree(dir); |
481 | |
09122b95 |
482 | XSprePUSH; PUSHTARG; |
483 | #ifndef INCOMPLETE_TAINTS |
484 | SvTAINTED_on(TARG); |
485 | #endif |
486 | } |
487 | |
488 | #endif |