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