5 # define NEED_sv_2pv_nolen
13 /* The realpath() implementation from OpenBSD 2.9 (realpath.c 1.4)
14 * Renamed here to bsd_realpath() to avoid library conflicts.
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.
26 * The Regents of the University of California. All rights reserved.
28 * This code is derived from software contributed to Berkeley by
31 * Redistribution and use in source and binary forms, with or without
32 * modification, are permitted provided that the following conditions
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.
39 * 3. Neither the name of the University nor the names of its contributors
40 * may be used to endorse or promote products derived from this software
41 * without specific prior written permission.
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
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 */
60 /* OpenBSD system #includes removed since the Perl ones should do. --jhi */
67 * char *realpath(const char *path, char resolved_path[MAXPATHLEN]);
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).
75 bsd_realpath(const char *path, char *resolved)
79 return Perl_rmsexpand(aTHX_ (char*)path, resolved, NULL, 0);
83 char *q, wbuf[MAXPATHLEN];
86 /* Save the starting point. */
90 if ((fd = open(".", O_RDONLY)) < 0) {
91 (void)strcpy(resolved, ".");
97 if (getcwd(wd, MAXPATHLEN - 1) == NULL) {
98 (void)strcpy(resolved, ".");
104 * Find the dirname and basename from the path to be resolved.
105 * Change directory to the dirname component.
106 * lstat the basename part.
107 * if it is a symlink, read in the value and loop.
108 * if it is a directory, then change to that directory.
109 * get the current directory name and append the basename.
111 (void)strncpy(resolved, path, MAXPATHLEN - 1);
112 resolved[MAXPATHLEN - 1] = '\0';
114 q = strrchr(resolved, '/');
123 } while (q > resolved && *q == '/');
132 #if defined(HAS_LSTAT) && defined(HAS_READLINK) && defined(HAS_SYMLINK)
135 /* Deal with the last component. */
136 if (lstat(p, &sb) == 0) {
137 if (S_ISLNK(sb.st_mode)) {
139 if (++symlinks > MAXSYMLINKS) {
143 n = readlink(p, resolved, MAXPATHLEN-1);
149 if (S_ISDIR(sb.st_mode)) {
159 * Save the last component name and get the full pathname of
160 * the current directory.
162 (void)strcpy(wbuf, p);
163 if (getcwd(resolved, MAXPATHLEN) == 0)
167 * Join the two strings together, ensuring that the right thing
168 * happens if the last component is empty, or the dirname is root.
170 if (resolved[0] == '/' && resolved[1] == '\0')
176 if (strlen(resolved) + strlen(wbuf) + (1 - rootd) + 1 > MAXPATHLEN) {
177 errno = ENAMETOOLONG;
181 (void)strcat(resolved, "/");
182 (void)strcat(resolved, wbuf);
185 /* Go back to where we came from. */
187 if (fchdir(fd) < 0) {
198 /* It's okay if the close fails, what's an fd more or less? */
204 err1: serrno = errno;
220 #ifndef SV_CWD_RETURN_UNDEF
221 #define SV_CWD_RETURN_UNDEF \
222 sv_setsv(sv, &PL_sv_undef); \
226 #ifndef OPpENTERSUB_HASTARG
227 #define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */
231 #define dXSTARG SV * targ = ((PL_op->op_private & OPpENTERSUB_HASTARG) \
232 ? PAD_SV(PL_op->op_targ) : sv_newmortal())
236 #define XSprePUSH (sp = PL_stack_base + ax - 1)
240 #define SV_CWD_ISDOT(dp) \
241 (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
242 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
246 /* Taken from perl 5.8's util.c */
247 #define getcwd_sv(a) Perl_getcwd_sv(aTHX_ a)
248 int Perl_getcwd_sv(pTHX_ register SV *sv)
252 #ifndef INCOMPLETE_TAINTS
258 char buf[MAXPATHLEN];
260 /* Some getcwd()s automatically allocate a buffer of the given
261 * size from the heap if they are given a NULL buffer pointer.
262 * The problem is that this behaviour is not portable. */
263 if (getcwd(buf, sizeof(buf) - 1)) {
264 STRLEN len = strlen(buf);
265 sv_setpvn(sv, buf, len);
269 sv_setsv(sv, &PL_sv_undef);
277 int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino;
278 int namelen, pathlen=0;
282 (void)SvUPGRADE(sv, SVt_PV);
284 if (PerlLIO_lstat(".", &statbuf) < 0) {
288 orig_cdev = statbuf.st_dev;
289 orig_cino = statbuf.st_ino;
297 if (PerlDir_chdir("..") < 0) {
300 if (PerlLIO_stat(".", &statbuf) < 0) {
304 cdev = statbuf.st_dev;
305 cino = statbuf.st_ino;
307 if (odev == cdev && oino == cino) {
310 if (!(dir = PerlDir_open("."))) {
314 while ((dp = PerlDir_read(dir)) != NULL) {
316 namelen = dp->d_namlen;
318 namelen = strlen(dp->d_name);
321 if (SV_CWD_ISDOT(dp)) {
325 if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) {
329 tdev = statbuf.st_dev;
330 tino = statbuf.st_ino;
331 if (tino == oino && tdev == odev) {
340 if (pathlen + namelen + 1 >= MAXPATHLEN) {
344 SvGROW(sv, pathlen + namelen + 1);
348 Move(SvPVX(sv), SvPVX(sv) + namelen + 1, pathlen, char);
351 /* prepend current directory to the front */
353 Move(dp->d_name, SvPVX(sv)+1, namelen, char);
354 pathlen += (namelen + 1);
359 if (PerlDir_close(dir) < 0) {
366 SvCUR_set(sv, pathlen);
370 if (PerlDir_chdir(SvPVX(sv)) < 0) {
374 if (PerlLIO_stat(".", &statbuf) < 0) {
378 cdev = statbuf.st_dev;
379 cino = statbuf.st_ino;
381 if (cdev != orig_cdev || cino != orig_cino) {
382 Perl_croak(aTHX_ "Unstable directory path, "
383 "current directory changed unexpectedly");
398 MODULE = Cwd PACKAGE = Cwd
410 #ifndef INCOMPLETE_TAINTS
423 #ifndef INCOMPLETE_TAINTS
429 abs_path(pathsv=Nullsv)
436 char buf[MAXPATHLEN];
438 path = pathsv ? SvPV_nolen(pathsv) : (char *)".";
440 if (bsd_realpath(path, buf)) {
441 sv_setpvn(TARG, buf, strlen(buf));
446 sv_setsv(TARG, &PL_sv_undef);
449 #ifndef INCOMPLETE_TAINTS
454 #if defined(WIN32) && !defined(UNDER_CE)
464 /* Drive 0 is the current drive, 1 is A:, 2 is B:, 3 is C: and so on. */
466 (items == 1 && (!SvOK(ST(0)) || (SvPOK(ST(0)) && !SvCUR(ST(0))))))
468 else if (items == 1 && SvPOK(ST(0)) && SvCUR(ST(0)) &&
469 isALPHA(SvPVX(ST(0))[0]))
470 drive = toUPPER(SvPVX(ST(0))[0]) - 'A' + 1;
472 croak("Usage: getdcwd(DRIVE)");
474 New(0,dir,MAXPATHLEN,char);
475 if (_getdcwd(drive, dir, MAXPATHLEN)) {
476 sv_setpvn(TARG, dir, strlen(dir));
480 sv_setsv(TARG, &PL_sv_undef);
485 #ifndef INCOMPLETE_TAINTS