1 #define PERL_NO_GET_CONTEXT
6 #define NEED_my_strlcpy
7 #define NEED_my_strlcat
14 /* The realpath() implementation from OpenBSD 3.9 to 4.2 (realpath.c 1.13)
15 * 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.
25 * Copyright (c) 2003 Constantin S. Svintsoff <kostik@iclub.nsu.ru>
27 * Redistribution and use in source and binary forms, with or without
28 * modification, are permitted provided that the following conditions
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.
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
39 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
40 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
42 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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
52 /* OpenBSD system #includes removed since the Perl ones should do. --jhi */
60 * char *realpath(const char *path, char resolved[MAXPATHLEN]);
62 * Find the real name of path, by removing all ".", ".." and symlink
63 * components. Returns (resolved) on success, or (NULL) on failure,
64 * in which case the path which caused trouble is left in (resolved).
68 bsd_realpath(const char *path, char resolved[MAXPATHLEN])
71 size_t left_len, resolved_len;
74 char left[MAXPATHLEN], next_token[MAXPATHLEN];
84 left_len = my_strlcpy(left, path + 1, sizeof(left));
86 if (getcwd(resolved, MAXPATHLEN) == NULL) {
87 my_strlcpy(resolved, ".", MAXPATHLEN);
90 resolved_len = strlen(resolved);
91 left_len = my_strlcpy(left, path, sizeof(left));
93 if (left_len >= sizeof(left) || resolved_len >= MAXPATHLEN) {
99 * Iterate over path components in 'left'.
101 while (left_len != 0) {
103 * Extract the next path component and adjust 'left'
106 p = strchr(left, '/');
107 s = p ? p : left + left_len;
108 if ((STRLEN)(s - left) >= (STRLEN)sizeof(next_token)) {
109 errno = ENAMETOOLONG;
112 memcpy(next_token, left, s - left);
113 next_token[s - left] = '\0';
114 left_len -= s - left;
116 memmove(left, s + 1, left_len + 1);
117 if (resolved[resolved_len - 1] != '/') {
118 if (resolved_len + 1 >= MAXPATHLEN) {
119 errno = ENAMETOOLONG;
122 resolved[resolved_len++] = '/';
123 resolved[resolved_len] = '\0';
125 if (next_token[0] == '\0')
127 else if (strcmp(next_token, ".") == 0)
129 else if (strcmp(next_token, "..") == 0) {
131 * Strip the last path component except when we have
134 if (resolved_len > 1) {
135 resolved[resolved_len - 1] = '\0';
136 q = strrchr(resolved, '/') + 1;
138 resolved_len = q - resolved;
144 * Append the next path component and lstat() it. If
145 * lstat() fails we still can return successfully if
146 * there are no more path components left.
148 resolved_len = my_strlcat(resolved, next_token, MAXPATHLEN);
149 if (resolved_len >= MAXPATHLEN) {
150 errno = ENAMETOOLONG;
153 #if defined(HAS_LSTAT) && defined(HAS_READLINK) && defined(HAS_SYMLINK)
156 if (lstat(resolved, &sb) != 0) {
157 if (errno == ENOENT && p == NULL) {
163 if (S_ISLNK(sb.st_mode)) {
165 char symlink[MAXPATHLEN];
167 if (symlinks++ > MAXSYMLINKS) {
171 slen = readlink(resolved, symlink, sizeof(symlink) - 1);
174 symlink[slen] = '\0';
175 if (symlink[0] == '/') {
178 } else if (resolved_len > 1) {
179 /* Strip the last path component. */
180 resolved[resolved_len - 1] = '\0';
181 q = strrchr(resolved, '/') + 1;
183 resolved_len = q - resolved;
187 * If there are any path components left, then
188 * append them to symlink. The result is placed
192 if (symlink[slen - 1] != '/') {
193 if ((STRLEN)(slen + 1) >= (STRLEN)sizeof(symlink)) {
194 errno = ENAMETOOLONG;
198 symlink[slen + 1] = 0;
200 left_len = my_strlcat(symlink, left, sizeof(left));
201 if (left_len >= sizeof(left)) {
202 errno = ENAMETOOLONG;
206 left_len = my_strlcpy(left, symlink, sizeof(left));
213 * Remove trailing slash except when the resolved pathname
216 if (resolved_len > 1 && resolved[resolved_len - 1] == '/')
217 resolved[resolved_len - 1] = '\0';
222 #ifndef SV_CWD_RETURN_UNDEF
223 #define SV_CWD_RETURN_UNDEF \
224 sv_setsv(sv, &PL_sv_undef); \
228 #ifndef OPpENTERSUB_HASTARG
229 #define OPpENTERSUB_HASTARG 32 /* Called from OP tree. */
233 #define dXSTARG SV * targ = ((PL_op->op_private & OPpENTERSUB_HASTARG) \
234 ? PAD_SV(PL_op->op_targ) : sv_newmortal())
238 #define XSprePUSH (sp = PL_stack_base + ax - 1)
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')))
248 /* Taken from perl 5.8's util.c */
249 #define getcwd_sv(a) Perl_getcwd_sv(aTHX_ a)
250 int Perl_getcwd_sv(pTHX_ SV *sv)
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");
397 #if defined(START_MY_CXT) && defined(MY_CXT_CLONE)
398 # define USE_MY_CXT 1
400 # define USE_MY_CXT 0
404 # define MY_CXT_KEY "Cwd::_guts"XS_VERSION
406 SV *empty_string_sv, *slash_string_sv;
409 # define dUSE_MY_CXT dMY_CXT
410 # define EMPTY_STRING_SV MY_CXT.empty_string_sv
411 # define SLASH_STRING_SV MY_CXT.slash_string_sv
412 # define POPULATE_MY_CXT do { \
413 MY_CXT.empty_string_sv = newSVpvs(""); \
414 MY_CXT.slash_string_sv = newSVpvs("/"); \
417 # define dUSE_MY_CXT dNOOP
418 # define EMPTY_STRING_SV sv_2mortal(newSVpvs(""))
419 # define SLASH_STRING_SV sv_2mortal(newSVpvs("/"))
422 #define invocant_is_unix(i) THX_invocant_is_unix(aTHX_ i)
425 THX_invocant_is_unix(pTHX_ SV *invocant)
428 * This is used to enable optimisations that avoid method calls
429 * by knowing how they would resolve. False negatives, disabling
430 * the optimisation where it would actually behave correctly, are
433 return SvPOK(invocant) && SvCUR(invocant) == 16 &&
434 !memcmp(SvPVX(invocant), "File::Spec::Unix", 16);
437 #define unix_canonpath(p) THX_unix_canonpath(aTHX_ p)
440 THX_unix_canonpath(pTHX_ SV *path)
443 char const *p, *pe, *q;
448 if(!SvOK(path)) return &PL_sv_undef;
449 p = SvPV_nomg(path, plen);
450 if(plen == 0) return newSVpvs("");
452 retval = newSV(plen);
454 if(SvUTF8(path)) SvUTF8_on(retval);
457 if(DOUBLE_SLASHES_SPECIAL && p[0] == '/' && p[1] == '/' && p[2] != '/') {
458 q = (const char *) memchr(p+2, '/', pe-(p+2));
466 * The transformations performed here are:
467 * . squeeze multiple slashes
468 * . eliminate "." segments, except one if that's all there is
469 * . eliminate leading ".." segments
470 * . eliminate trailing slash, unless it's all there is
475 do { p++; } while(p[0] == '/');
476 if(p[0] == '.' && p[1] == '.' && (p+2 == pe || p[2] == '/')) {
478 /* advance past second "." next time round loop */
479 } else if(p[0] == '.' && (p+1 == pe || p[1] == '/')) {
480 /* advance past "." next time round loop */
485 } else if(p[0] == '.' && p[1] == '/') {
488 do { p++; } while(p[0] == '/');
489 } while(p[0] == '.' && p[1] == '/');
490 if(p == pe) *o++ = '.';
492 if(p == pe) goto end;
494 q = (const char *) memchr(p, '/', pe-p);
500 if(p == pe) goto end;
502 do { p++; } while(p[0] == '/');
503 if(p == pe) goto end;
504 if(p[0] != '.') break;
505 if(p+1 == pe) goto end;
506 if(p[1] != '/') break;
514 SvCUR_set(retval, o - SvPVX(retval));
518 MODULE = Cwd PACKAGE = Cwd
535 PERL_UNUSED_VAR(items);
536 { MY_CXT_CLONE; POPULATE_MY_CXT; }
547 /* fastcwd takes zero parameters: */
548 if (ix == 1 && items != 0)
549 croak_xs_usage(cv, "");
556 abs_path(pathsv=Nullsv)
561 char *const path = pathsv ? SvPV_nolen(pathsv) : (char *)".";
562 char buf[MAXPATHLEN];
566 Perl_rmsexpand(aTHX_ path, buf, NULL, 0)
568 bsd_realpath(path, buf)
571 sv_setpv_mg(TARG, buf);
576 sv_setsv(TARG, &PL_sv_undef);
578 XSprePUSH; PUSHs(TARG);
582 #if defined(WIN32) && !defined(UNDER_CE)
593 /* Drive 0 is the current drive, 1 is A:, 2 is B:, 3 is C: and so on. */
595 (items == 1 && (!SvOK(ST(0)) || (SvPOK(ST(0)) && !SvCUR(ST(0))))))
597 else if (items == 1 && SvPOK(ST(0)) && SvCUR(ST(0)) &&
598 isALPHA(SvPVX(ST(0))[0]))
599 drive = toUPPER(SvPVX(ST(0))[0]) - 'A' + 1;
601 croak("Usage: getdcwd(DRIVE)");
603 New(0,dir,MAXPATHLEN,char);
604 if (_getdcwd(drive, dir, MAXPATHLEN)) {
605 sv_setpv_mg(TARG, dir);
609 sv_setsv(TARG, &PL_sv_undef);
613 XSprePUSH; PUSHs(TARG);
619 MODULE = Cwd PACKAGE = File::Spec::Unix
622 canonpath(SV *self, SV *path = &PL_sv_undef, ...)
624 PERL_UNUSED_VAR(self);
625 RETVAL = unix_canonpath(path);
630 _fn_canonpath(SV *path = &PL_sv_undef, ...)
632 RETVAL = unix_canonpath(path);
637 catdir(SV *self, ...)
643 ST(items) = EMPTY_STRING_SV;
644 joined = sv_newmortal();
645 do_join(joined, SLASH_STRING_SV, &ST(0), &ST(items));
646 if(invocant_is_unix(self)) {
647 RETVAL = unix_canonpath(joined);
655 call_method("canonpath", G_SCALAR);
659 SvREFCNT_inc(RETVAL);
671 ST(items) = EMPTY_STRING_SV;
672 joined = sv_newmortal();
673 do_join(joined, SLASH_STRING_SV, &ST(-1), &ST(items));
674 RETVAL = unix_canonpath(joined);
679 catfile(SV *self, ...)
683 if(invocant_is_unix(self)) {
685 RETVAL = &PL_sv_undef;
687 SV *file = unix_canonpath(ST(items-1));
691 SV *dir = sv_newmortal();
693 ST(items-1) = EMPTY_STRING_SV;
694 do_join(dir, SLASH_STRING_SV, &ST(0), &ST(items-1));
695 RETVAL = unix_canonpath(dir);
696 if(SvCUR(RETVAL) == 0 || SvPVX(RETVAL)[SvCUR(RETVAL)-1] != '/')
697 sv_catsv(RETVAL, SLASH_STRING_SV);
698 sv_catsv(RETVAL, file);
707 PUSHs(items == 1 ? &PL_sv_undef : ST(items-1));
709 call_method("canonpath", G_SCALAR);
714 RETVAL = SvREFCNT_inc(file);
723 call_method("catdir", G_SCALAR);
728 need_slash = len == 0 || pv[len-1] != '/';
729 RETVAL = newSVsv(dir);
730 if(need_slash) sv_catsv(RETVAL, SLASH_STRING_SV);
731 sv_catsv(RETVAL, file);
743 RETVAL = &PL_sv_undef;
745 SV *file = unix_canonpath(ST(items-1));
749 SV *dir = sv_newmortal();
751 ST(items-1) = EMPTY_STRING_SV;
752 do_join(dir, SLASH_STRING_SV, &ST(-1), &ST(items-1));
753 RETVAL = unix_canonpath(dir);
754 if(SvCUR(RETVAL) == 0 || SvPVX(RETVAL)[SvCUR(RETVAL)-1] != '/')
755 sv_catsv(RETVAL, SLASH_STRING_SV);
756 sv_catsv(RETVAL, file);