(src/lib/libc/stdlib/realpath.c 1.4).
p4raw-id: //depot/perl@10750
#define sv_pos_b2u Perl_sv_pos_b2u
#define sv_pvutf8n_force Perl_sv_pvutf8n_force
#define sv_pvbyten_force Perl_sv_pvbyten_force
-#define sv_realpath Perl_sv_realpath
#define sv_reftype Perl_sv_reftype
#define sv_replace Perl_sv_replace
#define sv_report_used Perl_sv_report_used
#define sv_pos_b2u(a,b) Perl_sv_pos_b2u(aTHX_ a,b)
#define sv_pvutf8n_force(a,b) Perl_sv_pvutf8n_force(aTHX_ a,b)
#define sv_pvbyten_force(a,b) Perl_sv_pvbyten_force(aTHX_ a,b)
-#define sv_realpath(a,b,c) Perl_sv_realpath(aTHX_ a,b,c)
#define sv_reftype(a,b) Perl_sv_reftype(aTHX_ a,b)
#define sv_replace(a,b) Perl_sv_replace(aTHX_ a,b)
#define sv_report_used() Perl_sv_report_used(aTHX)
#define sv_pvutf8n_force Perl_sv_pvutf8n_force
#define Perl_sv_pvbyten_force CPerlObj::Perl_sv_pvbyten_force
#define sv_pvbyten_force Perl_sv_pvbyten_force
-#define Perl_sv_realpath CPerlObj::Perl_sv_realpath
-#define sv_realpath Perl_sv_realpath
#define Perl_sv_reftype CPerlObj::Perl_sv_reftype
#define sv_reftype Perl_sv_reftype
#define Perl_sv_replace CPerlObj::Perl_sv_replace
Aopd |char* |sv_pvn_force |SV* sv|STRLEN* lp
Apd |char* |sv_pvutf8n_force|SV* sv|STRLEN* lp
Apd |char* |sv_pvbyten_force|SV* sv|STRLEN* lp
-Apd |int |sv_realpath |SV* sv|char *path|STRLEN maxlen
Apd |char* |sv_reftype |SV* sv|int ob
Apd |void |sv_replace |SV* sv|SV* nsv
Apd |void |sv_report_used
#include "perl.h"
#include "XSUB.h"
+/* The realpath() implementation from OpenBSD 2.9 (realpath.c 1.4)
+ * Renamed here to bsd_realpath() to avoid library conflicts.
+ * --jhi 2000-06-20 */
+
+/*
+ * Copyright (c) 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char *rcsid = "$OpenBSD: realpath.c,v 1.4 1998/05/18 09:55:19 deraadt Exp $";
+#endif /* LIBC_SCCS and not lint */
+
+/* OpenBSD system #includes removed since the Perl ones should do. --jhi */
+
+#ifndef MAXSYMLINKS
+#define MAXSYMLINKS 8
+#endif
+
+/*
+ * char *realpath(const char *path, char resolved_path[MAXPATHLEN]);
+ *
+ * Find the real name of path, by removing all ".", ".." and symlink
+ * components. Returns (resolved) on success, or (NULL) on failure,
+ * in which case the path which caused trouble is left in (resolved).
+ */
+static
+char *
+bsd_realpath(path, resolved)
+ const char *path;
+ char *resolved;
+{
+ struct stat sb;
+ int fd, n, rootd, serrno;
+ char *p, *q, wbuf[MAXPATHLEN];
+ int symlinks = 0;
+
+ /* Save the starting point. */
+ if ((fd = open(".", O_RDONLY)) < 0) {
+ (void)strcpy(resolved, ".");
+ return (NULL);
+ }
+
+ /*
+ * Find the dirname and basename from the path to be resolved.
+ * Change directory to the dirname component.
+ * lstat the basename part.
+ * if it is a symlink, read in the value and loop.
+ * if it is a directory, then change to that directory.
+ * get the current directory name and append the basename.
+ */
+ (void)strncpy(resolved, path, MAXPATHLEN - 1);
+ resolved[MAXPATHLEN - 1] = '\0';
+loop:
+ q = strrchr(resolved, '/');
+ if (q != NULL) {
+ p = q + 1;
+ if (q == resolved)
+ q = "/";
+ else {
+ do {
+ --q;
+ } while (q > resolved && *q == '/');
+ q[1] = '\0';
+ q = resolved;
+ }
+ if (chdir(q) < 0)
+ goto err1;
+ } else
+ p = resolved;
+
+ /* Deal with the last component. */
+ if (lstat(p, &sb) == 0) {
+ if (S_ISLNK(sb.st_mode)) {
+ if (++symlinks > MAXSYMLINKS) {
+ errno = ELOOP;
+ goto err1;
+ }
+ n = readlink(p, resolved, MAXPATHLEN-1);
+ if (n < 0)
+ goto err1;
+ resolved[n] = '\0';
+ goto loop;
+ }
+ if (S_ISDIR(sb.st_mode)) {
+ if (chdir(p) < 0)
+ goto err1;
+ p = "";
+ }
+ }
+
+ /*
+ * Save the last component name and get the full pathname of
+ * the current directory.
+ */
+ (void)strcpy(wbuf, p);
+ if (getcwd(resolved, MAXPATHLEN) == 0)
+ goto err1;
+
+ /*
+ * Join the two strings together, ensuring that the right thing
+ * happens if the last component is empty, or the dirname is root.
+ */
+ if (resolved[0] == '/' && resolved[1] == '\0')
+ rootd = 1;
+ else
+ rootd = 0;
+
+ if (*wbuf) {
+ if (strlen(resolved) + strlen(wbuf) + rootd + 1 > MAXPATHLEN) {
+ errno = ENAMETOOLONG;
+ goto err1;
+ }
+ if (rootd == 0)
+ (void)strcat(resolved, "/");
+ (void)strcat(resolved, wbuf);
+ }
+
+ /* Go back to where we came from. */
+ if (fchdir(fd) < 0) {
+ serrno = errno;
+ goto err2;
+ }
+
+ /* It's okay if the close fails, what's an fd more or less? */
+ (void)close(fd);
+ return (resolved);
+
+err1: serrno = errno;
+ (void)fchdir(fd);
+err2: (void)close(fd);
+ errno = serrno;
+ return (NULL);
+}
+
MODULE = Cwd PACKAGE = Cwd
PROTOTYPES: ENABLE
}
void
-abs_path(svpath=Nullsv)
- SV *svpath
+abs_path(pathsv=Nullsv)
+ SV *pathsv
PPCODE:
{
dXSTARG;
char *path;
STRLEN len;
+ char *buf;
- if (svpath) {
- path = SvPV(svpath, len);
- }
- else {
- path = ".";
- len = 1;
+ New(0, buf, MAXPATHLEN, char);
+ if (buf) {
+ buf[MAXPATHLEN] = 0;
+ if (pathsv)
+ path = SvPV(pathsv, len);
+ else {
+ path = ".";
+ len = 1;
+ }
+
+ if (bsd_realpath(path, buf)) {
+ sv_setpvn(TARG, buf, strlen(buf));
+ SvPOK_only(TARG);
+ }
+ else
+ sv_setsv(TARG, &PL_sv_undef);
+
+ Safefree(buf);
}
+ else
+ sv_setsv(TARG, &PL_sv_undef);
- sv_realpath(TARG, path, len);
XSprePUSH; PUSHTARG;
}
#define Perl_sv_pvbyten_force pPerl->Perl_sv_pvbyten_force
#undef sv_pvbyten_force
#define sv_pvbyten_force Perl_sv_pvbyten_force
-#undef Perl_sv_realpath
-#define Perl_sv_realpath pPerl->Perl_sv_realpath
-#undef sv_realpath
-#define sv_realpath Perl_sv_realpath
#undef Perl_sv_reftype
#define Perl_sv_reftype pPerl->Perl_sv_reftype
#undef sv_reftype
return ((CPerlObj*)pPerl)->Perl_sv_pvbyten_force(sv, lp);
}
-#undef Perl_sv_realpath
-int
-Perl_sv_realpath(pTHXo_ SV* sv, char *path, STRLEN maxlen)
-{
- return ((CPerlObj*)pPerl)->Perl_sv_realpath(sv, path, maxlen);
-}
-
#undef Perl_sv_reftype
char*
Perl_sv_reftype(pTHXo_ SV* sv, int ob)
(F) Your Perl was compiled with B<-D>SETUID_SCRIPTS_ARE_SECURE_NOW, but
a version of the setuid emulator somehow got run anyway.
-=item sv_realpath: %s
-
-(S) You probably used some form of getcwd. The implementation of
-that functionality detected something odd in your filesystem
-environment and gave up (returning undef).
-
=item Switch (?(condition)... contains too many branches in regex;
marked by <-- HERE in m/%s/
PERL_CALLCONV char* Perl_sv_pvn_force(pTHX_ SV* sv, STRLEN* lp);
PERL_CALLCONV char* Perl_sv_pvutf8n_force(pTHX_ SV* sv, STRLEN* lp);
PERL_CALLCONV char* Perl_sv_pvbyten_force(pTHX_ SV* sv, STRLEN* lp);
-PERL_CALLCONV int Perl_sv_realpath(pTHX_ SV* sv, char *path, STRLEN maxlen);
PERL_CALLCONV char* Perl_sv_reftype(pTHX_ SV* sv, int ob);
PERL_CALLCONV void Perl_sv_replace(pTHX_ SV* sv, SV* nsv);
PERL_CALLCONV void Perl_sv_report_used(pTHX);
#endif
}
-/*
-=for apidoc sv_realpath
-
-Emulate realpath(3).
-
-The real realpath() is not used because it's a known can of worms.
-We may have bugs but hey, they are our very own.
-
-=cut
- */
-int
-Perl_sv_realpath(pTHX_ SV *sv, char *path, STRLEN maxlen)
-{
-#ifndef PERL_MICRO
- char name[MAXPATHLEN] = { 0 };
- char dotdots[MAXPATHLEN] = { 0 };
- char *s;
- STRLEN pathlen, namelen;
- DIR *parent;
- Direntry_t *dp;
- struct stat cst, pst, tst;
-
- if (!sv || !path || !maxlen) {
- Perl_warn(aTHX_ "sv_realpath: realpath(0x%x, 0x%x, "")",
- sv, path, maxlen);
- SV_CWD_RETURN_UNDEF;
- }
-
- /* Is the source buffer too long?
- * Don't use strlen() to avoid running off the end. */
- if (maxlen >= MAXPATHLEN)
- pathlen = maxlen;
- else {
- s = memchr(path, '\0', MAXPATHLEN);
- pathlen = s ? s - path : MAXPATHLEN;
- }
- if (pathlen >= MAXPATHLEN) {
- Perl_warn(aTHX_ "sv_realpath: source too large");
- SV_CWD_RETURN_UNDEF;
- }
-
- if (PerlLIO_stat(path, &cst) < 0) {
- Perl_warn(aTHX_ "sv_realpath: stat(\"%s\"): %s",
- path, Strerror(errno));
- SV_CWD_RETURN_UNDEF;
- }
-
- (void)SvUPGRADE(sv, SVt_PV);
-
- Copy(path, dotdots, maxlen, char);
-
- pathlen = 0;
-
- for (;;) {
- strcat(dotdots, "/..");
- StructCopy(&cst, &pst, struct stat);
-
- if (PerlLIO_stat(dotdots, &cst) < 0) {
- Perl_warn(aTHX_ "sv_realpath: stat(\"%s\"): %s",
- dotdots, Strerror(errno));
- SV_CWD_RETURN_UNDEF;
- }
-
- if (pst.st_dev == cst.st_dev && pst.st_ino == cst.st_ino) {
- /* We've reached the root: previous is same as current */
- break;
- } else {
- STRLEN dotdotslen = strlen(dotdots);
-
- /* Scan through the dir looking for name of previous */
- if (!(parent = PerlDir_open(dotdots))) {
- Perl_warn(aTHX_ "sv_realpath: opendir(\"%s\"): %s",
- dotdots, Strerror(errno));
- SV_CWD_RETURN_UNDEF;
- }
-
- SETERRNO(0,SS$_NORMAL); /* for readdir() */
- while ((dp = PerlDir_read(parent)) != NULL) {
- if (SV_CWD_ISDOT(dp)) {
- continue;
- }
-
- Copy(dotdots, name, dotdotslen, char);
- name[dotdotslen] = '/';
-#ifdef DIRNAMLEN
- namelen = dp->d_namlen;
-#else
- namelen = strlen(dp->d_name);
-#endif
- Copy(dp->d_name, name + dotdotslen + 1, namelen, char);
- name[dotdotslen + 1 + namelen] = 0;
-
- if (PerlLIO_lstat(name, &tst) < 0) {
- PerlDir_close(parent);
- Perl_warn(aTHX_ "sv_realpath: lstat(\"%s\"): %s",
- name, Strerror(errno));
- SV_CWD_RETURN_UNDEF;
- }
-
- if (tst.st_dev == pst.st_dev && tst.st_ino == pst.st_ino)
- break;
-
- SETERRNO(0,SS$_NORMAL); /* for readdir() */
- }
-
- if (!dp && errno) {
- Perl_warn(aTHX_ "sv_realpath: readdir(\"%s\"): %s",
- dotdots, Strerror(errno));
- SV_CWD_RETURN_UNDEF;
- }
-
- if (pathlen + namelen + 1 >= MAXPATHLEN) {
- Perl_warn(aTHX_ "sv_realpath: too long name");
- SV_CWD_RETURN_UNDEF;
- }
-
- SvGROW(sv, pathlen + namelen + 1);
- if (pathlen) {
- /* shift down */
- Move(SvPVX(sv), SvPVX(sv) + namelen + 1, pathlen, char);
- }
-
- *SvPVX(sv) = '/';
- Move(dp->d_name, SvPVX(sv)+1, namelen, char);
- pathlen += (namelen + 1);
-
-#ifdef VOID_CLOSEDIR
- PerlDir_close(parent);
-#else
- if (PerlDir_close(parent) < 0) {
- Perl_warn(aTHX_ "sv_realpath: closedir(\"%s\"): %s",
- dotdots, Strerror(errno));
- SV_CWD_RETURN_UNDEF;
- }
-#endif
- }
- }
-
- SvCUR_set(sv, pathlen);
- SvPOK_only(sv);
-
- return TRUE;
-#else
- return FALSE; /* MICROPERL */
-#endif
-}
-
projects / p5sagit/p5-mst-13.2.git / commitdiff