#include "perl.h"
#include "XSUB.h"
+#ifdef I_UNISTD
+# include <unistd.h>
+#endif
+
+/* 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;
+{
+#ifdef VMS
+ dTHX;
+ return Perl_rmsexpand(aTHX_ (char*)path, resolved, NULL, 0);
+#else
+ struct stat sb;
+ int n, rootd, serrno;
+ char *p, *q, wbuf[MAXPATHLEN];
+ int symlinks = 0;
+
+ /* Save the starting point. */
+#ifdef HAS_FCHDIR
+ int fd;
+
+ if ((fd = open(".", O_RDONLY)) < 0) {
+ (void)strcpy(resolved, ".");
+ return (NULL);
+ }
+#else
+ char wd[MAXPATHLEN];
+
+ if (getcwd(wd, MAXPATHLEN - 1) == NULL) {
+ (void)strcpy(resolved, ".");
+ return (NULL);
+ }
+#endif
+
+ /*
+ * 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;
+
+#if defined(HAS_LSTAT) && defined(HAS_READLINK) && defined(HAS_SYMLINK)
+ /* 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 = "";
+ }
+ }
+#endif
+
+ /*
+ * 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. */
+#ifdef HAS_FCHDIR
+ if (fchdir(fd) < 0) {
+ serrno = errno;
+ goto err2;
+ }
+#else
+ if (chdir(wd) < 0) {
+ serrno = errno;
+ goto err2;
+ }
+#endif
+
+ /* It's okay if the close fails, what's an fd more or less? */
+#ifdef HAS_FCHDIR
+ (void)close(fd);
+#endif
+ return (resolved);
+
+err1: serrno = errno;
+#ifdef HAS_FCHDIR
+ (void)fchdir(fd);
+#else
+ (void)chdir(wd);
+#endif
+
+err2:
+#ifdef HAS_FCHDIR
+ (void)close(fd);
+#endif
+ errno = serrno;
+ return (NULL);
+#endif
+}
+
MODULE = Cwd PACKAGE = Cwd
PROTOTYPES: ENABLE
PPCODE:
{
dXSTARG;
- sv_getcwd(TARG);
+ getcwd_sv(TARG);
XSprePUSH; PUSHTARG;
}
void
-abs_path(svpath=Nullsv)
- SV *svpath
+abs_path(pathsv=Nullsv)
+ SV *pathsv
PPCODE:
{
dXSTARG;
char *path;
- STRLEN len;
+ char buf[MAXPATHLEN];
- if (svpath) {
- path = SvPV(svpath, len);
- }
- else {
- path = ".";
- len = 1;
+ path = pathsv ? SvPV_nolen(pathsv) : ".";
+
+ if (bsd_realpath(path, buf)) {
+ sv_setpvn(TARG, buf, strlen(buf));
+ SvPOK_only(TARG);
+ SvTAINTED_on(TARG);
}
+ else
+ sv_setsv(TARG, &PL_sv_undef);
- sv_realpath(TARG, path, len);
XSprePUSH; PUSHTARG;
+#ifndef INCOMPLETE_TAINTS
+ SvTAINTED_on(TARG);
+#endif
}
projects / p5sagit/p5-mst-13.2.git / blobdiff