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authorUlrich Drepper <drepper@redhat.com>2006-02-05 21:19:53 +0000
committerUlrich Drepper <drepper@redhat.com>2006-02-05 21:19:53 +0000
commitbecac6c5b1104415cd76ea02ec01a4c55fb15e55 (patch)
tree7508f37731bd781111b8e5fcf9dfc42a7b05e176 /io
parentdf6871cb7e345e88b9e571962020354a2363d796 (diff)
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* io/ftw.c (ftw_startup): Use fchdir to return to original
directory for FTW_CHDIR.
Diffstat (limited to 'io')
-rw-r--r--io/ftw.c51
1 files changed, 30 insertions, 21 deletions
diff --git a/io/ftw.c b/io/ftw.c
index 7610851047..5cd0faf54d 100644
--- a/io/ftw.c
+++ b/io/ftw.c
@@ -1,5 +1,5 @@
/* File tree walker functions.
- Copyright (C) 1996-2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 1996-2003, 2004, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
@@ -36,7 +36,7 @@ char *alloca ();
# endif
#endif
-#if defined _LIBC
+#ifdef _LIBC
# include <dirent.h>
# define NAMLEN(dirent) _D_EXACT_NAMLEN (dirent)
#else
@@ -59,6 +59,7 @@ char *alloca ();
#endif
#include <errno.h>
+#include <fcntl.h>
#include <ftw.h>
#include <limits.h>
#include <search.h>
@@ -585,7 +586,7 @@ ftw_startup (const char *dir, int is_nftw, void *func, int descriptors,
struct STAT st;
int result = 0;
int save_err;
- char *cwd = NULL;
+ int cwdfd = -1;
char *cp;
/* First make sure the parameters are reasonable. */
@@ -639,24 +640,33 @@ ftw_startup (const char *dir, int is_nftw, void *func, int descriptors,
/* Now go to the directory containing the initial file/directory. */
if (flags & FTW_CHDIR)
{
- /* GNU extension ahead. */
- cwd = __getcwd (NULL, 0);
- if (cwd == NULL)
+ /* We have to be able to go back to the current working
+ directory. The best way to do this is to use a file
+ descriptor. */
+ cwdfd = __open (".", O_RDONLY | O_DIRECTORY);
+ if (cwdfd == -1)
result = -1;
- else if (data.ftw.base > 0)
+ else
{
- /* Change to the directory the file is in. In data.dirbuf
- we have a writable copy of the file name. Just NUL
- terminate it for now and change the directory. */
- if (data.ftw.base == 1)
- /* I.e., the file is in the root directory. */
- result = __chdir ("/");
- else
+ if (data.maxdir > 1)
+ /* Account for the file descriptor we use here. */
+ --data.maxdir;
+
+ if (data.ftw.base > 0)
{
- char ch = data.dirbuf[data.ftw.base - 1];
- data.dirbuf[data.ftw.base - 1] = '\0';
- result = __chdir (data.dirbuf);
- data.dirbuf[data.ftw.base - 1] = ch;
+ /* Change to the directory the file is in. In data.dirbuf
+ we have a writable copy of the file name. Just NUL
+ terminate it for now and change the directory. */
+ if (data.ftw.base == 1)
+ /* I.e., the file is in the root directory. */
+ result = __chdir ("/");
+ else
+ {
+ char ch = data.dirbuf[data.ftw.base - 1];
+ data.dirbuf[data.ftw.base - 1] = '\0';
+ result = __chdir (data.dirbuf);
+ data.dirbuf[data.ftw.base - 1] = ch;
+ }
}
}
}
@@ -713,11 +723,10 @@ ftw_startup (const char *dir, int is_nftw, void *func, int descriptors,
}
/* Return to the start directory (if necessary). */
- if (cwd != NULL)
+ if (cwdfd != -1)
{
int save_err = errno;
- __chdir (cwd);
- free (cwd);
+ __fchdir (cwdfd);
__set_errno (save_err);
}