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* io/ftw.c (ftw_startup): Use fchdir to return to original

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directory for FTW_CHDIR.
This commit is contained in:
Ulrich Drepper 2006-02-05 21:19:53 +00:00
parent df6871cb7e
commit becac6c5b1
2 changed files with 35 additions and 21 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2006-02-05 Ulrich Drepper <drepper@redhat.com>
* io/ftw.c (ftw_startup): Use fchdir to return to original
directory for FTW_CHDIR.
2006-02-03 Ulrich Drepper <drepper@redhat.com>
* manual/stdio.texi (Formatted Output Functions): Fix make_message

51
io/ftw.c
View File

@ -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);
}