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* sysdeps/unix/sysv/linux/renameat.c: Move errno setting code in 

separate function __atfct_seterrno_2.
	* include/fcntl.h: Declare __atfct_seterrno_2.
	* posix/unistd.h: Declare linkat, symlinkat, readlinkat.
	* io/Makefile (routines): Add linkat, symlinkat, readlinkat.
	* io/Versions [GLIBC_2.4]: Export linkat, symlinkat, readlinkat.
	* io/linkat.c: New file.
	* io/readlinkat.c: New file.
	* io/symlinkat.c: New file.
	* sysdeps/unix/sysv/linux/linkat.c: New file.
	* sysdeps/unix/sysv/linux/readlinkat.c: New file.
	* sysdeps/unix/sysv/linux/symlinkat.c: New file.
This commit is contained in:
Ulrich Drepper 2005-12-16 00:24:16 +00:00
parent fc30e8dafa
commit 5c46041a9c
12 changed files with 415 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
ChangeLog
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@ -1,3 +1,18 @@
2005-12-15 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/renameat.c: Move errno setting code in
separate function __atfct_seterrno_2.
* include/fcntl.h: Declare __atfct_seterrno_2.
* posix/unistd.h: Declare linkat, symlinkat, readlinkat.
* io/Makefile (routines): Add linkat, symlinkat, readlinkat.
* io/Versions [GLIBC_2.4]: Export linkat, symlinkat, readlinkat.
* io/linkat.c: New file.
* io/readlinkat.c: New file.
* io/symlinkat.c: New file.
* sysdeps/unix/sysv/linux/linkat.c: New file.
* sysdeps/unix/sysv/linux/readlinkat.c: New file.
* sysdeps/unix/sysv/linux/symlinkat.c: New file.
2005-12-15 Roland McGrath <roland@redhat.com>
[BZ #1997]

4
NEWS
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@ -1,4 +1,4 @@
GNU C Library NEWS -- history of user-visible changes. 2005-12-02
GNU C Library NEWS -- history of user-visible changes. 2005-12-15
Copyright (C) 1992-2002,2003,2004,2005 Free Software Foundation, Inc.
See the end for copying conditions.
@ -28,7 +28,7 @@ Version 2.4
recommend using the stable 2.3 branch.
* New interfaces: fdopendir, openat, fstatat, fchownat, futimesat, renameat,
unlinkat, mkdirat, mkfifoat, mknodat.
unlinkat, mkdirat, mkfifoat, mknodat, linkat, symlinkat, readlinkat.
Version 2.3.6

3
include/fcntl.h
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@ -21,5 +21,8 @@ libc_hidden_proto (__fcntl)
/* Helper functions for the various *at functions. For Linux. */
extern void __atfct_seterrno (int errval, int fd, const char *buf)
attribute_hidden;
extern void __atfct_seterrno_2 (int errval, int fd1, const char *buf1,
int fd2, const char *buf2)
attribute_hidden;
#endif

2
io/Makefile
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@ -45,7 +45,7 @@ routines := \
getcwd getwd getdirname \
chown fchown lchown fchownat \
ttyname ttyname_r isatty \
link symlink readlink \
link linkat symlink symlinkat readlink readlinkat \
unlink unlinkat rmdir \
ftw ftw64 fts poll \
posix_fadvise posix_fadvise64 \

3
io/Versions
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@ -100,8 +100,11 @@ libc {
GLIBC_2.4 {
fchownat;
__fxstatat; __fxstatat64;
linkat;
mkdirat; mkfifoat; __xmknodat;
openat; openat64;
readlinkat;
symlinkat;
unlinkat;
}
}

51
io/linkat.c Normal file
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@ -0,0 +1,51 @@
/* Copyright (C) 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <unistd.h>
/* Make a link to FROM relative to FROMFD called TO relative to TOFD. */
int
linkat (fromfd, from, tofd, to)
int fromfd;
const char *from;
int tofd;
const char *to;
{
if (from == NULL || to == NULL)
{
__set_errno (EINVAL);
return -1;
}
if ((tofd != AT_FDCWD && tofd < 0 && *to != '/')
|| (fromfd != AT_FDCWD && fromfd < 0 && *from != '/'))
{
__set_errno (EBADF);
return -1;
}
__set_errno (ENOSYS);
return -1;
}
stub_warning (linkat)
#include <stub-tag.h>

50
io/readlinkat.c Normal file
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@ -0,0 +1,50 @@
/* Copyright (C) 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
/* Read the contents of the symbolic link PATH relative to FD into no
more than LEN bytes of BUF. The contents are not null-terminated.
Returns the number of characters read, or -1 for errors. */
int
readlinkat (fd, path, buf, len)
int fd;
const char *path;
char *buf;
size_t len;
{
if (path == NULL)
{
__set_errno (EINVAL);
return -1;
}
if (fd != AT_FDCWD && fd < 0 && *path != '/')
{
__set_errno (EBADF);
return -1;
}
__set_errno (ENOSYS);
return -1;
}
stub_warning (readlinkat)
#include <stub-tag.h>

49
io/symlinkat.c Normal file
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@ -0,0 +1,49 @@
/* Copyright (C) 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <unistd.h>
/* Make a link to FROM called TO relative to FD. */
int
symlinkat (from, fd, to)
const char *from;
int fd;
const char *to;
{
if (from == NULL || to == NULL)
{
__set_errno (EINVAL);
return -1;
}
if (fd != AT_FDCWD && fd < 0 && *to != '/')
{
__set_errno (EBADF);
return -1;
}
__set_errno (ENOSYS);
return -1;
}
stub_warning (symlinkat)
#include <stub-tag.h>

18
posix/unistd.h
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@ -742,6 +742,13 @@ extern int ttyslot (void) __THROW;
extern int link (__const char *__from, __const char *__to)
__THROW __nonnull ((1, 2)) __wur;
#ifdef __USE_GNU
/* Like link but relative paths in TO and FROM are interpreted relative
to FROMFD and TOFD respectively. */
extern int linkat (int __fromfd, __const char *__from, int __tofd,
__const char *__to) __THROW __nonnull ((2, 4)) __wur;
#endif
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
/* Make a symbolic link to FROM named TO. */
extern int symlink (__const char *__from, __const char *__to)
@ -754,6 +761,17 @@ extern int readlink (__const char *__restrict __path, char *__restrict __buf,
size_t __len) __THROW __nonnull ((1, 2)) __wur;
#endif /* Use BSD. */
#ifdef __USE_GNU
/* Like symlink but a relative path in TO is interpreted relative to TOFD. */
extern int symlinkat (__const char *__from, int __tofd,
__const char *__to) __THROW __nonnull ((1, 3)) __wur;
/* Like readlink but a relative PATH is interpreted relative to FD. */
extern int readlinkat (int __fd, __const char *__restrict __path,
char *__restrict __buf, size_t __len)
__THROW __nonnull ((2, 3)) __wur;
#endif
/* Remove the link NAME. */
extern int unlink (__const char *__name) __THROW __nonnull ((1));

87
sysdeps/unix/sysv/linux/linkat.c Normal file
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@ -0,0 +1,87 @@
/* Copyright (C) 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#include <sysdep.h>
#include <unistd.h>
/* Make a link to FROM named TO but relative paths in TO and FROM are
interpreted relative to FROMFD and TOFD respectively. */
int
linkat (fromfd, from, tofd, to)
int fromfd;
const char *from;
int tofd;
const char *to;
{
static const char procfd[] = "/proc/self/fd/%d/%s";
char *buffrom = NULL;
if (fromfd != AT_FDCWD && from[0] != '/')
{
size_t filelen = strlen (from);
/* Buffer for the path name we are going to use. It consists of
- the string /proc/self/fd/
- the file descriptor number
- the file name provided.
The final NUL is included in the sizeof. A bit of overhead
due to the format elements compensates for possible negative
numbers. */
size_t buflen = sizeof (procfd) + sizeof (int) * 3 + filelen;
buffrom = alloca (buflen);
__snprintf (buffrom, buflen, procfd, fromfd, from);
from = buffrom;
}
char *bufto = NULL;
if (tofd != AT_FDCWD && to[0] != '/')
{
size_t filelen = strlen (to);
/* Buffer for the path name we are going to use. It consists of
- the string /proc/self/fd/
- the file descriptor number
- the file name provided.
The final NUL is included in the sizeof. A bit of overhead
due to the format elements compensates for possible negative
numbers. */
size_t buflen = sizeof (procfd) + sizeof (int) * 3 + filelen;
bufto = alloca (buflen);
__snprintf (bufto, buflen, procfd, tofd, to);
to = bufto;
}
INTERNAL_SYSCALL_DECL (err);
int result = INTERNAL_SYSCALL (link, err, 2, from, to);
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 0))
{
__atfct_seterrno_2 (INTERNAL_SYSCALL_ERRNO (result, err), tofd, bufto,
fromfd, buffrom);
result = -1;
}
return result;
}

69
sysdeps/unix/sysv/linux/readlinkat.c Normal file
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@ -0,0 +1,69 @@
/* Copyright (C) 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysdep.h>
#include <unistd.h>
/* Read the contents of the symbolic link PATH relative to FD into no
more than LEN bytes of BUF. */
int
readlinkat (fd, path, buf, len)
int fd;
const char *path;
char *buf;
size_t len;
{
char *pathbuf = NULL;
if (fd != AT_FDCWD && path[0] != '/')
{
size_t pathlen = strlen (path);
static const char procfd[] = "/proc/self/fd/%d/%s";
/* Buffer for the path name we are going to use. It consists of
- the string /proc/self/fd/
- the file descriptor number
- the file name provided.
The final NUL is included in the sizeof. A bit of overhead
due to the format elements compensates for possible negative
numbers. */
size_t buflen = sizeof (procfd) + sizeof (int) * 3 + pathlen;
pathbuf = __alloca (buflen);
__snprintf (pathbuf, buflen, procfd, fd, path);
path = pathbuf;
}
INTERNAL_SYSCALL_DECL (err);
int result = INTERNAL_SYSCALL (readlink, err, 3, path, buf, len);
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 0))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, pathbuf);
result = -1;
}
return result;
}

67
sysdeps/unix/sysv/linux/symlinkat.c Normal file
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@ -0,0 +1,67 @@
/* Copyright (C) 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysdep.h>
#include <unistd.h>
/* Make a symbolic link to FROM named TO relative to TOFD. */
int
symlinkat (from, tofd, to)
const char *from;
int tofd;
const char *to;
{
char *buf = NULL;
if (tofd != AT_FDCWD && to[0] != '/')
{
size_t tolen = strlen (to);
static const char procfd[] = "/proc/self/fd/%d/%s";
/* Buffer for the path name we are going to use. It consists of
- the string /proc/self/fd/
- the file descriptor number
- the file name provided.
The final NUL is included in the sizeof. A bit of overhead
due to the format elements compensates for possible negative
numbers. */
size_t buflen = sizeof (procfd) + sizeof (int) * 3 + tolen;
buf = __alloca (buflen);
__snprintf (buf, buflen, procfd, tofd, to);
to = buf;
}
INTERNAL_SYSCALL_DECL (err);
int result = INTERNAL_SYSCALL (symlink, err, 2, from, to);
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 0))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), tofd, buf);
result = -1;
}
return result;
}