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* include/fcntl.h: Declare __have_atfcts.

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* sysdeps/unix/sysv/linux/faccessat.c: Use syscall if available.
	* sysdeps/unix/sysv/linux/fchmodat.c: Likewise.
	* sysdeps/unix/sysv/linux/fchownat.c: Likewise.
	* sysdeps/unix/sysv/linux/futimesat.c: Likewise.
	* sysdeps/unix/sysv/linux/linkat.c: Likewise.
	* sysdeps/unix/sysv/linux/mkdirat.c: Likewise.
	* sysdeps/unix/sysv/linux/openat.c: Likewise.
	* sysdeps/unix/sysv/linux/readlinkat.c: Likewise.
	* sysdeps/unix/sysv/linux/renameat.c: Likewise.
	* sysdeps/unix/sysv/linux/symlinkat.c: Likewise.
	* sysdeps/unix/sysv/linux/unlinkat.c: Likewise.
	* sysdeps/unix/sysv/linux/xmknodat.c: Likewise.
	* sysdeps/unix/sysv/linux/wordsize-64/fxstatat.c: Likewise.
	* sysdeps/unix/sysv/linux/kernel-features.h: Define __ASSUME_PSELECT,
	__ASSUME_PPOLL, and __ASSUME_ATFCTS if possible.

	* io/ppoll.c: New file.
	* io/Makefile (routines): Add ppoll.
	(CFLAGS-ppoll.c): Define.
	* io/Versions: Export ppoll for GLIBC_2.4.
	* io/sys/poll.h: Declare ppoll.
	* sysdeps/unix/sysv/linux/ppoll.c: New file.

	* misc/pselect.c: Make it possible to include this file to define
	the generic code as a static function.
	* sysdeps/unix/sysv/linux/pselect.c: New file.
This commit is contained in:
Ulrich Drepper
2006-01-20 07:08:05 +00:00
parent 93c04024a6
commit 7c65e9001b
25 changed files with 733 additions and 77 deletions
Download Patch File Download Diff File Expand all files Collapse all files

66
sysdeps/unix/sysv/linux/faccessat.c
View File

@ -25,8 +25,10 @@
#include <unistd.h>
#include <sys/types.h>
#include <alloca.h>
#include <kernel-features.h>
#include <sysdep.h>
int
faccessat (fd, file, mode, flag)
int fd;
@ -40,42 +42,61 @@ faccessat (fd, file, mode, flag)
return -1;
}
char *buf = NULL;
int result;
if (fd != AT_FDCWD && file[0] != '/')
#ifdef __NR_faccessat
if (flag == 0
# ifndef __ASSUME_ATFCTS
&& __have_atfcts >= 0
# endif
)
{
size_t filelen = strlen (file);
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 + filelen;
buf = alloca (buflen);
__snprintf (buf, buflen, procfd, fd, file);
file = buf;
result = INLINE_SYSCALL (faccessat, 3, fd, file, mode);
# ifndef __ASSUME_ATFCTS
if (result == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return result;
}
if ((!(flag & AT_EACCESS) || ! __libc_enable_secure)
#ifndef __NR_laccess /* Linux so far has no laccess syscall. */
&& !(flag & AT_SYMLINK_NOFOLLOW)
#endif
#ifndef __ASSUME_ATFCTS
if ((!(flag & AT_EACCESS) || ! __libc_enable_secure)
# ifndef __NR_laccess /* Linux so far has no laccess syscall. */
&& !(flag & AT_SYMLINK_NOFOLLOW)
# endif
)
{
/* If we are not set-uid or set-gid, access does the same. */
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
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 + filelen;
buf = alloca (buflen);
__snprintf (buf, buflen, procfd, fd, file);
file = buf;
}
int result;
INTERNAL_SYSCALL_DECL (err);
#ifdef __NR_laccess
# ifdef __NR_laccess
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (laccess, err, 2, file, mode);
else
#endif
# endif
result = INTERNAL_SYSCALL (access, err, 2, file, mode);
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 0))
@ -86,6 +107,7 @@ faccessat (fd, file, mode, flag)
return result;
}
#endif
struct stat64 stats;
if (fstatat64 (fd, file, &stats, flag & AT_SYMLINK_NOFOLLOW))