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Remove __ASSUME_ATFCTS conditionals in sysdeps/unix/sysv/linux/. 

This patch cleans up for __ASSUME_ATFCTS now always being true for the
supported Linux kernel versions by removing conditional code in
sysdeps/unix/sysv/linux.  Several fchownat.c files that were only
present because of differences in the fallback syscalls used
(depending on the architecture-specific names of chown-related
syscalls for 32-bit uids) are removed.  Files that looks like they
could be replaced by syscalls.list entries have the standard "Consider
moving to syscalls.list." comment (see bug 14138) added.  Conditionals
on the relevant __NR_* syscall numbers being defined are also removed,
since my analysis indicated that the relevant syscalls are always
defined for all relevant kernel versions using any affected file.
Much of the removed fallback code had unbounded stack allocations, so
this reduces the number of cases to consider for anyone reviewing uses
of alloca and VLAs in glibc.

There remain tests of __ASSUME_ATFCTS in io/openat.c (to determine
whether to define __have_atfcts) and sysdeps/posix/getcwd.c (which
also uses __have_atfcts); thus, the definition of __ASSUME_ATFCTS
remains in kernel-features.h.  The logical condition relevant there is
whether openat64_not_cancel_3 is known to work.  Hurd doesn't use this
version of getcwd at all, so the conditionals in getcwd.c are always
true in glibc.  However, this code is also used in gnulib.  So the
best way to deal with the conditionals there may be for gnulib people
to deal with merging all relevant changes in both directions between
the glibc and gnulib versions of this file, at the end of which the
openat conditionals should be in whatever form is best for gnulib, and
hardcoded in the _LIBC case to having openat supported.

Tested by comparing before-and-after disassembly of installed
(stripped) shared libraries, on x86_64 and x86.  On x86 the patch made
no change to the disassembly; on x86_64, the only changes were in
readlinkat, where formerly the return value from the readlinkat
syscall was stored in an int variable before being converted to
ssize_t for the return, and now the return value is returned directly
without truncation to int.  I think it's clearly correct not to
truncate the return value (although I also think the truncation would
not have been a user-visible bug because the kernel would never have
returned a value it could have affected).

	* include/fcntl.h (__atfct_seterrno): Remove prototype.
	(__atfct_seterrno_2): Likewise.
	* sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c: Do not include
	<kernel-features.h>.
	(__ASSUME_ATFCTS): Do not undefine and redefine.
	* sysdeps/unix/sysv/linux/alpha/fxstatat.c [__ASSUME_ATFCTS]
	(__have_atfcts): Remove conditional definition.
	(__fxstatat([__NR_fstatat64]: Make code unconditional.
	(__fxstatat) [!__ASSUME_ATFCTS]: Remove conditional code and code
	unreachable if [__ASSUME_ATFCTS].
	* sysdeps/unix/sysv/linux/dl-fxstatat64.c (__ASSUME_ATFCTS): Do
	not undefine and redefine.
	* sysdeps/unix/sysv/linux/faccessat.c: Do not include
	<kernel-features.h>.
	(faccessat) [__NR_faccessat]: Make code unconditional.
	(faccessat) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/fchmodat.c: Do not include
	<kernel-features.h>.
	(fchmodat) [__NR_fchmodat]: Make code unconditional.
	(fchmodat) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/fchownat.c: Do not include
	<kernel-features.h>.
	(fchownat) [__NR_fchownat]: Make code unconditional.
	(fchownat) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/futimesat.c: Do not include
	<kernel-features.h>.
	(futimesat) [__NR_futimesat]: Make code unconditional.
	(futimesat) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/fxstatat.c: Do not include
	<kernel-features.h>.
	(__fxstatat) [__NR_newfstatat]: Make code unconditional.
	(__fxstatat) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/fxstatat64.c: Do not include
	<kernel-features.h>.
	(__fxstatat64) [__NR_fstatat64]: Make code unconditional.
	(__fxstatat64) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/i386/fchownat.c: Remove file.
	* sysdeps/unix/sysv/linux/i386/fxstatat.c: Do not include
	<kernel-features.h>.
	(__fxstatat) [__NR_fstatat64]: Make code unconditional.
	(__fxstatat) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/linkat.c: Do not include
	<kernel-features.h>.
	(linkat) [__NR_linkat]: Make code unconditional.
	(linkat) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/m68k/fchownat.c: Remove file.
	* sysdeps/unix/sysv/linux/mips/mips64/fxstatat64.c: Do not include
	<kernel-features.h>.
	(__fxstatat64) [__NR_newfstatat]: Make code unconditional.
	(__fxstatat64) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/mkdirat.c: Do not include
	<kernel-features.h>.
	(mkdirat) [__NR_mkdirat]: Make code unconditional.
	(mkdirat) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/openat.c: Do not include
	<kernel-features.h>.
	[!__ASSUME_ATFCTS] (__atfct_seterrno): Remove function.
	[!__ASSUME_ATFCTS] (__have_atfcts): Remove variable.
	(OPENAT_NOT_CANCEL) [__NR_openat]: Make code unconditional.
	(OPENAT_NOT_CANCEL) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/powerpc/fchownat.c: Remove file.
	* sysdeps/unix/sysv/linux/readlinkat.c: Do not include
	<kernel-features.h>.
	(readlinkat) [__NR_readlinkat]: Make code unconditional.
	(readlinkat) [!__ASSUME_ATFCTS]: Remove conditional code.  Return
	result of INLINE_SYSCALL directly, not via int variable.
	* sysdeps/unix/sysv/linux/renameat.c: Do not include
	<kernel-features.h>.
	[!__ASSUME_ATFCTS] (__atfct_seterrno_2): Remove function.
	(renameat) [__NR_renameat]: Make code unconditional.
	(renameat) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/s390/s390-32/fchownat.c: Remove file.
	* sysdeps/unix/sysv/linux/sh/fchownat.c: Remove file.
	* sysdeps/unix/sysv/linux/sparc/sparc32/fchownat.c: Remove file.
	* sysdeps/unix/sysv/linux/sparc/sparc64/dl-fxstatat64.c
	(__ASSUME_ATFCTS): Do not undefine and redefine.
	* sysdeps/unix/sysv/linux/symlinkat.c: Do not include
	<kernel-features.h>.
	(symlinkat) [__NR_symlinkat]: Make code unconditional.
	(symlinkat) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/unlinkat.c: Do not include
	<kernel-features.h>.
	(unlinkat) [__NR_unlinkat]: Make code unconditional.
	(unlinkat) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/wordsize-64/dl-fxstatat64.c
	(__ASSUME_ATFCTS): Do not undefine and redefine.
	* sysdeps/unix/sysv/linux/wordsize-64/fxstatat.c: Do not include
	<kernel-features.h>.
	(__fxstatat) [__NR_newfstatat]: Make code unconditional.
	(__fxstatat) [!__ASSUME_ATFCTS]: Remove conditional code.
	* sysdeps/unix/sysv/linux/xmknodat.c: Do not include
	<kernel-features.h>.
	(__xmknodat) [__NR_mknodat]: Make code unconditional.
	(__xmknodat) [!__ASSUME_ATFCTS]: Remove conditional code.
This commit is contained in:
Joseph Myers 2014-06-20 15:41:35 +00:00
parent 224c6c51c5
commit 809fdf0d23
30 changed files with 147 additions and 1580 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

97
ChangeLog
View File

@ -1,3 +1,100 @@
2014-06-20 Joseph Myers <joseph@codesourcery.com>
* include/fcntl.h (__atfct_seterrno): Remove prototype.
(__atfct_seterrno_2): Likewise.
* sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c: Do not include
<kernel-features.h>.
(__ASSUME_ATFCTS): Do not undefine and redefine.
* sysdeps/unix/sysv/linux/alpha/fxstatat.c [__ASSUME_ATFCTS]
(__have_atfcts): Remove conditional definition.
(__fxstatat([__NR_fstatat64]: Make code unconditional.
(__fxstatat) [!__ASSUME_ATFCTS]: Remove conditional code and code
unreachable if [__ASSUME_ATFCTS].
* sysdeps/unix/sysv/linux/dl-fxstatat64.c (__ASSUME_ATFCTS): Do
not undefine and redefine.
* sysdeps/unix/sysv/linux/faccessat.c: Do not include
<kernel-features.h>.
(faccessat) [__NR_faccessat]: Make code unconditional.
(faccessat) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/fchmodat.c: Do not include
<kernel-features.h>.
(fchmodat) [__NR_fchmodat]: Make code unconditional.
(fchmodat) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/fchownat.c: Do not include
<kernel-features.h>.
(fchownat) [__NR_fchownat]: Make code unconditional.
(fchownat) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/futimesat.c: Do not include
<kernel-features.h>.
(futimesat) [__NR_futimesat]: Make code unconditional.
(futimesat) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/fxstatat.c: Do not include
<kernel-features.h>.
(__fxstatat) [__NR_newfstatat]: Make code unconditional.
(__fxstatat) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/fxstatat64.c: Do not include
<kernel-features.h>.
(__fxstatat64) [__NR_fstatat64]: Make code unconditional.
(__fxstatat64) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/i386/fchownat.c: Remove file.
* sysdeps/unix/sysv/linux/i386/fxstatat.c: Do not include
<kernel-features.h>.
(__fxstatat) [__NR_fstatat64]: Make code unconditional.
(__fxstatat) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/linkat.c: Do not include
<kernel-features.h>.
(linkat) [__NR_linkat]: Make code unconditional.
(linkat) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/m68k/fchownat.c: Remove file.
* sysdeps/unix/sysv/linux/mips/mips64/fxstatat64.c: Do not include
<kernel-features.h>.
(__fxstatat64) [__NR_newfstatat]: Make code unconditional.
(__fxstatat64) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/mkdirat.c: Do not include
<kernel-features.h>.
(mkdirat) [__NR_mkdirat]: Make code unconditional.
(mkdirat) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/openat.c: Do not include
<kernel-features.h>.
[!__ASSUME_ATFCTS] (__atfct_seterrno): Remove function.
[!__ASSUME_ATFCTS] (__have_atfcts): Remove variable.
(OPENAT_NOT_CANCEL) [__NR_openat]: Make code unconditional.
(OPENAT_NOT_CANCEL) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/powerpc/fchownat.c: Remove file.
* sysdeps/unix/sysv/linux/readlinkat.c: Do not include
<kernel-features.h>.
(readlinkat) [__NR_readlinkat]: Make code unconditional.
(readlinkat) [!__ASSUME_ATFCTS]: Remove conditional code. Return
result of INLINE_SYSCALL directly, not via int variable.
* sysdeps/unix/sysv/linux/renameat.c: Do not include
<kernel-features.h>.
[!__ASSUME_ATFCTS] (__atfct_seterrno_2): Remove function.
(renameat) [__NR_renameat]: Make code unconditional.
(renameat) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/s390/s390-32/fchownat.c: Remove file.
* sysdeps/unix/sysv/linux/sh/fchownat.c: Remove file.
* sysdeps/unix/sysv/linux/sparc/sparc32/fchownat.c: Remove file.
* sysdeps/unix/sysv/linux/sparc/sparc64/dl-fxstatat64.c
(__ASSUME_ATFCTS): Do not undefine and redefine.
* sysdeps/unix/sysv/linux/symlinkat.c: Do not include
<kernel-features.h>.
(symlinkat) [__NR_symlinkat]: Make code unconditional.
(symlinkat) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/unlinkat.c: Do not include
<kernel-features.h>.
(unlinkat) [__NR_unlinkat]: Make code unconditional.
(unlinkat) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/wordsize-64/dl-fxstatat64.c
(__ASSUME_ATFCTS): Do not undefine and redefine.
* sysdeps/unix/sysv/linux/wordsize-64/fxstatat.c: Do not include
<kernel-features.h>.
(__fxstatat) [__NR_newfstatat]: Make code unconditional.
(__fxstatat) [!__ASSUME_ATFCTS]: Remove conditional code.
* sysdeps/unix/sysv/linux/xmknodat.c: Do not include
<kernel-features.h>.
(__xmknodat) [__NR_mknodat]: Make code unconditional.
(__xmknodat) [!__ASSUME_ATFCTS]: Remove conditional code.
2014-06-20 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/x86_64/multiarch/rtld-strlen.S: Removed.

8
include/fcntl.h
View File

@ -31,14 +31,6 @@ extern int __openat_2 (int __fd, const char *__path, int __oflag);
extern int __openat64_2 (int __fd, const char *__path, int __oflag);
/* 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;
/* Flag determining whether the *at system calls are available. */
extern int __have_atfcts attribute_hidden;

8
sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c
View File

@ -1,9 +1 @@
/* In this implementation we do not really care whether the call fails
because of missing kernel support since we do not even call the
function in this case. */
/* For Alpha, in <kernel-features.h> we redefine the default definition of
when __ASSUME_ATFCTS is present. The hack must wait until after that. */
#include <kernel-features.h>
#undef __ASSUME_ATFCTS
#define __ASSUME_ATFCTS 1
#include "fxstatat.c"

64
sysdeps/unix/sysv/linux/alpha/fxstatat.c
View File

@ -29,10 +29,6 @@
#undef __fxstatat64
#ifdef __ASSUME_ATFCTS
# define __have_atfcts 1
#endif
/* Get information about the file NAME in BUF. */
int
__fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
@ -45,67 +41,11 @@ __fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
cannot actually check this, lest the compiler not optimize the rest
of the function away. */
#ifdef __NR_fstatat64
if (__have_atfcts >= 0)
{
result = INTERNAL_SYSCALL (fstatat64, err, 4, fd, file, st, flag);
if (__builtin_expect (!INTERNAL_SYSCALL_ERROR_P (result, err), 1))
return result;
errno_out = INTERNAL_SYSCALL_ERRNO (result, err);
#ifndef __ASSUME_ATFCTS
if (errno_out == ENOSYS)
__have_atfcts = -1;
else
#endif
{
__set_errno (errno_out);
return -1;
}
}
#endif /* __NR_fstatat64 */
if (flag & ~AT_SYMLINK_NOFOLLOW)
{
__set_errno (EINVAL);
return -1;
}
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__builtin_expect (filelen == 0, 0))
{
__set_errno (ENOENT);
return -1;
}
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;
}
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (lstat64, err, 2, file, st);
else
result = INTERNAL_SYSCALL (stat64, err, 2, file, st);
result = INTERNAL_SYSCALL (fstatat64, err, 4, fd, file, st, flag);
if (__builtin_expect (!INTERNAL_SYSCALL_ERROR_P (result, err), 1))
return result;
errno_out = INTERNAL_SYSCALL_ERRNO (result, err);
__atfct_seterrno (errno_out, fd, buf);
__set_errno (errno_out);
return -1;
}
libc_hidden_def (__fxstatat)

5
sysdeps/unix/sysv/linux/dl-fxstatat64.c
View File

@ -1,6 +1 @@
/* In this implementation we do not really care whether the call fails
because of missing kernel support since we do not even call the
function in this case. */
#undef __ASSUME_ATFCTS
#define __ASSUME_ATFCTS 1
#include <fxstatat64.c>

73
sysdeps/unix/sysv/linux/faccessat.c
View File

@ -24,7 +24,6 @@
#include <unistd.h>
#include <sys/types.h>
#include <alloca.h>
#include <kernel-features.h>
#include <sysdep.h>
@ -41,76 +40,8 @@ faccessat (fd, file, mode, flag)
return -1;
}
#ifdef __NR_faccessat
if ((flag == 0 || ((flag & ~AT_EACCESS) == 0 && ! __libc_enable_secure))
# ifndef __ASSUME_ATFCTS
&& __have_atfcts >= 0
# endif
)
{
int result = INLINE_SYSCALL (faccessat, 3, fd, file, mode);
# ifndef __ASSUME_ATFCTS
if (result == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return result;
}
#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);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (laccess, err, 2, file, mode);
else
# endif
result = INTERNAL_SYSCALL (access, err, 2, file, mode);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err)))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf);
result = -1;
}
return result;
}
#endif
if ((flag == 0 || ((flag & ~AT_EACCESS) == 0 && ! __libc_enable_secure)))
return INLINE_SYSCALL (faccessat, 3, fd, file, mode);
struct stat64 stats;
if (__fxstatat64 (_STAT_VER, fd, file, &stats, flag & AT_SYMLINK_NOFOLLOW))

63
sysdeps/unix/sysv/linux/fchmodat.c
View File

@ -24,7 +24,6 @@
#include <unistd.h>
#include <sys/types.h>
#include <alloca.h>
#include <kernel-features.h>
#include <sysdep.h>
int
@ -47,65 +46,5 @@ fchmodat (fd, file, mode, flag)
}
#endif
int result;
#ifdef __NR_fchmodat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
result = INLINE_SYSCALL (fchmodat, 3, fd, file, mode);
# ifndef __ASSUME_ATFCTS
if (result == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return result;
}
#endif
#ifndef __ASSUME_ATFCTS
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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;
}
INTERNAL_SYSCALL_DECL (err);
# ifdef __NR_lchmod
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (lchmod, err, 2, file, mode);
else
# endif
result = INTERNAL_SYSCALL (chmod, err, 2, file, mode);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err)))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf);
result = -1;
}
return result;
#endif
return INLINE_SYSCALL (fchmodat, 3, fd, file, mode);
}

69
sysdeps/unix/sysv/linux/fchownat.c
View File

@ -24,9 +24,10 @@
#include <sys/types.h>
#include <alloca.h>
#include <sysdep.h>
#include <kernel-features.h>
/* Consider moving to syscalls.list. */
/* Change the owner and group of FILE. */
int
fchownat (fd, file, owner, group, flag)
@ -36,69 +37,5 @@ fchownat (fd, file, owner, group, flag)
gid_t group;
int flag;
{
int result;
#ifdef __NR_fchownat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
result = INLINE_SYSCALL (fchownat, 5, fd, file, owner, group, flag);
# ifndef __ASSUME_ATFCTS
if (result == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return result;
}
#endif
#ifndef __ASSUME_ATFCTS
if (flag & ~AT_SYMLINK_NOFOLLOW)
{
__set_errno (EINVAL);
return -1;
}
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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;
}
INTERNAL_SYSCALL_DECL (err);
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (lchown, err, 3, file, owner, group);
else
result = INTERNAL_SYSCALL (chown, err, 3, file, owner, group);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err)))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf);
result = -1;
}
return result;
#endif
return INLINE_SYSCALL (fchownat, 5, fd, file, owner, group, flag);
}

103
sysdeps/unix/sysv/linux/futimesat.c
View File

@ -23,7 +23,6 @@
#include <utime.h>
#include <sys/time.h>
#include <sysdep.h>
#include <kernel-features.h>
/* Change the access time of FILE relative to FD to TVP[0] and
@ -34,106 +33,8 @@ futimesat (fd, file, tvp)
const char *file;
const struct timeval tvp[2];
{
int result;
#ifdef __NR_futimesat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
if (file == NULL)
return __futimes (fd, tvp);
result = INLINE_SYSCALL (futimesat, 3, fd, file, tvp);
# ifndef __ASSUME_ATFCTS
if (result == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return result;
}
#endif
#ifndef __ASSUME_ATFCTS
char *buf = NULL;
if (file == NULL)
{
static const char procfd[] = "/proc/self/fd/%d";
/* Buffer for the path name we are going to use. It consists of
- the string /proc/self/fd/
- the file descriptor number.
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;
buf = alloca (buflen);
return __futimes (fd, tvp);
__snprintf (buf, buflen, procfd, fd);
file = buf;
}
else if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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;
}
INTERNAL_SYSCALL_DECL (err);
# ifdef __NR_utimes
result = INTERNAL_SYSCALL (utimes, err, 2, file, tvp);
if (__glibc_likely (!INTERNAL_SYSCALL_ERROR_P (result, err)))
return result;
# ifndef __ASSUME_UTIMES
if (INTERNAL_SYSCALL_ERRNO (result, err) != ENOSYS)
goto fail;
# endif
# endif
/* The utimes() syscall does not exist or is not available in the
used kernel. Use utime(). For this we have to convert to the
data format utime() expects. */
# ifndef __ASSUME_UTIMES
struct utimbuf tmp;
struct utimbuf *times;
if (tvp != NULL)
{
times = &tmp;
tmp.actime = tvp[0].tv_sec + tvp[0].tv_usec / 1000000;
tmp.modtime = tvp[1].tv_sec + tvp[1].tv_usec / 1000000;
}
else
times = NULL;
result = INTERNAL_SYSCALL (utime, err, 2, file, times);
if (__glibc_likely (!INTERNAL_SYSCALL_ERROR_P (result, err)))
return result;
fail:
# endif
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf);
return -1;
#endif
return INLINE_SYSCALL (futimesat, 3, fd, file, tvp);
}

88
sysdeps/unix/sysv/linux/fxstatat.c
View File

@ -29,7 +29,6 @@
#include <sysdep.h>
#include <sys/syscall.h>
#include <kernel-features.h>
#include <xstatconv.h>
@ -45,97 +44,20 @@ __fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
struct kernel_stat kst;
#endif
#ifdef __NR_newfstatat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
result = INTERNAL_SYSCALL (newfstatat, err, 4, fd, file, &kst, flag);
if (!__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1))
{
result = INTERNAL_SYSCALL (newfstatat, err, 4, fd, file, &kst, flag);
# ifndef __ASSUME_ATFCTS
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1)
&& INTERNAL_SYSCALL_ERRNO (result, err) == ENOSYS)
__have_atfcts = -1;
else
# endif
if (!__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1))
{
#ifdef STAT_IS_KERNEL_STAT
return 0;
return 0;
#else
return __xstat_conv (vers, &kst, st);
return __xstat_conv (vers, &kst, st);
#endif
}
else
{
__set_errno (INTERNAL_SYSCALL_ERRNO (result, err));
return -1;
}
}
#endif
if (flag & ~AT_SYMLINK_NOFOLLOW)
{
__set_errno (EINVAL);
return -1;
}
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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;
}
if (vers == _STAT_VER_KERNEL)
{
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (lstat, err, 2, file,
(struct kernel_stat *) st);
else
result = INTERNAL_SYSCALL (stat, err, 2, file,
(struct kernel_stat *) st);
if (__glibc_likely (!INTERNAL_SYSCALL_ERROR_P (result, err)))
return result;
}
#ifdef STAT_IS_KERNEL_STAT
else
{
__set_errno (EINVAL);
__set_errno (INTERNAL_SYSCALL_ERRNO (result, err));
return -1;
}
#else
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (lstat, err, 2, file, &kst);
else
result = INTERNAL_SYSCALL (stat, err, 2, file, &kst);
if (__glibc_likely (!INTERNAL_SYSCALL_ERROR_P (result, err)))
return __xstat_conv (vers, &kst, st);
#endif
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf);
return -1;
}
libc_hidden_def (__fxstatat)
#ifdef XSTAT_IS_XSTAT64

75
sysdeps/unix/sysv/linux/fxstatat64.c
View File

@ -26,8 +26,6 @@
#include <sysdep.h>
#include <sys/syscall.h>
#include <kernel-features.h>
/* Get information about the file NAME in BUF. */
int
@ -42,76 +40,13 @@ __fxstatat64 (int vers, int fd, const char *file, struct stat64 *st, int flag)
int result;
INTERNAL_SYSCALL_DECL (err);
#ifdef __NR_fstatat64
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
result = INTERNAL_SYSCALL (fstatat64, err, 4, fd, file, st, flag);
if (!__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1))
return 0;
else
{
result = INTERNAL_SYSCALL (fstatat64, err, 4, fd, file, st, flag);
# ifndef __ASSUME_ATFCTS
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1)
&& INTERNAL_SYSCALL_ERRNO (result, err) == ENOSYS)
__have_atfcts = -1;
else
# endif
if (!__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1))
return 0;
else
{
__set_errno (INTERNAL_SYSCALL_ERRNO (result, err));
return -1;
}
}
#endif
#ifndef __ASSUME_ATFCTS
if (flag & ~AT_SYMLINK_NOFOLLOW)
{
__set_errno (EINVAL);
__set_errno (INTERNAL_SYSCALL_ERRNO (result, err));
return -1;
}
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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;
}
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (lstat64, err, 2, file, st);
else
result = INTERNAL_SYSCALL (stat64, err, 2, file, st);
if (__glibc_likely (!INTERNAL_SYSCALL_ERROR_P (result, err)))
{
# if defined _HAVE_STAT64___ST_INO && __ASSUME_ST_INO_64_BIT == 0
if (st->__st_ino != (__ino_t) st->st_ino)
st->st_ino = st->__st_ino;
# endif
return result;
}
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf);
return -1;
#endif
}
libc_hidden_def (__fxstatat64)

101
sysdeps/unix/sysv/linux/i386/fchownat.c
View File

@ -1,101 +0,0 @@
/* Copyright (C) 2005-2014 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, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sysdep.h>
#include <sys/syscall.h>
#include <shlib-compat.h>
#include <linux/posix_types.h>
#include <kernel-features.h>
int
fchownat (int fd, const char *file, uid_t owner, gid_t group, int flag)
{
int result;
#ifdef __NR_fchownat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
result = INLINE_SYSCALL (fchownat, 5, fd, file, owner, group, flag);
# ifndef __ASSUME_ATFCTS
if (result == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return result;
}
#endif
#ifndef __ASSUME_ATFCTS
if (flag & ~AT_SYMLINK_NOFOLLOW)
{
__set_errno (EINVAL);
return -1;
}
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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;
}
INTERNAL_SYSCALL_DECL (err);
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (lchown32, err, 3, file, owner, group);
else
result = INTERNAL_SYSCALL (chown32, err, 3, file, owner, group);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err)))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf);
return -1;
}
return result;
#endif
}

86
sysdeps/unix/sysv/linux/i386/fxstatat.c
View File

@ -30,8 +30,6 @@
#include <sysdep.h>
#include <sys/syscall.h>
#include <kernel-features.h>
#include <xstatconv.h>
@ -43,88 +41,14 @@ __fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
INTERNAL_SYSCALL_DECL (err);
struct stat64 st64;
#ifdef __NR_fstatat64
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
result = INTERNAL_SYSCALL (fstatat64, err, 4, fd, file, &st64, flag);
if (!__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1))
return __xstat32_conv (vers, &st64, st);
else
{
result = INTERNAL_SYSCALL (fstatat64, err, 4, fd, file, &st64, flag);
# ifndef __ASSUME_ATFCTS
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1)
&& INTERNAL_SYSCALL_ERRNO (result, err) == ENOSYS)
__have_atfcts = -1;
else
# endif
if (!__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1))
return __xstat32_conv (vers, &st64, st);
else
{
__set_errno (INTERNAL_SYSCALL_ERRNO (result, err));
return -1;
}
}
#endif
#ifndef __ASSUME_ATFCTS
if (__glibc_unlikely (flag & ~AT_SYMLINK_NOFOLLOW))
{
__set_errno (EINVAL);
__set_errno (INTERNAL_SYSCALL_ERRNO (result, err));
return -1;
}
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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;
}
if (vers == _STAT_VER_KERNEL)
{
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (lstat, err, 2, file,
(struct kernel_stat *) st);
else
result = INTERNAL_SYSCALL (stat, err, 2, file,
(struct kernel_stat *) st);
goto out;
}
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (lstat64, err, 2, file, &st64);
else
result = INTERNAL_SYSCALL (stat64, err, 2, file, &st64);
if (__glibc_likely (!INTERNAL_SYSCALL_ERROR_P (result, err)))
return __xstat32_conv (vers, &st64, st);
out:
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err)))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf);
result = -1;
}
return result;
#endif
}
libc_hidden_def (__fxstatat)
#ifdef XSTAT_IS_XSTAT64

87
sysdeps/unix/sysv/linux/linkat.c
View File

@ -21,9 +21,10 @@
#include <stdio.h>
#include <sysdep.h>
#include <unistd.h>
#include <kernel-features.h>
/* Consider moving to syscalls.list. */
/* Make a link to FROM named TO but relative paths in TO and FROM are
interpreted relative to FROMFD and TOFD respectively. */
int
@ -34,87 +35,5 @@ linkat (fromfd, from, tofd, to, flags)
const char *to;
int flags;
{
int result;
#ifdef __NR_linkat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
result = INLINE_SYSCALL (linkat, 5, fromfd, from, tofd, to, flags);
# ifndef __ASSUME_ATFCTS
if (result == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return result;
}
#endif
#ifndef __ASSUME_ATFCTS
/* Without kernel support we cannot handle AT_SYMLINK_FOLLOW. */
if (flags != 0)
{
__set_errno (EINVAL);
return -1;
}
static const char procfd[] = "/proc/self/fd/%d/%s";
char *buffrom = NULL;
if (fromfd != AT_FDCWD && from[0] != '/')
{
size_t filelen = strlen (from);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
/* 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);
result = INTERNAL_SYSCALL (link, err, 2, from, to);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err)))
{
__atfct_seterrno_2 (INTERNAL_SYSCALL_ERRNO (result, err), tofd, bufto,
fromfd, buffrom);
result = -1;
}
return result;
#endif
return INLINE_SYSCALL (linkat, 5, fromfd, from, tofd, to, flags);
}

1
sysdeps/unix/sysv/linux/m68k/fchownat.c
View File

@ -1 +0,0 @@
#include <sysdeps/unix/sysv/linux/i386/fchownat.c>

64
sysdeps/unix/sysv/linux/mips/mips64/fxstatat64.c
View File

@ -26,8 +26,6 @@
#include <sysdep.h>
#include <sys/syscall.h>
#include <kernel-features.h>
#include <xstatconv.h>
/* Get information about the file NAME in BUF. */
@ -45,65 +43,13 @@ __fxstatat64 (int vers, int fd, const char *file, struct stat64 *st, int flag)
INTERNAL_SYSCALL_DECL (err);
struct kernel_stat kst;
#ifdef __NR_newfstatat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
result = INTERNAL_SYSCALL (newfstatat, err, 4, fd, file, &kst, flag);
if (!__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1))
return __xstat64_conv (vers, &kst, st);
else
{
result = INTERNAL_SYSCALL (newfstatat, err, 4, fd, file, &kst, flag);
# ifndef __ASSUME_ATFCTS
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1)
&& INTERNAL_SYSCALL_ERRNO (result, err) == ENOSYS)
__have_atfcts = -1;
else
# endif
if (!__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 1))
return __xstat64_conv (vers, &kst, st);
else
{
__set_errno (INTERNAL_SYSCALL_ERRNO (result, err));
return -1;
}
}
#endif
#ifndef __ASSUME_ATFCTS
if (flag & ~AT_SYMLINK_NOFOLLOW)
{
__set_errno (EINVAL);
__set_errno (INTERNAL_SYSCALL_ERRNO (result, err));
return -1;
}
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;
}
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (lstat, err, 2, file, &kst);
else
result = INTERNAL_SYSCALL (stat, err, 2, file, &kst);
if (__builtin_expect (!INTERNAL_SYSCALL_ERROR_P (result, err), 1))
return __xstat64_conv (vers, &kst, st);
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf);
return -1;
#endif
}
libc_hidden_def (__fxstatat64)

59
sysdeps/unix/sysv/linux/mkdirat.c
View File

@ -21,10 +21,11 @@
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <kernel-features.h>
#include <sysdep-cancel.h>
/* Consider moving to syscalls.list. */
/* Create a new directory with permission bits MODE. But interpret
relative PATH names relative to the directory associated with FD. */
int
@ -33,59 +34,5 @@ mkdirat (fd, file, mode)
const char *file;
mode_t mode;
{
int res;
#ifdef __NR_mkdirat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
res = INLINE_SYSCALL (mkdirat, 3, fd, file, mode);
# ifndef __ASSUME_ATFCTS
if (res == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return res;
}
#endif
#ifndef __ASSUME_ATFCTS
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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;
}
INTERNAL_SYSCALL_DECL (err);
res = INTERNAL_SYSCALL (mkdir, err, 2, file, mode);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (res, err)))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (res, err), fd, buf);
res = -1;
}
return res;
#endif
return INLINE_SYSCALL (mkdirat, 3, fd, file, mode);
}

92
sysdeps/unix/sysv/linux/openat.c
View File

@ -22,46 +22,12 @@
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <kernel-features.h>
#include <sysdep-cancel.h>
#include <not-cancel.h>
#ifndef OPENAT
# define OPENAT openat
# ifndef __ASSUME_ATFCTS
/* Set errno after a failed call. If BUF is not null,
it is a /proc/self/fd/ path name we just tried to use. */
void
attribute_hidden
__atfct_seterrno (int errval, int fd, const char *buf)
{
if (buf != NULL)
{
struct stat64 st;
if (errval == ENOTDIR || errval == ENOENT)
{
/* This can mean either the file descriptor is invalid or
/proc is not mounted. */
if (__fxstat64 (_STAT_VER, fd, &st) != 0)
/* errno is already set correctly. */
return;
/* If /proc is not mounted there is nothing we can do. */
if ((errval != ENOTDIR || S_ISDIR (st.st_mode))
&& (__xstat64 (_STAT_VER, "/proc/self/fd", &st) != 0
|| !S_ISDIR (st.st_mode)))
errval = ENOSYS;
}
}
__set_errno (errval);
}
int __have_atfcts;
# endif
#endif
@ -83,63 +49,7 @@ OPENAT_NOT_CANCEL (fd, file, oflag, mode)
oflag |= MORE_OFLAGS;
#endif
int res;
#ifdef __NR_openat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
res = INLINE_SYSCALL (openat, 4, fd, file, oflag, mode);
# ifndef __ASSUME_ATFCTS
if (res == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return res;
}
#endif
#ifndef __ASSUME_ATFCTS
INTERNAL_SYSCALL_DECL (err);
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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);
/* Note: snprintf cannot be canceled. */
__snprintf (buf, buflen, procfd, fd, file);
file = buf;
}
res = INTERNAL_SYSCALL (open, err, 3, file, oflag, mode);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (res, err)))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (res, err), fd, buf);
res = -1;
}
return res;
#endif
return INLINE_SYSCALL (openat, 4, fd, file, oflag, mode);
}
#define UNDERIZE(name) UNDERIZE_1 (name)

105
sysdeps/unix/sysv/linux/powerpc/fchownat.c
View File

@ -1,105 +0,0 @@
/* Copyright (C) 2005-2014 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, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <sysdep.h>
#include <stdlib.h>
#include <kernel-features.h>
/*
In Linux 2.1.x the chown functions have been changed. A new function lchown
was introduced. The new chown now follows symlinks - the old chown and the
new lchown do not follow symlinks.
This file emulates chown() under the old kernels.
*/
int
fchownat (int fd, const char *file, uid_t owner, gid_t group, int flag)
{
int result;
#ifdef __NR_fchownat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
result = INLINE_SYSCALL (fchownat, 5, fd, file, owner, group, flag);
# ifndef __ASSUME_ATFCTS
if (result == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return result;
}
#endif
#ifndef __ASSUME_ATFCTS
if (flag & ~AT_SYMLINK_NOFOLLOW)
{
__set_errno (EINVAL);
return -1;
}
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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;
}
INTERNAL_SYSCALL_DECL (err);
if (flag & AT_SYMLINK_NOFOLLOW)
result = INTERNAL_SYSCALL (lchown, err, 3, file, owner, group);
else
result = INTERNAL_SYSCALL (chown, err, 3, file, owner, group);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err)))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf);
return -1;
}
return result;
#endif
}

60
sysdeps/unix/sysv/linux/readlinkat.c
View File

@ -23,9 +23,10 @@
#include <string.h>
#include <sysdep.h>
#include <unistd.h>
#include <kernel-features.h>
/* Consider moving to syscalls.list. */
/* Read the contents of the symbolic link PATH relative to FD into no
more than LEN bytes of BUF. */
ssize_t
@ -35,61 +36,6 @@ readlinkat (fd, path, buf, len)
char *buf;
size_t len;
{
int result;
#ifdef __NR_readlinkat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
result = INLINE_SYSCALL (readlinkat, 4, fd, path, buf, len);
# ifndef __ASSUME_ATFCTS
if (result == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return result;
}
#endif
#ifndef __ASSUME_ATFCTS
char *pathbuf = NULL;
if (fd != AT_FDCWD && path[0] != '/')
{
size_t pathlen = strlen (path);
if (__glibc_unlikely (pathlen == 0))
{
__set_errno (ENOENT);
return -1;
}
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);
result = INTERNAL_SYSCALL (readlink, err, 3, path, buf, len);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err)))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, pathbuf);
result = -1;
}
return result;
#endif
return INLINE_SYSCALL (readlinkat, 4, fd, path, buf, len);
}
libc_hidden_def (readlinkat)

163
sysdeps/unix/sysv/linux/renameat.c
View File

@ -19,88 +19,10 @@
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <kernel-features.h>
#include <sysdep.h>
#ifndef __ASSUME_ATFCTS
void
attribute_hidden
__atfct_seterrno_2 (int errval, int fd1, const char *buf1, int fd2,
const char *buf2)
{
if (buf1 != NULL || buf2 != NULL)
{
struct stat64 st;
if (errval == ENOTDIR)
{
/* This can mean either the file descriptor is invalid or
/proc is not mounted. */
if (buf1 != NULL)
{
if (__fxstat64 (_STAT_VER, fd1, &st) != 0)
/* errno is already set correctly. */
return;
/* If /proc is not mounted there is nothing we can do. */
if (S_ISDIR (st.st_mode)
&& (__xstat64 (_STAT_VER, "/proc/self/fd", &st) != 0
|| !S_ISDIR (st.st_mode)))
{
errval = ENOSYS;
goto out;
}
}
if (buf2 != NULL)
{
if (__fxstat64 (_STAT_VER, fd2, &st) != 0)
/* errno is already set correctly. */
return;
/* If /proc is not mounted there is nothing we can do. */
if (S_ISDIR (st.st_mode)
&& (__xstat64 (_STAT_VER, "/proc/self/fd", &st) != 0
|| !S_ISDIR (st.st_mode)))
errval = ENOSYS;
}
}
else if (errval == ENOENT)
{
/* This could mean the file descriptor is not valid. We
reuse BUF for the stat call. Find the slash after the
file descriptor number. */
if (buf1 != NULL)
{
*(char *) strchr (buf1 + sizeof "/proc/self/fd", '/') = '\0';
int e = __lxstat64 (_STAT_VER, buf1, &st);
if ((e == -1 && errno == ENOENT)
||(e == 0 && !S_ISLNK (st.st_mode)))
{
errval = EBADF;
goto out;
}
}
if (buf2 != NULL)
{
*(char *) strchr (buf2 + sizeof "/proc/self/fd", '/') = '\0';
int e = __lxstat64 (_STAT_VER, buf2, &st);
if ((e == -1 && errno == ENOENT)
||(e == 0 && !S_ISLNK (st.st_mode)))
errval = EBADF;
}
}
}
out:
__set_errno (errval);
}
#endif
/* Consider moving to syscalls.list. */
/* Rename the file OLD relative to OLDFD to NEW relative to NEWFD. */
int
@ -110,86 +32,5 @@ renameat (oldfd, old, newfd, new)
int newfd;
const char *new;
{
int result;
#ifdef __NR_renameat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
result = INLINE_SYSCALL (renameat, 4, oldfd, old, newfd, new);
# ifndef __ASSUME_ATFCTS
if (result == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return result;
}
#endif
#ifndef __ASSUME_ATFCTS
static const char procfd[] = "/proc/self/fd/%d/%s";
char *bufold = NULL;
if (oldfd != AT_FDCWD && old[0] != '/')
{
size_t filelen = strlen (old);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
/* 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;
bufold = alloca (buflen);
__snprintf (bufold, buflen, procfd, oldfd, old);
old = bufold;
}
char *bufnew = NULL;
if (newfd != AT_FDCWD && new[0] != '/')
{
size_t filelen = strlen (new);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
/* 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;
bufnew = alloca (buflen);
__snprintf (bufnew, buflen, procfd, newfd, new);
new = bufnew;
}
INTERNAL_SYSCALL_DECL (err);
result = INTERNAL_SYSCALL (rename, err, 2, old, new);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err)))
{
__atfct_seterrno_2 (INTERNAL_SYSCALL_ERRNO (result, err), newfd, bufnew,
oldfd, bufold);
result = -1;
}
return result;
#endif
return INLINE_SYSCALL (renameat, 4, oldfd, old, newfd, new);
}

1
sysdeps/unix/sysv/linux/s390/s390-32/fchownat.c
View File

@ -1 +0,0 @@
#include <sysdeps/unix/sysv/linux/i386/fchownat.c>

1
sysdeps/unix/sysv/linux/sh/fchownat.c
View File

@ -1 +0,0 @@
#include <sysdeps/unix/sysv/linux/i386/fchownat.c>

1
sysdeps/unix/sysv/linux/sparc/sparc32/fchownat.c
View File

@ -1 +0,0 @@
#include <sysdeps/unix/sysv/linux/i386/fchownat.c>

5
sysdeps/unix/sysv/linux/sparc/sparc64/dl-fxstatat64.c
View File

@ -1,6 +1 @@
/* In this implementation we do not really care whether the call fails
because of missing kernel support since we do not even call the
function in this case. */
#undef __ASSUME_ATFCTS
#define __ASSUME_ATFCTS 1
#include "fxstatat.c"

60
sysdeps/unix/sysv/linux/symlinkat.c
View File

@ -23,9 +23,10 @@
#include <string.h>
#include <sysdep.h>
#include <unistd.h>
#include <kernel-features.h>
/* Consider moving to syscalls.list. */
/* Make a symbolic link to FROM named TO relative to TOFD. */
int
symlinkat (from, tofd, to)
@ -33,60 +34,5 @@ symlinkat (from, tofd, to)
int tofd;
const char *to;
{
int result;
#ifdef __NR_symlinkat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
result = INLINE_SYSCALL (symlinkat, 3, from, tofd, to);
# ifndef __ASSUME_ATFCTS
if (result == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return result;
}
#endif
#ifndef __ASSUME_ATFCTS
char *buf = NULL;
if (tofd != AT_FDCWD && to[0] != '/')
{
size_t tolen = strlen (to);
if (__glibc_unlikely (tolen == 0))
{
__set_errno (ENOENT);
return -1;
}
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);
result = INTERNAL_SYSCALL (symlink, err, 2, from, to);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err)))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), tofd, buf);
result = -1;
}
return result;
#endif
return INLINE_SYSCALL (symlinkat, 3, from, tofd, to);
}

69
sysdeps/unix/sysv/linux/unlinkat.c
View File

@ -24,9 +24,10 @@
#include <string.h>
#include <sysdep.h>
#include <unistd.h>
#include <kernel-features.h>
/* Consider moving to syscalls.list. */
/* Remove the link named NAME. */
int
unlinkat (fd, file, flag)
@ -34,69 +35,5 @@ unlinkat (fd, file, flag)
const char *file;
int flag;
{
int result;
#ifdef __NR_unlinkat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
result = INLINE_SYSCALL (unlinkat, 3, fd, file, flag);
# ifndef __ASSUME_ATFCTS
if (result == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return result;
}
#endif
#ifndef __ASSUME_ATFCTS
if (flag & ~AT_REMOVEDIR)
{
__set_errno (EINVAL);
return -1;
}
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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;
}
INTERNAL_SYSCALL_DECL (err);
if (flag & AT_REMOVEDIR)
result = INTERNAL_SYSCALL (rmdir, err, 1, file);
else
result = INTERNAL_SYSCALL (unlink, err, 1, file);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (result, err)))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf);
result = -1;
}
return result;
#endif
return INLINE_SYSCALL (unlinkat, 3, fd, file, flag);
}

5
sysdeps/unix/sysv/linux/wordsize-64/dl-fxstatat64.c
View File

@ -1,6 +1 @@
/* In this implementation we do not really care whether the call fails
because of missing kernel support since we do not even call the
function in this case. */
#undef __ASSUME_ATFCTS
#define __ASSUME_ATFCTS 1
#include "fxstatat.c"

67
sysdeps/unix/sysv/linux/wordsize-64/fxstatat.c
View File

@ -27,7 +27,6 @@
#include <sys/stat.h>
#include <sysdep.h>
#include <kernel-features.h>
#include <sys/syscall.h>
@ -41,71 +40,7 @@ __fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
return -1;
}
int res;
#ifdef __NR_newfstatat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
res = INLINE_SYSCALL (newfstatat, 4, fd, file, st, flag);
# ifndef __ASSUME_ATFCTS
if (res == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return res;
}
#endif
#ifndef __ASSUME_ATFCTS
if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
{
__set_errno (EINVAL);
return -1;
}
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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;
}
INTERNAL_SYSCALL_DECL (err);
if (flag & AT_SYMLINK_NOFOLLOW)
res = INTERNAL_SYSCALL (lstat, err, 2, file, st);
else
res = INTERNAL_SYSCALL (stat, err, 2, file, st);
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (res, err)))
{
__atfct_seterrno (INTERNAL_SYSCALL_ERRNO (res, err), fd, buf);
res = -1;
}
return res;
#endif
return INLINE_SYSCALL (newfstatat, 4, fd, file, st, flag);
}
libc_hidden_def (__fxstatat)
#undef __fxstatat64

47
sysdeps/unix/sysv/linux/xmknodat.c
View File

@ -24,7 +24,6 @@
#include <sys/sysmacros.h>
#include <sysdep.h>
#include <kernel-features.h>
#include <sys/syscall.h>
@ -48,51 +47,7 @@ __xmknodat (int vers, int fd, const char *file, mode_t mode, dev_t *dev)
return -1;
}
#ifdef __NR_mknodat
# ifndef __ASSUME_ATFCTS
if (__have_atfcts >= 0)
# endif
{
int res = INLINE_SYSCALL (mknodat, 4, fd, file, mode,
(unsigned int) k_dev);
# ifndef __ASSUME_ATFCTS
if (res == -1 && errno == ENOSYS)
__have_atfcts = -1;
else
# endif
return res;
}
#endif
#ifndef __ASSUME_ATFCTS
char *buf = NULL;
if (fd != AT_FDCWD && file[0] != '/')
{
size_t filelen = strlen (file);
if (__glibc_unlikely (filelen == 0))
{
__set_errno (ENOENT);
return -1;
}
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;
}
return INLINE_SYSCALL (mknod, 3, file, mode, (unsigned int) k_dev);
#endif
return INLINE_SYSCALL (mknodat, 4, fd, file, mode, (unsigned int) k_dev);
}
libc_hidden_def (__xmknodat)