mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 14:30:06 +00:00
d15b99ac5a
* posix/unistd.h [__USE_ATFILE]: Declare faccessat. * io/faccessat.c: New file. * sysdeps/unix/sysv/linux/faccessat.c: New file. * io/Makefile (routines): Add faccessat. * io/Versions (libc: GLIBC_2.4): Likewise. * io/tst-faccessat.c: New file. * io/Makefile (tests): Add it. * io/sys/stat.h: Likewise.
519 lines
16 KiB
C
519 lines
16 KiB
C
/* Copyright (C) 1991,1992,1995-2004,2005,2006 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. */
|
||
|
||
/*
|
||
* POSIX Standard: 5.6 File Characteristics <sys/stat.h>
|
||
*/
|
||
|
||
#ifndef _SYS_STAT_H
|
||
#define _SYS_STAT_H 1
|
||
|
||
#include <features.h>
|
||
|
||
#include <bits/types.h> /* For __mode_t and __dev_t. */
|
||
|
||
#if defined __USE_XOPEN || defined __USE_MISC
|
||
# if defined __USE_XOPEN || defined __USE_XOPEN2K
|
||
# define __need_time_t
|
||
# endif
|
||
# ifdef __USE_MISC
|
||
# define __need_timespec
|
||
# endif
|
||
# include <time.h> /* For time_t resp. timespec. */
|
||
#endif
|
||
|
||
#if defined __USE_XOPEN || defined __USE_XOPEN2K
|
||
/* The Single Unix specification says that some more types are
|
||
available here. */
|
||
# ifndef __dev_t_defined
|
||
typedef __dev_t dev_t;
|
||
# define __dev_t_defined
|
||
# endif
|
||
|
||
# ifndef __gid_t_defined
|
||
typedef __gid_t gid_t;
|
||
# define __gid_t_defined
|
||
# endif
|
||
|
||
# ifndef __ino_t_defined
|
||
# ifndef __USE_FILE_OFFSET64
|
||
typedef __ino_t ino_t;
|
||
# else
|
||
typedef __ino64_t ino_t;
|
||
# endif
|
||
# define __ino_t_defined
|
||
# endif
|
||
|
||
# ifndef __mode_t_defined
|
||
typedef __mode_t mode_t;
|
||
# define __mode_t_defined
|
||
# endif
|
||
|
||
# ifndef __nlink_t_defined
|
||
typedef __nlink_t nlink_t;
|
||
# define __nlink_t_defined
|
||
# endif
|
||
|
||
# ifndef __off_t_defined
|
||
# ifndef __USE_FILE_OFFSET64
|
||
typedef __off_t off_t;
|
||
# else
|
||
typedef __off64_t off_t;
|
||
# endif
|
||
# define __off_t_defined
|
||
# endif
|
||
|
||
# ifndef __uid_t_defined
|
||
typedef __uid_t uid_t;
|
||
# define __uid_t_defined
|
||
# endif
|
||
#endif /* X/Open */
|
||
|
||
#ifdef __USE_UNIX98
|
||
# ifndef __blkcnt_t_defined
|
||
# ifndef __USE_FILE_OFFSET64
|
||
typedef __blkcnt_t blkcnt_t;
|
||
# else
|
||
typedef __blkcnt64_t blkcnt_t;
|
||
# endif
|
||
# define __blkcnt_t_defined
|
||
# endif
|
||
|
||
# ifndef __blksize_t_defined
|
||
typedef __blksize_t blksize_t;
|
||
# define __blksize_t_defined
|
||
# endif
|
||
#endif /* Unix98 */
|
||
|
||
__BEGIN_DECLS
|
||
|
||
#include <bits/stat.h>
|
||
|
||
#if defined __USE_BSD || defined __USE_MISC || defined __USE_XOPEN
|
||
# define S_IFMT __S_IFMT
|
||
# define S_IFDIR __S_IFDIR
|
||
# define S_IFCHR __S_IFCHR
|
||
# define S_IFBLK __S_IFBLK
|
||
# define S_IFREG __S_IFREG
|
||
# ifdef __S_IFIFO
|
||
# define S_IFIFO __S_IFIFO
|
||
# endif
|
||
# ifdef __S_IFLNK
|
||
# define S_IFLNK __S_IFLNK
|
||
# endif
|
||
# if (defined __USE_BSD || defined __USE_MISC || defined __USE_UNIX98) \
|
||
&& defined __S_IFSOCK
|
||
# define S_IFSOCK __S_IFSOCK
|
||
# endif
|
||
#endif
|
||
|
||
/* Test macros for file types. */
|
||
|
||
#define __S_ISTYPE(mode, mask) (((mode) & __S_IFMT) == (mask))
|
||
|
||
#define S_ISDIR(mode) __S_ISTYPE((mode), __S_IFDIR)
|
||
#define S_ISCHR(mode) __S_ISTYPE((mode), __S_IFCHR)
|
||
#define S_ISBLK(mode) __S_ISTYPE((mode), __S_IFBLK)
|
||
#define S_ISREG(mode) __S_ISTYPE((mode), __S_IFREG)
|
||
#ifdef __S_IFIFO
|
||
# define S_ISFIFO(mode) __S_ISTYPE((mode), __S_IFIFO)
|
||
#endif
|
||
#ifdef __S_IFLNK
|
||
# define S_ISLNK(mode) __S_ISTYPE((mode), __S_IFLNK)
|
||
#endif
|
||
|
||
#if defined __USE_BSD && !defined __S_IFLNK
|
||
# define S_ISLNK(mode) 0
|
||
#endif
|
||
|
||
#if (defined __USE_BSD || defined __USE_UNIX98) \
|
||
&& defined __S_IFSOCK
|
||
# define S_ISSOCK(mode) __S_ISTYPE((mode), __S_IFSOCK)
|
||
#endif
|
||
|
||
/* These are from POSIX.1b. If the objects are not implemented using separate
|
||
distinct file types, the macros always will evaluate to zero. Unlike the
|
||
other S_* macros the following three take a pointer to a `struct stat'
|
||
object as the argument. */
|
||
#ifdef __USE_POSIX199309
|
||
# define S_TYPEISMQ(buf) __S_TYPEISMQ(buf)
|
||
# define S_TYPEISSEM(buf) __S_TYPEISSEM(buf)
|
||
# define S_TYPEISSHM(buf) __S_TYPEISSHM(buf)
|
||
#endif
|
||
|
||
|
||
/* Protection bits. */
|
||
|
||
#define S_ISUID __S_ISUID /* Set user ID on execution. */
|
||
#define S_ISGID __S_ISGID /* Set group ID on execution. */
|
||
|
||
#if defined __USE_BSD || defined __USE_MISC || defined __USE_XOPEN
|
||
/* Save swapped text after use (sticky bit). This is pretty well obsolete. */
|
||
# define S_ISVTX __S_ISVTX
|
||
#endif
|
||
|
||
#define S_IRUSR __S_IREAD /* Read by owner. */
|
||
#define S_IWUSR __S_IWRITE /* Write by owner. */
|
||
#define S_IXUSR __S_IEXEC /* Execute by owner. */
|
||
/* Read, write, and execute by owner. */
|
||
#define S_IRWXU (__S_IREAD|__S_IWRITE|__S_IEXEC)
|
||
|
||
#if defined __USE_MISC && defined __USE_BSD
|
||
# define S_IREAD S_IRUSR
|
||
# define S_IWRITE S_IWUSR
|
||
# define S_IEXEC S_IXUSR
|
||
#endif
|
||
|
||
#define S_IRGRP (S_IRUSR >> 3) /* Read by group. */
|
||
#define S_IWGRP (S_IWUSR >> 3) /* Write by group. */
|
||
#define S_IXGRP (S_IXUSR >> 3) /* Execute by group. */
|
||
/* Read, write, and execute by group. */
|
||
#define S_IRWXG (S_IRWXU >> 3)
|
||
|
||
#define S_IROTH (S_IRGRP >> 3) /* Read by others. */
|
||
#define S_IWOTH (S_IWGRP >> 3) /* Write by others. */
|
||
#define S_IXOTH (S_IXGRP >> 3) /* Execute by others. */
|
||
/* Read, write, and execute by others. */
|
||
#define S_IRWXO (S_IRWXG >> 3)
|
||
|
||
|
||
#ifdef __USE_BSD
|
||
/* Macros for common mode bit masks. */
|
||
# define ACCESSPERMS (S_IRWXU|S_IRWXG|S_IRWXO) /* 0777 */
|
||
# define ALLPERMS (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)/* 07777 */
|
||
# define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)/* 0666*/
|
||
|
||
# define S_BLKSIZE 512 /* Block size for `st_blocks'. */
|
||
#endif
|
||
|
||
|
||
#ifndef __USE_FILE_OFFSET64
|
||
/* Get file attributes for FILE and put them in BUF. */
|
||
extern int stat (__const char *__restrict __file,
|
||
struct stat *__restrict __buf) __THROW __nonnull ((1, 2));
|
||
|
||
/* Get file attributes for the file, device, pipe, or socket
|
||
that file descriptor FD is open on and put them in BUF. */
|
||
extern int fstat (int __fd, struct stat *__buf) __THROW __nonnull ((2));
|
||
#else
|
||
# ifdef __REDIRECT_NTH
|
||
extern int __REDIRECT_NTH (stat, (__const char *__restrict __file,
|
||
struct stat *__restrict __buf), stat64)
|
||
__nonnull ((1, 2));
|
||
extern int __REDIRECT_NTH (fstat, (int __fd, struct stat *__buf), fstat64)
|
||
__nonnull ((2));
|
||
# else
|
||
# define stat stat64
|
||
# define fstat fstat64
|
||
# endif
|
||
#endif
|
||
#ifdef __USE_LARGEFILE64
|
||
extern int stat64 (__const char *__restrict __file,
|
||
struct stat64 *__restrict __buf) __THROW __nonnull ((1, 2));
|
||
extern int fstat64 (int __fd, struct stat64 *__buf) __THROW __nonnull ((2));
|
||
#endif
|
||
|
||
#ifdef __USE_ATFILE
|
||
/* Similar to stat, get the attributes for FILE and put them in BUF.
|
||
Relative path names are interpreted relative to FD unless FD is
|
||
AT_FDCWD. */
|
||
# ifndef __USE_FILE_OFFSET64
|
||
extern int fstatat (int __fd, __const char *__restrict __file,
|
||
struct stat *__restrict __buf, int __flag)
|
||
__THROW __nonnull ((2, 3));
|
||
# else
|
||
# ifdef __REDIRECT_NTH
|
||
extern int __REDIRECT_NTH (fstatat, (int __fd, __const char *__restrict __file,
|
||
struct stat *__restrict __buf,
|
||
int __flag),
|
||
fstatat64) __nonnull ((2, 3));
|
||
# else
|
||
# define fstatat fstatat64
|
||
# endif
|
||
# endif
|
||
|
||
extern int fstatat64 (int __fd, __const char *__restrict __file,
|
||
struct stat64 *__restrict __buf, int __flag)
|
||
__THROW __nonnull ((2, 3));
|
||
#endif
|
||
|
||
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
|
||
# ifndef __USE_FILE_OFFSET64
|
||
/* Get file attributes about FILE and put them in BUF.
|
||
If FILE is a symbolic link, do not follow it. */
|
||
extern int lstat (__const char *__restrict __file,
|
||
struct stat *__restrict __buf) __THROW __nonnull ((1, 2));
|
||
# else
|
||
# ifdef __REDIRECT_NTH
|
||
extern int __REDIRECT_NTH (lstat,
|
||
(__const char *__restrict __file,
|
||
struct stat *__restrict __buf), lstat64)
|
||
__nonnull ((1, 2));
|
||
# else
|
||
# define lstat lstat64
|
||
# endif
|
||
# endif
|
||
# ifdef __USE_LARGEFILE64
|
||
extern int lstat64 (__const char *__restrict __file,
|
||
struct stat64 *__restrict __buf)
|
||
__THROW __nonnull ((1, 2));
|
||
# endif
|
||
#endif
|
||
|
||
/* Set file access permissions for FILE to MODE.
|
||
If FILE is a symbolic link, this affects its target instead. */
|
||
extern int chmod (__const char *__file, __mode_t __mode)
|
||
__THROW __nonnull ((1));
|
||
|
||
#ifdef __USE_BSD
|
||
/* Set file access permissions for FILE to MODE.
|
||
If FILE is a symbolic link, this affects the link itself
|
||
rather than its target. */
|
||
extern int lchmod (__const char *__file, __mode_t __mode)
|
||
__THROW __nonnull ((1));
|
||
#endif
|
||
|
||
/* Set file access permissions of the file FD is open on to MODE. */
|
||
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
|
||
extern int fchmod (int __fd, __mode_t __mode) __THROW;
|
||
#endif
|
||
|
||
#ifdef __USE_ATFILE
|
||
/* Set file access permissions of FILE relative to
|
||
the directory FD is open on. */
|
||
extern int fchmodat (int __fd, __const char *__file, __mode_t mode, int __flag)
|
||
__THROW __nonnull ((2)) __wur;
|
||
#endif /* Use ATFILE. */
|
||
|
||
|
||
|
||
/* Set the file creation mask of the current process to MASK,
|
||
and return the old creation mask. */
|
||
extern __mode_t umask (__mode_t __mask) __THROW;
|
||
|
||
#ifdef __USE_GNU
|
||
/* Get the current `umask' value without changing it.
|
||
This function is only available under the GNU Hurd. */
|
||
extern __mode_t getumask (void) __THROW;
|
||
#endif
|
||
|
||
/* Create a new directory named PATH, with permission bits MODE. */
|
||
extern int mkdir (__const char *__path, __mode_t __mode)
|
||
__THROW __nonnull ((1));
|
||
|
||
#ifdef __USE_ATFILE
|
||
/* Like mkdir, create a new directory with permission bits MODE. But
|
||
interpret relative PATH names relative to the directory associated
|
||
with FD. */
|
||
extern int mkdirat (int __fd, __const char *__path, __mode_t __mode)
|
||
__THROW __nonnull ((2));
|
||
#endif
|
||
|
||
/* Create a device file named PATH, with permission and special bits MODE
|
||
and device number DEV (which can be constructed from major and minor
|
||
device numbers with the `makedev' macro above). */
|
||
#if defined __USE_MISC || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
|
||
extern int mknod (__const char *__path, __mode_t __mode, __dev_t __dev)
|
||
__THROW __nonnull ((1));
|
||
#endif
|
||
|
||
#ifdef __USE_ATFILE
|
||
/* Like mknod, create a new device file with permission bits MODE and
|
||
device number DEV. But interpret relative PATH names relative to
|
||
the directory associated with FD. */
|
||
extern int mknodat (int __fd, __const char *__path, __mode_t __mode,
|
||
__dev_t __dev) __THROW __nonnull ((2));
|
||
#endif
|
||
|
||
|
||
/* Create a new FIFO named PATH, with permission bits MODE. */
|
||
extern int mkfifo (__const char *__path, __mode_t __mode)
|
||
__THROW __nonnull ((1));
|
||
|
||
#ifdef __USE_ATFILE
|
||
/* Like mkfifo, create a new FIFO with permission bits MODE. But
|
||
interpret relative PATH names relative to the directory associated
|
||
with FD. */
|
||
extern int mkfifoat (int __fd, __const char *__path, __mode_t __mode)
|
||
__THROW __nonnull ((2));
|
||
#endif
|
||
|
||
/* To allow the `struct stat' structure and the file type `mode_t'
|
||
bits to vary without changing shared library major version number,
|
||
the `stat' family of functions and `mknod' are in fact inline
|
||
wrappers around calls to `xstat', `fxstat', `lxstat', and `xmknod',
|
||
which all take a leading version-number argument designating the
|
||
data structure and bits used. <bits/stat.h> defines _STAT_VER with
|
||
the version number corresponding to `struct stat' as defined in
|
||
that file; and _MKNOD_VER with the version number corresponding to
|
||
the S_IF* macros defined therein. It is arranged that when not
|
||
inlined these function are always statically linked; that way a
|
||
dynamically-linked executable always encodes the version number
|
||
corresponding to the data structures it uses, so the `x' functions
|
||
in the shared library can adapt without needing to recompile all
|
||
callers. */
|
||
|
||
#ifndef _STAT_VER
|
||
# define _STAT_VER 0
|
||
#endif
|
||
#ifndef _MKNOD_VER
|
||
# define _MKNOD_VER 0
|
||
#endif
|
||
|
||
/* Wrappers for stat and mknod system calls. */
|
||
#ifndef __USE_FILE_OFFSET64
|
||
extern int __fxstat (int __ver, int __fildes, struct stat *__stat_buf)
|
||
__THROW __nonnull ((3));
|
||
extern int __xstat (int __ver, __const char *__filename,
|
||
struct stat *__stat_buf) __THROW __nonnull ((2, 3));
|
||
extern int __lxstat (int __ver, __const char *__filename,
|
||
struct stat *__stat_buf) __THROW __nonnull ((2, 3));
|
||
extern int __fxstatat (int __ver, int __fildes, __const char *__filename,
|
||
struct stat *__stat_buf, int __flag)
|
||
__THROW __nonnull ((3, 4));
|
||
#else
|
||
# ifdef __REDIRECT_NTH
|
||
extern int __REDIRECT_NTH (__fxstat, (int __ver, int __fildes,
|
||
struct stat *__stat_buf), __fxstat64)
|
||
__nonnull ((3));
|
||
extern int __REDIRECT_NTH (__xstat, (int __ver, __const char *__filename,
|
||
struct stat *__stat_buf), __xstat64)
|
||
__nonnull ((2, 3));
|
||
extern int __REDIRECT_NTH (__lxstat, (int __ver, __const char *__filename,
|
||
struct stat *__stat_buf), __lxstat64)
|
||
__nonnull ((2, 3));
|
||
extern int __REDIRECT_NTH (__fxstatat, (int __ver, int __fildes,
|
||
__const char *__filename,
|
||
struct stat *__stat_buf, int __flag),
|
||
__fxstatat64) __nonnull ((3, 4));
|
||
|
||
# else
|
||
# define __fxstat __fxstat64
|
||
# define __xstat __xstat64
|
||
# define __lxstat __lxstat64
|
||
# endif
|
||
#endif
|
||
|
||
#ifdef __USE_LARGEFILE64
|
||
extern int __fxstat64 (int __ver, int __fildes, struct stat64 *__stat_buf)
|
||
__THROW __nonnull ((3));
|
||
extern int __xstat64 (int __ver, __const char *__filename,
|
||
struct stat64 *__stat_buf) __THROW __nonnull ((2, 3));
|
||
extern int __lxstat64 (int __ver, __const char *__filename,
|
||
struct stat64 *__stat_buf) __THROW __nonnull ((2, 3));
|
||
extern int __fxstatat64 (int __ver, int __fildes, __const char *__filename,
|
||
struct stat64 *__stat_buf, int __flag)
|
||
__THROW __nonnull ((3, 4));
|
||
#endif
|
||
extern int __xmknod (int __ver, __const char *__path, __mode_t __mode,
|
||
__dev_t *__dev) __THROW __nonnull ((2, 4));
|
||
|
||
extern int __xmknodat (int __ver, int __fd, __const char *__path,
|
||
__mode_t __mode, __dev_t *__dev)
|
||
__THROW __nonnull ((3, 5));
|
||
|
||
#if defined __GNUC__ && __GNUC__ >= 2
|
||
/* Inlined versions of the real stat and mknod functions. */
|
||
|
||
extern __inline__ int
|
||
__NTH (stat (__const char *__path, struct stat *__statbuf))
|
||
{
|
||
return __xstat (_STAT_VER, __path, __statbuf);
|
||
}
|
||
|
||
# if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
|
||
extern __inline__ int
|
||
__NTH (lstat (__const char *__path, struct stat *__statbuf))
|
||
{
|
||
return __lxstat (_STAT_VER, __path, __statbuf);
|
||
}
|
||
# endif
|
||
|
||
extern __inline__ int
|
||
__NTH (fstat (int __fd, struct stat *__statbuf))
|
||
{
|
||
return __fxstat (_STAT_VER, __fd, __statbuf);
|
||
}
|
||
|
||
# ifdef __USE_ATFILE
|
||
extern __inline__ int
|
||
__NTH (fstatat (int __fd, __const char *__filename, struct stat *__statbuf,
|
||
int __flag))
|
||
{
|
||
return __fxstatat (_STAT_VER, __fd, __filename, __statbuf, __flag);
|
||
}
|
||
# endif
|
||
|
||
# if defined __USE_MISC || defined __USE_BSD
|
||
extern __inline__ int
|
||
__NTH (mknod (__const char *__path, __mode_t __mode, __dev_t __dev))
|
||
{
|
||
return __xmknod (_MKNOD_VER, __path, __mode, &__dev);
|
||
}
|
||
# endif
|
||
|
||
# ifdef __USE_ATFILE
|
||
extern __inline__ int
|
||
__NTH (mknodat (int __fd, __const char *__path, __mode_t __mode,
|
||
__dev_t __dev))
|
||
{
|
||
return __xmknodat (_MKNOD_VER, __fd, __path, __mode, &__dev);
|
||
}
|
||
# endif
|
||
|
||
# if defined __USE_LARGEFILE64 \
|
||
&& (! defined __USE_FILE_OFFSET64 \
|
||
|| (defined __REDIRECT_NTH && defined __OPTIMIZE__))
|
||
extern __inline__ int
|
||
__NTH (stat64 (__const char *__path, struct stat64 *__statbuf))
|
||
{
|
||
return __xstat64 (_STAT_VER, __path, __statbuf);
|
||
}
|
||
|
||
# if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
|
||
extern __inline__ int
|
||
__NTH (lstat64 (__const char *__path, struct stat64 *__statbuf))
|
||
{
|
||
return __lxstat64 (_STAT_VER, __path, __statbuf);
|
||
}
|
||
# endif
|
||
|
||
extern __inline__ int
|
||
__NTH (fstat64 (int __fd, struct stat64 *__statbuf))
|
||
{
|
||
return __fxstat64 (_STAT_VER, __fd, __statbuf);
|
||
}
|
||
|
||
# ifdef __USE_GNU
|
||
extern __inline__ int
|
||
__NTH (fstatat64 (int __fd, __const char *__filename, struct stat64 *__statbuf,
|
||
int __flag))
|
||
{
|
||
return __fxstatat64 (_STAT_VER, __fd, __filename, __statbuf, __flag);
|
||
}
|
||
# endif
|
||
|
||
# endif
|
||
|
||
#endif
|
||
|
||
__END_DECLS
|
||
|
||
|
||
#endif /* sys/stat.h */
|