glibc/io/sys/stat.h

/* Copyright (C) 1991, 1992, 1995, 1996 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

/*
 *	POSIX Standard: 5.6 File Characteristics	<sys/stat.h>
 */

#ifndef	_SYS_STAT_H

#define	_SYS_STAT_H	1
#include <features.h>

#include <gnu/types.h>		/* For __mode_t and __dev_t.  */

__BEGIN_DECLS

#include <statbuf.h>

#if defined(__USE_BSD) || defined(__USE_MISC)
#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_IFLNK
#define	S_IFLNK		__S_IFLNK
#endif
#ifdef __S_IFSOCK
#define	S_IFSOCK	__S_IFSOCK
#endif
#ifdef __S_IFIFO
#define	S_IFIFO		__S_IFIFO
#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	__USE_BSD
#ifdef __S_IFLNK
#define	S_ISLNK(mode)	__S_ISTYPE((mode), __S_IFLNK)
#endif
#ifdef __S_IFSOCK
#define	S_ISSOCK(mode)	__S_ISTYPE((mode), __S_IFSOCK)
#endif
#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)
/* 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_ISTXT|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


/* Get file attributes for FILE and put them in BUF.  */
extern int __stat __P ((__const char *__file, struct stat *__buf));
extern int stat __P ((__const char *__file, struct stat *__buf));

/* 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 __P ((int __fd, struct stat *__buf));
extern int fstat __P ((int __fd, struct stat *__buf));

/* Get file attributes about FILE and put them in BUF.
   If FILE is a symbolic link, do not follow it.  */
extern int __lstat __P ((__const char *__file, struct stat *__buf));
#ifdef	__USE_BSD
extern int lstat __P ((__const char *__file, struct stat *__buf));
#endif

/* Set file access permissions for FILE to MODE.
   This takes an `int' MODE argument because that
   is what `mode_t's get widened to.  */
extern int __chmod __P ((__const char *__file, __mode_t __mode));
extern int chmod __P ((__const char *__file, __mode_t __mode));

/* Set file access permissions of the file FD is open on to MODE.  */
extern int __fchmod __P ((int __fd, __mode_t __mode));
#ifdef	__USE_BSD
extern int fchmod __P ((int __fd, __mode_t __mode));
#endif


/* Set the file creation mask of the current process to MASK,
   and return the old creation mask.  */
extern __mode_t __umask __P ((__mode_t __mask));
extern __mode_t umask __P ((__mode_t __mask));

#ifdef	__USE_GNU
/* Get the current `umask' value without changing it.
   This function is only available under the GNU Hurd.  */
extern __mode_t getumask __P ((void));
#endif

/* Create a new directory named PATH, with permission bits MODE.  */
extern int __mkdir __P ((__const char *__path, __mode_t __mode));
extern int mkdir __P ((__const char *__path, __mode_t __mode));

/* 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).  */
extern int __mknod __P ((__const char *__path,
			 __mode_t __mode, __dev_t __dev));
#if	defined(__USE_MISC) || defined(__USE_BSD)
extern int mknod __P ((__const char *__path,
		       __mode_t __mode, __dev_t __dev));
#endif


/* Create a new FIFO named PATH, with permission bits MODE.  */
extern int mkfifo __P ((__const char *__path, __mode_t __mode));

/* 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.
   <statbuf.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.  */
extern int __fxstat __P ((int __ver, int __fildes,
			  struct stat *__stat_buf));
extern int __xstat __P ((int __ver, __const char *__filename,
			 struct stat *__stat_buf));
extern int __lxstat __P ((int __ver, __const char *__filename,
			  struct stat *__stat_buf));
extern int __xmknod __P ((int __ver, __const char *__path,
			  __mode_t __mode, __dev_t *__dev));

#if defined (__GNUC__) && __GNUC__ >= 2
/* Inlined versions of the real stat and mknod functions.  */

extern __inline__ int __stat (__const char *__path, struct stat *__statbuf)
{ return __xstat (_STAT_VER, __path, __statbuf); }
extern __inline__ int stat (__const char *__path, struct stat *__statbuf)
{ return __xstat (_STAT_VER, __path, __statbuf); }

extern __inline__ int __lstat(__const char *__path, struct stat *__statbuf)
{ return __lxstat (_STAT_VER, __path, __statbuf); }
extern __inline__ int lstat(__const char *__path, struct stat *__statbuf)
{ return __lxstat (_STAT_VER, __path, __statbuf); }

extern __inline__ int __fstat (int __fd, struct stat *__statbuf)
{ return __fxstat (_STAT_VER, __fd, __statbuf); }
extern __inline__ int fstat (int __fd, struct stat *__statbuf)
{ return __fxstat (_STAT_VER, __fd, __statbuf); }

extern __inline__ int __mknod (__const char *__path, __mode_t __mode,
			       __dev_t __dev)
{ return __xmknod (_MKNOD_VER, __path, __mode, &__dev); }
#if	defined(__USE_MISC) || defined(__USE_BSD)
extern __inline__ int mknod (__const char *__path, __mode_t __mode,
			     __dev_t __dev)
{ return __xmknod (_MKNOD_VER, __path, __mode, &__dev); }
#endif

#endif

__END_DECLS


#endif /* sys/stat.h  */