-/* Copyright (C) 1991,92,94,95,96,97,98,99,2000,2001 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2022 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.
+ 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
- Library General Public License for more details.
+ Lesser 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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
/*
* POSIX Standard: 6.5 File Control Operations <fcntl.h>
/* This must be early so <bits/fcntl.h> can define types winningly. */
__BEGIN_DECLS
+/* Get __mode_t, __dev_t and __off_t .*/
+#include <bits/types.h>
+
/* Get the definitions of O_*, F_*, FD_*: all the
numbers and flag bits for `open', `fcntl', et al. */
#include <bits/fcntl.h>
+/* Detect if open needs mode as a third argument (or for openat as a fourth
+ argument). */
+#ifdef __O_TMPFILE
+# define __OPEN_NEEDS_MODE(oflag) \
+ (((oflag) & O_CREAT) != 0 || ((oflag) & __O_TMPFILE) == __O_TMPFILE)
+#else
+# define __OPEN_NEEDS_MODE(oflag) (((oflag) & O_CREAT) != 0)
+#endif
+
+/* POSIX.1-2001 specifies that these types are defined by <fcntl.h>.
+ Earlier POSIX standards permitted any type ending in `_t' to be defined
+ by any POSIX header, so we don't conditionalize the definitions here. */
+#ifndef __mode_t_defined
+typedef __mode_t mode_t;
+# define __mode_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
+
+#if defined __USE_LARGEFILE64 && !defined __off64_t_defined
+typedef __off64_t off64_t;
+# define __off64_t_defined
+#endif
+
+#ifndef __pid_t_defined
+typedef __pid_t pid_t;
+# define __pid_t_defined
+#endif
+
/* For XPG all symbols from <sys/stat.h> should also be available. */
-#ifdef __USE_XOPEN
-# include <sys/stat.h>
+#ifdef __USE_XOPEN2K8
+# include <bits/types/struct_timespec.h>
+#endif
+#if defined __USE_XOPEN || defined __USE_XOPEN2K8
+# include <bits/stat.h>
+
+# 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_UNIX98 || defined __USE_XOPEN2K8) && defined __S_IFSOCK
+# define S_IFSOCK __S_IFSOCK
+# 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_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)
+
+# 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)
#endif
#ifdef __USE_MISC
# endif
#endif /* Use misc. */
-/* XPG wants the following symbols. */
-#ifdef __USE_XOPEN /* <stdio.h> has the same definitions. */
+/* XPG wants the following symbols. <stdio.h> has the same definitions. */
+#if defined __USE_XOPEN || defined __USE_XOPEN2K8
# define SEEK_SET 0 /* Seek from beginning of file. */
# define SEEK_CUR 1 /* Seek from current position. */
# define SEEK_END 2 /* Seek from end of file. */
#endif /* XPG */
+/* The constants AT_REMOVEDIR and AT_EACCESS have the same value. AT_EACCESS
+ is meaningful only to faccessat, while AT_REMOVEDIR is meaningful only to
+ unlinkat. The two functions do completely different things and therefore,
+ the flags can be allowed to overlap. For example, passing AT_REMOVEDIR to
+ faccessat would be undefined behavior and thus treating it equivalent to
+ AT_EACCESS is valid undefined behavior. */
+#ifdef __USE_ATFILE
+# define AT_FDCWD -100 /* Special value used to indicate
+ the *at functions should use the
+ current working directory. */
+# define AT_SYMLINK_NOFOLLOW 0x100 /* Do not follow symbolic links. */
+# define AT_REMOVEDIR 0x200 /* Remove directory instead of
+ unlinking file. */
+# define AT_SYMLINK_FOLLOW 0x400 /* Follow symbolic links. */
+# ifdef __USE_GNU
+# define AT_NO_AUTOMOUNT 0x800 /* Suppress terminal automount
+ traversal. */
+# define AT_EMPTY_PATH 0x1000 /* Allow empty relative pathname. */
+# define AT_STATX_SYNC_TYPE 0x6000
+# define AT_STATX_SYNC_AS_STAT 0x0000
+# define AT_STATX_FORCE_SYNC 0x2000
+# define AT_STATX_DONT_SYNC 0x4000
+# define AT_RECURSIVE 0x8000 /* Apply to the entire subtree. */
+# endif
+# define AT_EACCESS 0x200 /* Test access permitted for
+ effective IDs, not real IDs. */
+#endif
+
/* Do the file control operation described by CMD on FD.
- The remaining arguments are interpreted depending on CMD. */
-extern int fcntl (int __fd, int __cmd, ...) __THROW;
+ The remaining arguments are interpreted depending on CMD.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+#ifndef __USE_TIME_BITS64
+# ifndef __USE_FILE_OFFSET64
+extern int fcntl (int __fd, int __cmd, ...);
+# else
+# ifdef __REDIRECT
+extern int __REDIRECT (fcntl, (int __fd, int __cmd, ...), fcntl64);
+# else
+# define fcntl fcntl64
+# endif
+# endif
+# ifdef __USE_LARGEFILE64
+extern int fcntl64 (int __fd, int __cmd, ...);
+# endif
+#else /* __USE_TIME_BITS64 */
+# ifdef __REDIRECT
+extern int __REDIRECT_NTH (fcntl, (int __fd, int __request, ...),
+ __fcntl_time64);
+extern int __REDIRECT_NTH (fcntl64, (int __fd, int __request, ...),
+ __fcntl_time64);
+# else
+extern int __fcntl_time64 (int __fd, int __request, ...) __THROW;
+# define fcntl64 __fcntl_time64
+# define fcntl __fcntl_time64
+# endif
+#endif
/* Open FILE and return a new file descriptor for it, or -1 on error.
- OFLAG determines the type of access used. If O_CREAT is on OFLAG,
- the third argument is taken as a `mode_t', the mode of the created file. */
+ OFLAG determines the type of access used. If O_CREAT or O_TMPFILE is set
+ in OFLAG, the third argument is taken as a `mode_t', the mode of the
+ created file.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
#ifndef __USE_FILE_OFFSET64
-extern int open (__const char *__file, int __oflag, ...) __THROW;
+extern int open (const char *__file, int __oflag, ...) __nonnull ((1));
#else
# ifdef __REDIRECT
-extern int __REDIRECT (open, (__const char *__file, int __oflag, ...) __THROW,
- open64);
+extern int __REDIRECT (open, (const char *__file, int __oflag, ...), open64)
+ __nonnull ((1));
# else
# define open open64
# endif
#endif
#ifdef __USE_LARGEFILE64
-extern int open64 (__const char *__file, int __oflag, ...) __THROW;
+extern int open64 (const char *__file, int __oflag, ...) __nonnull ((1));
+#endif
+
+#ifdef __USE_ATFILE
+/* Similar to `open' but a relative path name is interpreted relative to
+ the directory for which FD is a descriptor.
+
+ NOTE: some other `openat' implementation support additional functionality
+ through this interface, especially using the O_XATTR flag. This is not
+ yet supported here.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
+# ifndef __USE_FILE_OFFSET64
+extern int openat (int __fd, const char *__file, int __oflag, ...)
+ __nonnull ((2));
+# else
+# ifdef __REDIRECT
+extern int __REDIRECT (openat, (int __fd, const char *__file, int __oflag,
+ ...), openat64) __nonnull ((2));
+# else
+# define openat openat64
+# endif
+# endif
+# ifdef __USE_LARGEFILE64
+extern int openat64 (int __fd, const char *__file, int __oflag, ...)
+ __nonnull ((2));
+# endif
#endif
-/* Create and open FILE, with mode MODE.
- This takes an `int' MODE argument because that is
- what `mode_t' will be widened to. */
+/* Create and open FILE, with mode MODE. This takes an `int' MODE
+ argument because that is what `mode_t' will be widened to.
+
+ This function is a cancellation point and therefore not marked with
+ __THROW. */
#ifndef __USE_FILE_OFFSET64
-extern int creat (__const char *__file, __mode_t __mode) __THROW;
+extern int creat (const char *__file, mode_t __mode) __nonnull ((1));
#else
# ifdef __REDIRECT
-extern int __REDIRECT (creat, (__const char *__file, __mode_t __mode) __THROW,
- creat64);
+extern int __REDIRECT (creat, (const char *__file, mode_t __mode),
+ creat64) __nonnull ((1));
# else
# define creat creat64
# endif
#endif
#ifdef __USE_LARGEFILE64
-extern int creat64 (__const char *__file, __mode_t __mode) __THROW;
+extern int creat64 (const char *__file, mode_t __mode) __nonnull ((1));
#endif
#if !defined F_LOCK && (defined __USE_MISC || (defined __USE_XOPEN_EXTENDED \
# define F_TEST 3 /* Test a region for other processes locks. */
# ifndef __USE_FILE_OFFSET64
-extern int lockf (int __fd, int __cmd, __off_t __len) __THROW;
-# else
-# ifdef __REDIRECT
-extern int __REDIRECT (lockf, (int __fd, int __cmd, __off64_t __len) __THROW,
- lockf64);
+extern int lockf (int __fd, int __cmd, off_t __len);
# else
-# define lockf lockf64
-# endif
+# ifdef __REDIRECT
+extern int __REDIRECT (lockf, (int __fd, int __cmd, __off64_t __len), lockf64);
+# else
+# define lockf lockf64
+# endif
# endif
# ifdef __USE_LARGEFILE64
-extern int lockf64 (int __fd, int __cmd, __off64_t __len) __THROW;
+extern int lockf64 (int __fd, int __cmd, off64_t __len);
# endif
#endif
/* Advice the system about the expected behaviour of the application with
respect to the file associated with FD. */
# ifndef __USE_FILE_OFFSET64
-extern int posix_fadvise (int __fd, __off_t __offset, size_t __len,
+extern int posix_fadvise (int __fd, off_t __offset, off_t __len,
int __advise) __THROW;
# else
-# ifdef __REDIRECT
-extern int __REDIRECT (posix_fadvise, (int __fd, __off64_t __offset,
- size_t __len, int __advise) __THROW,
- posix_fadvise64);
-# else
-# define posix_fadvise posix_fadvise64
-# endif
+ # ifdef __REDIRECT_NTH
+extern int __REDIRECT_NTH (posix_fadvise, (int __fd, __off64_t __offset,
+ __off64_t __len, int __advise),
+ posix_fadvise64);
+# else
+# define posix_fadvise posix_fadvise64
+# endif
# endif
# ifdef __USE_LARGEFILE64
-extern int posix_fadvise64 (int __fd, __off64_t __offset, size_t __len,
+extern int posix_fadvise64 (int __fd, off64_t __offset, off64_t __len,
int __advise) __THROW;
# endif
-/* Reserve storage for the data of the file associated with FD. */
+/* Reserve storage for the data of the file associated with FD.
+
+ This function is a possible cancellation point and therefore not
+ marked with __THROW. */
# ifndef __USE_FILE_OFFSET64
-extern int posix_fallocate (int __fd, __off_t __offset, size_t __len) __THROW;
+extern int posix_fallocate (int __fd, off_t __offset, off_t __len);
# else
-# ifdef __REDIRECT
+ # ifdef __REDIRECT
extern int __REDIRECT (posix_fallocate, (int __fd, __off64_t __offset,
- size_t __len) __THROW,
+ __off64_t __len),
posix_fallocate64);
-# else
-# define posix_fallocate posix_fallocate64
-# endif
+# else
+# define posix_fallocate posix_fallocate64
+# endif
# endif
# ifdef __USE_LARGEFILE64
-extern int posix_fallocate64 (int __fd, __off64_t __offset, size_t __len)
- __THROW;
+extern int posix_fallocate64 (int __fd, off64_t __offset, off64_t __len);
# endif
#endif
+
+/* Define some inlines helping to catch common problems. */
+#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function \
+ && defined __va_arg_pack_len
+# include <bits/fcntl2.h>
+#endif
+
__END_DECLS
#endif /* fcntl.h */
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