| /* Copyright (C) 1991,1992,1994-2001,2003,2004,2005,2006,2007, 2009 |
| 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: 6.5 File Control Operations <fcntl.h> |
| */ |
| |
| #ifndef _FCNTL_H |
| #define _FCNTL_H 1 |
| |
| #include <features.h> |
| |
| /* This must be early so <bits/fcntl.h> can define types winningly. */ |
| __BEGIN_DECLS |
| |
| /* Get the definitions of O_*, F_*, FD_*: all the |
| numbers and flag bits for `open', `fcntl', et al. */ |
| #include <bits/fcntl.h> |
| |
| /* For XPG all symbols from <sys/stat.h> should also be available. */ |
| #ifdef __USE_XOPEN |
| # include <sys/stat.h> |
| #endif |
| |
| #ifdef __USE_MISC |
| # ifndef R_OK /* Verbatim from <unistd.h>. Ugh. */ |
| /* Values for the second argument to access. |
| These may be OR'd together. */ |
| # define R_OK 4 /* Test for read permission. */ |
| # define W_OK 2 /* Test for write permission. */ |
| # define X_OK 1 /* Test for execute permission. */ |
| # define F_OK 0 /* Test for existence. */ |
| # endif |
| #endif /* Use misc. */ |
| |
| /* XPG wants the following symbols. */ |
| #ifdef __USE_XOPEN /* <stdio.h> has the same definitions. */ |
| # 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 */ |
| |
| #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. */ |
| # 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. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| #if !defined(__USE_FILE_OFFSET64) || defined(__LP64__) |
| 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 |
| #if defined(__USE_LARGEFILE64) && !defined(__LP64__) |
| extern int fcntl64 (int __fd, int __cmd, ...); |
| #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. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| #ifndef __USE_FILE_OFFSET64 |
| extern int open (__const char *__file, int __oflag, ...) __nonnull ((1)); |
| #else |
| # ifdef __REDIRECT |
| 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, ...) __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 |
| |
| extern int openat64 (int __fd, __const char *__file, int __oflag, ...) |
| __nonnull ((2)); |
| #endif |
| |
| /* 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) __nonnull ((1)); |
| #else |
| # ifdef __REDIRECT |
| 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) __nonnull ((1)); |
| #endif |
| |
| #if !defined F_LOCK && (defined __USE_MISC || (defined __USE_XOPEN_EXTENDED \ |
| && !defined __USE_POSIX)) |
| /* NOTE: These declarations also appear in <unistd.h>; be sure to keep both |
| files consistent. Some systems have them there and some here, and some |
| software depends on the macros being defined without including both. */ |
| |
| /* `lockf' is a simpler interface to the locking facilities of `fcntl'. |
| LEN is always relative to the current file position. |
| The CMD argument is one of the following. */ |
| |
| # define F_ULOCK 0 /* Unlock a previously locked region. */ |
| # define F_LOCK 1 /* Lock a region for exclusive use. */ |
| # define F_TLOCK 2 /* Test and lock a region for exclusive use. */ |
| # 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); |
| # else |
| # 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); |
| # endif |
| #endif |
| |
| #if defined __USE_XOPEN2K && defined __UCLIBC_HAS_ADVANCED_REALTIME__ |
| /* 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, __off_t __len, |
| int __advise) __THROW; |
| # else |
| # 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, __off64_t __len, |
| int __advise) __THROW; |
| # endif |
| |
| #endif |
| |
| #if 0 /* && defined __UCLIBC_HAS_ADVANCED_REALTIME__ */ |
| |
| /* FIXME -- uClibc should probably implement these... */ |
| |
| /* Reserve storage for the data of the file associated with FD. |
| |
| This function is a possible cancellation points and therefore not |
| marked with __THROW. */ |
| # ifndef __USE_FILE_OFFSET64 |
| extern int posix_fallocate (int __fd, __off_t __offset, __off_t __len); |
| # else |
| # ifdef __REDIRECT |
| extern int __REDIRECT (posix_fallocate, (int __fd, __off64_t __offset, |
| __off64_t __len), |
| posix_fallocate64); |
| # else |
| # define posix_fallocate posix_fallocate64 |
| # endif |
| # endif |
| # ifdef __USE_LARGEFILE64 |
| extern int posix_fallocate64 (int __fd, __off64_t __offset, __off64_t __len); |
| # endif |
| #endif |
| |
| |
| __END_DECLS |
| |
| #endif /* fcntl.h */ |
