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fcntl.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef _ASM_GENERIC_FCNTL_H #define _ASM_GENERIC_FCNTL_H #include <linux/types.h> /* * FMODE_EXEC is 0x20 * FMODE_NONOTIFY is 0x4000000 * These cannot be used by userspace O_* until internal and external open * flags are split. * -Eric Paris */ /* * When introducing new O_* bits, please check its uniqueness in fcntl_init(). */ #define O_ACCMODE 00000003 #define O_RDONLY 00000000 #define O_WRONLY 00000001 #define O_RDWR 00000002 #ifndef O_CREAT #define O_CREAT 00000100 /* not fcntl */ #endif #ifndef O_EXCL #define O_EXCL 00000200 /* not fcntl */ #endif #ifndef O_NOCTTY #define O_NOCTTY 00000400 /* not fcntl */ #endif #ifndef O_TRUNC #define O_TRUNC 00001000 /* not fcntl */ #endif #ifndef O_APPEND #define O_APPEND 00002000 #endif #ifndef O_NONBLOCK #define O_NONBLOCK 00004000 #endif #ifndef O_DSYNC #define O_DSYNC 00010000 /* used to be O_SYNC, see below */ #endif #ifndef FASYNC #define FASYNC 00020000 /* fcntl, for BSD compatibility */ #endif #ifndef O_DIRECT #define O_DIRECT 00040000 /* direct disk access hint */ #endif #ifndef O_LARGEFILE #define O_LARGEFILE 00100000 #endif #ifndef O_DIRECTORY #define O_DIRECTORY 00200000 /* must be a directory */ #endif #ifndef O_NOFOLLOW #define O_NOFOLLOW 00400000 /* don't follow links */ #endif #ifndef O_NOATIME #define O_NOATIME 01000000 #endif #ifndef O_CLOEXEC #define O_CLOEXEC 02000000 /* set close_on_exec */ #endif /* * Before Linux 2.6.33 only O_DSYNC semantics were implemented, but using * the O_SYNC flag. We continue to use the existing numerical value * for O_DSYNC semantics now, but using the correct symbolic name for it. * This new value is used to request true Posix O_SYNC semantics. It is * defined in this strange way to make sure applications compiled against * new headers get at least O_DSYNC semantics on older kernels. * * This has the nice side-effect that we can simply test for O_DSYNC * wherever we do not care if O_DSYNC or O_SYNC is used. * * Note: __O_SYNC must never be used directly. */ #ifndef O_SYNC #define __O_SYNC 04000000 #define O_SYNC (__O_SYNC|O_DSYNC) #endif #ifndef O_PATH #define O_PATH 010000000 #endif #ifndef __O_TMPFILE #define __O_TMPFILE 020000000 #endif /* a horrid kludge trying to make sure that this will fail on old kernels */ #define O_TMPFILE (__O_TMPFILE | O_DIRECTORY) #ifndef O_NDELAY #define O_NDELAY O_NONBLOCK #endif #define F_DUPFD 0 /* dup */ #define F_GETFD 1 /* get close_on_exec */ #define F_SETFD 2 /* set/clear close_on_exec */ #define F_GETFL 3 /* get file->f_flags */ #define F_SETFL 4 /* set file->f_flags */ #ifndef F_GETLK #define F_GETLK 5 #define F_SETLK 6 #define F_SETLKW 7 #endif #ifndef F_SETOWN #define F_SETOWN 8 /* for sockets. */ #define F_GETOWN 9 /* for sockets. */ #endif #ifndef F_SETSIG #define F_SETSIG 10 /* for sockets. */ #define F_GETSIG 11 /* for sockets. */ #endif #ifndef F_GETLK64 #define F_GETLK64 12 /* using 'struct flock64' */ #define F_SETLK64 13 #define F_SETLKW64 14 #endif #ifndef F_SETOWN_EX #define F_SETOWN_EX 15 #define F_GETOWN_EX 16 #endif #ifndef F_GETOWNER_UIDS #define F_GETOWNER_UIDS 17 #endif /* * Open File Description Locks * * Usually record locks held by a process are released on *any* close and are * not inherited across a fork(). * * These cmd values will set locks that conflict with process-associated * record locks, but are "owned" by the open file description, not the * process. This means that they are inherited across fork() like BSD (flock) * locks, and they are only released automatically when the last reference to * the the open file against which they were acquired is put. */ #define F_OFD_GETLK 36 #define F_OFD_SETLK 37 #define F_OFD_SETLKW 38 #define F_OWNER_TID 0 #define F_OWNER_PID 1 #define F_OWNER_PGRP 2 struct f_owner_ex { int type; __kernel_pid_t pid; }; /* for F_[GET|SET]FL */ #define FD_CLOEXEC 1 /* actually anything with low bit set goes */ /* for posix fcntl() and lockf() */ #ifndef F_RDLCK #define F_RDLCK 0 #define F_WRLCK 1 #define F_UNLCK 2 #endif /* for old implementation of bsd flock () */ #ifndef F_EXLCK #define F_EXLCK 4 /* or 3 */ #define F_SHLCK 8 /* or 4 */ #endif /* operations for bsd flock(), also used by the kernel implementation */ #define LOCK_SH 1 /* shared lock */ #define LOCK_EX 2 /* exclusive lock */ #define LOCK_NB 4 /* or'd with one of the above to prevent blocking */ #define LOCK_UN 8 /* remove lock */ /* * LOCK_MAND support has been removed from the kernel. We leave the symbols * here to not break legacy builds, but these should not be used in new code. */ #define LOCK_MAND 32 /* This is a mandatory flock ... */ #define LOCK_READ 64 /* which allows concurrent read operations */ #define LOCK_WRITE 128 /* which allows concurrent write operations */ #define LOCK_RW 192 /* which allows concurrent read & write ops */ #define F_LINUX_SPECIFIC_BASE 1024 #ifndef HAVE_ARCH_STRUCT_FLOCK struct flock { short l_type; short l_whence; __kernel_off_t l_start; __kernel_off_t l_len; __kernel_pid_t l_pid; #ifdef __ARCH_FLOCK_EXTRA_SYSID __ARCH_FLOCK_EXTRA_SYSID #endif #ifdef __ARCH_FLOCK_PAD __ARCH_FLOCK_PAD #endif }; struct flock64 { short l_type; short l_whence; __kernel_loff_t l_start; __kernel_loff_t l_len; __kernel_pid_t l_pid; #ifdef __ARCH_FLOCK64_PAD __ARCH_FLOCK64_PAD #endif }; #endif /* HAVE_ARCH_STRUCT_FLOCK */ #endif /* _ASM_GENERIC_FCNTL_H */