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File Name : fcntl.h

/* 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)
#define O_TMPFILE_MASK (__O_TMPFILE | O_DIRECTORY | O_CREAT)

#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 CONFIG_64BIT
#ifndef F_GETLK64
#define F_GETLK64	12	/*  using 'struct flock64' */
#define F_SETLK64	13
#define F_SETLKW64	14
#endif
#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 */

#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
#ifndef __ARCH_FLOCK_PAD
#define __ARCH_FLOCK_PAD
#endif

struct flock {
	short	l_type;
	short	l_whence;
	__kernel_off_t	l_start;
	__kernel_off_t	l_len;
	__kernel_pid_t	l_pid;
	__ARCH_FLOCK_PAD
};
#endif

#ifndef HAVE_ARCH_STRUCT_FLOCK64
#ifndef __ARCH_FLOCK64_PAD
#define __ARCH_FLOCK64_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;
	__ARCH_FLOCK64_PAD
};
#endif

#endif /* _ASM_GENERIC_FCNTL_H */

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.	dir	-	root/root	0755	2026-07-16 05:18:37
..	dir	-	root/root	0755	2026-07-23 05:24:18
auxvec.h	text/x-c	218 B	root/root	0644	2026-07-08 04:23:01
bitsperlong.h	text/x-c	564 B	root/root	0644	2026-07-08 04:23:01
bpf_perf_event.h	text/x-c	238 B	root/root	0644	2026-07-08 04:23:01
errno-base.h	text/x-c	1.57 KB	root/root	0644	2026-07-08 04:23:01
errno.h	text/x-c	5.52 KB	root/root	0644	2026-07-08 04:23:01
fcntl.h	text/x-c	5.3 KB	root/root	0644	2026-07-08 04:23:01
hugetlb_encode.h	text/x-c	1.76 KB	root/root	0644	2026-07-08 04:23:01
int-l64.h	text/x-c	718 B	root/root	0644	2026-07-08 04:23:01
int-ll64.h	text/x-c	864 B	root/root	0644	2026-07-08 04:23:01
ioctl.h	text/x-c	3.4 KB	root/root	0644	2026-07-08 04:23:01
ioctls.h	text/x-c	3.89 KB	root/root	0644	2026-07-08 04:23:01
ipcbuf.h	text/x-c	1003 B	root/root	0644	2026-07-08 04:23:01
kvm_para.h	text/plain	96 B	root/root	0644	2026-07-08 04:23:01
mman-common.h	text/x-c	3.46 KB	root/root	0644	2026-07-08 04:23:01
mman.h	text/x-c	740 B	root/root	0644	2026-07-08 04:23:01
msgbuf.h	text/x-c	1.58 KB	root/root	0644	2026-07-08 04:23:01
param.h	text/x-c	353 B	root/root	0644	2026-07-08 04:23:01
poll.h	text/x-c	878 B	root/root	0644	2026-07-08 04:23:01
posix_types.h	text/x-c	2.32 KB	root/root	0644	2026-07-08 04:23:01
resource.h	text/x-c	1.83 KB	root/root	0644	2026-07-08 04:23:01
sembuf.h	text/x-c	1.51 KB	root/root	0644	2026-07-08 04:23:01
setup.h	text/x-c	190 B	root/root	0644	2026-07-08 04:23:01
shmbuf.h	text/x-c	1.79 KB	root/root	0644	2026-07-08 04:23:01
shmparam.h	text/x-c	231 B	root/root	0644	2026-07-08 04:23:01
siginfo.h	text/x-c	12.21 KB	root/root	0644	2026-07-08 04:23:01
signal-defs.h	text/x-c	800 B	root/root	0644	2026-07-08 04:23:01
signal.h	text/x-c	2.65 KB	root/root	0644	2026-07-08 04:23:01
socket.h	text/x-c	2.42 KB	root/root	0644	2026-07-08 04:23:01
sockios.h	text/x-c	439 B	root/root	0644	2026-07-08 04:23:01
stat.h	text/x-c	2.57 KB	root/root	0644	2026-07-08 04:23:01
statfs.h	text/x-c	1.8 KB	root/root	0644	2026-07-08 04:23:01
swab.h	text/x-c	502 B	root/root	0644	2026-07-08 04:23:01
termbits.h	text/x-c	4.61 KB	root/root	0644	2026-07-08 04:23:01
termios.h	text/x-c	1.34 KB	root/root	0644	2026-07-08 04:23:01
types.h	text/x-c	233 B	root/root	0644	2026-07-08 04:23:01
ucontext.h	text/x-c	357 B	root/root	0644	2026-07-08 04:23:01
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