The C and C++ Include Header Files

/usr/include/linux/fcntl.h


$ cat -n /usr/include/linux/fcntl.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef _LINUX_FCNTL_H
     3	#define _LINUX_FCNTL_H
     4	
     5	#include <asm/fcntl.h>
     6	#include <linux/openat2.h>
     7	
     8	#define F_SETLEASE	(F_LINUX_SPECIFIC_BASE + 0)
     9	#define F_GETLEASE	(F_LINUX_SPECIFIC_BASE + 1)
    10	
    11	/*
    12	 * Cancel a blocking posix lock; internal use only until we expose an
    13	 * asynchronous lock api to userspace:
    14	 */
    15	#define F_CANCELLK	(F_LINUX_SPECIFIC_BASE + 5)
    16	
    17	/* Create a file descriptor with FD_CLOEXEC set. */
    18	#define F_DUPFD_CLOEXEC	(F_LINUX_SPECIFIC_BASE + 6)
    19	
    20	/*
    21	 * Request nofications on a directory.
    22	 * See below for events that may be notified.
    23	 */
    24	#define F_NOTIFY	(F_LINUX_SPECIFIC_BASE+2)
    25	
    26	/*
    27	 * Set and get of pipe page size array
    28	 */
    29	#define F_SETPIPE_SZ	(F_LINUX_SPECIFIC_BASE + 7)
    30	#define F_GETPIPE_SZ	(F_LINUX_SPECIFIC_BASE + 8)
    31	
    32	/*
    33	 * Set/Get seals
    34	 */
    35	#define F_ADD_SEALS	(F_LINUX_SPECIFIC_BASE + 9)
    36	#define F_GET_SEALS	(F_LINUX_SPECIFIC_BASE + 10)
    37	
    38	/*
    39	 * Types of seals
    40	 */
    41	#define F_SEAL_SEAL	0x0001	/* prevent further seals from being set */
    42	#define F_SEAL_SHRINK	0x0002	/* prevent file from shrinking */
    43	#define F_SEAL_GROW	0x0004	/* prevent file from growing */
    44	#define F_SEAL_WRITE	0x0008	/* prevent writes */
    45	#define F_SEAL_FUTURE_WRITE	0x0010  /* prevent future writes while mapped */
    46	#define F_SEAL_EXEC	0x0020  /* prevent chmod modifying exec bits */
    47	/* (1U << 31) is reserved for signed error codes */
    48	
    49	/*
    50	 * Set/Get write life time hints. {GET,SET}_RW_HINT operate on the
    51	 * underlying inode, while {GET,SET}_FILE_RW_HINT operate only on
    52	 * the specific file.
    53	 */
    54	#define F_GET_RW_HINT		(F_LINUX_SPECIFIC_BASE + 11)
    55	#define F_SET_RW_HINT		(F_LINUX_SPECIFIC_BASE + 12)
    56	#define F_GET_FILE_RW_HINT	(F_LINUX_SPECIFIC_BASE + 13)
    57	#define F_SET_FILE_RW_HINT	(F_LINUX_SPECIFIC_BASE + 14)
    58	
    59	/*
    60	 * Valid hint values for F_{GET,SET}_RW_HINT. 0 is "not set", or can be
    61	 * used to clear any hints previously set.
    62	 */
    63	#define RWH_WRITE_LIFE_NOT_SET	0
    64	#define RWH_WRITE_LIFE_NONE	1
    65	#define RWH_WRITE_LIFE_SHORT	2
    66	#define RWH_WRITE_LIFE_MEDIUM	3
    67	#define RWH_WRITE_LIFE_LONG	4
    68	#define RWH_WRITE_LIFE_EXTREME	5
    69	
    70	/*
    71	 * The originally introduced spelling is remained from the first
    72	 * versions of the patch set that introduced the feature, see commit
    73	 * v4.13-rc1~212^2~51.
    74	 */
    75	#define RWF_WRITE_LIFE_NOT_SET	RWH_WRITE_LIFE_NOT_SET
    76	
    77	/*
    78	 * Types of directory notifications that may be requested.
    79	 */
    80	#define DN_ACCESS	0x00000001	/* File accessed */
    81	#define DN_MODIFY	0x00000002	/* File modified */
    82	#define DN_CREATE	0x00000004	/* File created */
    83	#define DN_DELETE	0x00000008	/* File removed */
    84	#define DN_RENAME	0x00000010	/* File renamed */
    85	#define DN_ATTRIB	0x00000020	/* File changed attibutes */
    86	#define DN_MULTISHOT	0x80000000	/* Don't remove notifier */
    87	
    88	/*
    89	 * The constants AT_REMOVEDIR and AT_EACCESS have the same value.  AT_EACCESS is
    90	 * meaningful only to faccessat, while AT_REMOVEDIR is meaningful only to
    91	 * unlinkat.  The two functions do completely different things and therefore,
    92	 * the flags can be allowed to overlap.  For example, passing AT_REMOVEDIR to
    93	 * faccessat would be undefined behavior and thus treating it equivalent to
    94	 * AT_EACCESS is valid undefined behavior.
    95	 */
    96	#define AT_FDCWD		-100    /* Special value used to indicate
    97	                                           openat should use the current
    98	                                           working directory. */
    99	#define AT_SYMLINK_NOFOLLOW	0x100   /* Do not follow symbolic links.  */
   100	#define AT_EACCESS		0x200	/* Test access permitted for
   101	                                           effective IDs, not real IDs.  */
   102	#define AT_REMOVEDIR		0x200   /* Remove directory instead of
   103	                                           unlinking file.  */
   104	#define AT_SYMLINK_FOLLOW	0x400   /* Follow symbolic links.  */
   105	#define AT_NO_AUTOMOUNT		0x800	/* Suppress terminal automount traversal */
   106	#define AT_EMPTY_PATH		0x1000	/* Allow empty relative pathname */
   107	
   108	#define AT_STATX_SYNC_TYPE	0x6000	/* Type of synchronisation required from statx() */
   109	#define AT_STATX_SYNC_AS_STAT	0x0000	/* - Do whatever stat() does */
   110	#define AT_STATX_FORCE_SYNC	0x2000	/* - Force the attributes to be sync'd with the server */
   111	#define AT_STATX_DONT_SYNC	0x4000	/* - Don't sync attributes with the server */
   112	
   113	#define AT_RECURSIVE		0x8000	/* Apply to the entire subtree */
   114	
   115	/* Flags for name_to_handle_at(2). We reuse AT_ flag space to save bits... */
   116	#define AT_HANDLE_FID		AT_REMOVEDIR	/* file handle is needed to
   117						compare object identity and may not
   118						be usable to open_by_handle_at(2) */
   119	
   120	#endif /* _LINUX_FCNTL_H */