fcntl.h 8.5 KB

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  1. /* O_*, F_*, FD_* bit values for Linux/x86-64.
  2. Copyright (C) 2001, 2002, 2004, 2006 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #ifndef _FCNTL_H
  17. # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
  18. #endif
  19. #include <sys/types.h>
  20. #include <bits/wordsize.h>
  21. #ifdef __USE_GNU
  22. # include <bits/uio.h>
  23. #endif
  24. /* open/fcntl - O_SYNC is only implemented on blocks devices and on files
  25. located on an ext2 file system */
  26. #define O_ACCMODE 0003
  27. #define O_RDONLY 00
  28. #define O_WRONLY 01
  29. #define O_RDWR 02
  30. #define O_CREAT 0100 /* not fcntl */
  31. #define O_EXCL 0200 /* not fcntl */
  32. #define O_NOCTTY 0400 /* not fcntl */
  33. #define O_TRUNC 01000 /* not fcntl */
  34. #define O_APPEND 02000
  35. #define O_NONBLOCK 04000
  36. #define O_NDELAY O_NONBLOCK
  37. #define O_SYNC 010000
  38. #define O_FSYNC O_SYNC
  39. #define O_ASYNC 020000
  40. #ifdef __USE_GNU
  41. # define O_DIRECT 040000 /* Direct disk access. */
  42. # define O_DIRECTORY 0200000 /* Must be a directory. */
  43. # define O_NOFOLLOW 0400000 /* Do not follow links. */
  44. # define O_NOATIME 01000000 /* Do not set atime. */
  45. #endif
  46. /* For now Linux has synchronisity options for data and read operations.
  47. We define the symbols here but let them do the same as O_SYNC since
  48. this is a superset. */
  49. #if defined __USE_POSIX199309 || defined __USE_UNIX98
  50. # define O_DSYNC O_SYNC /* Synchronize data. */
  51. # define O_RSYNC O_SYNC /* Synchronize read operations. */
  52. #endif
  53. #ifdef __USE_LARGEFILE64
  54. # if __WORDSIZE == 64
  55. # define O_LARGEFILE 0
  56. # else
  57. # define O_LARGEFILE 0100000
  58. # endif
  59. #endif
  60. /* Values for the second argument to `fcntl'. */
  61. #define F_DUPFD 0 /* Duplicate file descriptor. */
  62. #define F_GETFD 1 /* Get file descriptor flags. */
  63. #define F_SETFD 2 /* Set file descriptor flags. */
  64. #define F_GETFL 3 /* Get file status flags. */
  65. #define F_SETFL 4 /* Set file status flags. */
  66. #if __WORDSIZE == 64
  67. # define F_GETLK 5 /* Get record locking info. */
  68. # define F_SETLK 6 /* Set record locking info (non-blocking). */
  69. # define F_SETLKW 7 /* Set record locking info (blocking). */
  70. /* Not necessary, we always have 64-bit offsets. */
  71. # define F_GETLK64 5 /* Get record locking info. */
  72. # define F_SETLK64 6 /* Set record locking info (non-blocking). */
  73. # define F_SETLKW64 7 /* Set record locking info (blocking). */
  74. #else
  75. # ifndef __USE_FILE_OFFSET64
  76. # define F_GETLK 5 /* Get record locking info. */
  77. # define F_SETLK 6 /* Set record locking info (non-blocking). */
  78. # define F_SETLKW 7 /* Set record locking info (blocking). */
  79. # else
  80. # define F_GETLK F_GETLK64 /* Get record locking info. */
  81. # define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/
  82. # define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */
  83. # endif
  84. # define F_GETLK64 12 /* Get record locking info. */
  85. # define F_SETLK64 13 /* Set record locking info (non-blocking). */
  86. # define F_SETLKW64 14 /* Set record locking info (blocking). */
  87. #endif
  88. #if defined __USE_BSD || defined __USE_UNIX98
  89. # define F_SETOWN 8 /* Get owner of socket (receiver of SIGIO). */
  90. # define F_GETOWN 9 /* Set owner of socket (receiver of SIGIO). */
  91. #endif
  92. #ifdef __USE_GNU
  93. # define F_SETSIG 10 /* Set number of signal to be sent. */
  94. # define F_GETSIG 11 /* Get number of signal to be sent. */
  95. #endif
  96. #ifdef __USE_GNU
  97. # define F_SETLEASE 1024 /* Set a lease. */
  98. # define F_GETLEASE 1025 /* Enquire what lease is active. */
  99. # define F_NOTIFY 1026 /* Request notfications on a directory. */
  100. #endif
  101. /* For F_[GET|SET]FL. */
  102. #define FD_CLOEXEC 1 /* actually anything with low bit set goes */
  103. /* For posix fcntl() and `l_type' field of a `struct flock' for lockf(). */
  104. #define F_RDLCK 0 /* Read lock. */
  105. #define F_WRLCK 1 /* Write lock. */
  106. #define F_UNLCK 2 /* Remove lock. */
  107. /* For old implementation of bsd flock(). */
  108. #define F_EXLCK 4 /* or 3 */
  109. #define F_SHLCK 8 /* or 4 */
  110. #ifdef __USE_BSD
  111. /* Operations for bsd flock(), also used by the kernel implementation. */
  112. # define LOCK_SH 1 /* shared lock */
  113. # define LOCK_EX 2 /* exclusive lock */
  114. # define LOCK_NB 4 /* or'd with one of the above to prevent
  115. blocking */
  116. # define LOCK_UN 8 /* remove lock */
  117. #endif
  118. #ifdef __USE_GNU
  119. # define LOCK_MAND 32 /* This is a mandatory flock: */
  120. # define LOCK_READ 64 /* ... which allows concurrent read operations. */
  121. # define LOCK_WRITE 128 /* ... which allows concurrent write operations. */
  122. # define LOCK_RW 192 /* ... Which allows concurrent read & write operations. */
  123. #endif
  124. #ifdef __USE_GNU
  125. /* Types of directory notifications that may be requested with F_NOTIFY. */
  126. # define DN_ACCESS 0x00000001 /* File accessed. */
  127. # define DN_MODIFY 0x00000002 /* File modified. */
  128. # define DN_CREATE 0x00000004 /* File created. */
  129. # define DN_DELETE 0x00000008 /* File removed. */
  130. # define DN_RENAME 0x00000010 /* File renamed. */
  131. # define DN_ATTRIB 0x00000020 /* File changed attibutes. */
  132. # define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */
  133. #endif
  134. struct flock
  135. {
  136. short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
  137. short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
  138. #ifndef __USE_FILE_OFFSET64
  139. __off_t l_start; /* Offset where the lock begins. */
  140. __off_t l_len; /* Size of the locked area; zero means until EOF. */
  141. #else
  142. __off64_t l_start; /* Offset where the lock begins. */
  143. __off64_t l_len; /* Size of the locked area; zero means until EOF. */
  144. #endif
  145. __pid_t l_pid; /* Process holding the lock. */
  146. };
  147. #ifdef __USE_LARGEFILE64
  148. struct flock64
  149. {
  150. short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
  151. short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
  152. __off64_t l_start; /* Offset where the lock begins. */
  153. __off64_t l_len; /* Size of the locked area; zero means until EOF. */
  154. __pid_t l_pid; /* Process holding the lock. */
  155. };
  156. #endif
  157. /* Define some more compatibility macros to be backward compatible with
  158. BSD systems which did not managed to hide these kernel macros. */
  159. #ifdef __USE_BSD
  160. # define FAPPEND O_APPEND
  161. # define FFSYNC O_FSYNC
  162. # define FASYNC O_ASYNC
  163. # define FNONBLOCK O_NONBLOCK
  164. # define FNDELAY O_NDELAY
  165. #endif /* Use BSD. */
  166. /* Advise to `posix_fadvise'. */
  167. #ifdef __USE_XOPEN2K
  168. # define POSIX_FADV_NORMAL 0 /* No further special treatment. */
  169. # define POSIX_FADV_RANDOM 1 /* Expect random page references. */
  170. # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
  171. # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
  172. # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
  173. # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
  174. #endif
  175. #ifdef __USE_GNU
  176. # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages
  177. in the range before performing the
  178. write. */
  179. # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those
  180. dirty pages in the range which are
  181. not presently under writeback. */
  182. # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages in
  183. the range after performing the
  184. write. */
  185. #endif
  186. __BEGIN_DECLS
  187. #if 0 /*def __USE_GNU*/
  188. /* Provide kernel hint to read ahead. */
  189. extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
  190. __THROW;
  191. /* Selective file content synch'ing. */
  192. extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
  193. unsigned int __flags);
  194. /* Splice address range into a pipe. */
  195. extern int vmsplice (int __fdout, const struct iovec *__iov, size_t __count,
  196. unsigned int __flags);
  197. /* Splice two files together. */
  198. extern int splice (int __fdin, int __fdout, size_t __len, unsigned int __flags)
  199. __THROW;
  200. /* In-kernel implementation of tee for pipe buffers. */
  201. extern int tee (int __fdin, int __fdout, size_t __len, unsigned int __flags)
  202. __THROW;
  203. #endif
  204. __END_DECLS