fcntl.h 7.6 KB

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  1. /* O_*, F_*, FD_* bit values for Linux/SPARC.
  2. Copyright (C) 1995, 1996, 1997, 1998, 2000, 2003, 2004
  3. Free Software Foundation, Inc.
  4. This file is part of the GNU C Library.
  5. The GNU C Library is free software; you can redistribute it and/or
  6. modify it under the terms of the GNU Lesser General Public
  7. License as published by the Free Software Foundation; either
  8. version 2.1 of the License, or (at your option) any later version.
  9. The GNU C Library is distributed in the hope that it will be useful,
  10. but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12. Lesser General Public License for more details.
  13. You should have received a copy of the GNU Lesser General Public
  14. License along with the GNU C Library; if not, write to the Free
  15. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  16. 02111-1307 USA. */
  17. #ifndef _FCNTL_H
  18. # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
  19. #endif
  20. #include <sys/types.h>
  21. #include <bits/wordsize.h>
  22. /* open/fcntl - O_SYNC is only implemented on blocks devices and on files
  23. located on an ext2 file system */
  24. #define O_RDONLY 0x0000
  25. #define O_WRONLY 0x0001
  26. #define O_RDWR 0x0002
  27. #define O_ACCMODE 0x0003
  28. #define O_APPEND 0x0008
  29. #define O_ASYNC 0x0040
  30. #define O_CREAT 0x0200 /* not fcntl */
  31. #define O_TRUNC 0x0400 /* not fcntl */
  32. #define O_EXCL 0x0800 /* not fcntl */
  33. #define O_SYNC 0x2000
  34. #define O_NONBLOCK 0x4000
  35. #define O_NDELAY (0x0004 | O_NONBLOCK)
  36. #define O_NOCTTY 0x8000 /* not fcntl */
  37. #ifdef __USE_GNU
  38. # define O_DIRECTORY 0x10000 /* must be a directory */
  39. # define O_NOFOLLOW 0x20000 /* don't follow links */
  40. # define O_DIRECT 0x100000 /* direct disk access hint */
  41. # define O_NOATIME 0x200000 /* Do not set atime. */
  42. #endif
  43. #ifdef __USE_LARGEFILE64
  44. # if __WORDSIZE == 64
  45. # define O_LARGEFILE 0
  46. # else
  47. # define O_LARGEFILE 0x40000
  48. # endif
  49. #endif
  50. /* For now Linux has no synchronisity options for data and read
  51. operations. We define the symbols here but let them do the same as
  52. O_SYNC since this is a superset. */
  53. #if defined __USE_POSIX199309 || defined __USE_UNIX98
  54. # define O_DSYNC O_SYNC /* Synchronize data. */
  55. # define O_RSYNC O_SYNC /* Synchronize read operations. */
  56. #endif
  57. /* For now Linux has synchronisity options for data and read operations.
  58. We define the symbols here but let them do the same as O_SYNC since
  59. this is a superset. */
  60. #if defined __USE_POSIX199309 || defined __USE_UNIX98
  61. # define O_DSYNC O_SYNC /* Synchronize data. */
  62. # define O_RSYNC O_SYNC /* Synchronize read operations. */
  63. #endif
  64. /* Values for the second argument to `fcntl'. */
  65. #define F_DUPFD 0 /* Duplicate file descriptor. */
  66. #define F_GETFD 1 /* Get file descriptor flags. */
  67. #define F_SETFD 2 /* Set file descriptor flags. */
  68. #define F_GETFL 3 /* Get file status flags. */
  69. #define F_SETFL 4 /* Set file status flags. */
  70. #if defined __USE_BSD || defined __USE_UNIX98
  71. # define F_GETOWN 5 /* Get owner of socket (receiver of SIGIO). */
  72. # define F_SETOWN 6 /* Set owner of socket (receiver of SIGIO). */
  73. #endif
  74. #ifndef __USE_FILE_OFFSET64
  75. # define F_GETLK 7 /* Get record locking info. */
  76. # define F_SETLK 8 /* Set record locking info (non-blocking). */
  77. # define F_SETLKW 9 /* Set record locking info (blocking). */
  78. #else
  79. # define F_GETLK F_GETLK64 /* Get record locking info. */
  80. # define F_SETLK F_SETLK64 /* Set record locking info (non-blocking).*/
  81. # define F_SETLKW F_SETLKW64 /* Set record locking info (blocking). */
  82. #endif
  83. #ifdef __USE_GNU
  84. # define F_SETSIG 10 /* Set number of signal to be sent. */
  85. # define F_GETSIG 11 /* Get number of signal to be sent. */
  86. #endif
  87. #ifdef __USE_GNU
  88. # define F_SETLEASE 1024 /* Set a lease. */
  89. # define F_GETLEASE 1025 /* Enquire what lease is active. */
  90. # define F_NOTIFY 1026 /* Request notfications on a directory. */
  91. #endif
  92. #if __WORDSIZE == 64
  93. # define F_GETLK64 7 /* Get record locking info. */
  94. # define F_SETLK64 8 /* Set record locking info (non-blocking). */
  95. # define F_SETLKW64 9 /* Set record locking info (blocking). */
  96. #else
  97. # define F_GETLK64 12 /* Get record locking info. */
  98. # define F_SETLK64 13 /* Set record locking info (non-blocking). */
  99. # define F_SETLKW64 14 /* Set record locking info (blocking). */
  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 1 /* Read lock. */
  105. #define F_WRLCK 2 /* Write lock. */
  106. #define F_UNLCK 3 /* 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. short int __unused;
  147. };
  148. #ifdef __USE_LARGEFILE64
  149. struct flock64
  150. {
  151. short int l_type; /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK. */
  152. short int l_whence; /* Where `l_start' is relative to (like `lseek'). */
  153. __off64_t l_start; /* Offset where the lock begins. */
  154. __off64_t l_len; /* Size of the locked area; zero means until EOF. */
  155. __pid_t l_pid; /* Process holding the lock. */
  156. short int __unused;
  157. };
  158. #endif
  159. /* Define some more compatibility macros to be backward compatible with
  160. BSD systems which did not managed to hide these kernel macros. */
  161. #ifdef __USE_BSD
  162. # define FAPPEND O_APPEND
  163. # define FFSYNC O_FSYNC
  164. # define FASYNC O_ASYNC
  165. # define FNONBLOCK O_NONBLOCK
  166. # define FNDELAY O_NDELAY
  167. #endif /* Use BSD. */
  168. /* Advise to `posix_fadvise'. */
  169. #ifdef __USE_XOPEN2K
  170. # define POSIX_FADV_NORMAL 0 /* No further special treatment. */
  171. # define POSIX_FADV_RANDOM 1 /* Expect random page references. */
  172. # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
  173. # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
  174. # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
  175. # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
  176. #endif
  177. __BEGIN_DECLS
  178. /* Provide kernel hint to read ahead. */
  179. extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
  180. __THROW;
  181. __END_DECLS