fcntl.h 6.2 KB

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  1. #ifndef _FCNTL_H
  2. # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
  3. #endif
  4. #include <sys/types.h>
  5. #ifdef __USE_GNU
  6. # include <bits/uio.h>
  7. #endif
  8. /*
  9. * open/fcntl - O_SYNC is only implemented on blocks devices and on files
  10. * located on an ext2 file system
  11. */
  12. #define O_ACCMODE 00000003
  13. #define O_RDONLY 00000000
  14. #define O_WRONLY 00000001
  15. #define O_RDWR 00000002
  16. #define O_CREAT 00000100 /* not fcntl */
  17. #define O_EXCL 00000200 /* not fcntl */
  18. #define O_NOCTTY 00000400 /* not fcntl */
  19. #define O_TRUNC 00001000 /* not fcntl */
  20. #define O_APPEND 00002000
  21. #define O_NONBLOCK 00004000
  22. #define O_NDELAY O_NONBLOCK
  23. #define O_SYNC 00010000
  24. #define O_ASYNC 00020000
  25. #ifdef __USE_GNU
  26. # define O_DIRECT 00040000 /* must be a directory */
  27. # define O_DIRECTORY 00200000 /* direct disk access */
  28. # define O_NOFOLLOW 00400000 /* don't follow links */
  29. # define O_NOATIME 01000000 /* don't set atime */
  30. #endif
  31. #ifdef __USE_LARGEFILE64
  32. # define O_LARGEFILE 00100000
  33. #endif
  34. /* For now Linux has synchronisity options for data and read operations.
  35. We define the symbols here but let them do the same as O_SYNC since
  36. this is a superset. */
  37. #if defined __USE_POSIX199309 || defined __USE_UNIX98
  38. # define O_DSYNC O_SYNC /* Synchronize data. */
  39. # define O_RSYNC O_SYNC /* Synchronize read operations. */
  40. #endif
  41. #define F_DUPFD 0 /* dup */
  42. #define F_GETFD 1 /* get close_on_exec */
  43. #define F_SETFD 2 /* set/clear close_on_exec */
  44. #define F_GETFL 3 /* get file->f_flags */
  45. #define F_SETFL 4 /* set file->f_flags */
  46. #ifndef __USE_FILE_OFFSET64
  47. # define F_GETLK 5
  48. # define F_SETLK 6
  49. # define F_SETLKW 7
  50. #else
  51. # define F_GETLK F_GETLK64
  52. # define F_SETLK F_SETLK64
  53. # define F_SETLKW F_SETLKW64
  54. #endif
  55. #define F_GETLK64 12 /* using 'struct flock64' */
  56. #define F_SETLK64 13
  57. #define F_SETLKW64 14
  58. #if defined __USE_BSD || defined __USE_XOPEN2K
  59. # define F_SETOWN 8 /* for sockets. */
  60. # define F_GETOWN 9 /* for sockets. */
  61. #endif
  62. #ifdef __USE_GNU
  63. # define F_SETSIG 10 /* for sockets. */
  64. # define F_GETSIG 11 /* for sockets. */
  65. #endif
  66. #ifdef __USE_GNU
  67. # define F_SETLEASE 1024 /* Set a lease. */
  68. # define F_GETLEASE 1025 /* Enquire what lease is active. */
  69. # define F_NOTIFY 1026 /* Request notfications on a directory. */
  70. #endif
  71. /* for F_[GET|SET]FL */
  72. #define FD_CLOEXEC 1 /* actually anything with low bit set goes */
  73. /* for posix fcntl() and lockf() */
  74. #define F_RDLCK 0
  75. #define F_WRLCK 1
  76. #define F_UNLCK 2
  77. /* for old implementation of bsd flock () */
  78. #define F_EXLCK 4 /* or 3 */
  79. #define F_SHLCK 8 /* or 4 */
  80. /* for leases */
  81. #define F_INPROGRESS 16
  82. #ifdef __USE_BSD
  83. /* operations for bsd flock(), also used by the kernel implementation */
  84. # define LOCK_SH 1 /* shared lock */
  85. # define LOCK_EX 2 /* exclusive lock */
  86. # define LOCK_NB 4 /* or'd with one of the above to prevent
  87. blocking */
  88. # define LOCK_UN 8 /* remove lock */
  89. #endif
  90. #ifdef __USE_GNU
  91. # define LOCK_MAND 32 /* This is a mandatory flock */
  92. # define LOCK_READ 64 /* ... Which allows concurrent
  93. read operations */
  94. # define LOCK_WRITE 128 /* ... Which allows concurrent
  95. write operations */
  96. # define LOCK_RW 192 /* ... Which allows concurrent
  97. read & write ops */
  98. #endif
  99. #ifdef __USE_GNU
  100. /* Types of directory notifications that may be requested with F_NOTIFY. */
  101. # define DN_ACCESS 0x00000001 /* File accessed. */
  102. # define DN_MODIFY 0x00000002 /* File modified. */
  103. # define DN_CREATE 0x00000004 /* File created. */
  104. # define DN_DELETE 0x00000008 /* File removed. */
  105. # define DN_RENAME 0x00000010 /* File renamed. */
  106. # define DN_ATTRIB 0x00000020 /* File changed attibutes. */
  107. # define DN_MULTISHOT 0x80000000 /* Don't remove notifier. */
  108. #endif
  109. struct flock {
  110. short l_type;
  111. short l_whence;
  112. #ifndef __USE_FILE_OFFSET64
  113. __off_t l_start;
  114. __off_t l_len;
  115. #else
  116. __off64_t l_start;
  117. __off64_t l_len;
  118. #endif
  119. __pid_t l_pid;
  120. };
  121. #ifdef __USE_LARGEFILE64
  122. struct flock64 {
  123. short l_type;
  124. short l_whence;
  125. __off64_t l_start;
  126. __off64_t l_len;
  127. __pid_t l_pid;
  128. };
  129. #endif
  130. /* Define some more compatibility macros to be backward compatible with
  131. * BSD systems which did not managed to hide these kernel macros. */
  132. #ifdef __USE_BSD
  133. # define FAPPEND O_APPEND
  134. # define FFSYNC O_FSYNC
  135. # define FASYNC O_ASYNC
  136. # define FNONBLOCK O_NONBLOCK
  137. # define FNDELAY O_NDELAY
  138. #endif /* Use BSD. */
  139. /* Advise to `posix_fadvise'. */
  140. #ifdef __USE_XOPEN2K
  141. # define POSIX_FADV_NORMAL 0 /* No further special treatment. */
  142. # define POSIX_FADV_RANDOM 1 /* Expect random page references. */
  143. # define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
  144. # define POSIX_FADV_WILLNEED 3 /* Will need these pages. */
  145. # define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
  146. # define POSIX_FADV_NOREUSE 5 /* Data will be accessed once. */
  147. #endif
  148. #ifdef __USE_GNU
  149. /* Flags for SYNC_FILE_RANGE. */
  150. # define SYNC_FILE_RANGE_WAIT_BEFORE 1 /* Wait upon writeout of all pages
  151. in the range before performing
  152. the write */
  153. # define SYNC_FILE_RANGE_WRITE 2 /* Initiate writeout of all those
  154. dirty pages in the range which are
  155. not presently under writeback */
  156. # define SYNC_FILE_RANGE_WAIT_AFTER 4 /* Wait upon writeout of all pages
  157. in the range after performing the
  158. write */
  159. /* Flags for splice() and vmsplice() */
  160. # define SPLICE_F_MOVE 1 /* Move pages instead of copying */
  161. # define SPLICE_F_NONBLOCK 2 /* Don't block on the pipe splicing
  162. (but we may still block on the fd
  163. we splice from/to) */
  164. # define SPLICE_F_MORE 4 /* Expect more data */
  165. # define SPLICE_F_GIFT 8 /* Pages passed in are a gift */
  166. __BEGIN_DECLS
  167. /* Selective file content synch'ing */
  168. extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
  169. unsigned int __flags);
  170. /* Splice address range into a pipe */
  171. extern ssize_t vmsplice (int __fdout, const struct iovec *__iov,
  172. size_t __count, unsigned int __flags);
  173. /* Splice two files together */
  174. extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout,
  175. __off64_t *__offout, size_t __len,
  176. unsigned int __flags);
  177. /* In-kernel implementation of tee for pipe buffers */
  178. extern ssize_t tee (int __fdin, int __fdout, size_t __len,
  179. unsigned int __flags);
  180. __END_DECLS
  181. #endif