sysdeps/unix/sysv/linux/alpha/bits/fcntl.h

   1 /* O_*, F_*, FD_* bit values for Linux.
   2    Copyright (C) 1995-1999, 2000, 2004 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   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
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _FCNTL_H
  21 # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
  22 #endif
  23
  24
  25 #include <sys/types.h>
  26
  27
  28 /* open/fcntl - O_SYNC is only implemented on blocks devices and on files
  29    located on an ext2 file system */
  30 #define O_ACCMODE         0003
  31 #define O_RDONLY            00
  32 #define O_WRONLY            01
  33 #define O_RDWR              02
  34 #define O_CREAT          01000  /* not fcntl */
  35 #define O_TRUNC          02000  /* not fcntl */
  36 #define O_EXCL           04000  /* not fcntl */
  37 #define O_NOCTTY        010000  /* not fcntl */
  38
  39 #define O_NONBLOCK       00004
  40 #define O_APPEND         00010
  41 #define O_NDELAY        O_NONBLOCK
  42 #define O_SYNC          040000
  43 #define O_FSYNC         O_SYNC
  44 #define O_ASYNC         020000  /* fcntl, for BSD compatibility */
  45
  46 #ifdef __USE_GNU
  47 # define O_DIRECT       040000  /* Direct disk access.  */
  48 # define O_DIRECTORY    0100000 /* Must be a directory.  */
  49 # define O_NOFOLLOW     0200000 /* Do not follow links.  */
  50 # define O_NOATIME      04000000 /* Do not set atime.  */
  51 #endif
  52
  53 #ifdef __USE_LARGEFILE64
  54 /* Not necessary, files are always with 64bit off_t.  */
  55 # define O_LARGEFILE    0
  56 #endif
  57
  58 /* For now Linux has synchronisity options for data and read operations.
  59    We define the symbols here but let them do the same as O_SYNC since
  60    this is a superset.  */
  61 #if defined __USE_POSIX199309 || defined __USE_UNIX98
  62 # define O_DSYNC        O_SYNC  /* Synchronize data.  */
  63 # define O_RSYNC        O_SYNC  /* Synchronize read operations.  */
  64 #endif
  65
  66 /* Values for the second argument to `fcntl'.  */
  67 #define F_DUPFD         0       /* Duplicate file descriptor.  */
  68 #define F_GETFD         1       /* Get file descriptor flags.  */
  69 #define F_SETFD         2       /* Set file descriptor flags.  */
  70 #define F_GETFL         3       /* Get file status flags.  */
  71 #define F_SETFL         4       /* Set file status flags.  */
  72 #define F_GETLK         7       /* Get record locking info.  */
  73 #define F_SETLK         8       /* Set record locking info (non-blocking).  */
  74 #define F_SETLKW        9       /* Set record locking info (blocking).  */
  75 #define F_GETLK64       F_GETLK /* Get record locking info.  */
  76 #define F_SETLK64       F_SETLK /* Set record locking info (non-blocking).  */
  77 #define F_SETLKW64      F_SETLKW /* Set record locking info (blocking).  */
  78
  79 #if defined __USE_BSD || defined __USE_UNIX98
  80 # define F_SETOWN       5       /* Get owner of socket (receiver of SIGIO).  */
  81 # define F_GETOWN       6       /* Set owner of socket (receiver of SIGIO).  */
  82 #endif
  83
  84 #ifdef __USE_GNU
  85 # define F_SETSIG       10      /* Set number of signal to be sent.  */
  86 # define F_GETSIG       11      /* Get number of signal to be sent.  */
  87 #endif
  88
  89 #ifdef __USE_GNU
  90 # define F_SETLEASE     1024    /* Set a lease.  */
  91 # define F_GETLEASE     1025    /* Enquire what lease is active.  */
  92 # define F_NOTIFY       1026    /* Request notfications on a directory.  */
  93 #endif
  94
  95 /* for F_[GET|SET]FL */
  96 #define FD_CLOEXEC      1       /* actually anything with low bit set goes */
  97
  98 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf() */
  99 #define F_RDLCK         1       /* Read lock.  */
 100 #define F_WRLCK         2       /* Write lock.  */
 101 #define F_UNLCK         8       /* Remove lock.  */
 102
 103 /* for old implementation of bsd flock () */
 104 #define F_EXLCK         16      /* or 3 */
 105 #define F_SHLCK         32      /* or 4 */
 106
 107 /* Operations for bsd flock(), also used by the kernel implementation */
 108 #ifdef __USE_BSD
 109 # define LOCK_SH        1       /* shared lock */
 110 # define LOCK_EX        2       /* exclusive lock */
 111 # define LOCK_NB        4       /* or'd with one of the above to prevent
 112                                    blocking */
 113 # define LOCK_UN        8       /* remove lock */
 114 #endif
 115
 116 #ifdef __USE_GNU
 117 # define LOCK_MAND      32      /* This is a mandatory flock:   */
 118 # define LOCK_READ      64      /* ... which allows concurrent read operations.  */
 119 # define LOCK_WRITE     128     /* ... which allows concurrent write operations.  */
 120 # define LOCK_RW        192     /* ... Which allows concurrent read & write operations.  */
 121 #endif
 122
 123 #ifdef __USE_GNU
 124 /* Types of directory notifications that may be requested with F_NOTIFY.  */
 125 # define DN_ACCESS      0x00000001      /* File accessed.  */
 126 # define DN_MODIFY      0x00000002      /* File modified.  */
 127 # define DN_CREATE      0x00000004      /* File created.  */
 128 # define DN_DELETE      0x00000008      /* File removed.  */
 129 # define DN_RENAME      0x00000010      /* File renamed.  */
 130 # define DN_ATTRIB      0x00000020      /* File changed attibutes.  */
 131 # define DN_MULTISHOT   0x80000000      /* Don't remove notifier.  */
 132 #endif
 133
 134 /* We don't need to support __USE_FILE_OFFSET64.  */
 135 struct flock
 136   {
 137     short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
 138     short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
 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     __pid_t l_pid;      /* Process holding the lock.  */
 142   };
 143
 144 #ifdef __USE_LARGEFILE64
 145 struct flock64
 146   {
 147     short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
 148     short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
 149     __off64_t l_start;  /* Offset where the lock begins.  */
 150     __off64_t l_len;    /* Size of the locked area; zero means until EOF.  */
 151     __pid_t l_pid;      /* Process holding the lock.  */
 152   };
 153 #endif
 154
 155
 156 /* Define some more compatibility macros to be backward compatible with
 157    BSD systems which did not managed to hide these kernel macros.  */
 158 #ifdef  __USE_BSD
 159 # define FAPPEND        O_APPEND
 160 # define FFSYNC         O_FSYNC
 161 # define FASYNC         O_ASYNC
 162 # define FNONBLOCK      O_NONBLOCK
 163 # define FNDELAY        O_NDELAY
 164 #endif /* Use BSD.  */
 165
 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
 176 __BEGIN_DECLS
 177
 178 /* Provide kernel hint to read ahead.  */
 179 extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
 180     __THROW;
 181
 182 __END_DECLS