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

   1 /* O_*, F_*, FD_* bit values for Linux.
   2    Copyright (C) 1995-2000, 2004, 2005, 2006 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 #include <sys/types.h>
  25 #ifdef __USE_GNU
  26 # include <bits/uio.h>
  27 #endif
  28
  29
  30 /* open/fcntl - O_SYNC is only implemented on blocks devices and on files
  31    located on an ext2 file system */
  32 #define O_ACCMODE         0003
  33 #define O_RDONLY            00
  34 #define O_WRONLY            01
  35 #define O_RDWR              02
  36 #define O_CREAT          01000  /* not fcntl */
  37 #define O_TRUNC          02000  /* not fcntl */
  38 #define O_EXCL           04000  /* not fcntl */
  39 #define O_NOCTTY        010000  /* not fcntl */
  40
  41 #define O_NONBLOCK       00004
  42 #define O_APPEND         00010
  43 #define O_NDELAY        O_NONBLOCK
  44 #define O_SYNC          040000
  45 #define O_FSYNC         O_SYNC
  46 #define O_ASYNC         020000  /* fcntl, for BSD compatibility */
  47
  48 #ifdef __USE_GNU
  49 # define O_DIRECTORY    0100000 /* Must be a directory.  */
  50 # define O_NOFOLLOW     0200000 /* Do not follow links.  */
  51 # define O_DIRECT       02000000 /* Direct disk access.  */
  52 # define O_NOATIME      04000000 /* Do not set atime.  */
  53 #endif
  54
  55 #ifdef __USE_LARGEFILE64
  56 /* Not necessary, files are always with 64bit off_t.  */
  57 # define O_LARGEFILE    0
  58 #endif
  59
  60 /* For now Linux has synchronisity options for data and read operations.
  61    We define the symbols here but let them do the same as O_SYNC since
  62    this is a superset.  */
  63 #if defined __USE_POSIX199309 || defined __USE_UNIX98
  64 # define O_DSYNC        O_SYNC  /* Synchronize data.  */
  65 # define O_RSYNC        O_SYNC  /* Synchronize read operations.  */
  66 #endif
  67
  68 /* Values for the second argument to `fcntl'.  */
  69 #define F_DUPFD         0       /* Duplicate file descriptor.  */
  70 #define F_GETFD         1       /* Get file descriptor flags.  */
  71 #define F_SETFD         2       /* Set file descriptor flags.  */
  72 #define F_GETFL         3       /* Get file status flags.  */
  73 #define F_SETFL         4       /* Set file status flags.  */
  74 #define F_GETLK         7       /* Get record locking info.  */
  75 #define F_SETLK         8       /* Set record locking info (non-blocking).  */
  76 #define F_SETLKW        9       /* Set record locking info (blocking).  */
  77 #define F_GETLK64       F_GETLK /* Get record locking info.  */
  78 #define F_SETLK64       F_SETLK /* Set record locking info (non-blocking).  */
  79 #define F_SETLKW64      F_SETLKW /* Set record locking info (blocking).  */
  80
  81 #if defined __USE_BSD || defined __USE_UNIX98
  82 # define F_SETOWN       5       /* Get owner of socket (receiver of SIGIO).  */
  83 # define F_GETOWN       6       /* Set owner of socket (receiver of SIGIO).  */
  84 #endif
  85
  86 #ifdef __USE_GNU
  87 # define F_SETSIG       10      /* Set number of signal to be sent.  */
  88 # define F_GETSIG       11      /* Get number of signal to be sent.  */
  89 #endif
  90
  91 #ifdef __USE_GNU
  92 # define F_SETLEASE     1024    /* Set a lease.  */
  93 # define F_GETLEASE     1025    /* Enquire what lease is active.  */
  94 # define F_NOTIFY       1026    /* Request notfications on a directory.  */
  95 #endif
  96
  97 /* for F_[GET|SET]FL */
  98 #define FD_CLOEXEC      1       /* actually anything with low bit set goes */
  99
 100 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf() */
 101 #define F_RDLCK         1       /* Read lock.  */
 102 #define F_WRLCK         2       /* Write lock.  */
 103 #define F_UNLCK         8       /* Remove lock.  */
 104
 105 /* for old implementation of bsd flock () */
 106 #define F_EXLCK         16      /* or 3 */
 107 #define F_SHLCK         32      /* or 4 */
 108
 109 /* Operations for bsd flock(), also used by the kernel implementation */
 110 #ifdef __USE_BSD
 111 # define LOCK_SH        1       /* shared lock */
 112 # define LOCK_EX        2       /* exclusive lock */
 113 # define LOCK_NB        4       /* or'd with one of the above to prevent
 114                                    blocking */
 115 # define LOCK_UN        8       /* remove lock */
 116 #endif
 117
 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
 125 #ifdef __USE_GNU
 126 /* Types of directory notifications that may be requested with F_NOTIFY.  */
 127 # define DN_ACCESS      0x00000001      /* File accessed.  */
 128 # define DN_MODIFY      0x00000002      /* File modified.  */
 129 # define DN_CREATE      0x00000004      /* File created.  */
 130 # define DN_DELETE      0x00000008      /* File removed.  */
 131 # define DN_RENAME      0x00000010      /* File renamed.  */
 132 # define DN_ATTRIB      0x00000020      /* File changed attibutes.  */
 133 # define DN_MULTISHOT   0x80000000      /* Don't remove notifier.  */
 134 #endif
 135
 136 /* We don't need to support __USE_FILE_OFFSET64.  */
 137 struct flock
 138   {
 139     short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
 140     short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
 141     __off_t l_start;    /* Offset where the lock begins.  */
 142     __off_t l_len;      /* Size of the locked area; zero means until EOF.  */
 143     __pid_t l_pid;      /* Process holding the lock.  */
 144   };
 145
 146 #ifdef __USE_LARGEFILE64
 147 struct flock64
 148   {
 149     short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
 150     short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
 151     __off64_t l_start;  /* Offset where the lock begins.  */
 152     __off64_t l_len;    /* Size of the locked area; zero means until EOF.  */
 153     __pid_t l_pid;      /* Process holding the lock.  */
 154   };
 155 #endif
 156
 157
 158 /* Define some more compatibility macros to be backward compatible with
 159    BSD systems which did not managed to hide these kernel macros.  */
 160 #ifdef  __USE_BSD
 161 # define FAPPEND        O_APPEND
 162 # define FFSYNC         O_FSYNC
 163 # define FASYNC         O_ASYNC
 164 # define FNONBLOCK      O_NONBLOCK
 165 # define FNDELAY        O_NDELAY
 166 #endif /* Use BSD.  */
 167
 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
 178
 179 #ifdef __USE_GNU
 180 /* Flags for SYNC_FILE_RANGE.  */
 181 # define SYNC_FILE_RANGE_WAIT_BEFORE    1 /* Wait upon writeout of all pages
 182                                              in the range before performing the
 183                                              write.  */
 184 # define SYNC_FILE_RANGE_WRITE          2 /* Initiate writeout of all those
 185                                              dirty pages in the range which are
 186                                              not presently under writeback.  */
 187 # define SYNC_FILE_RANGE_WAIT_AFTER     4 /* Wait upon writeout of all pages in
 188                                              the range after performing the
 189                                              write.  */
 190
 191 /* Flags for SPLICE and VMSPLICE.  */
 192 # define SPLICE_F_MOVE          1       /* Move pages instead of copying.  */
 193 # define SPLICE_F_NONBLOCK      2       /* Don't block on the pipe splicing
 194                                            (but we may still block on the fd
 195                                            we splice from/to).  */
 196 # define SPLICE_F_MORE          4       /* Expect more data.  */
 197 # define SPLICE_F_GIFT          8       /* Pages passed in are a gift.  */
 198 #endif
 199
 200 __BEGIN_DECLS
 201
 202 #ifdef __USE_GNU
 203
 204 /* Provide kernel hint to read ahead.  */
 205 extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
 206     __THROW;
 207
 208
 209 /* Selective file content synch'ing.  */
 210 extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
 211                             unsigned int __flags);
 212
 213
 214 /* Splice address range into a pipe.  */
 215 extern int vmsplice (int __fdout, const struct iovec *__iov, size_t __count,
 216                      unsigned int __flags);
 217
 218 /* Splice two files together.  */
 219 extern int splice (int __fdin, int __fdout, size_t __len, unsigned int __flags)
 220     __THROW;
 221
 222 /* In-kernel implementation of tee for pipe buffers.  */
 223 extern int tee (int __fdin, int __fdout, size_t __len, unsigned int __flags)
 224     __THROW;
 225
 226 #endif
 227
 228 __END_DECLS