sysdeps/unix/sysv/linux/x86_64/bits/fcntl.h

   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
   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 #include <bits/wordsize.h>
  26 #ifdef __USE_GNU
  27 # include <bits/uio.h>
  28 #endif
  29
  30
  31 /* open/fcntl - O_SYNC is only implemented on blocks devices and on files
  32    located on an ext2 file system */
  33 #define O_ACCMODE          0003
  34 #define O_RDONLY             00
  35 #define O_WRONLY             01
  36 #define O_RDWR               02
  37 #define O_CREAT            0100 /* not fcntl */
  38 #define O_EXCL             0200 /* not fcntl */
  39 #define O_NOCTTY           0400 /* not fcntl */
  40 #define O_TRUNC           01000 /* not fcntl */
  41 #define O_APPEND          02000
  42 #define O_NONBLOCK        04000
  43 #define O_NDELAY        O_NONBLOCK
  44 #define O_SYNC           010000
  45 #define O_FSYNC          O_SYNC
  46 #define O_ASYNC          020000
  47
  48 #ifdef __USE_GNU
  49 # define O_DIRECT        040000 /* Direct disk access.  */
  50 # define O_DIRECTORY    0200000 /* Must be a directory.  */
  51 # define O_NOFOLLOW     0400000 /* Do not follow links.  */
  52 # define O_NOATIME     01000000 /* Do not set atime.  */
  53 #endif
  54
  55 /* For now Linux has synchronisity options for data and read operations.
  56    We define the symbols here but let them do the same as O_SYNC since
  57    this is a superset.  */
  58 #if defined __USE_POSIX199309 || defined __USE_UNIX98
  59 # define O_DSYNC        O_SYNC  /* Synchronize data.  */
  60 # define O_RSYNC        O_SYNC  /* Synchronize read operations.  */
  61 #endif
  62
  63 #ifdef __USE_LARGEFILE64
  64 # if __WORDSIZE == 64
  65 #  define O_LARGEFILE   0
  66 # else
  67 #  define O_LARGEFILE   0100000
  68 # endif
  69 #endif
  70
  71 /* Values for the second argument to `fcntl'.  */
  72 #define F_DUPFD         0       /* Duplicate file descriptor.  */
  73 #define F_GETFD         1       /* Get file descriptor flags.  */
  74 #define F_SETFD         2       /* Set file descriptor flags.  */
  75 #define F_GETFL         3       /* Get file status flags.  */
  76 #define F_SETFL         4       /* Set file status flags.  */
  77 #if __WORDSIZE == 64
  78 # define F_GETLK        5       /* Get record locking info.  */
  79 # define F_SETLK        6       /* Set record locking info (non-blocking).  */
  80 # define F_SETLKW       7       /* Set record locking info (blocking).  */
  81 /* Not necessary, we always have 64-bit offsets.  */
  82 # define F_GETLK64      5       /* Get record locking info.  */
  83 # define F_SETLK64      6       /* Set record locking info (non-blocking).  */
  84 # define F_SETLKW64     7       /* Set record locking info (blocking).  */
  85 #else
  86 # ifndef __USE_FILE_OFFSET64
  87 #  define F_GETLK       5       /* Get record locking info.  */
  88 #  define F_SETLK       6       /* Set record locking info (non-blocking).  */
  89 #  define F_SETLKW      7       /* Set record locking info (blocking).  */
  90 # else
  91 #  define F_GETLK       F_GETLK64  /* Get record locking info.  */
  92 #  define F_SETLK       F_SETLK64  /* Set record locking info (non-blocking).*/
  93 #  define F_SETLKW      F_SETLKW64 /* Set record locking info (blocking).  */
  94 # endif
  95 # define F_GETLK64      12      /* Get record locking info.  */
  96 # define F_SETLK64      13      /* Set record locking info (non-blocking).  */
  97 # define F_SETLKW64     14      /* Set record locking info (blocking).  */
  98 #endif
  99
 100 #if defined __USE_BSD || defined __USE_UNIX98
 101 # define F_SETOWN       8       /* Get owner of socket (receiver of SIGIO).  */
 102 # define F_GETOWN       9       /* Set owner of socket (receiver of SIGIO).  */
 103 #endif
 104
 105 #ifdef __USE_GNU
 106 # define F_SETSIG       10      /* Set number of signal to be sent.  */
 107 # define F_GETSIG       11      /* Get number of signal to be sent.  */
 108 #endif
 109
 110 #ifdef __USE_GNU
 111 # define F_SETLEASE     1024    /* Set a lease.  */
 112 # define F_GETLEASE     1025    /* Enquire what lease is active.  */
 113 # define F_NOTIFY       1026    /* Request notfications on a directory.  */
 114 #endif
 115
 116 /* For F_[GET|SET]FD.  */
 117 #define FD_CLOEXEC      1       /* actually anything with low bit set goes */
 118
 119 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf().  */
 120 #define F_RDLCK         0       /* Read lock.  */
 121 #define F_WRLCK         1       /* Write lock.  */
 122 #define F_UNLCK         2       /* Remove lock.  */
 123
 124 /* For old implementation of bsd flock().  */
 125 #define F_EXLCK         4       /* or 3 */
 126 #define F_SHLCK         8       /* or 4 */
 127
 128 #ifdef __USE_BSD
 129 /* Operations for bsd flock(), also used by the kernel implementation.  */
 130 # define LOCK_SH        1       /* shared lock */
 131 # define LOCK_EX        2       /* exclusive lock */
 132 # define LOCK_NB        4       /* or'd with one of the above to prevent
 133                                    blocking */
 134 # define LOCK_UN        8       /* remove lock */
 135 #endif
 136
 137 #ifdef __USE_GNU
 138 # define LOCK_MAND      32      /* This is a mandatory flock:   */
 139 # define LOCK_READ      64      /* ... which allows concurrent read operations.  */
 140 # define LOCK_WRITE     128     /* ... which allows concurrent write operations.  */
 141 # define LOCK_RW        192     /* ... Which allows concurrent read & write operations.  */
 142 #endif
 143
 144 #ifdef __USE_GNU
 145 /* Types of directory notifications that may be requested with F_NOTIFY.  */
 146 # define DN_ACCESS      0x00000001      /* File accessed.  */
 147 # define DN_MODIFY      0x00000002      /* File modified.  */
 148 # define DN_CREATE      0x00000004      /* File created.  */
 149 # define DN_DELETE      0x00000008      /* File removed.  */
 150 # define DN_RENAME      0x00000010      /* File renamed.  */
 151 # define DN_ATTRIB      0x00000020      /* File changed attibutes.  */
 152 # define DN_MULTISHOT   0x80000000      /* Don't remove notifier.  */
 153 #endif
 154
 155 struct flock
 156   {
 157     short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
 158     short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
 159 #ifndef __USE_FILE_OFFSET64
 160     __off_t l_start;    /* Offset where the lock begins.  */
 161     __off_t l_len;      /* Size of the locked area; zero means until EOF.  */
 162 #else
 163     __off64_t l_start;  /* Offset where the lock begins.  */
 164     __off64_t l_len;    /* Size of the locked area; zero means until EOF.  */
 165 #endif
 166     __pid_t l_pid;      /* Process holding the lock.  */
 167   };
 168
 169 #ifdef __USE_LARGEFILE64
 170 struct flock64
 171   {
 172     short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
 173     short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
 174     __off64_t l_start;  /* Offset where the lock begins.  */
 175     __off64_t l_len;    /* Size of the locked area; zero means until EOF.  */
 176     __pid_t l_pid;      /* Process holding the lock.  */
 177   };
 178 #endif
 179
 180 /* Define some more compatibility macros to be backward compatible with
 181    BSD systems which did not managed to hide these kernel macros.  */
 182 #ifdef  __USE_BSD
 183 # define FAPPEND        O_APPEND
 184 # define FFSYNC         O_FSYNC
 185 # define FASYNC         O_ASYNC
 186 # define FNONBLOCK      O_NONBLOCK
 187 # define FNDELAY        O_NDELAY
 188 #endif /* Use BSD.  */
 189
 190 /* Advise to `posix_fadvise'.  */
 191 #ifdef __USE_XOPEN2K
 192 # define POSIX_FADV_NORMAL      0 /* No further special treatment.  */
 193 # define POSIX_FADV_RANDOM      1 /* Expect random page references.  */
 194 # define POSIX_FADV_SEQUENTIAL  2 /* Expect sequential page references.  */
 195 # define POSIX_FADV_WILLNEED    3 /* Will need these pages.  */
 196 # define POSIX_FADV_DONTNEED    4 /* Don't need these pages.  */
 197 # define POSIX_FADV_NOREUSE     5 /* Data will be accessed once.  */
 198 #endif
 199
 200
 201 #ifdef __USE_GNU
 202 /* Flags for SYNC_FILE_RANGE.  */
 203 # define SYNC_FILE_RANGE_WAIT_BEFORE    1 /* Wait upon writeout of all pages
 204                                              in the range before performing the
 205                                              write.  */
 206 # define SYNC_FILE_RANGE_WRITE          2 /* Initiate writeout of all those
 207                                              dirty pages in the range which are
 208                                              not presently under writeback.  */
 209 # define SYNC_FILE_RANGE_WAIT_AFTER     4 /* Wait upon writeout of all pages in
 210                                              the range after performing the
 211                                              write.  */
 212
 213 /* Flags for SPLICE and VMSPLICE.  */
 214 # define SPLICE_F_MOVE          1       /* Move pages instead of copying.  */
 215 # define SPLICE_F_NONBLOCK      2       /* Don't block on the pipe splicing
 216                                            (but we may still block on the fd
 217                                            we splice from/to).  */
 218 # define SPLICE_F_MORE          4       /* Expect more data.  */
 219 # define SPLICE_F_GIFT          8       /* Pages passed in are a gift.  */
 220 #endif
 221
 222 __BEGIN_DECLS
 223
 224 #ifdef __USE_GNU
 225
 226 /* Provide kernel hint to read ahead.  */
 227 extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
 228     __THROW;
 229
 230
 231 /* Selective file content synch'ing.  */
 232 extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
 233                             unsigned int __flags);
 234
 235
 236 /* Splice address range into a pipe.  */
 237 extern int vmsplice (int __fdout, const struct iovec *__iov, size_t __count,
 238                      unsigned int __flags);
 239
 240 /* Splice two files together.  */
 241 extern int splice (int __fdin, __off64_t *__offin, int __fdout,
 242                    __off64_t *__offout, size_t __len, unsigned int __flags)
 243     __THROW;
 244
 245 /* In-kernel implementation of tee for pipe buffers.  */
 246 extern int tee (int __fdin, int __fdout, size_t __len, unsigned int __flags)
 247     __THROW;
 248
 249 #endif
 250
 251 __END_DECLS