sysdeps/unix/sysv/linux/s390/bits/fcntl.h

   1 /* O_*, F_*, FD_* bit values for Linux.
   2    Copyright (C) 2000,2001,2002,2004,2006,2007 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 # define O_CLOEXEC     02000000 /* Set close_on_exec.  */
  54 #endif
  55
  56 #ifdef __USE_LARGEFILE64
  57 # if __WORDSIZE == 64
  58 /* Not necessary, files are always with 64bit off_t.  */
  59 #  define O_LARGEFILE   0
  60 # else
  61 #  define O_LARGEFILE   0100000
  62 # endif
  63 #endif
  64
  65 /* For now Linux has synchronisity options for data and read operations.
  66    We define the symbols here but let them do the same as O_SYNC since
  67    this is a superset.  */
  68 #if defined __USE_POSIX199309 || defined __USE_UNIX98
  69 # define O_DSYNC        O_SYNC  /* Synchronize data.  */
  70 # define O_RSYNC        O_SYNC  /* Synchronize read operations.  */
  71 #endif
  72
  73 /* Values for the second argument to `fcntl'.  */
  74 #define F_DUPFD         0       /* Duplicate file descriptor.  */
  75 #define F_GETFD         1       /* Get file descriptor flags.  */
  76 #define F_SETFD         2       /* Set file descriptor flags.  */
  77 #define F_GETFL         3       /* Get file status flags.  */
  78 #define F_SETFL         4       /* Set file status flags.  */
  79 #if __WORDSIZE == 64
  80 # define F_GETLK        5       /* Get record locking info.  */
  81 # define F_SETLK        6       /* Set record locking info (non-blocking).  */
  82 # define F_SETLKW       7       /* Set record locking info (blocking).  */
  83 /* Not necessary, we always have 64-bit offsets.  */
  84 # define F_GETLK64      5       /* Get record locking info.  */
  85 # define F_SETLK64      6       /* Set record locking info (non-blocking).  */
  86 # define F_SETLKW64     7       /* Set record locking info (blocking).  */
  87 #else
  88 # ifndef __USE_FILE_OFFSET64
  89 #  define F_GETLK       5       /* Get record locking info.  */
  90 #  define F_SETLK       6       /* Set record locking info (non-blocking).  */
  91 #  define F_SETLKW      7       /* Set record locking info (blocking).  */
  92 # else
  93 #  define F_GETLK       F_GETLK64  /* Get record locking info.  */
  94 #  define F_SETLK       F_SETLK64  /* Set record locking info (non-blocking).*/
  95 #  define F_SETLKW      F_SETLKW64 /* Set record locking info (blocking).  */
  96 # endif
  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
 102 #if defined __USE_BSD || defined __USE_UNIX98
 103 # define F_SETOWN       8       /* Get owner of socket (receiver of SIGIO).  */
 104 # define F_GETOWN       9       /* Set owner of socket (receiver of SIGIO).  */
 105 #endif
 106
 107 #ifdef __USE_GNU
 108 # define F_SETSIG       10      /* Set number of signal to be sent.  */
 109 # define F_GETSIG       11      /* Get number of signal to be sent.  */
 110 #endif
 111
 112 #ifdef __USE_GNU
 113 # define F_SETLEASE     1024    /* Set a lease.  */
 114 # define F_GETLEASE     1025    /* Enquire what lease is active.  */
 115 # define F_NOTIFY       1026    /* Request notfications on a directory.  */
 116 # define F_DUPFD_CLOEXEC 1030   /* Duplicate file descriptor with
 117                                    close-on-exit set.  */
 118 #endif
 119
 120 /* For F_[GET|SET]FD.  */
 121 #define FD_CLOEXEC      1       /* actually anything with low bit set goes */
 122
 123 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf().  */
 124 #define F_RDLCK         0       /* Read lock.  */
 125 #define F_WRLCK         1       /* Write lock.  */
 126 #define F_UNLCK         2       /* Remove lock.  */
 127
 128 /* for old implementation of bsd flock () */
 129 #define F_EXLCK         4       /* or 3 */
 130 #define F_SHLCK         8       /* or 4 */
 131
 132 #ifdef __USE_BSD
 133 /* Operations for bsd flock(), also used by the kernel implementation */
 134 # define LOCK_SH        1       /* shared lock */
 135 # define LOCK_EX        2       /* exclusive lock */
 136 # define LOCK_NB        4       /* or'd with one of the above to prevent
 137                                    blocking */
 138 # define LOCK_UN        8       /* remove lock */
 139 #endif
 140
 141 #ifdef __USE_GNU
 142 # define LOCK_MAND      32      /* This is a mandatory flock:   */
 143 # define LOCK_READ      64      /* ... which allows concurrent read operations.  */
 144 # define LOCK_WRITE     128     /* ... which allows concurrent write operations.  */
 145 # define LOCK_RW        192     /* ... Which allows concurrent read & write operations.  */
 146 #endif
 147
 148 #ifdef __USE_GNU
 149 /* Types of directory notifications that may be requested with F_NOTIFY.  */
 150 # define DN_ACCESS      0x00000001      /* File accessed.  */
 151 # define DN_MODIFY      0x00000002      /* File modified.  */
 152 # define DN_CREATE      0x00000004      /* File created.  */
 153 # define DN_DELETE      0x00000008      /* File removed.  */
 154 # define DN_RENAME      0x00000010      /* File renamed.  */
 155 # define DN_ATTRIB      0x00000020      /* File changed attibutes.  */
 156 # define DN_MULTISHOT   0x80000000      /* Don't remove notifier.  */
 157 #endif
 158
 159 struct flock
 160   {
 161     short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
 162     short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
 163 #if __WORDSIZE == 64 || !defined __USE_FILE_OFFSET64
 164     __off_t l_start;    /* Offset where the lock begins.  */
 165     __off_t l_len;      /* Size of the locked area; zero means until EOF.  */
 166 #else
 167     __off64_t l_start;  /* Offset where the lock begins.  */
 168     __off64_t l_len;    /* Size of the locked area; zero means until EOF.  */
 169 #endif
 170     __pid_t l_pid;      /* Process holding the lock.  */
 171   };
 172
 173 #ifdef __USE_LARGEFILE64
 174 struct flock64
 175   {
 176     short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
 177     short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
 178     __off64_t l_start;  /* Offset where the lock begins.  */
 179     __off64_t l_len;    /* Size of the locked area; zero means until EOF.  */
 180     __pid_t l_pid;      /* Process holding the lock.  */
 181   };
 182 #endif
 183
 184 /* Define some more compatibility macros to be backward compatible with
 185    BSD systems which did not managed to hide these kernel macros.  */
 186 #ifdef  __USE_BSD
 187 # define FAPPEND        O_APPEND
 188 # define FFSYNC         O_FSYNC
 189 # define FASYNC         O_ASYNC
 190 # define FNONBLOCK      O_NONBLOCK
 191 # define FNDELAY        O_NDELAY
 192 #endif /* Use BSD.  */
 193
 194 /* Advise to `posix_fadvise'.  */
 195 #ifdef __USE_XOPEN2K
 196 # define POSIX_FADV_NORMAL      0 /* No further special treatment.  */
 197 # define POSIX_FADV_RANDOM      1 /* Expect random page references.  */
 198 # define POSIX_FADV_SEQUENTIAL  2 /* Expect sequential page references.  */
 199 # define POSIX_FADV_WILLNEED    3 /* Will need these pages.  */
 200 # if __WORDSIZE == 64
 201 #  define POSIX_FADV_DONTNEED   6 /* Don't need these pages.  */
 202 #  define POSIX_FADV_NOREUSE    7 /* Data will be accessed once.  */
 203 # else
 204 #  define POSIX_FADV_DONTNEED   4 /* Don't need these pages.  */
 205 #  define POSIX_FADV_NOREUSE    5 /* Data will be accessed once.  */
 206 # endif
 207 #endif
 208
 209
 210 #ifdef __USE_GNU
 211 /* Flags for SYNC_FILE_RANGE.  */
 212 # define SYNC_FILE_RANGE_WAIT_BEFORE    1 /* Wait upon writeout of all pages
 213                                              in the range before performing the
 214                                              write.  */
 215 # define SYNC_FILE_RANGE_WRITE          2 /* Initiate writeout of all those
 216                                              dirty pages in the range which are
 217                                              not presently under writeback.  */
 218 # define SYNC_FILE_RANGE_WAIT_AFTER     4 /* Wait upon writeout of all pages in
 219                                              the range after performing the
 220                                              write.  */
 221
 222 /* Flags for SPLICE and VMSPLICE.  */
 223 # define SPLICE_F_MOVE          1       /* Move pages instead of copying.  */
 224 # define SPLICE_F_NONBLOCK      2       /* Don't block on the pipe splicing
 225                                            (but we may still block on the fd
 226                                            we splice from/to).  */
 227 # define SPLICE_F_MORE          4       /* Expect more data.  */
 228 # define SPLICE_F_GIFT          8       /* Pages passed in are a gift.  */
 229 #endif
 230
 231 __BEGIN_DECLS
 232
 233 #ifdef __USE_GNU
 234
 235 /* Provide kernel hint to read ahead.  */
 236 extern ssize_t readahead (int __fd, __off64_t __offset, size_t __count)
 237     __THROW;
 238
 239
 240 /* Selective file content synch'ing.  */
 241 extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
 242                             unsigned int __flags);
 243
 244
 245 /* Splice address range into a pipe.  */
 246 extern ssize_t vmsplice (int __fdout, const struct iovec *__iov,
 247                          size_t __count, unsigned int __flags);
 248
 249 /* Splice two files together.  */
 250 extern ssize_t splice (int __fdin, __off64_t *__offin, int __fdout,
 251                        __off64_t *__offout, size_t __len,
 252                        unsigned int __flags);
 253
 254 /* In-kernel implementation of tee for pipe buffers.  */
 255 extern ssize_t tee (int __fdin, int __fdout, size_t __len,
 256                     unsigned int __flags);
 257
 258 #endif
 259
 260 __END_DECLS