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

   1 /* O_*, F_*, FD_* bit values for Linux.
   2    Copyright (C) 1995, 1996, 1997 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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 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 /* In GNU, read and write are bits (unlike BSD).  */
  29 #ifdef __USE_GNU
  30 # define O_READ         O_RDONLY /* Open for reading.  */
  31 # define O_WRITE        O_WRONLY /* Open for writing.  */
  32 #endif
  33 /* open/fcntl - O_SYNC is only implemented on blocks devices and on files
  34    located on an ext2 file system */
  35 #define O_ACCMODE         0003
  36 #define O_RDONLY            00
  37 #define O_WRONLY            01
  38 #define O_RDWR              02
  39 #define O_CREAT          01000  /* not fcntl */
  40 #define O_TRUNC          02000  /* not fcntl */
  41 #define O_EXCL           04000  /* not fcntl */
  42 #define O_NOCTTY        010000  /* not fcntl */
  43
  44 #define O_NONBLOCK       00004
  45 #define O_APPEND         00010
  46 #define O_NDELAY        O_NONBLOCK
  47 #define O_SYNC          040000
  48 #define O_FSYNC         O_SYNC
  49 #define O_ASYNC         020000  /* fcntl, for BSD compatibility */
  50
  51 /* XXX missing */
  52 #define O_LARGEFILE     0
  53
  54 /* Values for the second argument to `fcntl'.  */
  55 #define F_DUPFD         0       /* Duplicate file descriptor.  */
  56 #define F_GETFD         1       /* Get file descriptor flags.  */
  57 #define F_SETFD         2       /* Set file descriptor flags.  */
  58 #define F_GETFL         3       /* Get file status flags.  */
  59 #define F_SETFL         4       /* Set file status flags.  */
  60 #define F_GETLK         7       /* Get record locking info.  */
  61 #define F_SETLK         8       /* Set record locking info (non-blocking).  */
  62 #define F_SETLKW        9       /* Set record locking info (blocking).  */
  63
  64 /* XXX missing */
  65 #define F_GETLK64       7       /* Get record locking info.  */
  66 #define F_SETLK64       8       /* Set record locking info (non-blocking).  */
  67 #define F_SETLKW64      9       /* Set record locking info (blocking).  */
  68
  69 #ifdef __USE_BSD
  70 # define F_SETOWN       5       /* Get owner of socket (receiver of SIGIO).  */
  71 # define F_GETOWN       6       /* Set owner of socket (receiver of SIGIO).  */
  72 #endif
  73
  74 /* for F_[GET|SET]FL */
  75 #define FD_CLOEXEC      1       /* actually anything with low bit set goes */
  76
  77 /* For posix fcntl() and `l_type' field of a `struct flock' for lockf() */
  78 #define F_RDLCK         1       /* Read lock.  */
  79 #define F_WRLCK         2       /* Write lock.  */
  80 #define F_UNLCK         8       /* Remove lock.  */
  81
  82 /* for old implementation of bsd flock () */
  83 #define F_EXLCK         16      /* or 3 */
  84 #define F_SHLCK         32      /* or 4 */
  85
  86 /* operations for bsd flock(), also used by the kernel implementation */
  87 #define LOCK_SH         1       /* shared lock */
  88 #define LOCK_EX         2       /* exclusive lock */
  89 #define LOCK_NB         4       /* or'd with one of the above to prevent
  90                                    blocking */
  91 #define LOCK_UN         8       /* remove lock */
  92
  93 /* We don't need to support __USE_FILE_OFFSET64.  */
  94 struct flock
  95   {
  96     short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
  97     short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
  98     __off_t l_start;    /* Offset where the lock begins.  */
  99     __off_t l_len;      /* Size of the locked area; zero means until EOF.  */
 100     __pid_t l_pid;      /* Process holding the lock.  */
 101   };
 102
 103 #ifdef __USE_LARGEFILE64
 104 struct flock64
 105   {
 106     short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
 107     short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
 108     __off64_t l_start;  /* Offset where the lock begins.  */
 109     __off64_t l_len;    /* Size of the locked area; zero means until EOF.  */
 110     __pid_t l_pid;      /* Process holding the lock.  */
 111   };
 112 #endif
 113
 114
 115 /* Define some more compatibility macros to be backward compatible with
 116    BSD systems which did not managed to hide these kernel macros.  */
 117 #ifdef  __USE_BSD
 118 # define FAPPEND                O_APPEND
 119 # define FFSYNC         O_FSYNC
 120 # define FASYNC         O_ASYNC
 121 # define FNONBLOCK      O_NONBLOCK
 122 # define FNDELAY                O_NDELAY
 123 #endif /* Use BSD.  */