sysdeps/unix/bsd/bits/fcntl.h

   1 /* O_*, F_*, FD_* bit values for 4.3 BSD.
   2    Copyright (C) 1991, 1992, 1997, 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _FCNTL_H
  20 # error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
  21 #endif
  22
  23
  24 /* File access modes for `open' and `fcntl'.  */
  25 #define O_RDONLY        0       /* Open read-only.  */
  26 #define O_WRONLY        1       /* Open write-only.  */
  27 #define O_RDWR          2       /* Open read/write.  */
  28
  29
  30 /* Bits OR'd into the second argument to open.  */
  31 #define O_CREAT         0x0200  /* Create file if it doesn't exist.  */
  32 #define O_EXCL          0x0800  /* Fail if file already exists.  */
  33 #define O_TRUNC         0x0400  /* Truncate file to zero length.  */
  34 /* Apparently not assigning a controlling terminal is the default
  35    behavior in BSD, so no bit is required to request that behavior.  */
  36 #define O_NOCTTY        0       /* Don't assign a controlling terminal.  */
  37 #if defined __USE_BSD || defined __USE_SVID
  38 # define O_ASYNC                0x0040  /* Send SIGIO to owner when data is ready.  */
  39 # define O_FSYNC                0x2000  /* Synchronous writes.  */
  40 # define O_SYNC         O_FSYNC
  41 #endif
  42
  43 /* File status flags for `open' and `fcntl'.  */
  44 #define O_APPEND        0x0008  /* Writes append to the file.  */
  45 #define O_NONBLOCK      0x0004  /* Non-blocking I/O.  */
  46
  47 #ifdef __USE_BSD
  48 /* BSD before 4.4 doesn't support POSIX.1 O_NONBLOCK,
  49    but O_NDELAY is close.  */
  50 # define O_NDELAY       O_NONBLOCK
  51 #endif
  52
  53 #ifdef __USE_BSD
  54 /* Bits in the file status flags returned by F_GETFL.
  55    These are all the O_* flags, plus FREAD and FWRITE, which are
  56    independent bits set by which of O_RDONLY, O_WRONLY, and O_RDWR, was
  57    given to `open'.  */
  58 # define FREAD          1
  59 # define FWRITE         2
  60
  61 /* Traditional BSD names the O_* bits.  */
  62 # define FASYNC         O_ASYNC
  63 # define FCREAT         O_CREAT
  64 # define FEXCL          O_EXCL
  65 # define FTRUNC         O_TRUNC
  66 # define FNOCTTY        O_NOCTTY
  67 # define FFSYNC         O_FSYNC
  68 # define FSYNC          O_SYNC
  69 # define FAPPEND        O_APPEND
  70 # define FNONBLOCK      O_NONBLOCK
  71 # define FNDELAY        O_NDELAY
  72 #endif
  73
  74 /* Mask for file access modes.  This is system-dependent in case
  75    some system ever wants to define some other flavor of access.  */
  76 #define O_ACCMODE       (O_RDONLY|O_WRONLY|O_RDWR)
  77
  78 /* XXX missing */
  79 #define O_LARGEFILE     0
  80
  81 /* Values for the second argument to `fcntl'.  */
  82 #define F_DUPFD         0       /* Duplicate file descriptor.  */
  83 #define F_GETFD         1       /* Get file descriptor flags.  */
  84 #define F_SETFD         2       /* Set file descriptor flags.  */
  85 #define F_GETFL         3       /* Get file status flags.  */
  86 #define F_SETFL         4       /* Set file status flags.  */
  87 #if defined __USE_BSD || defined __USE_UNIX98
  88 # define F_GETOWN       5       /* Get owner (receiver of SIGIO).  */
  89 # define F_SETOWN       6       /* Set owner (receiver of SIGIO).  */
  90 #endif
  91 #define F_GETLK         7       /* Get record locking info.  */
  92 #define F_SETLK         8       /* Set record locking info (non-blocking).  */
  93 #define F_SETLKW        9       /* Set record locking info (blocking).  */
  94
  95 /* XXX missing */
  96 #define F_GETLK64       7       /* Get record locking info.  */
  97 #define F_SETLK64       8       /* Set record locking info (non-blocking).  */
  98 #define F_SETLKW64      9       /* Set record locking info (blocking).  */
  99
 100 /* File descriptor flags used with F_GETFD and F_SETFD.  */
 101 #define FD_CLOEXEC      1       /* Close on exec.  */
 102
 103
 104 #include <bits/types.h>
 105
 106 /* The structure describing an advisory lock.  This is the type of the third
 107    argument to `fcntl' for the F_GETLK, F_SETLK, and F_SETLKW requests.  */
 108 struct flock
 109   {
 110     short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
 111     short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
 112 #ifndef __USE_FILE_OFFSET64
 113     __off_t l_start;    /* Offset where the lock begins.  */
 114     __off_t l_len;      /* Size of the locked area; zero means until EOF.  */
 115 #else
 116     __off64_t l_start;  /* Offset where the lock begins.  */
 117     __off64_t l_len;    /* Size of the locked area; zero means until EOF.  */
 118 #endif
 119     short int l_pid;    /* Process holding the lock.  */
 120     short int l_xxx;    /* Reserved for future use.  */
 121   };
 122
 123 #ifdef __USE_LARGEFILE64
 124 struct flock64
 125   {
 126     short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
 127     short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
 128     __off64_t l_start;  /* Offset where the lock begins.  */
 129     __off64_t l_len;    /* Size of the locked area; zero means until EOF.  */
 130     short int l_pid;    /* Process holding the lock.  */
 131     short int l_xxx;    /* Reserved for future use.  */
 132   };
 133 #endif
 134
 135 /* Values for the `l_type' field of a `struct flock'.  */
 136 #define F_RDLCK 1       /* Read lock.  */
 137 #define F_WRLCK 2       /* Write lock.  */
 138 #define F_UNLCK 3       /* Remove lock.  */