sysdeps/unix/sysv/linux/sys/mount.h

   1 /* Header file for mounting/unmount Linux filesystems.
   2    Copyright (C) 1996, 1997, 1998, 1999 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 /* This is taken from /usr/include/linux/fs.h.  */
  21
  22 #ifndef _SYS_MOUNT_H
  23 #define _SYS_MOUNT_H    1
  24
  25 #include <features.h>
  26 #include <sys/ioctl.h>
  27
  28 #define BLOCK_SIZE      1024
  29 #define BLOCK_SIZE_BITS 10
  30
  31
  32 /* These are the fs-independent mount-flags: up to 16 flags are
  33    supported  */
  34 enum
  35 {
  36   MS_RDONLY = 1,                /* Mount read-only.  */
  37 #define MS_RDONLY       MS_RDONLY
  38   MS_NOSUID = 2,                /* Ignore suid and sgid bits.  */
  39 #define MS_NOSUID       MS_NOSUID
  40   MS_NODEV = 4,                 /* Disallow access to device special files.  */
  41 #define MS_NODEV        MS_NODEV
  42   MS_NOEXEC = 8,                /* Disallow program execution.  */
  43 #define MS_NOEXEC       MS_NOEXEC
  44   MS_SYNCHRONOUS = 16,          /* Writes are synced at once.  */
  45 #define MS_SYNCHRONOUS  MS_SYNCHRONOUS
  46   MS_REMOUNT = 32,              /* Alter flags of a mounted FS.  */
  47 #define MS_REMOUNT      MS_REMOUNT
  48   MS_MANDLOCK = 64,             /* Allow mandatory locks on an FS.  */
  49 #define MS_MANDLOCK     MS_MANDLOCK
  50   S_WRITE = 128,                /* Write on file/directory/symlink.  */
  51 #define S_WRITE         S_WRITE
  52   S_APPEND = 256,               /* Append-only file.  */
  53 #define S_APPEND        S_APPEND
  54   S_IMMUTABLE = 512,            /* Immutable file.  */
  55 #define S_IMMUTABLE     S_IMMUTABLE
  56   MS_NOATIME = 1024,            /* Do not update access times.  */
  57 #define MS_NOATIME      MS_NOATIME
  58   MS_NODIRATIME = 2048          /* Do not update directory access times.  */
  59 #define MS_NODIRATIME   MS_NODIRATIME
  60 };
  61
  62 /* Flags that can be altered by MS_REMOUNT  */
  63 #define MS_RMT_MASK (MS_RDONLY | MS_MANDLOCK)
  64
  65
  66 /* Magic mount flag number. Has to be or-ed to the flag values.  */
  67
  68 #define MS_MGC_VAL 0xc0ed0000   /* Magic flag number to indicate "new" flags */
  69 #define MS_MGC_MSK 0xffff0000   /* Magic flag number mask */
  70
  71
  72 /* The read-only stuff doesn't really belong here, but any other place
  73    is probably as bad and I don't want to create yet another include
  74    file.  */
  75
  76 #define BLKROSET   _IO(0x12, 93) /* Set device read-only (0 = read-write).  */
  77 #define BLKROGET   _IO(0x12, 94) /* Get read-only status (0 = read_write).  */
  78 #define BLKRRPART  _IO(0x12, 95) /* Re-read partition table.  */
  79 #define BLKGETSIZE _IO(0x12, 96) /* Return device size.  */
  80 #define BLKFLSBUF  _IO(0x12, 97) /* Flush buffer cache.  */
  81 #define BLKRASET   _IO(0x12, 98) /* Set read ahead for block device.  */
  82 #define BLKRAGET   _IO(0x12, 99) /* Get current read ahead setting.  */
  83
  84
  85 /* Possible value for FLAGS parameter of `umount2'.  */
  86 enum
  87 {
  88   MNT_FORCE = 1                 /* Force unmounting.  */
  89 #define MNT_FORCE MNT_FORCE
  90 };
  91
  92
  93 __BEGIN_DECLS
  94
  95 /* Mount a filesystem.  */
  96 extern int mount (__const char *__special_file, __const char *__dir,
  97                   __const char *__fstype, unsigned long int __rwflag,
  98                   __const void *__data) __THROW;
  99
 100 /* Unmount a filesystem.  */
 101 extern int umount (__const char *__special_file) __THROW;
 102
 103 /* Unmount a filesystem.  Force unmounting if FLAGS is set to MNT_FORCE.  */
 104 extern int umount2 (__const char *__special_file, int __flags) __THROW;
 105
 106 __END_DECLS
 107
 108 #endif /* _SYS_MOUNT_H */