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glibc  2.9
mount.h
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00001 /* Header file for mounting/unmount Linux filesystems.
00002    Copyright (C) 1996,1997,1998,1999,2000,2004 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 /* This is taken from /usr/include/linux/fs.h.  */
00021 
00022 #ifndef _SYS_MOUNT_H
00023 #define _SYS_MOUNT_H 1
00024 
00025 #include <features.h>
00026 #include <sys/ioctl.h>
00027 
00028 #define BLOCK_SIZE   1024
00029 #define BLOCK_SIZE_BITS     10
00030 
00031 
00032 /* These are the fs-independent mount-flags: up to 16 flags are
00033    supported  */
00034 enum
00035 {
00036   MS_RDONLY = 1,            /* Mount read-only.  */
00037 #define MS_RDONLY    MS_RDONLY
00038   MS_NOSUID = 2,            /* Ignore suid and sgid bits.  */
00039 #define MS_NOSUID    MS_NOSUID
00040   MS_NODEV = 4,                    /* Disallow access to device special files.  */
00041 #define MS_NODEV     MS_NODEV
00042   MS_NOEXEC = 8,            /* Disallow program execution.  */
00043 #define MS_NOEXEC    MS_NOEXEC
00044   MS_SYNCHRONOUS = 16,             /* Writes are synced at once.  */
00045 #define MS_SYNCHRONOUS      MS_SYNCHRONOUS
00046   MS_REMOUNT = 32,          /* Alter flags of a mounted FS.  */
00047 #define MS_REMOUNT   MS_REMOUNT
00048   MS_MANDLOCK = 64,         /* Allow mandatory locks on an FS.  */
00049 #define MS_MANDLOCK  MS_MANDLOCK
00050   S_WRITE = 128,            /* Write on file/directory/symlink.  */
00051 #define S_WRITE             S_WRITE
00052   S_APPEND = 256,           /* Append-only file.  */
00053 #define S_APPEND     S_APPEND
00054   S_IMMUTABLE = 512,        /* Immutable file.  */
00055 #define S_IMMUTABLE  S_IMMUTABLE
00056   MS_NOATIME = 1024,        /* Do not update access times.  */
00057 #define MS_NOATIME   MS_NOATIME
00058   MS_NODIRATIME = 2048,            /* Do not update directory access times.  */
00059 #define MS_NODIRATIME       MS_NODIRATIME
00060   MS_BIND = 4096,           /* Bind directory at different place.  */
00061 #define MS_BIND             MS_BIND
00062 };
00063 
00064 /* Flags that can be altered by MS_REMOUNT  */
00065 #define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_NOATIME \
00066                    |MS_NODIRATIME)
00067 
00068 
00069 /* Magic mount flag number. Has to be or-ed to the flag values.  */
00070 
00071 #define MS_MGC_VAL 0xc0ed0000      /* Magic flag number to indicate "new" flags */
00072 #define MS_MGC_MSK 0xffff0000      /* Magic flag number mask */
00073 
00074 
00075 /* The read-only stuff doesn't really belong here, but any other place
00076    is probably as bad and I don't want to create yet another include
00077    file.  */
00078 
00079 #define BLKROSET   _IO(0x12, 93) /* Set device read-only (0 = read-write).  */
00080 #define BLKROGET   _IO(0x12, 94) /* Get read-only status (0 = read_write).  */
00081 #define BLKRRPART  _IO(0x12, 95) /* Re-read partition table.  */
00082 #define BLKGETSIZE _IO(0x12, 96) /* Return device size.  */
00083 #define BLKFLSBUF  _IO(0x12, 97) /* Flush buffer cache.  */
00084 #define BLKRASET   _IO(0x12, 98) /* Set read ahead for block device.  */
00085 #define BLKRAGET   _IO(0x12, 99) /* Get current read ahead setting.  */
00086 #define BLKFRASET  _IO(0x12,100) /* Set filesystem read-ahead.  */
00087 #define BLKFRAGET  _IO(0x12,101) /* Get filesystem read-ahead.  */
00088 #define BLKSECTSET _IO(0x12,102) /* Set max sectors per request.  */
00089 #define BLKSECTGET _IO(0x12,103) /* Get max sectors per request.  */
00090 #define BLKSSZGET  _IO(0x12,104) /* Get block device sector size.  */
00091 #define BLKBSZGET  _IOR(0x12,112,size_t)
00092 #define BLKBSZSET  _IOW(0x12,113,size_t)
00093 #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size.  */
00094 
00095 
00096 /* Possible value for FLAGS parameter of `umount2'.  */
00097 enum
00098 {
00099   MNT_FORCE = 1                    /* Force unmounting.  */
00100 #define MNT_FORCE MNT_FORCE
00101 };
00102 
00103 
00104 __BEGIN_DECLS
00105 
00106 /* Mount a filesystem.  */
00107 extern int mount (__const char *__special_file, __const char *__dir,
00108                 __const char *__fstype, unsigned long int __rwflag,
00109                 __const void *__data) __THROW;
00110 
00111 /* Unmount a filesystem.  */
00112 extern int umount (__const char *__special_file) __THROW;
00113 
00114 /* Unmount a filesystem.  Force unmounting if FLAGS is set to MNT_FORCE.  */
00115 extern int umount2 (__const char *__special_file, int __flags) __THROW;
00116 
00117 __END_DECLS
00118 
00119 #endif /* _SYS_MOUNT_H */