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mount.h
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/* Header file for mounting/unmount Linux filesystems. Copyright (C) 1996-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ /* This is taken from /usr/include/linux/fs.h. */ #ifndef _SYS_MOUNT_H #define _SYS_MOUNT_H 1 #include <features.h> #include <sys/ioctl.h> #define BLOCK_SIZE 1024 #define BLOCK_SIZE_BITS 10 /* These are the fs-independent mount-flags: up to 16 flags are supported */ enum { MS_RDONLY = 1, /* Mount read-only. */ #define MS_RDONLY MS_RDONLY MS_NOSUID = 2, /* Ignore suid and sgid bits. */ #define MS_NOSUID MS_NOSUID MS_NODEV = 4, /* Disallow access to device special files. */ #define MS_NODEV MS_NODEV MS_NOEXEC = 8, /* Disallow program execution. */ #define MS_NOEXEC MS_NOEXEC MS_SYNCHRONOUS = 16, /* Writes are synced at once. */ #define MS_SYNCHRONOUS MS_SYNCHRONOUS MS_REMOUNT = 32, /* Alter flags of a mounted FS. */ #define MS_REMOUNT MS_REMOUNT MS_MANDLOCK = 64, /* Allow mandatory locks on an FS. */ #define MS_MANDLOCK MS_MANDLOCK MS_DIRSYNC = 128, /* Directory modifications are synchronous. */ #define MS_DIRSYNC MS_DIRSYNC MS_NOATIME = 1024, /* Do not update access times. */ #define MS_NOATIME MS_NOATIME MS_NODIRATIME = 2048, /* Do not update directory access times. */ #define MS_NODIRATIME MS_NODIRATIME MS_BIND = 4096, /* Bind directory at different place. */ #define MS_BIND MS_BIND MS_MOVE = 8192, #define MS_MOVE MS_MOVE MS_REC = 16384, #define MS_REC MS_REC MS_SILENT = 32768, #define MS_SILENT MS_SILENT MS_POSIXACL = 1 << 16, /* VFS does not apply the umask. */ #define MS_POSIXACL MS_POSIXACL MS_UNBINDABLE = 1 << 17, /* Change to unbindable. */ #define MS_UNBINDABLE MS_UNBINDABLE MS_PRIVATE = 1 << 18, /* Change to private. */ #define MS_PRIVATE MS_PRIVATE MS_SLAVE = 1 << 19, /* Change to slave. */ #define MS_SLAVE MS_SLAVE MS_SHARED = 1 << 20, /* Change to shared. */ #define MS_SHARED MS_SHARED MS_RELATIME = 1 << 21, /* Update atime relative to mtime/ctime. */ #define MS_RELATIME MS_RELATIME MS_KERNMOUNT = 1 << 22, /* This is a kern_mount call. */ #define MS_KERNMOUNT MS_KERNMOUNT MS_I_VERSION = 1 << 23, /* Update inode I_version field. */ #define MS_I_VERSION MS_I_VERSION MS_STRICTATIME = 1 << 24, /* Always perform atime updates. */ #define MS_STRICTATIME MS_STRICTATIME MS_LAZYTIME = 1 << 25, /* Update the on-disk [acm]times lazily. */ #define MS_LAZYTIME MS_LAZYTIME MS_ACTIVE = 1 << 30, #define MS_ACTIVE MS_ACTIVE MS_NOUSER = 1 << 31 #define MS_NOUSER MS_NOUSER }; /* Flags that can be altered by MS_REMOUNT */ #define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION \ |MS_LAZYTIME) /* Magic mount flag number. Has to be or-ed to the flag values. */ #define MS_MGC_VAL 0xc0ed0000 /* Magic flag number to indicate "new" flags */ #define MS_MGC_MSK 0xffff0000 /* Magic flag number mask */ /* The read-only stuff doesn't really belong here, but any other place is probably as bad and I don't want to create yet another include file. */ #define BLKROSET _IO(0x12, 93) /* Set device read-only (0 = read-write). */ #define BLKROGET _IO(0x12, 94) /* Get read-only status (0 = read_write). */ #define BLKRRPART _IO(0x12, 95) /* Re-read partition table. */ #define BLKGETSIZE _IO(0x12, 96) /* Return device size. */ #define BLKFLSBUF _IO(0x12, 97) /* Flush buffer cache. */ #define BLKRASET _IO(0x12, 98) /* Set read ahead for block device. */ #define BLKRAGET _IO(0x12, 99) /* Get current read ahead setting. */ #define BLKFRASET _IO(0x12,100) /* Set filesystem read-ahead. */ #define BLKFRAGET _IO(0x12,101) /* Get filesystem read-ahead. */ #define BLKSECTSET _IO(0x12,102) /* Set max sectors per request. */ #define BLKSECTGET _IO(0x12,103) /* Get max sectors per request. */ #define BLKSSZGET _IO(0x12,104) /* Get block device sector size. */ #define BLKBSZGET _IOR(0x12,112,size_t) #define BLKBSZSET _IOW(0x12,113,size_t) #define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size. */ /* Possible value for FLAGS parameter of `umount2'. */ enum { MNT_FORCE = 1, /* Force unmounting. */ #define MNT_FORCE MNT_FORCE MNT_DETACH = 2, /* Just detach from the tree. */ #define MNT_DETACH MNT_DETACH MNT_EXPIRE = 4, /* Mark for expiry. */ #define MNT_EXPIRE MNT_EXPIRE UMOUNT_NOFOLLOW = 8 /* Don't follow symlink on umount. */ #define UMOUNT_NOFOLLOW UMOUNT_NOFOLLOW }; __BEGIN_DECLS /* Mount a filesystem. */ extern int mount (const char *__special_file, const char *__dir, const char *__fstype, unsigned long int __rwflag, const void *__data) __THROW; /* Unmount a filesystem. */ extern int umount (const char *__special_file) __THROW; /* Unmount a filesystem. Force unmounting if FLAGS is set to MNT_FORCE. */ extern int umount2 (const char *__special_file, int __flags) __THROW; __END_DECLS #endif /* _SYS_MOUNT_H */
