1997-04-26 17:58:21 +04:00
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/*
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1997-04-29 20:17:09 +04:00
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* ismounted.c --- Check to see if the filesystem was mounted
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1997-04-26 17:58:21 +04:00
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*
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1997-04-29 20:17:09 +04:00
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* Copyright (C) 1995 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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1997-04-26 17:58:21 +04:00
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*/
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#include <stdio.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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1998-02-20 08:33:14 +03:00
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#if HAVE_ERRNO_H
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#include <errno.h>
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#endif
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1997-04-26 17:58:21 +04:00
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#include <fcntl.h>
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#ifdef HAVE_LINUX_FD_H
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#include <linux/fd.h>
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#endif
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#ifdef HAVE_MNTENT_H
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#include <mntent.h>
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#endif
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#ifdef HAVE_GETMNTINFO
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#include <paths.h>
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#include <sys/param.h>
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#include <sys/mount.h>
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#endif /* HAVE_GETMNTINFO */
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Many files:
inode.c (ext2fs_open_inode_scan): Initialize the group variables
so that we don't need to call get_next_blockgroup() the first
time around. Saves a bit of time, and prevents us from
needing to assign -1 to current_group (which is an unsigned
value).
icount.c (insert_icount_el): Cast the estimated number of inodes
from a float to an ino_t.
alloc.c, alloc_tables.c, badlbocks.c, bb_compat.c, bb_inode.c,
bitmaps.c, bitops.c, block.c, bmap.c, bmove.c, brel_ma.c,
check_desc.c, closefs.c, cmp_bitmaps.c, dblist.c,
dblist_dir.c, dir_iterate.c, dirblock.c, dupfs.c, expanddir.c,
ext2fs.h, fileio.c, freefs.c, get_pathname.c, getsize.c,
icount.c, initialize.c, inline.c, inode.c, irel_ma.c,
ismounted.c, link.c, lookup.c, mkdir.c, namei.c, native.c,
newdir.c, openfs.c, read_bb.c, read_bb_file.c, rs_bitmap.c,
rw_bitmaps.c, swapfs.c, test_io.c, tst_badblocks.c,
tst_getsize.c, tst_iscan.c, unix_io.c, unlink.c, valid_blk.c,
version.c: If EXT2_FLAT_INCLUDES is defined, then assume all
of the ext2-specific header files are in a flat directory.
block.c, bmove.c, dirblock.c, fileio.c: Explicitly cast
all assignments from void * to be compatible with C++.
closefs.c (ext2fs_flush): Add a call to io_channel_flush() to
make sure the contents of the disk are flushed to disk.
dblist.c (ext2fs_add_dir_block): Change new to be new_entry to
avoid C++ namespace clash.
bitmaps.c (ext2fs_copy_bitmap): Change new to be new_map to
avoid C++ namespace clash.
ext2fs.h, bb_inode.c, block.c, bmove.c, brel.h, brel_ma.c,
irel.h, irel_ma.c, dblist.c, dblist_dir.c, dir_iterate.c,
ext2fsP.h, expanddir.c, get_pathname.c, inode.c, link.c,
unlink.c: Change private to be priv_data (to avoid C++
namespace clash)
1998-01-19 17:47:53 +03:00
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#if EXT2_FLAT_INCLUDES
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#include "ext2_fs.h"
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#else
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1997-04-26 17:58:21 +04:00
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#include <linux/ext2_fs.h>
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Many files:
inode.c (ext2fs_open_inode_scan): Initialize the group variables
so that we don't need to call get_next_blockgroup() the first
time around. Saves a bit of time, and prevents us from
needing to assign -1 to current_group (which is an unsigned
value).
icount.c (insert_icount_el): Cast the estimated number of inodes
from a float to an ino_t.
alloc.c, alloc_tables.c, badlbocks.c, bb_compat.c, bb_inode.c,
bitmaps.c, bitops.c, block.c, bmap.c, bmove.c, brel_ma.c,
check_desc.c, closefs.c, cmp_bitmaps.c, dblist.c,
dblist_dir.c, dir_iterate.c, dirblock.c, dupfs.c, expanddir.c,
ext2fs.h, fileio.c, freefs.c, get_pathname.c, getsize.c,
icount.c, initialize.c, inline.c, inode.c, irel_ma.c,
ismounted.c, link.c, lookup.c, mkdir.c, namei.c, native.c,
newdir.c, openfs.c, read_bb.c, read_bb_file.c, rs_bitmap.c,
rw_bitmaps.c, swapfs.c, test_io.c, tst_badblocks.c,
tst_getsize.c, tst_iscan.c, unix_io.c, unlink.c, valid_blk.c,
version.c: If EXT2_FLAT_INCLUDES is defined, then assume all
of the ext2-specific header files are in a flat directory.
block.c, bmove.c, dirblock.c, fileio.c: Explicitly cast
all assignments from void * to be compatible with C++.
closefs.c (ext2fs_flush): Add a call to io_channel_flush() to
make sure the contents of the disk are flushed to disk.
dblist.c (ext2fs_add_dir_block): Change new to be new_entry to
avoid C++ namespace clash.
bitmaps.c (ext2fs_copy_bitmap): Change new to be new_map to
avoid C++ namespace clash.
ext2fs.h, bb_inode.c, block.c, bmove.c, brel.h, brel_ma.c,
irel.h, irel_ma.c, dblist.c, dblist_dir.c, dir_iterate.c,
ext2fsP.h, expanddir.c, get_pathname.c, inode.c, link.c,
unlink.c: Change private to be priv_data (to avoid C++
namespace clash)
1998-01-19 17:47:53 +03:00
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#endif
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1997-04-26 17:58:21 +04:00
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#include "ext2fs.h"
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#ifdef HAVE_MNTENT_H
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/*
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* XXX we only check to see if the mount is readonly when it's the
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1997-04-26 18:25:20 +04:00
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* root filesystem.
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1997-04-26 17:58:21 +04:00
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*/
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static errcode_t check_mntent(const char *file, int *mount_flags)
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{
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FILE * f;
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struct mntent * mnt;
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int fd;
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*mount_flags = 0;
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if ((f = setmntent (MOUNTED, "r")) == NULL)
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return errno;
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while ((mnt = getmntent (f)) != NULL)
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if (strcmp(file, mnt->mnt_fsname) == 0)
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break;
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endmntent (f);
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if (mnt == 0)
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return 0;
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*mount_flags = EXT2_MF_MOUNTED;
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if (!strcmp(mnt->mnt_dir, "/")) {
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*mount_flags |= EXT2_MF_ISROOT;
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fd = open(MOUNTED, O_RDWR);
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if (fd < 0) {
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if (errno == EROFS)
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*mount_flags |= EXT2_MF_READONLY;
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} else
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close(fd);
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}
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return 0;
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}
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#endif
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#ifdef HAVE_GETMNTINFO
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static errcode_t check_getmntinfo(const char *file, int *mount_flags)
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{
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struct statfs *mp;
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int len, n;
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const char *s1;
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char *s2;
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n = getmntinfo(&mp, MNT_NOWAIT);
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if (n == 0)
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return errno;
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len = sizeof(_PATH_DEV) - 1;
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s1 = file;
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if (strncmp(_PATH_DEV, s1, len) == 0)
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s1 += len;
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*mount_flags = 0;
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while (--n >= 0) {
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s2 = mp->f_mntfromname;
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if (strncmp(_PATH_DEV, s2, len) == 0) {
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s2 += len - 1;
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*s2 = 'r';
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}
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if (strcmp(s1, s2) == 0 || strcmp(s1, &s2[1]) == 0) {
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*mount_flags = EXT2_MF_MOUNTED;
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break;
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}
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++mp;
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}
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return 0;
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}
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#endif /* HAVE_GETMNTINFO */
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/*
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* Is_mounted is set to 1 if the device is mounted, 0 otherwise
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*/
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Many files:
dosio.c: New file to do DOS/BIOS disk accesses.
namei.c (open_namei): Make pathlen be of type size_t.
llseek.c: Always #include stdlib.h since it's need to define
size_t.
io.h: Use errcode_t for magic numbers.
icount.c (get_icount_el), dupfs.c (ext2fs_dup_handle), dblist.c
(dir_block_cmp): Use size_t where appropriate.
read_bb.c (ext2fs_read_bb_inode), cmp_bitmaps.c
(ext2fs_compare_inode_bitmap): Use blk_t, ino_t and size_t
where appropriate.
closefs.c (ext2fs_flush): Use dgrp_t instead of int where
appropriate.
openfs.c (ext2fs_open), check_desc.c (ext2fs_check_desc): Use blk_t
instead of int where appropriate.
rw_bitmaps.c (read_bitmaps), irel_ma.c, inode.c (ext2fs_write_inode),
initialize.c (ext2fs_initialize): brel_ma.c: Fix to make be
16-bit safe.
link.c (ext2fs_link), unlink.c (ext2fs_unlink), lookup.c (lookup_proc),
ismounted.c (ext2fs_check_if_mounted), block.c (xlate_func):
Add #pragma argsused for Turbo C.
1997-08-12 00:29:22 +04:00
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#ifdef __TURBOC__
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#pragma argsused
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#endif
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1997-04-26 17:58:21 +04:00
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errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags)
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{
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#ifdef HAVE_MNTENT_H
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return check_mntent(file, mount_flags);
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#else
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#ifdef HAVE_GETMNTINFO
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return check_getmntinfo(file, mount_flags);
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#else
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*mount_flags = 0;
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return 0;
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#endif /* HAVE_GETMNTINFO */
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#endif /* HAVE_MNTENT_H */
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}
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