1997-04-26 17:58:21 +04:00
|
|
|
/*
|
1997-04-29 20:17:09 +04:00
|
|
|
* ismounted.c --- Check to see if the filesystem was mounted
|
1997-04-26 17:58:21 +04:00
|
|
|
*
|
1997-04-29 20:17:09 +04:00
|
|
|
* Copyright (C) 1995 Theodore Ts'o.
|
|
|
|
*
|
|
|
|
* %Begin-Header%
|
|
|
|
* This file may be redistributed under the terms of the GNU Public
|
|
|
|
* License.
|
|
|
|
* %End-Header%
|
1997-04-26 17:58:21 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
#if HAVE_UNISTD_H
|
|
|
|
#include <unistd.h>
|
|
|
|
#endif
|
|
|
|
#include <fcntl.h>
|
|
|
|
#ifdef HAVE_LINUX_FS_H
|
|
|
|
#include <linux/fs.h>
|
|
|
|
#endif
|
|
|
|
#ifdef HAVE_LINUX_FD_H
|
|
|
|
#include <linux/fd.h>
|
|
|
|
#endif
|
|
|
|
#ifdef HAVE_MNTENT_H
|
|
|
|
#include <mntent.h>
|
|
|
|
#endif
|
|
|
|
#ifdef HAVE_GETMNTINFO
|
|
|
|
#include <paths.h>
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <sys/mount.h>
|
|
|
|
#endif /* HAVE_GETMNTINFO */
|
|
|
|
|
|
|
|
#include <linux/ext2_fs.h>
|
|
|
|
#include "ext2fs.h"
|
|
|
|
|
|
|
|
#ifdef HAVE_MNTENT_H
|
|
|
|
/*
|
|
|
|
* XXX we only check to see if the mount is readonly when it's the
|
1997-04-26 18:25:20 +04:00
|
|
|
* root filesystem.
|
1997-04-26 17:58:21 +04:00
|
|
|
*/
|
|
|
|
static errcode_t check_mntent(const char *file, int *mount_flags)
|
|
|
|
{
|
|
|
|
FILE * f;
|
|
|
|
struct mntent * mnt;
|
|
|
|
int fd;
|
|
|
|
|
|
|
|
*mount_flags = 0;
|
|
|
|
if ((f = setmntent (MOUNTED, "r")) == NULL)
|
|
|
|
return errno;
|
|
|
|
while ((mnt = getmntent (f)) != NULL)
|
|
|
|
if (strcmp(file, mnt->mnt_fsname) == 0)
|
|
|
|
break;
|
|
|
|
endmntent (f);
|
|
|
|
if (mnt == 0)
|
|
|
|
return 0;
|
|
|
|
*mount_flags = EXT2_MF_MOUNTED;
|
|
|
|
|
|
|
|
if (!strcmp(mnt->mnt_dir, "/")) {
|
|
|
|
*mount_flags |= EXT2_MF_ISROOT;
|
|
|
|
fd = open(MOUNTED, O_RDWR);
|
|
|
|
if (fd < 0) {
|
|
|
|
if (errno == EROFS)
|
|
|
|
*mount_flags |= EXT2_MF_READONLY;
|
|
|
|
} else
|
|
|
|
close(fd);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef HAVE_GETMNTINFO
|
|
|
|
static errcode_t check_getmntinfo(const char *file, int *mount_flags)
|
|
|
|
{
|
|
|
|
struct statfs *mp;
|
|
|
|
int len, n;
|
|
|
|
const char *s1;
|
|
|
|
char *s2;
|
|
|
|
|
|
|
|
n = getmntinfo(&mp, MNT_NOWAIT);
|
|
|
|
if (n == 0)
|
|
|
|
return errno;
|
|
|
|
|
|
|
|
len = sizeof(_PATH_DEV) - 1;
|
|
|
|
s1 = file;
|
|
|
|
if (strncmp(_PATH_DEV, s1, len) == 0)
|
|
|
|
s1 += len;
|
|
|
|
|
|
|
|
*mount_flags = 0;
|
|
|
|
while (--n >= 0) {
|
|
|
|
s2 = mp->f_mntfromname;
|
|
|
|
if (strncmp(_PATH_DEV, s2, len) == 0) {
|
|
|
|
s2 += len - 1;
|
|
|
|
*s2 = 'r';
|
|
|
|
}
|
|
|
|
if (strcmp(s1, s2) == 0 || strcmp(s1, &s2[1]) == 0) {
|
|
|
|
*mount_flags = EXT2_MF_MOUNTED;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
++mp;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif /* HAVE_GETMNTINFO */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Is_mounted is set to 1 if the device is mounted, 0 otherwise
|
|
|
|
*/
|
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
|
|
|
#ifdef __TURBOC__
|
|
|
|
#pragma argsused
|
|
|
|
#endif
|
1997-04-26 17:58:21 +04:00
|
|
|
errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags)
|
|
|
|
{
|
|
|
|
#ifdef HAVE_MNTENT_H
|
|
|
|
return check_mntent(file, mount_flags);
|
|
|
|
#else
|
|
|
|
#ifdef HAVE_GETMNTINFO
|
|
|
|
return check_getmntinfo(file, mount_flags);
|
|
|
|
#else
|
|
|
|
*mount_flags = 0;
|
|
|
|
return 0;
|
|
|
|
#endif /* HAVE_GETMNTINFO */
|
|
|
|
#endif /* HAVE_MNTENT_H */
|
|
|
|
}
|