errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags,
char *mtpt, int mtlen)
{
errcode_t retval = 0;
if (getenv("EXT2FS_PRETEND_RO_MOUNT")) {
*mount_flags = EXT2_MF_MOUNTED | EXT2_MF_READONLY;
if (getenv("EXT2FS_PRETEND_ROOTFS"))
*mount_flags = EXT2_MF_ISROOT;
return 0;
}
if (getenv("EXT2FS_PRETEND_RW_MOUNT")) {
*mount_flags = EXT2_MF_MOUNTED;
if (getenv("EXT2FS_PRETEND_ROOTFS"))
*mount_flags = EXT2_MF_ISROOT;
return 0;
}
if (is_swap_device(device)) {
*mount_flags = EXT2_MF_MOUNTED | EXT2_MF_SWAP;
strncpy(mtpt, "<swap>", mtlen);
} else {
#ifdef HAVE_SETMNTENT
retval = check_mntent(device, mount_flags, mtpt, mtlen);
#else
#ifdef HAVE_GETMNTINFO
retval = check_getmntinfo(device, mount_flags, mtpt, mtlen);
#else
#ifdef __GNUC__
#warning "Can't use getmntent or getmntinfo to check for mounted filesystems!"
#endif
*mount_flags = 0;
#endif /* HAVE_GETMNTINFO */
#endif /* HAVE_SETMNTENT */
}
if (retval)
return retval;
#ifdef __linux__ /* This only works on Linux 2.6+ systems */
{
struct stat st_buf;
if (stat(device, &st_buf) == 0 && S_ISBLK(st_buf.st_mode)) {
int fd = open(device, O_RDONLY | O_EXCL);
if (fd >= 0)
close(fd);
else if (errno == EBUSY)
*mount_flags |= EXT2_MF_BUSY;
}
}
#endif
return 0;
}
errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags,
char *mtpt, int mtlen)
{
struct stat st_buf;
errcode_t retval = 0;
int fd;
if (is_swap_device(device)) {
*mount_flags = EXT2_MF_MOUNTED | EXT2_MF_SWAP;
strncpy(mtpt, "<swap>", mtlen);
} else {
#ifdef HAVE_SETMNTENT
retval = check_mntent(device, mount_flags, mtpt, mtlen);
#else
#ifdef HAVE_GETMNTINFO
retval = check_getmntinfo(device, mount_flags, mtpt, mtlen);
#else
#ifdef __GNUC__
#warning "Can't use getmntent or getmntinfo to check for mounted filesystems!"
#endif
*mount_flags = 0;
#endif /* HAVE_GETMNTINFO */
#endif /* HAVE_MNTENT_H */
}
if (retval)
return retval;
#ifdef __linux__ /* This only works on Linux 2.6+ systems */
if ((stat(device, &st_buf) != 0) ||
!S_ISBLK(st_buf.st_mode))
return 0;
fd = open(device, O_RDONLY | O_EXCL);
if (fd < 0) {
if (errno == EBUSY)
*mount_flags |= EXT2_MF_BUSY;
} else
close(fd);
#endif
return 0;
}
errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags,
char *mtpt, int mtlen)
{
if (is_swap_device(device)) {
*mount_flags = EXT2_MF_MOUNTED | EXT2_MF_SWAP;
strncpy(mtpt, "<swap>", mtlen);
return 0;
}
#ifdef HAVE_MNTENT_H
return check_mntent(device, mount_flags, mtpt, mtlen);
#else
#ifdef HAVE_GETMNTINFO
return check_getmntinfo(device, mount_flags, mtpt, mtlen);
#else
#ifdef __GNUC__
#warning "Can't use getmntent or getmntinfo to check for mounted filesystems!"
#endif
*mount_flags = 0;
return 0;
#endif /* HAVE_GETMNTINFO */
#endif /* HAVE_MNTENT_H */
}
