static void
read_evms(void)
{
char line[100];
int ma, mi, sz;
FILE *procpt;
char uuid[16], *label, *devname;
char device[110];
dev_t dev;
struct stat statbuf;
procpt = fopen(PROC_EVMS_VOLUMES, "r");
if (!procpt)
return;
while (fgets(line, sizeof(line), procpt)) {
if (sscanf (line, " %d %d %d %*s %*s %[^\n ]",
&ma, &mi, &sz, device) != 4)
continue;
/*
* We first look for the device in the named location,
* but if we don't find it, or if the stat information
* doesn't check out, we use ext2fs_find_block_device
* to find it.
*/
dev = makedev(ma, mi);
if ((stat(device, &statbuf) < 0) || (statbuf.st_rdev != dev)) {
devname = ext2fs_find_block_device(dev);
} else
devname = string_copy(device);
if (!devname)
continue;
#ifdef DEBUG
printf("Checking partition %s (%d, %d)\n",
devname, ma, mi);
#endif
if (!get_label_uuid(devname, &label, uuid))
uuidcache_addentry(devname, label, uuid);
else
free(devname);
}
fclose(procpt);
}
int main(int argc, char** argv)
{
char *devname, *tmp;
int major, minor;
dev_t device;
const char *errmsg = "Cannot parse %s: %s\n";
if ((argc != 2) && (argc != 3)) {
fprintf(stderr, "Usage: %s device_number\n", argv[0]);
fprintf(stderr, "\t: %s major minor\n", argv[0]);
exit(1);
}
if (argc == 2) {
device = strtoul(argv[1], &tmp, 0);
if (*tmp) {
fprintf(stderr, errmsg, "device number", argv[1]);
exit(1);
}
} else {
major = strtoul(argv[1], &tmp, 0);
if (*tmp) {
fprintf(stderr, errmsg, "major number", argv[1]);
exit(1);
}
minor = strtoul(argv[2], &tmp, 0);
if (*tmp) {
fprintf(stderr, errmsg, "minor number", argv[2]);
exit(1);
}
device = makedev(major, minor);
printf("Looking for device 0x%04x (%d:%d)\n", device,
major, minor);
}
devname = ext2fs_find_block_device(device);
if (devname) {
printf("Found device! %s\n", devname);
free(devname);
} else {
printf("Cannot find device.\n");
}
return 0;
}
/*
* Remove an external journal from the filesystem
*/
static void remove_journal_device(ext2_filsys fs)
{
char *journal_path;
ext2_filsys jfs;
char buf[1024];
journal_superblock_t *jsb;
int i, nr_users;
errcode_t retval;
int commit_remove_journal = 0;
if (f_flag)
commit_remove_journal = 1; /* force removal even if error */
uuid_unparse(fs->super->s_journal_uuid, buf);
journal_path = get_spec_by_uuid(buf);
if (!journal_path) {
journal_path =
ext2fs_find_block_device(fs->super->s_journal_dev);
if (!journal_path)
return;
}
retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
EXT2_FLAG_JOURNAL_DEV_OK, 0,
fs->blocksize, unix_io_manager, &jfs);
if (retval) {
com_err(program_name, retval,
_("while trying to open external journal"));
goto no_valid_journal;
}
if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
fprintf(stderr, _("%s is not a journal device.\n"),
journal_path);
goto no_valid_journal;
}
/* Get the journal superblock */
if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) {
com_err(program_name, retval,
_("while reading journal superblock"));
goto no_valid_journal;
}
jsb = (journal_superblock_t *) buf;
if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
(jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
fprintf(stderr, _("Journal superblock not found!\n"));
goto no_valid_journal;
}
/* Find the filesystem UUID */
nr_users = ntohl(jsb->s_nr_users);
for (i=0; i < nr_users; i++) {
if (memcmp(fs->super->s_uuid,
&jsb->s_users[i*16], 16) == 0)
break;
}
if (i >= nr_users) {
fprintf(stderr,
_("Filesystem's UUID not found on journal device.\n"));
commit_remove_journal = 1;
goto no_valid_journal;
}
nr_users--;
for (i=0; i < nr_users; i++)
memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16);
jsb->s_nr_users = htonl(nr_users);
/* Write back the journal superblock */
if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) {
com_err(program_name, retval,
"while writing journal superblock.");
goto no_valid_journal;
}
commit_remove_journal = 1;
no_valid_journal:
if (commit_remove_journal == 0) {
fprintf(stderr, _("Journal NOT removed\n"));
exit(1);
}
fs->super->s_journal_dev = 0;
memset(fs->super->s_journal_uuid, 0,
sizeof(fs->super->s_journal_uuid));
ext2fs_mark_super_dirty(fs);
printf(_("Journal removed\n"));
free(journal_path);
}
/*
* Remove an external journal from the filesystem
*/
static void remove_journal_device(ext2_filsys fs)
{
char *journal_path;
ext2_filsys jfs;
char buf[1024];
journal_superblock_t *jsb;
int i, nr_users;
errcode_t retval;
int commit_remove_journal = 0;
io_manager io_ptr;
if (f_flag)
commit_remove_journal = 1; /* force removal even if error */
uuid_unparse(fs->super->s_journal_uuid, buf);
journal_path = blkid_get_devname(NULL, "UUID", buf);
if (!journal_path) {
journal_path =
ext2fs_find_block_device(fs->super->s_journal_dev);
if (!journal_path)
return;
}
io_ptr = unix_io_manager;
retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
EXT2_FLAG_JOURNAL_DEV_OK, 0,
fs->blocksize, io_ptr, &jfs);
if (retval) {
bb_error_msg("Failed to open external journal");
goto no_valid_journal;
}
if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
bb_error_msg("%s is not a journal device", journal_path);
goto no_valid_journal;
}
/* Get the journal superblock */
if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) {
bb_error_msg("Failed to read journal superblock");
goto no_valid_journal;
}
jsb = (journal_superblock_t *) buf;
if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
(jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
bb_error_msg("Journal superblock not found!");
goto no_valid_journal;
}
/* Find the filesystem UUID */
nr_users = ntohl(jsb->s_nr_users);
for (i=0; i < nr_users; i++) {
if (memcmp(fs->super->s_uuid,
&jsb->s_users[i*16], 16) == 0)
break;
}
if (i >= nr_users) {
bb_error_msg("Filesystem's UUID not found on journal device");
commit_remove_journal = 1;
goto no_valid_journal;
}
nr_users--;
for (i=0; i < nr_users; i++)
memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16);
jsb->s_nr_users = htonl(nr_users);
/* Write back the journal superblock */
if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) {
bb_error_msg("Failed to write journal superblock");
goto no_valid_journal;
}
commit_remove_journal = 1;
no_valid_journal:
if (commit_remove_journal == 0)
bb_error_msg_and_die("Journal NOT removed");
fs->super->s_journal_dev = 0;
uuid_clear(fs->super->s_journal_uuid);
ext2fs_mark_super_dirty(fs);
puts("Journal removed");
free(journal_path);
}
static void
read_partitions(void)
{
char line[100];
char *s;
int ma, mi, sz;
static char ptname[100];
FILE *procpt;
char uuid[16], *label, *devname;
char device[110];
dev_t dev;
struct stat statbuf;
int firstPass;
int handleOnFirst;
char *iobuf;
procpt = fopen(PROC_PARTITIONS, "r");
if (!procpt)
return;
iobuf = (char *)malloc(CBBUF);
if (iobuf)
setvbuf(procpt, iobuf, _IOFBF, CBBUF);
for (firstPass = 1; firstPass >= 0; firstPass--) {
fseek(procpt, 0, SEEK_SET);
while (fgets(line, sizeof(line), procpt)) {
if (sscanf (line, " %d %d %d %[^\n ]",
&ma, &mi, &sz, ptname) != 4)
continue;
/* skip extended partitions (heuristic: size 1) */
if (sz == 1)
continue;
/* look only at md devices on first pass */
handleOnFirst = !strncmp(ptname, "md", 2);
if (firstPass != handleOnFirst)
continue;
/* skip entire disk (minor 0, 64, ... on ide;
0, 16, ... on sd) */
/* heuristic: partition name ends in a digit */
/* OR partition name starts with 'lvm' */
for(s = ptname; *s; s++);
if (isdigit(s[-1]) || !strncmp(ptname, "lvm", 3)) {
/*
* We first look in /dev for the device, but
* if we don't find it, or if the stat
* information doesn't check out, we use
* ext2fs_find_block_device to find it.
*/
sprintf(device, "%s/%s", DEVLABELDIR, ptname);
dev = makedev(ma, mi);
if ((stat(device, &statbuf) < 0) ||
(statbuf.st_rdev != dev)) {
devname = ext2fs_find_block_device(dev);
} else
devname = string_copy(device);
if (!devname)
continue;
#ifdef DEBUG
printf("Checking partition %s (%d, %d)\n",
devname, ma, mi);
#endif
if (!get_label_uuid(devname, &label, uuid))
uuidcache_addentry(devname, label, uuid);
else
free(devname);
}
}
}
fclose(procpt);
if (iobuf)
free(iobuf);
}
