static int check_partition_table(const char *device)
{
blkid_probe pr;
const char *value;
int ret;
pr = blkid_new_probe_from_filename(device);
if (!pr)
return -1;
ret = blkid_probe_enable_partitions(pr, 1);
if (ret < 0)
goto errout;
ret = blkid_probe_enable_superblocks(pr, 0);
if (ret < 0)
goto errout;
ret = blkid_do_fullprobe(pr);
if (ret < 0)
goto errout;
ret = blkid_probe_lookup_value(pr, "PTTYPE", &value, NULL);
if (ret == 0)
fprintf(stderr, _("Found a %s partition table in %s\n"),
value, device);
else
ret = 1;
errout:
blkid_free_probe(pr);
return ret;
}
static int probe_superblocks(blkid_probe pr)
{
struct stat st;
int rc;
if (fstat(blkid_probe_get_fd(pr), &st))
return -1;
blkid_probe_enable_partitions(pr, 1);
if (!S_ISCHR(st.st_mode) &&
blkid_probe_get_size(pr) <= 1024 * 1440 &&
blkid_probe_is_wholedisk(pr)) {
/*
* check if the small disk is partitioned, if yes then
* don't probe for filesystems.
*/
blkid_probe_enable_superblocks(pr, 0);
rc = blkid_do_fullprobe(pr);
if (rc < 0)
return rc; /* -1 = error, 1 = nothing, 0 = success */
if (blkid_probe_lookup_value(pr, "PTTYPE", NULL, NULL) == 0)
return 0; /* partition table detected */
}
blkid_probe_set_partitions_flags(pr, BLKID_PARTS_ENTRY_DETAILS);
blkid_probe_enable_superblocks(pr, 1);
return blkid_do_safeprobe(pr);
}
int main(int argc, char *argv[])
{
int rc;
char *devname;
blkid_probe pr;
blkid_topology tp;
if (argc < 2) {
fprintf(stderr, "usage: %s <device> "
"-- checks based on libblkid for mkfs-like programs.\n",
program_invocation_short_name);
return EXIT_FAILURE;
}
devname = argv[1];
pr = blkid_new_probe_from_filename(devname);
if (!pr)
err(EXIT_FAILURE, "%s: faild to create a new libblkid probe",
devname);
/*
* check Filesystems / Partitions overwrite
*/
/* enable partitions probing (superblocks are enabled by default) */
blkid_probe_enable_partitions(pr, TRUE);
rc = blkid_do_fullprobe(pr);
if (rc == -1)
errx(EXIT_FAILURE, "%s: blkid_do_fullprobe() failed", devname);
else if (rc == 0) {
const char *type;
if (!blkid_probe_lookup_value(pr, "TYPE", &type, NULL))
errx(EXIT_FAILURE, "%s: appears to contain an existing "
"%s superblock", devname, type);
if (!blkid_probe_lookup_value(pr, "PTTYPE", &type, NULL))
errx(EXIT_FAILURE, "%s: appears to contain an partition "
"table (%s)", devname, type);
}
/*
* get topology details
*/
tp = blkid_probe_get_topology(pr);
if (!tp)
errx(EXIT_FAILURE, "%s: failed to read topology", devname);
/* ... your mkfs.<type> code or so ...
off = blkid_topology_get_alignment_offset(tp);
*/
blkid_free_probe(pr);
return EXIT_SUCCESS;
}
gboolean type_by_device(const gchar* device, gchar** type) {
gboolean result = false;
const char *devtype = NULL;
blkid_probe probe = NULL;
*type = NULL;
probe = blkid_new_probe_from_filename(device);
if(!probe) {
LOG(MOD "Probe from filename failed!\n");
return false;
}
if (blkid_probe_enable_partitions(probe, true) != 0) {
LOG(MOD "Enable partitions failed!\n");
goto fail;
}
if (blkid_do_fullprobe(probe) != 0) {
LOG(MOD "Fullprobe failed!\n");
goto fail;
}
if (blkid_probe_lookup_value(probe, "TYPE", &devtype, NULL) != 0) {
LOG(MOD "Lookup value failed!\n");
goto fail;
}
*type = g_strdup(devtype);
result = true;
fail:
blkid_free_probe(probe);
return result;
}
static int lowprobe_topology(blkid_probe pr)
{
/* enable topology probing only */
blkid_probe_enable_topology(pr, 1);
blkid_probe_enable_superblocks(pr, 0);
blkid_probe_enable_partitions(pr, 0);
return blkid_do_fullprobe(pr);
}
static lgfs2_rgrps_t rgrps_init(struct gfs2_sbd *sdp)
{
int ret;
int error;
uint64_t al_base = 0;
uint64_t al_off = 0;
struct stat st;
blkid_probe pr = blkid_new_probe();
if (pr == NULL || blkid_probe_set_device(pr, sdp->device_fd, 0, 0) != 0
|| blkid_probe_enable_superblocks(pr, TRUE) != 0
|| blkid_probe_enable_partitions(pr, TRUE) != 0) {
fprintf(stderr, _("Failed to create probe\n"));
return NULL;
}
error = fstat(sdp->device_fd, &st);
if (error < 0) {
fprintf(stderr, _("fstat failed\n"));
return NULL;
}
if (!S_ISREG(st.st_mode) && blkid_probe_enable_topology(pr, TRUE) != 0) {
fprintf(stderr, _("Failed to create probe\n"));
return NULL;
}
ret = blkid_do_fullprobe(pr);
if (ret == 0 && !S_ISREG(st.st_mode)) {
blkid_topology tp = blkid_probe_get_topology(pr);
if (tp != NULL) {
unsigned long min_io_sz = blkid_topology_get_minimum_io_size(tp);
unsigned long opt_io_sz = blkid_topology_get_optimal_io_size(tp);
unsigned long phy_sector_sz = blkid_topology_get_physical_sector_size(tp);
if ((min_io_sz > phy_sector_sz) &&
(opt_io_sz > phy_sector_sz)) {
al_base = opt_io_sz / sdp->bsize;
al_off = min_io_sz / sdp->bsize;
}
}
}
blkid_free_probe(pr);
return lgfs2_rgrps_init(sdp, al_base, al_off);
}
static struct wipe_desc *
read_offsets(struct wipe_desc *wp, const char *fname, int zap)
{
blkid_probe pr;
int rc;
if (!fname)
return NULL;
pr = blkid_new_probe_from_filename(fname);
if (!pr)
errx(EXIT_FAILURE, _("error: %s: probing initialization failed"), fname);
blkid_probe_enable_superblocks(pr, 0); /* enabled by default ;-( */
blkid_probe_enable_partitions(pr, 1);
rc = blkid_do_fullprobe(pr);
blkid_probe_enable_partitions(pr, 0);
if (rc == 0) {
const char *type = NULL;
blkid_probe_lookup_value(pr, "PTTYPE", &type, NULL);
warnx(_("WARNING: %s: appears to contain '%s' "
"partition table"), fname, type);
}
blkid_probe_enable_superblocks(pr, 1);
blkid_probe_set_superblocks_flags(pr, BLKID_SUBLKS_MAGIC |
BLKID_SUBLKS_TYPE | BLKID_SUBLKS_USAGE |
BLKID_SUBLKS_LABEL | BLKID_SUBLKS_UUID);
while (blkid_do_probe(pr) == 0) {
wp = get_offset_from_probe(wp, pr, zap);
if (!wp)
break;
}
blkid_free_probe(pr);
return wp;
}
static void
wipe_device(int fd, const char *devname, int force)
{
char *type = NULL;
int zap = 1;
#ifdef HAVE_LIBBLKID
blkid_probe pr = NULL;
#endif
if (!force) {
if (lseek(fd, 0, SEEK_SET) != 0)
errx(EXIT_FAILURE, _("unable to rewind swap-device"));
#ifdef HAVE_LIBBLKID
pr = new_prober(fd);
blkid_probe_enable_partitions(pr, 1);
blkid_probe_enable_superblocks(pr, 0);
if (blkid_do_fullprobe(pr) == 0 &&
blkid_probe_lookup_value(pr, "PTTYPE",
(const char **) &type, NULL) == 0 && type) {
type = xstrdup(type);
zap = 0;
}
#else
/* don't zap if compiled without libblkid */
zap = 0;
#endif
}
if (zap) {
/*
* Wipe boodbits
*/
char buf[1024];
const char *data = NULL;
if (lseek(fd, 0, SEEK_SET) != 0)
errx(EXIT_FAILURE, _("unable to rewind swap-device"));
memset(buf, 0, sizeof(buf));
if (write_all(fd, buf, sizeof(buf)))
errx(EXIT_FAILURE, _("unable to erase bootbits sectors"));
#ifdef HAVE_LIBBLKID
/*
* Wipe rest of the device
*/
if (!pr)
pr = new_prober(fd);
blkid_probe_enable_superblocks(pr, 1);
blkid_probe_enable_partitions(pr, 0);
blkid_probe_set_superblocks_flags(pr, BLKID_SUBLKS_MAGIC|BLKID_SUBLKS_TYPE);
while (blkid_do_probe(pr) == 0) {
if (blkid_probe_lookup_value(pr, "TYPE", &data, NULL) == 0 && data)
warnx(_("%s: warning: wiping old %s signature."), devname, data);
blkid_do_wipe(pr, 0);
}
#endif
} else {
warnx(_("%s: warning: don't erase bootbits sectors"),
devname);
if (type)
fprintf(stderr, _(" (%s partition table detected). "), type);
else
fprintf(stderr, _(" (compiled without libblkid). "));
fprintf(stderr, _("Use -f to force.\n"));
}
#ifdef HAVE_LIBBLKID
blkid_free_probe(pr);
#endif
}
static void
zap_bootbits(int fd, const char *devname, int force, int is_blkdev)
{
char *type = NULL;
int whole = 0;
int zap = 1;
if (!force) {
if (lseek(fd, 0, SEEK_SET) != 0)
die(_("unable to rewind swap-device"));
if (is_blkdev && is_whole_disk_fd(fd, devname)) {
/* don't zap bootbits on whole disk -- we know nothing
* about bootloaders on the device */
whole = 1;
zap = 0;
} else {
#ifdef HAVE_LIBBLKID_INTERNAL
blkid_probe pr = blkid_new_probe();
if (!pr)
die(_("unable to alloc new libblkid probe"));
if (blkid_probe_set_device(pr, fd, 0, 0))
die(_("unable to assign device to libblkid probe"));
blkid_probe_enable_partitions(pr, 1);
blkid_probe_enable_superblocks(pr, 0);
if (blkid_do_fullprobe(pr) == 0)
blkid_probe_lookup_value(pr, "PTTYPE",
(const char **) &type, NULL);
if (type) {
type = strdup(type);
zap = 0;
}
blkid_free_probe(pr);
#else
/* don't zap if compiled without libblkid */
zap = 0;
#endif
}
}
if (zap) {
char buf[1024];
if (lseek(fd, 0, SEEK_SET) != 0)
die(_("unable to rewind swap-device"));
memset(buf, 0, sizeof(buf));
if (write_all(fd, buf, sizeof(buf)))
die(_("unable to erase bootbits sectors"));
return;
}
fprintf(stderr, _("%s: %s: warning: don't erase bootbits sectors\n"),
program_name, devname);
if (type)
fprintf(stderr, _(" (%s partition table detected). "), type);
else if (whole)
fprintf(stderr, _(" on whole disk. "));
else
fprintf(stderr, _(" (compiled without libblkid). "));
fprintf(stderr, "Use -f to force.\n");
}
int main(int argc, char *argv[])
{
int rc;
char *devname;
blkid_probe pr;
blkid_topology tp;
if (argc < 2) {
fprintf(stderr, "usage: %s <device> "
"-- prints topology details about the device\n",
program_invocation_short_name);
return EXIT_FAILURE;
}
devname = argv[1];
pr = blkid_new_probe_from_filename(devname);
if (!pr)
err(EXIT_FAILURE, "%s: failed to create a new libblkid probe",
devname);
/*
* Binary interface
*/
tp = blkid_probe_get_topology(pr);
if (tp) {
printf("----- binary interface:\n");
printf("\talignment offset : %lu\n",
blkid_topology_get_alignment_offset(tp));
printf("\tminimum io size : %lu\n",
blkid_topology_get_minimum_io_size(tp));
printf("\toptimal io size : %lu\n",
blkid_topology_get_optimal_io_size(tp));
printf("\tlogical sector size : %lu\n",
blkid_topology_get_logical_sector_size(tp));
printf("\tphysical sector size : %lu\n",
blkid_topology_get_physical_sector_size(tp));
}
/*
* NAME=value interface
*/
/* enable topology probing */
blkid_probe_enable_topology(pr, TRUE);
/* disable superblocks probing (enabled by default) */
blkid_probe_enable_superblocks(pr, FALSE);
rc = blkid_do_fullprobe(pr);
if (rc == -1)
errx(EXIT_FAILURE, "%s: blkid_do_fullprobe() failed", devname);
else if (rc == 1)
warnx("%s: missing topology information", devname);
else {
int i, nvals = blkid_probe_numof_values(pr);
printf("----- NAME=value interface (values: %d):\n", nvals);
for (i = 0; i < nvals; i++) {
const char *name, *data;
blkid_probe_get_value(pr, i, &name, &data, NULL);
printf("\t%s = %s\n", name, data);
}
}
blkid_free_probe(pr);
return EXIT_SUCCESS;
}
static int lowprobe_device(blkid_probe pr, const char *devname, char *show[],
int output, blkid_loff_t offset, blkid_loff_t size)
{
const char *data;
const char *name;
int nvals = 0, n, num = 1;
size_t len;
int fd;
int rc = 0;
struct stat st;
fd = open(devname, O_RDONLY);
if (fd < 0) {
fprintf(stderr, "error: %s: %s\n", devname, strerror(errno));
return 2;
}
if (blkid_probe_set_device(pr, fd, offset, size))
goto done;
if (fstat(fd, &st))
goto done;
/*
* partitions probing
*/
blkid_probe_enable_superblocks(pr, 0); /* enabled by default ;-( */
blkid_probe_enable_partitions(pr, 1);
rc = blkid_do_fullprobe(pr);
blkid_probe_enable_partitions(pr, 0);
if (rc < 0)
goto done; /* -1 = error, 1 = nothing, 0 = succes */
/*
* Don't probe for FS/RAIDs on small devices
*/
if (rc || S_ISCHR(st.st_mode) ||
blkid_probe_get_size(pr) > 1024 * 1440) {
/*
* filesystems/RAIDs probing
*/
blkid_probe_enable_superblocks(pr, 1);
rc = blkid_do_safeprobe(pr);
if (rc < 0)
goto done;
}
nvals = blkid_probe_numof_values(pr);
if (output & OUTPUT_DEVICE_ONLY) {
printf("%s\n", devname);
goto done;
}
for (n = 0; n < nvals; n++) {
if (blkid_probe_get_value(pr, n, &name, &data, &len))
continue;
if (show[0] && !has_item(show, name))
continue;
len = strnlen((char *) data, len);
print_value(output, num++, devname, (char *) data, name, len);
}
if (nvals >= 1 && !(output & (OUTPUT_VALUE_ONLY | OUTPUT_UDEV_LIST)))
printf("\n");
done:
if (rc == -2) {
if (output & OUTPUT_UDEV_LIST)
print_udev_ambivalent(pr);
else
fprintf(stderr,
"%s: ambivalent result (probably more "
"filesystems on the device, use wipefs(8) "
"to see more details)\n",
devname);
}
close(fd);
return !nvals ? 2 : 0;
}
