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-rw-r--r--libblkid/samples/superblocks.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/libblkid/samples/superblocks.c b/libblkid/samples/superblocks.c
new file mode 100644
index 0000000..7d95557
--- /dev/null
+++ b/libblkid/samples/superblocks.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2009 Karel Zak <kzak@redhat.com>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <blkid.h>
+
+#include "c.h"
+
+int main(int argc, char *argv[])
+{
+ int rc;
+ char *devname;
+ blkid_probe pr;
+
+ if (argc < 2) {
+ fprintf(stderr, "usage: %s <device> "
+ "-- prints superblocks 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);
+
+ /* enable topology probing */
+ blkid_probe_enable_superblocks(pr, TRUE);
+
+ /* set all flags */
+ blkid_probe_set_superblocks_flags(pr,
+ BLKID_SUBLKS_LABEL | BLKID_SUBLKS_LABELRAW |
+ BLKID_SUBLKS_UUID | BLKID_SUBLKS_UUIDRAW |
+ BLKID_SUBLKS_TYPE | BLKID_SUBLKS_SECTYPE |
+ BLKID_SUBLKS_USAGE | BLKID_SUBLKS_VERSION |
+ BLKID_SUBLKS_MAGIC);
+
+ rc = blkid_do_safeprobe(pr);
+ if (rc == -1)
+ errx(EXIT_FAILURE, "%s: blkid_do_safeprobe() failed", devname);
+ else if (rc == 1)
+ warnx("%s: cannot gather information about superblocks", devname);
+ else {
+ int i, nvals = blkid_probe_numof_values(pr);
+
+ 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;
+}