libblkid: add superblocks.c sample

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/shlibs/blkid/samples/.gitignore b/shlibs/blkid/samples/.gitignore
index 5ee573935e76783f8708548af65de3e609aacf98..409e5cff71c31d1cf3ecd61dd0c28db327d5a262 100644 (file)
--- a/shlibs/blkid/samples/.gitignore
+++ b/shlibs/blkid/samples/.gitignore
@@ -1,3 +1,4 @@
 topology
 partitions
 mkfs
+superblocks

diff --git a/shlibs/blkid/samples/Makefile.am b/shlibs/blkid/samples/Makefile.am
index cca01de0d5907d839646803d52ac184292cd43f6..f7458616c1d350c97aa852743eebaf7a03a1ab87 100644 (file)
--- a/shlibs/blkid/samples/Makefile.am
+++ b/shlibs/blkid/samples/Makefile.am
@@ -3,5 +3,5 @@ include $(top_srcdir)/config/include-Makefile.am
 AM_CPPFLAGS += -I$(ul_libblkid_srcdir)
 AM_LDFLAGS += $(ul_libblkid_la)
 
-noinst_PROGRAMS = topology partitions mkfs
+noinst_PROGRAMS = topology partitions mkfs superblocks
 

diff --git a/shlibs/blkid/samples/superblocks.c b/shlibs/blkid/samples/superblocks.c
new file mode 100644 (file)
index 0000000..276c29e
--- /dev/null
+++ b/shlibs/blkid/samples/superblocks.c
@@ -0,0 +1,68 @@
+/*
+ * 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 <err.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: faild 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;
+}