libblkid: add partitions sample

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

diff --git a/shlibs/blkid/samples/.gitignore b/shlibs/blkid/samples/.gitignore
index e27df1c91108dd81b8a064412221ec6097b51bef..fd2a433cbe0c0dee03e4b632951713945b6044c7 100644 (file)
--- a/shlibs/blkid/samples/.gitignore
+++ b/shlibs/blkid/samples/.gitignore
@@ -1 +1,2 @@
 topology
+partitions

diff --git a/shlibs/blkid/samples/Makefile.am b/shlibs/blkid/samples/Makefile.am
index 3b7de7da626dcabaec864cd997c1290bab896d7f..126f72f2d935632c0c4ee102b170a0cf39fea87c 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
+noinst_PROGRAMS = topology partitions
 

diff --git a/shlibs/blkid/samples/partitions.c b/shlibs/blkid/samples/partitions.c
new file mode 100644 (file)
index 0000000..78bcc0b
--- /dev/null
+++ b/shlibs/blkid/samples/partitions.c
@@ -0,0 +1,93 @@
+/*
+ * 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>
+
+int main(int argc, char *argv[])
+{
+       int fd, i, nparts;
+       char *devname;
+       blkid_probe pr;
+       blkid_partlist ls;
+       blkid_parttable root_tab = NULL;
+
+       if (argc < 2) {
+               fprintf(stderr, "usage: %s <device|file>  "
+                               "-- prints partitions\n",
+                               program_invocation_short_name);
+               return EXIT_FAILURE;
+       }
+
+       devname = argv[1];
+
+       fd = open(devname, O_RDONLY);
+       if (fd < 0)
+               err(EXIT_FAILURE, "%s: open() failed", devname);
+
+       pr = blkid_new_probe();
+       if (!pr)
+               err(EXIT_FAILURE, "failed to allocate a new libblkid probe");
+
+       if (blkid_probe_set_device(pr, fd, 0, 0) != 0)
+               err(EXIT_FAILURE, "failed to assign device to libblkid probe");
+
+       /* Binary interface */
+       ls = blkid_probe_get_partitions(pr);
+       if (!ls)
+               errx(EXIT_FAILURE, "%s: failed to read partitions\n", devname);
+
+       nparts = blkid_partlist_numof_partitions(ls);
+       if (!nparts)
+                errx(EXIT_FAILURE, "%s: does not contains any "
+                                "known partition table\n", devname);
+
+       for (i = 0; i < nparts; i++) {
+               const char *p;
+               blkid_partition par = blkid_partlist_get_partition(ls, i);
+               blkid_parttable tab = blkid_partition_get_table(par);
+
+               if (i == 0) {
+                       root_tab = tab;
+                       printf("size: %llu, sector size: %u, "
+                                       "PT: %s, offset: %llu\n---\n",
+                               (unsigned long long) blkid_probe_get_size(pr),
+                               blkid_probe_get_sectorsize(pr),
+                               blkid_parttable_get_type(tab),
+                               (unsigned long long) blkid_parttable_get_offset(tab));
+               }
+               printf("#%d: %10llu %10llu  0x%x",
+                       blkid_partition_get_partno(par),
+                       (unsigned long long) blkid_partition_get_start(par),
+                       (unsigned long long) blkid_partition_get_size(par),
+                       blkid_partition_get_type(par));
+
+               if (root_tab != tab)
+                       /* subpartition */
+                       printf(" (%s)", blkid_parttable_get_type(tab));
+
+               p = blkid_partition_get_name(par);
+               if (p)
+                       printf(" name='%s'", p);
+               p = blkid_partition_get_uuid(par);
+               if (p)
+                       printf(" uuid='%s'", p);
+
+               putc('\n', stdout);
+       }
+
+       blkid_free_probe(pr);
+
+       return EXIT_SUCCESS;
+}