From: Karel Zak <kzak@redhat.com>
Date: Wed, 16 Sep 2009 14:24:14 +0000 (+0200)
Subject: libblkid: add partitions sample
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c7fcbf5a891dc74206e945bf0011192e0956469f;p=util-linux

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 e27df1c9..fd2a433c 100644
--- 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 3b7de7da..126f72f2 100644
--- 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
index 00000000..78bcc0be
--- /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;
+}