From e21677fe7dc247515554e702ddd5c048b57876cd Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Thu, 30 Jul 2009 10:44:08 +0200
Subject: [PATCH] libblkid: add samples/topology.c

Signed-off-by: Karel Zak <kzak@redhat.com>
---
 configure.ac                     |  1 +
 shlibs/blkid/Makefile.am         |  2 +-
 shlibs/blkid/samples/.gitignore  |  1 +
 shlibs/blkid/samples/Makefile.am |  7 +++
 shlibs/blkid/samples/topology.c  | 95 ++++++++++++++++++++++++++++++++
 5 files changed, 105 insertions(+), 1 deletion(-)
 create mode 100644 shlibs/blkid/samples/.gitignore
 create mode 100644 shlibs/blkid/samples/Makefile.am
 create mode 100644 shlibs/blkid/samples/topology.c

diff --git a/configure.ac b/configure.ac
index 1c914d19..68099324 100644
--- a/configure.ac
+++ b/configure.ac
@@ -923,6 +923,7 @@ shlibs/blkid/Makefile
 shlibs/blkid/src/Makefile
 shlibs/blkid/src/superblocks/Makefile
 shlibs/blkid/src/topology/Makefile
+shlibs/blkid/samples/Makefile
 shlibs/uuid/uuid.pc
 shlibs/uuid/Makefile
 shlibs/uuid/man/Makefile
diff --git a/shlibs/blkid/Makefile.am b/shlibs/blkid/Makefile.am
index a76b1fd8..6ad42d8c 100644
--- a/shlibs/blkid/Makefile.am
+++ b/shlibs/blkid/Makefile.am
@@ -1,6 +1,6 @@
 include $(top_srcdir)/config/include-Makefile.am
 
-SUBDIRS = src
+SUBDIRS = src samples
 
 # pkg-config stuff
 pkgconfigdir = $(usrlib_execdir)/pkgconfig
diff --git a/shlibs/blkid/samples/.gitignore b/shlibs/blkid/samples/.gitignore
new file mode 100644
index 00000000..e27df1c9
--- /dev/null
+++ b/shlibs/blkid/samples/.gitignore
@@ -0,0 +1 @@
+topology
diff --git a/shlibs/blkid/samples/Makefile.am b/shlibs/blkid/samples/Makefile.am
new file mode 100644
index 00000000..3b7de7da
--- /dev/null
+++ b/shlibs/blkid/samples/Makefile.am
@@ -0,0 +1,7 @@
+include $(top_srcdir)/config/include-Makefile.am
+
+AM_CPPFLAGS += -I$(ul_libblkid_srcdir)
+AM_LDFLAGS += $(ul_libblkid_la)
+
+noinst_PROGRAMS = topology
+
diff --git a/shlibs/blkid/samples/topology.c b/shlibs/blkid/samples/topology.c
new file mode 100644
index 00000000..c031b82c
--- /dev/null
+++ b/shlibs/blkid/samples/topology.c
@@ -0,0 +1,95 @@
+/*
+ * 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>
+
+#ifndef TRUE
+# define TRUE 1
+# define FALSE 0
+#endif
+
+int main(int argc, char *argv[])
+{
+	int fd, 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];
+
+	fd = open(devname, O_RDONLY);
+	if (fd < 0)
+		err(EXIT_FAILURE, "%s: open() failed", devname);
+
+	pr = blkid_new_probe();
+	if (!pr)
+		err(EXIT_FAILURE, "faild 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");
+
+	/*
+	 * 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;
+
+		printf("----- NAME=value interface (values: %d):\n", nvals);
+
+		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);
+		}
+	}
+
+	/*
+	 * Binary interface
+	 */
+	tp = blkid_probe_get_topology(pr);
+	if (tp) {
+		printf("----- binary interface:\n");
+		printf("alignment offset : %lu\n",
+				blkid_topology_get_alignment_offset(tp));
+		printf("minimum io size  : %lu\n",
+				blkid_topology_get_minimum_io_size(tp));
+		printf("optimal io size  : %lu\n",
+				blkid_topology_get_optimal_io_size(tp));
+	}
+
+	return EXIT_SUCCESS;
+}
-- 
2.39.5