libblkid: add mkfs sample

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

diff --git a/shlibs/blkid/samples/.gitignore b/shlibs/blkid/samples/.gitignore
index fd2a433cbe0c0dee03e4b632951713945b6044c7..5ee573935e76783f8708548af65de3e609aacf98 100644 (file)
--- a/shlibs/blkid/samples/.gitignore
+++ b/shlibs/blkid/samples/.gitignore
@@ -1,2 +1,3 @@
 topology
 partitions
+mkfs

diff --git a/shlibs/blkid/samples/Makefile.am b/shlibs/blkid/samples/Makefile.am
index 126f72f2d935632c0c4ee102b170a0cf39fea87c..cca01de0d5907d839646803d52ac184292cd43f6 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
+noinst_PROGRAMS = topology partitions mkfs
 

diff --git a/shlibs/blkid/samples/mkfs.c b/shlibs/blkid/samples/mkfs.c
new file mode 100644 (file)
index 0000000..64f213a
--- /dev/null
+++ b/shlibs/blkid/samples/mkfs.c
@@ -0,0 +1,88 @@
+/*
+ * 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>  "
+                       "-- checks based on libblkid for mkfs-like programs.\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");
+
+       /*
+        * check Filesystems / Partitions overwrite
+        */
+
+       /* enable partitions probing (superblocks are enabled by default) */
+       blkid_probe_enable_partitions(pr, TRUE);
+
+       rc = blkid_do_fullprobe(pr);
+       if (rc == -1)
+               errx(EXIT_FAILURE, "%s: blkid_do_fullprobe() failed", devname);
+       else if (rc == 0) {
+               const char *type;
+
+               if (!blkid_probe_lookup_value(pr, "TYPE", &type, NULL))
+                       errx(EXIT_FAILURE, "%s: appears to contain an existing "
+                                       "filesystem (%s)", devname, type);
+
+               if (!blkid_probe_lookup_value(pr, "PTTYPE", &type, NULL))
+                       errx(EXIT_FAILURE, "%s: appears to contain an partition "
+                                       "table (%s)", devname, type);
+       }
+
+       /*
+        * get topology details
+        */
+       tp = blkid_probe_get_topology(pr);
+       if (!tp)
+               err(EXIT_FAILURE, "%s: failed to read topology", devname);
+
+
+       /* ... your mkfs.<type> code or so ...
+
+       off = blkid_topology_get_alignment_offset(tp);
+
+
+        */
+
+       return EXIT_SUCCESS;
+}