1 files changed, 120 insertions, 0 deletions
diff --git a/extras/volume_id/udev_volume_id.c b/extras/volume_id/udev_volume_id.c
new file mode 100644
index 0000000000..88779ccd36
--- /dev/null
+++ b/extras/volume_id/udev_volume_id.c
@@ -0,0 +1,120 @@
+/*
+ * udev_volume_id - udev callout to read filesystem label and uuid
+ *
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	sample udev rule for creation of a symlink with the filsystem uuid:
+ *	KERNEL="sd*", PROGRAM="/sbin/udev_volume_id -M%M -m%m -u", SYMLINK="%c"
+ *
+ *	This program is free software; you can redistribute it and/or modify it
+ *	under the terms of the GNU General Public License as published by the
+ *	Free Software Foundation version 2 of the License.
+ * 
+ *	This program is distributed in the hope that it will be useful, but
+ *	WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *	General Public License for more details.
+ * 
+ *	You should have received a copy of the GNU General Public License along
+ *	with this program; if not, write to the Free Software Foundation, Inc.,
+ *	675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "volume_id.h"
+
+int main(int argc, char *argv[])
+{
+	struct volume_id *vid;
+	const char help[] = "usage: udev_volume_id -m<minor> -M<major> [-t|-l|-u]\n";
+	int major = -1;
+	int minor = -1;
+	char *tail;
+	static const char short_options[] = "M:m:htlu";
+	int option;
+	char print = '\0';
+	int rc;
+
+
+	while (1) {
+		option = getopt(argc, argv, short_options);
+		if (option == -1)
+			break;
+
+		switch (option) {
+		case 'M':
+			major = (int) strtoul(optarg, &tail, 10);
+			if (tail[0] != '\0') {
+				printf("invalid major\n");
+				exit(1);
+			}
+			break;
+		case 'm':
+			minor = (int) strtoul(optarg, &tail, 10);
+			if (tail[0] != '\0') {
+				printf("invalid minor\n");
+				exit(1);
+			}
+			break;
+		case 't':
+			print = 't';
+			break;
+		case 'l':
+			print = 'l';
+			break;
+		case 'u':
+			print = 'u';
+			break;
+		case 'h':
+		case '?':
+		default:
+			printf(help);
+			exit(1);
+		}
+	}
+
+	if (major == -1 || minor == -1) {
+		printf(help);
+		exit(1);
+	}
+
+	vid = volume_id_open_dev_t(makedev(major, minor));
+	if (vid == NULL) {
+		printf("error open volume\n");
+		exit(1);
+	}
+
+	rc = volume_id_probe(vid, ALL);
+	if (rc != 0) {
+		printf("error probing volume\n");
+		exit(1);
+	}
+
+	switch (print) {
+	case 't':
+		printf("%s\n", vid->fs_name);
+		break;
+	case 'l':
+		if (vid->label_string[0] == '\0')
+			exit(2);
+		printf("%s\n", vid->label_string);
+		break;
+	case 'u':
+		if (vid->uuid_string[0] == '\0')
+			exit(2);
+		printf("%s\n", vid->uuid_string);
+		break;
+	default:
+		printf("T:%s\n", vid->fs_name);
+		printf("L:%s\n", vid->label_string);
+		printf("U:%s\n", vid->uuid_string);
+	}
+
+	volume_id_close(vid);
+
+	exit(0);
+}