rename udev_volume_id to vol_id and add --export option

Signed-off-by: Kay Sievers <kay.sievers@suse.de>

1 files changed, 198 insertions, 0 deletions

diff --git a/extras/volume_id/vol_id.c b/extras/volume_id/vol_id.c
new file mode 100644
index 0000000000..3048fd8062
--- /dev/null
+++ b/extras/volume_id/vol_id.c
@@ -0,0 +1,198 @@
+/*
+ * udev_volume_id - udev callout to read filesystem label and uuid
+ *
+ * Copyright (C) 2005 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 -u %N", 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.
+ *
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <ctype.h>
+#include <sys/ioctl.h>
+
+#include "../../udev_utils.h"
+#include "../../logging.h"
+#include "volume_id/volume_id.h"
+#include "volume_id/dasd.h"
+
+#define BLKGETSIZE64 _IOR(0x12,114,size_t)
+
+#ifdef USE_LOG
+void log_message(int priority, const char *format, ...)
+{
+	va_list args;
+	static int udev_log = -1;
+
+	if (udev_log == -1) {
+		const char *value;
+
+		value = getenv("UDEV_LOG");
+		if (value)
+			udev_log = log_priority(value);
+		else
+			udev_log = LOG_ERR;
+	}
+
+	if (priority > udev_log)
+		return;
+
+	va_start(args, format);
+	vsyslog(priority, format, args);
+	va_end(args);
+}
+#endif
+
+static void set_str(char *to, const unsigned char *from, int count)
+{
+	int i, j;
+	int len;
+
+	len = strnlen(from, count);
+	while (isspace(from[len-1]))
+		len--;
+
+	i = 0;
+	while (isspace(from[i]) && (i < len))
+		i++;
+
+	j = 0;
+	while (i < len) {
+		switch(from[i]) {
+		case '/':
+			break;
+		case ' ':
+			to[j++] = '_';
+			break;
+		default:
+			to[j++] = from[i];
+		}
+		i++;
+	}
+	to[j] = '\0';
+}
+
+int main(int argc, char *argv[])
+{
+	const char help[] = "usage: udev_volume_id [--export|-t|-l|-u] <device>\n"
+			    "       --export\n"
+			    "       -t filesystem type\n"
+			    "       -l filesystem label\n"
+			    "       -u filesystem uuid\n"
+			    "\n";
+	enum print_type {
+		PRINT_EXPORT,
+		PRINT_TYPE,
+		PRINT_LABEL,
+		PRINT_UUID,
+	} print = PRINT_EXPORT;
+	struct volume_id *vid = NULL;
+	static char name[VOLUME_ID_LABEL_SIZE];
+	int i;
+	unsigned long long size;
+	const char *node = NULL;
+	int rc = 0;
+
+	logging_init("udev_volume_id");
+
+	for (i = 1 ; i < argc; i++) {
+		char *arg = argv[i];
+
+		if (strcmp(arg, "--export") == 0) {
+			print = PRINT_EXPORT;
+		} else if (strcmp(arg, "-t") == 0) {
+			print = PRINT_TYPE;
+		} else if (strcmp(arg, "-l") == 0) {
+			print = PRINT_LABEL;
+		} else if (strcmp(arg, "-u") == 0) {
+			print = PRINT_UUID;
+		} else
+			node = arg;
+	}
+	if (!node) {
+		err("no node specified");
+		fprintf(stderr, help);
+		rc = 1;
+		goto exit;
+	}
+
+	vid = volume_id_open_node(node);
+	if (vid == NULL) {
+		fprintf(stderr, "error open volume\n");
+		rc = 2;
+		goto exit;
+	}
+
+	if (ioctl(vid->fd, BLKGETSIZE64, &size) != 0)
+		size = 0;
+
+	if (volume_id_probe_all(vid, 0, size) == 0)
+		goto print;
+
+	if (volume_id_probe_dasd(vid) == 0)
+		goto print;
+
+	fprintf(stderr, "unknown volume type\n");
+	rc = 3;
+	goto exit;
+
+print:
+	set_str(name, vid->label, sizeof(vid->label));
+
+	switch (print) {
+	case PRINT_EXPORT:
+		printf("ID_FS_USAGE=%s\n", vid->usage);
+		printf("ID_FS_TYPE=%s\n", vid->type);
+		printf("ID_FS_VERSION=%s\n", vid->type_version);
+		printf("ID_FS_UUID=%s\n", vid->uuid);
+		printf("ID_FS_LABEL=%s\n", vid->label);
+		printf("ID_FS_LABEL_SAFE=%s\n", name);
+		break;
+	case PRINT_TYPE:
+		printf("%s\n", vid->type);
+		break;
+	case PRINT_LABEL:
+		if (name[0] == '\0' ||
+		    (vid->usage_id != VOLUME_ID_FILESYSTEM && vid->usage_id != VOLUME_ID_DISKLABEL)) {
+			rc = 3;
+			goto exit;
+		}
+		printf("%s\n", name);
+		break;
+	case PRINT_UUID:
+		if (vid->uuid[0] == '\0' || vid->usage_id != VOLUME_ID_FILESYSTEM) {
+			rc = 4;
+			goto exit;
+		}
+		printf("%s\n", vid->uuid);
+		break;
+	}
+
+exit:
+	if (vid != NULL)
+		volume_id_close(vid);
+
+	logging_close();
+	return rc;
+}