+
+char *
+do_vfs_label (const char *device)
+{
+ return get_blkid_tag (device, "LABEL");
+}
+
+char *
+do_vfs_uuid (const char *device)
+{
+ return get_blkid_tag (device, "UUID");
+}
+
+/* RHEL5 blkid doesn't have the -p(partition info) option and the
+ * -i(I/O limits) option so we must test for these options the first
+ * time the function is called.
+ */
+static int
+test_blkid_p_opt(void)
+{
+ static int result;
+ char *err = NULL;
+
+ int r = commandr(NULL, &err, "blkid", "-p", "/dev/null", NULL);
+ if (r == -1) {
+ reply_with_error("could not run 'blkid' command: %s", err);
+ free(err);
+ return -1;
+ }
+
+ if (strstr(err, "invalid option --"))
+ result = 0;
+ else
+ result = 1;
+ free(err);
+ return result;
+}
+
+static char **
+blkid_with_p_opt(const char *device)
+{
+ int r;
+ char *out = NULL, *err = NULL;
+ char **lines = NULL;
+ char **ret = NULL;
+ int size = 0, alloc = 0;
+
+ r = command(&out, &err, "blkid", "-c", "/dev/null",
+ "-p", "-i", "-o", "export", device, NULL);
+ if (r == -1) {
+ reply_with_error("%s", err);
+ goto error;
+ }
+
+ /* Split the command output into lines */
+ lines = split_lines(out);
+ if (lines == NULL) {
+ reply_with_perror("malloc");
+ goto error;
+ }
+
+ /* Parse the output of blkid -p -i -o export:
+ * UUID=b6d83437-c6b4-4bf0-8381-ef3fc3578590
+ * VERSION=1.0
+ * TYPE=ext2
+ * USAGE=filesystem
+ * MINIMUM_IO_SIZE=512
+ * PHYSICAL_SECTOR_SIZE=512
+ * LOGICAL_SECTOR_SIZE=512
+ * PART_ENTRY_SCHEME=dos
+ * PART_ENTRY_TYPE=0x83
+ * PART_ENTRY_NUMBER=6
+ * PART_ENTRY_OFFSET=642875153
+ * PART_ENTRY_SIZE=104857600
+ * PART_ENTRY_DISK=8:0
+ */
+ for (char **i = lines; *i != NULL; i++) {
+ char *line = *i;
+
+ /* Skip blank lines (shouldn't happen) */
+ if (line[0] == '\0') continue;
+
+ /* Split the line in 2 at the equals sign */
+ char *eq = strchr(line, '=');
+ if (eq) {
+ *eq = '\0'; eq++;
+
+ /* Add the key/value pair to the output */
+ if (add_string(&ret, &size, &alloc, line) == -1 ||
+ add_string(&ret, &size, &alloc, eq) == -1) goto error;
+ } else {
+ fprintf(stderr, "blkid: unexpected blkid output ignored: %s", line);
+ }
+ }
+
+ if (add_string(&ret, &size, &alloc, NULL) == -1) goto error;
+
+ free(out);
+ free(err);
+ free(lines);
+
+ return ret;
+
+error:
+ free(out);
+ free(err);
+ if (lines) free(lines);
+ if (ret) free_strings(ret);
+
+ return NULL;
+}
+
+static char **
+blkid_without_p_opt(const char *device)
+{
+ char **ret = NULL;
+ int size = 0, alloc = 0;
+
+ if (add_string(&ret, &size, &alloc, "TYPE") == -1) goto error;
+ if (add_string(&ret, &size, &alloc, get_blkid_tag(device, "TYPE")) == -1)
+ goto error;
+ if (add_string(&ret, &size, &alloc, "LABEL") == -1) goto error;
+ if (add_string(&ret, &size, &alloc, get_blkid_tag(device, "LABEL")) == -1)
+ goto error;
+ if (add_string(&ret, &size, &alloc, "UUID") == -1) goto error;
+ if (add_string(&ret, &size, &alloc, get_blkid_tag(device, "UUID")) == -1)
+ goto error;
+ if (add_string_nodup(&ret, &size, &alloc, NULL) == -1) goto error;
+
+ return ret;
+error:
+ if (ret) free_strings(ret);
+ return NULL;
+}
+
+char **
+do_blkid(const char *device)
+{
+ int r;
+ char *out = NULL, *err = NULL;
+ char **lines = NULL;
+
+ char **ret = NULL;
+ int size = 0, alloc = 0;
+ int blkid_has_p_opt;
+
+ if ((blkid_has_p_opt = test_blkid_p_opt()) == -1)
+ return NULL;
+ else if (blkid_has_p_opt)
+ return blkid_with_p_opt(device);
+ else
+ return blkid_without_p_opt(device);
+}