+
+static char *
+get_lvm_field (const char *cmd, const char *field, const char *device)
+{
+ char *out;
+ char *err;
+ int r = command (&out, &err,
+ "lvm", cmd,
+ "--unbuffered", "--noheadings", "-o", field,
+ device, NULL);
+ if (r == -1) {
+ reply_with_error ("%s: %s", device, err);
+ free (out);
+ free (err);
+ return NULL;
+ }
+
+ free (err);
+
+ trim (out);
+ return out; /* Caller frees. */
+}
+
+char *
+do_pvuuid (const char *device)
+{
+ return get_lvm_field ("pvs", "pv_uuid", device);
+}
+
+char *
+do_vguuid (const char *vgname)
+{
+ return get_lvm_field ("vgs", "vg_uuid", vgname);
+}
+
+char *
+do_lvuuid (const char *device)
+{
+ return get_lvm_field ("lvs", "lv_uuid", device);
+}
+
+static char **
+get_lvm_fields (const char *cmd, const char *field, const char *device)
+{
+ char *out;
+ char *err;
+ int r = command (&out, &err,
+ "lvm", cmd,
+ "--unbuffered", "--noheadings", "-o", field,
+ device, NULL);
+ if (r == -1) {
+ reply_with_error ("%s: %s", device, err);
+ free (out);
+ free (err);
+ return NULL;
+ }
+
+ free (err);
+
+ char **ret = split_lines (out);
+ free (out);
+
+ if (ret == NULL)
+ return NULL;
+
+ size_t i;
+ for (i = 0; ret[i] != NULL; ++i)
+ trim (ret[i]);
+
+ return ret;
+}
+
+char **
+do_vgpvuuids (const char *vgname)
+{
+ return get_lvm_fields ("vgs", "pv_uuid", vgname);
+}
+
+char **
+do_vglvuuids (const char *vgname)
+{
+ return get_lvm_fields ("vgs", "lv_uuid", vgname);
+}
+
+int
+do_vgscan (void)
+{
+ char *err;
+ int r;
+
+ r = command (NULL, &err,
+ "lvm", "vgscan", NULL);
+ if (r == -1) {
+ reply_with_error ("%s", err);
+ free (err);
+ return -1;
+ }
+
+ free (err);
+ return 0;
+}