+
+int
+do_part_to_partnum (const char *part)
+{
+ int err = 1;
+ size_t n = strlen (part);
+
+ while (n >= 1 && c_isdigit (part[n-1])) {
+ err = 0;
+ n--;
+ }
+
+ if (err) {
+ reply_with_error ("device name is not a partition");
+ return -1;
+ }
+
+ int r;
+ if (sscanf (&part[n], "%d", &r) != 1) {
+ reply_with_error ("could not parse number");
+ return -1;
+ }
+
+ return r;
+}