parse-util: introduce parse_dev() helper

2017-06-06 22:42:35 +02:00
parent 9bfc0df113
commit fbcc7f4168
3 changed files with 30 additions and 0 deletions
@@ -589,3 +589,18 @@ int parse_ip_port(const char *s, uint16_t *ret) {

        return 0;
 }
+
+int parse_dev(const char *s, dev_t *ret) {
+        unsigned x, y;
+        dev_t d;
+
+        if (sscanf(s, "%u:%u", &x, &y) != 2)
+                return -EINVAL;
+
+        d = makedev(x, y);
+        if ((unsigned) major(d) != x || (unsigned) minor(d) != y)
+                return -EINVAL;
+
+        *ret = d;
+        return 0;
+}