+ struct passwd *pw;
+ char *p;
+ unsigned long i = strtoul(name, &p, 0);
+
+ if (!*p)
+ pw = getpwuid(i);
+ else
+ pw = getpwnam(name);
+ if (!pw)
+ die(EXIT_FAILURE, "user `%s' not found", name);
+ if (gg && *gg == -1)
+ *gg = pw->pw_gid;
+ return (pw->pw_uid);
+}
+
+/* --- @u_getgroup@ --- *
+ *
+ * Arguments: @const char *name@ = user name or id requested
+ *
+ * Returns: Corresponding gid.
+ *
+ * Use: Resolves a group name into a gid. Dies on failure; suitable
+ * for use in argument parsing.
+ */
+
+gid_t u_getgroup(const char *name)
+{
+ struct group *gr;
+ char *p;
+ unsigned long i = strtoul(name, &p, 0);
+
+ if (!*p)
+ gr = getgrgid(i);
+ else
+ gr = getgrnam(name);
+ if (!gr)
+ die(EXIT_FAILURE, "group `%s' not found", name);
+ return (gr->gr_gid);