lib/get_uid.c: get_uid(): Reimplement in terms of a2i()

Reviewed-by: "Serge E. Hallyn" <serge@hallyn.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

lib/get_uid.c

@@ -1,34 +1,18 @@
-/*
- * SPDX-FileCopyrightText: 2009       , Nicolas François
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
+// SPDX-FileCopyrightText: 2009, Nicolas François
+// SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
 
 
 #include <config.h>
 
 #ident "$Id$"
 
+#include "atoi/a2i.h"
 #include "prototypes.h"
-#include "defines.h"
 
 
 int
 get_uid(const char *uidstr, uid_t *uid)
 {
-	char       *end;
-	long long  val;
-
-	errno = 0;
-	val = strtoll(uidstr, &end, 10);
-	if (   ('\0' == *uidstr)
-	    || ('\0' != *end)
-	    || (0 != errno)
-	    || (/*@+longintegral@*/val != (uid_t)val)/*@=longintegral@*/) {
-		return -1;
-	}
-
-	*uid = val;
-	return 0;
+	return a2i(uid_t, uid, uidstr, NULL, 10, type_min(uid_t), type_max(uid_t));
 }
-