[PATCH v1.2][BZ #15374] Make getent services compliant with RFC 6335 section 5.1

[Ondřej Bílka]

On Fri, Nov 01, 2013 at 09:06:44AM +0100, Andreas Schwab wrote:
> Ondřej Bílka <neleai@seznam.cz> writes:
> 
> > User still can specify -0 to get port 0 which is bit questionable.
> 
> Don't remove the isdigit check.
> 
> Andreas.
> 
OK now?

	[BZ #15374]
	* nss/getent.c: Recognize services starting with digit.

diff --git a/nss/getent.c b/nss/getent.c
index 8a3c864..e905ec5 100644
--- a/nss/getent.c
+++ b/nss/getent.c
@@ -788,8 +788,12 @@ services_keys (int number, char *key[])
       if (proto != NULL)
 	*proto++ = '\0';
 
-      if (isdigit (key[i][0]))
-	serv = getservbyport (htons (atol (key[i])), proto);
+      char *endptr;
+      long port = strtol (key[i], &endptr, 0);
+
+      if (isdigit (key[i][0]) && *endptr == '\0'
+	  && 0 <= port && port <= 65535)
+	serv = getservbyport (htons (port), proto);
       else
 	serv = getservbyname (key[i], proto);