[PATCH iptables] print warnings to stderr
iptables prints some of its error messages and warnings to stdout.
This patch applies to svn r7075 and will make iptables print
diagnostic messages to stderr instead.
Signed-off-by: Max Kellermann <max@duempel.org>
diff --git a/ip6tables.c b/ip6tables.c
index f658fc7..938c91e 100644
--- a/ip6tables.c
+++ b/ip6tables.c
@@ -1592,9 +1592,10 @@
if (is_exthdr(fw.ipv6.proto)
&& (fw.ipv6.invflags & IP6T_INV_PROTO) == 0)
- printf("Warning: never matched protocol: %s. "
- "use extension match instead.\n",
- protocol);
+ fprintf(stderr,
+ "Warning: never matched protocol: %s. "
+ "use extension match instead.\n",
+ protocol);
break;
case 's':
@@ -1753,7 +1754,7 @@
optarg[0] = '\0';
continue;
}
- printf("Bad argument `%s'\n", optarg);
+ fprintf(stderr, "Bad argument `%s'\n", optarg);
exit_tryhelp(2);
default:
@@ -1926,8 +1927,9 @@
}
if (target && ip6tc_is_chain(jumpto, *handle)) {
- printf("Warning: using chain %s, not extension\n",
- jumpto);
+ fprintf(stderr,
+ "Warning: using chain %s, not extension\n",
+ jumpto);
if (target->t)
free(target->t);