[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>

1 files changed, 4 insertions, 3 deletions

diff --git a/iptables.c b/iptables.c
index 25ca358..7096121 100644
--- a/iptables.c
+++ b/iptables.c
@@ -1818,7 +1818,7 @@ int do_command(int argc, char *argv[], char **table, iptc_handle_t *handle)
 				optarg[0] = '\0';
 				continue;
 			}
-			printf("Bad argument `%s'\n", optarg);
+			fprintf(stderr, "Bad argument `%s'\n", optarg);
 			exit_tryhelp(2);
 
 		default:
@@ -1990,8 +1990,9 @@ int do_command(int argc, char *argv[], char **table, iptc_handle_t *handle)
 		}
 
 		if (target && iptc_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);