libxtables: flush before fork

Reference: http://bugs.debian.org/514869
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/xtables.c b/xtables.c
index 02bfc17a..d85e6390 100644
--- a/xtables.c
+++ b/xtables.c
@@ -272,6 +272,12 @@ int xtables_insmod(const char *modname, const char *modprobe, bool quiet)
 		modprobe = buf;
 	}
 
+	/*
+	 * Need to flush the buffer, or the child may output it again
+	 * when switching the program thru execv.
+	 */
+	fflush(stdout);
+
 	switch (fork()) {
 	case 0:
 		argv[0] = (char *)modprobe;