From 9827fa57da0ee93b7573fd13865c56ab3c34afc8 Mon Sep 17 00:00:00 2001 From: Denis Kirjanov Date: Sat, 5 Sep 2015 10:40:50 +0300 Subject: [PATCH] iproute: print more verbose error on route cache flush Before: kda@vfirst ~/devel/iproute2 $ ./ip/ip route flush cache Cannot open "/proc/sys/net/ipv4/route/flush" After: kda@vfirst ~/devel/iproute2/ip $ ./ip route flush cache Cannot open "/proc/sys/net/ipv4/route/flush": Permission denied Signed-off-by: Denis Kirjanov --- ip/iproute.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/ip/iproute.c b/ip/iproute.c index 8f49e628..abe41803 100644 --- a/ip/iproute.c +++ b/ip/iproute.c @@ -1213,7 +1213,8 @@ static int iproute_flush_cache(void) char *buffer = "-1"; if (flush_fd < 0) { - fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH); + fprintf (stderr, "Cannot open \"%s\": %s\n", + ROUTE_FLUSH_PATH, strerror(errno)); return -1; }