From f646ba40489371e69f624f2dee2fc4e19ceec00e Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Sat, 21 Jan 2023 17:23:07 +0100 Subject: [PATCH] route: Fix compile warning with glibc This fixes the following compile problem: ```` /route.c: In function 'rtnl_flush': /route.c:45:15: error: ignoring return value of 'write' declared with attribute 'warn_unused_result' [-Werror=unused-result] 45 | (void)write(fd, "-1", 2); | ^~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors ninja: build stopped: subcommand failed. ```` Signed-off-by: Hauke Mehrtens --- route.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/route.c b/route.c index c552d1f..602fdc9 100644 --- a/route.c +++ b/route.c @@ -36,13 +36,16 @@ int route_table = 16800; static void rtnl_flush(void) { + ssize_t ret; int fd; fd = open("/proc/sys/net/ipv4/route/flush", O_WRONLY); if (fd < 0) return; - write(fd, "-1", 2); + ret = write(fd, "-1", 2); + if (ret != 2) + perror("write"); close(fd); } -- 2.30.2