sock: Error out if setting of the system socket memory fails

Currently we ignore the return value of the write() calls to
/proc/sys/net/core/{r,w}mem_{default,max} in set_system_socket_mem().
Better check the return value and notify the user about it.

This also fixes a clang compiler warning about a variable explicitely
assigned to itself.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 2 insertions, 1 deletions

diff --git a/sock.c b/sock.c
index e5f6eac..6c973ed 100644
--- a/sock.c
+++ b/sock.c
@@ -177,7 +177,8 @@ static void set_system_socket_mem(int which, int val)
 	slprintf(buff, sizeof(buff), "%d", val);
 
 	ret = write(fd, buff, strlen(buff));
-	ret = ret;
+	if (ret < 0)
+		panic("Cannot set system socket memory!\n");
 
 	close(fd);
 }