Merge pull request #625 from 1ace/fix/buffer-overflow

Fix a couple potential buffer overflows

common/ipc-client.c

@@ -32,7 +32,8 @@ int ipc_open_socket(const char *socket_path) {
 		sway_abort("Unable to open Unix socket");
 	}
 	addr.sun_family = AF_UNIX;
-	strcpy(addr.sun_path, socket_path);
+	strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path));
+	addr.sun_path[sizeof(addr.sun_path) - 1] = 0;
 	int l = sizeof(addr.sun_family) + strlen(addr.sun_path);
 	if (connect(socketfd, (struct sockaddr *)&addr, l) == -1) {
 		sway_abort("Unable to connect to %s", socket_path);

sway/commands.c

@@ -506,7 +506,8 @@ static struct cmd_results *cmd_exec_always(int argc, char **argv) {
 
 	// Put argument into cmd array
 	char cmd[4096];
-	strcpy(cmd, tmp);
+	strncpy(cmd, tmp, sizeof(cmd));
+	cmd[sizeof(cmd) - 1] = 0;
 	free(tmp);
 	sway_log(L_DEBUG, "Executing %s", cmd);