static sd_event *event;
static void run_child(Pty *pty) {
- int r, l;
+ ssize_t r, l;
char buf[512];
r = read(0, buf, sizeof(buf));
- assert_se(r == strlen(sndmsg));
+ assert_se((size_t)r == strlen(sndmsg));
assert_se(!strncmp(buf, sndmsg, r));
l = write(1, buf, r);