Re: can alarm(3) fail?

[Todd C . Miller]

On Fri, 18 Jun 2021 15:17:47 -0600, "Theo de Raadt" wrote:

> OK.  How any pieces of code were found which do that?
>
> I mean, code search for ' = alarm('

In our tree?  Just ksh.

static void
alarm_catcher(int sig)
{
        int errno_ = errno;

        if (ksh_tmout_state == TMOUT_READING) {
                int left = alarm(0);

                if (left == 0) {
                        ksh_tmout_state = TMOUT_LEAVING;
                        intrsig = 1;
                } else
                        alarm(left);
        }
        errno = errno_;
}

 - todd