method

check

v1_9_2_180 - Show latest stable - Class: PTY

check(p1, p2 = v2)

public

checks the status of the child process specified by pid, and returns nil if the process is still alive and active. Otherwise, returns +Process::Status+ about the process if raise is false, or +PTY::ChildExited+ exception is raised.

static VALUE
pty_check(int argc, VALUE *argv, VALUE self)
{
    VALUE pid, exc;
    pid_t cpid;
    int status;

    rb_scan_args(argc, argv, "11", &pid, &exc);
    cpid = rb_waitpid(NUM2PIDT(pid), &status, WNOHANG|WUNTRACED);
    if (cpid == -1) return Qnil;

    if (!RTEST(exc)) return rb_last_status_get();
    raise_from_check(cpid, status);
    return Qnil;                /* not reached */
}

check

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