method

check

v1_9_3_125 - Show latest stable - Class: PTY

check(p1, p2 = v2)

public

Checks the status of the child process specified by pid. Returns nil if the process is still alive. If the process is not alive, will return a Process::Status or raise a PTY::ChildExited (if raise was true).

`pid`	The process id of the process to check
`raise`	If true and the process identified by `pid` is no longer

alive a <tt>PTY::ChildExited</tt> is raised.

Returns nil or a Process::Status when raise is false.

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 || cpid == 0) return Qnil;

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

check

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