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|
fun statusToString status =
case status of
Posix.Process.W_EXITED => "W_EXITED"
| Posix.Process.W_EXITSTATUS w => concat ["W_EXITSTATUS ", Word8.toString w]
| Posix.Process.W_SIGNALED s =>
concat ["W_SIGNALED ", SysWord.toString (Posix.Signal.toWord s)]
| Posix.Process.W_STOPPED s =>
concat ["W_STOPPED ", SysWord.toString (Posix.Signal.toWord s)]
val cmd = CommandLine.name ()
fun stdout () =
TextIO.output (TextIO.stdOut, "Hello world! [stdout]\n")
fun exit () = Posix.Process.exit 0wx7
fun diverge () = diverge ()
fun test () =
let
fun spawn arg =
let
val _ = TextIO.flushOut (TextIO.stdOut)
val _ = TextIO.flushOut (TextIO.stdErr)
in
MLton.Process.spawn
{path = cmd, args = [cmd, arg]}
end
fun waitpid pid =
let
val (pid', status) =
Posix.Process.waitpid (Posix.Process.W_CHILD pid, [])
val () =
if pid <> pid'
then raise Fail "reap: pid <> pid'"
else ()
in
status
end
fun kill (pid, signal) =
Posix.Process.kill (Posix.Process.K_PROC pid, signal)
fun doTest (arg, withPid) =
let
val _ = print (concat ["testing ", arg, "...\n"])
val pid = spawn arg
val () = withPid pid
val status = waitpid pid
val _ = print (concat ["exit_status: ", statusToString status, "\n"])
in
()
end
fun doSimpleTest arg = doTest (arg, fn _ => ())
in
print "spawn test:\n"
; doSimpleTest "stdout"
; doSimpleTest "exit"
; doTest ("diverge", fn pid => kill (pid, Posix.Signal.kill))
end
val _ =
case CommandLine.arguments () of
[] => test ()
| ["stdout"] => stdout ()
| ["exit"] => exit ()
| ["diverge"] => diverge ()
| _ => raise Match
|
