/usr/src/blcr-0.8.5/tests/sml_test.sh is in blcr-dkms 0.8.5-2.1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 | #!/bin/sh
#
# Test of checkpoint/restart of an sml script.
# Note that the outer shell script is bash
# First ensure we have sml
sml -h >/dev/null || exit 77
. ${cr_testsdir:-`dirname $0`}/shellinit
\rm -f Context[123] .Context[123].tmp 2>/dev/null
bash <<-'__OUTER__'
exec 2>/dev/null # Drop job control message(s) from the outer script
echo '#ST_ALARM:120'
echo '#ST_IGNORE:^Standard ML of New Jersey'
echo '#ST_IGNORE:\[library .* is stable\]'
echo '#ST_IGNORE:\[autoloading.*\]'
$cr_run sml 2>&1 <<'__INNER__'
(* Quiet most internal messages *)
Control.Print.out := {say=fn _=>(), flush=fn()=>()};
SMLofNJ.Internals.GC.messages false;
(* Lots of functions to build up *)
val pidToInt = (SysWord.toInt o Posix.Process.pidToWord);
fun waitpid (i:int) = (Posix.Process.waitpid ((Posix.Process.W_CHILD o Posix.Process.wordToPid o SysWord.fromInt) i, []));
val sleep = (ignore o Posix.Process.sleep o Time.fromSeconds o Int.toLarge);
fun fork () = (case (Posix.Process.fork ()) of
NONE => 0
| SOME pid => (pidToInt pid));
fun exit (i:int) = ignore(OS.Process.exit (if (i = 0) then OS.Process.success else OS.Process.failure));
fun spawn (cmd:string list) =
let
val child = fork();
in
if (child = 0) then (
Posix.Process.exec ((List.hd cmd), cmd);
exit 1; (* not reached *)
0
) else child
end
fun println (s:string) = print(s ^ "\n");
val itoa = Int.toString;
val self = pidToInt(Posix.ProcEnv.getpid());
local
fun getenv (key:string) = (case Posix.ProcEnv.getenv(key) of NONE => "UNDEF" | SOME value => value);
val chkptCmd = getenv "cr_checkpoint";
val rstrtCmd = getenv "cr_restart"
in
fun checkpoint (file:string, pid:int) = (
spawn [chkptCmd, ("--file=" ^ file), "--term", "--tree", (itoa pid)];
if (pid <> self) then ignore(waitpid pid) else ();
sleep 1
);
fun restart (file:string) =
((spawn [rstrtCmd, file]) before (sleep 5))
end;
(* Fire up a child who counts for us *)
val pid = fork();
if (pid = 0) then (
let
fun say i = (println ((itoa i) ^ " Hello"); sleep 1);
fun hello 0 = say 0
| hello i = (hello(i - 1); say i)
in
hello 15;
exit 0
end )
else sleep 3;
(* Checkpoint and restart repeatedly *)
println "# Checkpoint original child";
checkpoint("Context1", pid);
println "# Restart 1";
val pid = restart("Context1");
println "# Checkpoint restarted child";
checkpoint("Context2", pid);
println "# Restart^2";
val pid = restart("Context2");
println "# Checkpoint self";
checkpoint("Context3", self);
waitpid pid;
println "16 DONE";
exit 0
__INNER__
exec 2>&1
sleep 3
echo "# Restart interpreter"
$cr_restart Context3
__OUTER__
\rm -f Context[123] .Context[123].tmp 2>/dev/null
|