Larch 7

1 files changed, 42 insertions, 0 deletions

diff --git a/build_tools/l7/larch0/cli/test.py b/build_tools/l7/larch0/cli/test.py
new file mode 100755
index 0000000..18e8067
--- /dev/null
+++ b/build_tools/l7/larch0/cli/test.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+#
+# This is a little script for testing the dispatcher and termination of
+# subprocesses. It spawns several levels of itself, each instance just
+# outputs an incrementing count until it is terminated.
+
+import sys, os, time, signal
+
+try:
+    import json as serialize
+except:
+    import simplejson as serialize
+
+def out(text):
+    sys.stdout.write(serialize.dumps(text) + '\n')
+    sys.stdout.flush()
+
+def sigint(num, frame):
+    """A handler for SIGINT. Tidy up properly and quit.
+    """
+    out("!>INTERRUPTED %d" % level)
+    exit(1)
+signal.signal(signal.SIGINT, sigint)
+
+level = 3
+while level > 0:
+    if os.fork():
+        break
+    time.sleep(1)
+    level -= 1
+
+sys.stderr.write('%d: pid=%d ppid=%d pgrp=%d\n' % (level,
+        os.getpid(), os.getppid(), os.getpgrp()))
+sys.stderr.flush()
+time.sleep(5)
+
+n = 0
+while True:
+    n += 1
+    out('--%d: %04d' % (level, n))
+    time.sleep(4)
+