A perl script to run a command with a timeout. The command is killed if it

doesn't complete within the specified timeout period.

I tried to do this from within the pdispatch script, but I couldn't
get all the auxiliary processes to be killed correctly so implemented
this as a separate script in perl.

1 files changed, 38 insertions, 0 deletions

diff --git a/Tools/portbuild/scripts/ptimeout b/Tools/portbuild/scripts/ptimeout
new file mode 100755
index 0000000..53e28b7
--- /dev/null
+++ b/Tools/portbuild/scripts/ptimeout
@@ -0,0 +1,38 @@
+#!/usr/bin/perl -w
+# ptimeout: executes command but kills it after a specified timeout
+# usage: ptimeout timeout command args ...
+$timeout=$ARGV[0];
+splice(@ARGV, 0, 1);
+#print "timeout is ", $timeout, "\n";
+#print "arguments are ", "@ARGV", "\n";
+if ($pid1 = fork) {
+  if ($pid2 = fork) {
+    # parent
+    #print 'child pids are ', $pid1, ' ', $pid2, "\n";
+    $child=wait;
+    $status=$?;
+    #print "exited child is $child, status is $status\n";
+    if ($pid1 = $child) {
+      #print "killing process $pid2\n";
+      kill 'TERM', $pid2;
+    }
+    else {
+      #print "killing process $pid1\n";
+      kill 'TERM', $pid1;
+    }
+    # exit status in upper 8 bits, killed signal (if any) in lower 8 bits
+    exit (($status >> 8) | ($status & 0xff)) ;
+  }
+  else {
+    # second child
+    sleep $timeout;
+    print "ptimeout: killing @ARGV (pid $pid1) since timeout of $timeout expired\n";
+    kill 'TERM', $pid1;
+    exit 1;
+  }
+}
+else {
+  # first child
+  print "executing @ARGV\n";
+  exec @ARGV;
+}