maildrop: clean up a dotlock file if exited while it is held.

Implement exit() by throwing an exception, which will wind up and clean
up the dotlock. Catch the exception and exit(), after everything gets
cleaned up.

1 files changed, 5 insertions, 1 deletions

diff --git a/maildrop/alarmsleep.C b/maildrop/alarmsleep.C
index 4b4074a..610258e 100644
--- a/maildrop/alarmsleep.C
+++ b/maildrop/alarmsleep.C
@@ -5,10 +5,14 @@
 
 AlarmSleep::AlarmSleep(unsigned nseconds) : flag(0)
 {
+	sigset_t ss;
+
+	sigemptyset(&ss);
+
 	Set(nseconds);
 	do
 	{
-		sigpause(0);
+		sigsuspend(&ss);
 	} while (!flag);
 	Cancel();
 }