[PATCH 10/11] lei: use sleep(1) loop for infinite sleep

[Eric Wong <e@80x24.org>]

Perl may internally race and miss signals due to a lack of
self-pipe / eventfd / signalfd / EVFILT_SIGNAL usage.  While our
event loop paths avoid these problems by using signalfd or
EVFILT_SIGNAL, thse sleep() calls are not within the event loop.
---
 lib/PublicInbox/LEI.pm | 2 +-
 script/lei             | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index 005f6f7a..28dce0c5 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -299,7 +299,7 @@ sub x_it ($$) {
 		if (my $signum = ($code & 127)) { # usually SIGPIPE (13)
 			$SIG{PIPE} = 'DEFAULT'; # $SIG{$signum} doesn't work
 			kill $signum, $$;
-			sleep; # wait for signal
+			sleep(1) while 1; # wait for signal
 		} else {
 			$quit->($code >> 8);
 		}
diff --git a/script/lei b/script/lei
index 58f0dbe9..40c21ad8 100755
--- a/script/lei
+++ b/script/lei
@@ -116,7 +116,7 @@ Falling back to (slow) one-shot mode
 	sigchld();
 	if (my $sig = ($x_it_code & 127)) {
 		kill $sig, $$;
-		sleep;
+		sleep(1) while 1;
 	}
 	exit($x_it_code >> 8);
 } else { # for systems lacking Socket::MsgHdr or Inline::C