lei: test SIGPIPE, stop xsearch workers on client abort

The new test ensures consistency between oneshot and
client/daemon users.  Cancelling an in-progress result now also
stops xsearch workers to avoid wasted CPU and I/O.

Note the lei->atfork_child_wq usage changes, it is to workaround
a bug in Perl 5: http://nntp.perl.org/group/perl.perl5.porters/258784
<CAHhgV8hPbcmkzWizp6Vijw921M5BOXixj4+zTh3nRS9vRBYk8w@mail.gmail.com>

This switches the internal protocol to use SOCK_SEQPACKET
AF_UNIX sockets to prevent merging messages from the daemon to
client to run pager and kill/exit the client script.

1 files changed, 1 insertions, 1 deletions

diff --git a/t/lei.t b/t/lei.t
index 6819f182..3ebaade6 100644
--- a/t/lei.t
+++ b/t/lei.t
@@ -215,7 +215,7 @@ SKIP: { # real socket
         skip 'Socket::MsgHdr or Inline::C missing or unconfigured', $nr;
 
         local $ENV{XDG_RUNTIME_DIR} = "$home/xdg_run";
-        my $sock = "$ENV{XDG_RUNTIME_DIR}/lei/$nfd.sock";
+        my $sock = "$ENV{XDG_RUNTIME_DIR}/lei/$nfd.seq.sock";
 
         ok($lei->('daemon-pid'), 'daemon-pid');
         is($err, '', 'no error from daemon-pid');