From 8faab5db6571972156f45b5838b23dbb0fadd5c4 Mon Sep 17 00:00:00 2001
From: Guilhem Moulin <guilhem@fripost.org>
Date: Thu, 1 Dec 2016 10:41:33 +0100
Subject: lacme: avoid spawning multiple accountd processes.

---
 lacme | 44 ++++++++++++++++++++++++--------------------
 1 file changed, 24 insertions(+), 20 deletions(-)

diff --git a/lacme b/lacme
index 839d53d..cf2f9eb 100755
--- a/lacme
+++ b/lacme
@@ -395,6 +395,7 @@ sub spawn_webserver() {
 # If $args->{in} is defined, the data is written to the client's STDIN.
 # If $args->{out} is defined, its value is set to client's STDOUT data.
 #
+my $ACCOUNTD = 0;
 sub acme_client($@) {
     my $args = shift;
     my @args = @_;
@@ -402,27 +403,30 @@ sub acme_client($@) {
     my $client;
     my $conf = $CONFIG->{client};
     if (defined (my $accountd = $CONFIG->{accountd})) {
-        socketpair($client, my $s, AF_UNIX, SOCK_STREAM, PF_UNSPEC) or die "socketpair: $!";
-        my $pid = fork() // "fork: $!";
-        unless ($pid) {
-            drop_privileges($accountd->{user}, $accountd->{group}, '/');
-            set_FD_CLOEXEC($s, 0);
-            $client->close() or die "Can't close: $!";
-            my @cmd = ($accountd->{command}, '--fdopen='.fileno($s));
-            push @cmd, '--config='.$accountd->{config}   if defined $accountd->{config};
-            push @cmd, '--privkey='.$accountd->{privkey} if defined $accountd->{privkey};
-            push @cmd, '--quiet' unless lc $accountd->{quiet} eq 'no';
-            push @cmd, '--debug' if $OPTS{debug};
-            exec { $cmd[0] } @cmd or die;
+        unless ($ACCOUNTD) {
+            socketpair($client, my $s, AF_UNIX, SOCK_STREAM, PF_UNSPEC) or die "socketpair: $!";
+            my $pid = fork() // "fork: $!";
+            unless ($pid) {
+                drop_privileges($accountd->{user}, $accountd->{group}, '/');
+                set_FD_CLOEXEC($s, 0);
+                $client->close() or die "Can't close: $!";
+                my @cmd = ($accountd->{command}, '--fdopen='.fileno($s));
+                push @cmd, '--config='.$accountd->{config}   if defined $accountd->{config};
+                push @cmd, '--privkey='.$accountd->{privkey} if defined $accountd->{privkey};
+                push @cmd, '--quiet' unless lc $accountd->{quiet} eq 'no';
+                push @cmd, '--debug' if $OPTS{debug};
+                exec { $cmd[0] } @cmd or die;
+            }
+            print STDERR "[$$] Forking lacme-accountd, child PID $pid\n" if $OPTS{debug};
+            $ACCOUNTD = $pid;
+            $s->close() or die "Can't close: $!";
+            push @CLEANUP, sub() {
+                print STDERR "[$$] Shutting down lacme-accountd\n" if $OPTS{debug};
+                shutdown($client, SHUT_RDWR) or warn "shutdown: $!";
+                kill 15 => $pid;
+                waitpid $pid => 0;
+            };
         }
-        print STDERR "[$$] Forking lacme-accountd, child PID $pid\n" if $OPTS{debug};
-        $s->close() or die "Can't close: $!";
-        push @CLEANUP, sub() {
-            print STDERR "[$$] Shutting down lacme-accountd\n" if $OPTS{debug};
-            shutdown($client, SHUT_RDWR) or warn "shutdown: $!";
-            kill 15 => $pid;
-            waitpid $pid => 0;
-        };
     }
     else {
         my @stat;
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