Set the DEBUG environment variable to 0/1 instead of ""/1.

2 files changed, 3 insertions, 2 deletions

diff --git a/Changelog b/Changelog
index 5dd416a..0f9b6ca 100644
--- a/Changelog
+++ b/Changelog
@@ -54,6 +54,7 @@ lacme (0.7.1) upstream;
  - webserver: reopen stdin from /dev/null.
  - Use 'acme-challenge.XXXXXXXXXX' as template for the temporary ACME
    challenge directory.
+ - Set the DEBUG environment variable to 0/1 instead of ""/1.
 
  -- Guilhem Moulin <guilhem@fripost.org>  Wed, 09 Dec 2020 18:23:22 +0100
 
diff --git a/lacme b/lacme
index 354a4a0..d2d8840 100755
--- a/lacme
+++ b/lacme
@@ -376,7 +376,7 @@ sub spawn_webserver() {
             drop_privileges($conf->{user}, $conf->{group}, $tmpdir);
             open STDIN, '<', '/dev/null' or die "open(/dev/null): $!";
             set_FD_CLOEXEC($sock, 0);
-            $ENV{DEBUG} = $OPTS{debug};
+            $ENV{DEBUG} = $OPTS{debug} // 0;
             # use execve(2) rather than a Perl pseudo-process to ensure that
             # the child doesn't have access to the parent's memory
             exec $conf->{command}, fileno($sock) or die;
@@ -552,7 +552,7 @@ sub acme_client($@) {
         drop_privileges($conf->{user}, $conf->{group}, $args->{chdir} // '/');
         set_FD_CLOEXEC($_, 0) foreach ($CONFFILE, $client);
         seek($CONFFILE, SEEK_SET, 0) or die "seek: $!";
-        $ENV{DEBUG} = $OPTS{debug};
+        $ENV{DEBUG} = $OPTS{debug} // 0;
     }}, $conf->{command}, $COMMAND, @fileno, @args);
 
     if (defined $cleanup) {