[pmg-devel] [PATCH pmg-api 1/2] fix #4811: who regex: test validity on save

[Dominik Csapak <d.csapak@proxmox.com>]

and warn only when it's an invalid regex on execution, because users may
have previously had such rules. Otherwise, pmg-smtp-filter will restart
every time it encounters such a rule.

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
 src/PMG/RuleDB/WhoRegex.pm | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/PMG/RuleDB/WhoRegex.pm b/src/PMG/RuleDB/WhoRegex.pm
index 5c13604..1db6418 100644
--- a/src/PMG/RuleDB/WhoRegex.pm
+++ b/src/PMG/RuleDB/WhoRegex.pm
@@ -60,6 +60,11 @@ sub save {
     defined($self->{address}) || die "undefined address: ERROR";
 
     my $adr = $self->{address};
+
+    # test regex for validity
+    eval { "" =~ /^$adr$/i; };
+    die "invalid regex: $@\n" if $@;
+
     $adr =~ s/\\/\\\\/g;
     $adr = encode('UTF-8', $adr);
 
@@ -100,7 +105,12 @@ sub who_match {
 
     my $t = $self->address;
 
-    return $addr =~ m/^$t$/i;
+    my $res = '';
+    eval {
+	$res = $addr =~ m/^$t$/i;
+    };
+    warn "invalid regex: $@\n" if $@;
+    return $res;
 }
 
 sub address { 
-- 
2.30.2