RT 3.8.13

[freeside.git] / rt / bin / webmux.pl.in

diff --git a/rt/bin/webmux.pl.in b/rt/bin/webmux.pl.in
index 7aae041..296f649 100644 (file)
--- a/rt/bin/webmux.pl.in
+++ b/rt/bin/webmux.pl.in
@@ -60,24 +60,25 @@ package RT::Mason;
 
 our ($Nobody, $SystemUser, $Handler, $r);
 
-my $protect_fd;
+my $protect_fds;
 
 sub handler {
     ($r) = @_;
 
-    if ( !$protect_fd && $ENV{'MOD_PERL'} && exists $ENV{'MOD_PERL_API_VERSION'}
-        && $ENV{'MOD_PERL_API_VERSION'} >= 2 && fileno(STDOUT) != 1
+    if ( !$protect_fds && $ENV{'MOD_PERL'} && exists $ENV{'MOD_PERL_API_VERSION'}
+        && $ENV{'MOD_PERL_API_VERSION'} >= 2
     ) {
-        # under mod_perl2, STDOUT gets closed and re-opened, however new STDOUT
-        # is not on FD #1. In this case next IO operation will occupy this FD
-        # and make all system() and open "|-" dangerouse, for example DBI
-        # can get this FD for DB connection and system() call will close
-        # by putting grabage into the socket
-        open( $protect_fd, '>', '/dev/null' )
-          or die "Couldn't open /dev/null: $!";
-        unless ( fileno($protect_fd) == 1 ) {
-            warn "We opened /dev/null to protect FD #1, but descriptor #1 is already occupied";
-        }
+        # under mod_perl2, STDIN and STDOUT get closed and re-opened,
+        # however they are not on FD 0 and 1.  In this case, the next
+        # socket that gets opened will occupy one of these FDs, and make
+        # all system() and open "|-" calls dangerous; for example, the
+        # DBI handle can get this FD, which later system() calls will
+        # close by putting garbage into the socket.
+        $protect_fds = [];
+        push @{$protect_fds}, IO::Handle->new_from_fd(0, "r")
+            if fileno(STDIN) != 0;
+        push @{$protect_fds}, IO::Handle->new_from_fd(1, "w")
+            if fileno(STDOUT) != 1;
     }
 
     local $SIG{__WARN__};