kill TERM pipe program on timeout

[Biblio-RFID.git] / lib / Biblio / RFID / Reader / librfid.pm

diff --git a/lib/Biblio/RFID/Reader/librfid.pm b/lib/Biblio/RFID/Reader/librfid.pm
index 0f559fd..8f6a96d 100644 (file)
--- a/lib/Biblio/RFID/Reader/librfid.pm
+++ b/lib/Biblio/RFID/Reader/librfid.pm
@@ -44,8 +44,20 @@ sub init { 1 }
 sub _grep_tool {
        my ( $bin, $param, $coderef, $path ) = @_;
 
+       my $timeout = 3; # s
+
+       eval {
+
        warn "# _grep_tool $bin $param\n";
-       open(my $s, '-|', "$bin $param 2>/dev/null") || die $!;
+#      $param .= ' 2>/dev/null';
+       my $pipe_pid = open(my $s, '-|', "$bin $param") || die $!;
+
+       local $SIG{ALRM} = sub {
+               warn "TIMEOUT!";
+               kill TERM => $pipe_pid;
+               die "timeout\n"
+       };
+       alarm $timeout;
 
        my $sid;
        my $iso;
@@ -65,8 +77,12 @@ sub _grep_tool {
                $coderef->( $sid, $iso );
        }
 
+       alarm(0);
        close($s);
-       if ( $? >> 8 ) {
+
+       }; # eval
+
+       if ( $? >> 8 || $@ ) {
                my $lsusb = `lsusb -d 076b:`;
                if ( $lsusb =~ m/\S+\s+(\d+)\s+\S+\s+(\d+)/ ) {
                        my $cmd = "usbreset /dev/bus/usb/$1/$2";