You need to handle SIGCHLD signals. When a child process exits, the parent gets a SIGCHLD. There, you call waitpid() to get the exit status of the child.

This is from my own Tk based mp3 player:

#start a new song
    $SIG{'CHLD'} = 'sig_child';
    if ($pid = fork) {
        $w::main->configure( -title => "TkMP3 - $fnm" );
        $w::title->configure( -text => $fnm );
    } elsif (defined $pid) {
        exec 'kmp3player','-q','-b','256',$fnm;
    } else {
        die "Can't fork: $!\n";
    }

# the child exit handler
sub sig_child {
    $wsts = waitpid($pid,WNOHANG);
    $sts = $?;
    if ($wsts == 0) {
        $SIG{'CHLD'} = 'sig_child';
        return;
    }
    die "Child exited abnormally, exiting\n" if $sts != 0;
# send notification to app to pick next song
#....

[download]
} 
---
print map { my ($m)=1<<hex($_)&11?' ':'';
$m.=substr('AHJPacehklnorstu',hex($_),1) }
split //,'2fde0abe76c36c914586c';

[download]

In reply to Re: tk player with system/exec by pfaut
in thread tk player with system/exec by mce

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