AIX doesn't have a 'top' command. Well, I'd like to create an emulation for it using perl and "ps guw" piped to sort. I have the following so far: 
...
my $pid = fork(); # spawn child

if ( $pid ) { # parent
  while ( wait != -1 ) {
    while (<>) {
      print "Got $_ on STDIN\n";
    }
  }
} else {  # child
  while ( 1 ) {
    print $header;
    print `ps guw | sort -n -r -k $sort_option | head -$num_lines`;
    print "\nSort: $sort_option : Lines: $num_lines : Sleep: $sleep_ti
+me\n";
    sleep $sleep_time;
    print `clear`;
  }
}

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Pretty rudimentary, but what I would like to do is have the parent process listen for STDIN, like top does, and send a SIGHUP to the child to reset it's sort options, lines or whatnot. The while (<>) { doesn't seem to be working like I'd hoped. Any ideas on this one?

In reply to Emulating UNIX 'top' on AIX by Transient

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