$CGI::DISABLE_UPLOADS= 1;
use CGI qw/:standard -private_tempfiles/;
-use IPC::Open2;
+use IO::Pipe;
use IO::Handle;
-use File::Temp;
#---------- pixmaps ----------
}
my $summary= pipeval($ppm,
- 'set -x; cat >&2',
'ppmtopgm',
'pnmscale -width 79',
'pnmnorm -bpercent 40 -wpercent 10',
- 'pgmtopbm -threshold');
+ 'pgmtopbm -threshold',
+ 'pbmtoascii'
+ );
print STDERR ">$summary<\n";
my ($val, @cmds) = @_;
my (@pids);
- my $paste_child= open PIPEVAL_PASTE, "-|";
- defined $paste_child or die $!;
- if (!$paste_child) { print $val or die $!; exit 0; }
-
- my $f= 'PIPEVAL_PASTE';
-
-$_=<$f>;
-print STDERR ">$_<\n";
-
- foreach my $cmd (@cmds) {
- my $newf;
-print STDERR "$cmd | $f\n";
- push @pids, open2($newf, "<& $f", $cmd);
-# if (@pids>1) { close $f or die $!; }
-print STDERR "$cmd | $f $newf @pids\n";
- $f= $newf;
+ my $lastpipe;
+
+ foreach my $cmd ('',@cmds) {
+ my $pipe= new IO::Pipe or die $!;
+ my $pid= fork(); defined $pid or die $!;
+
+ if (!$pid) {
+ $pipe->writer();
+ if (!$lastpipe) {
+ print $pipe $val or die $!;
+ exit 0;
+ } else {
+ open STDIN, '<&', $lastpipe or die $!;
+ open STDOUT, '>&', $pipe or die $!;
+ close $lastpipe or die $!;
+ close $pipe or die $!;
+ exec $cmd; die $!;
+ }
+ }
+ $pipe->reader();
+ if ($lastpipe) { close $lastpipe or die $!; }
+ $lastpipe= $pipe;
+ push @pids, $pid;
}
- $!=0; { local ($/)=undef; $val= <$f>; }
+ $!=0; { local ($/)=undef; $val= <$lastpipe>; }
defined $val or die $!;
- $f->error and die $!; close $f or die $!;
-
- waitpid($paste_child,0) == $paste_child or die "paste $? $!";
- $?==0 or $?==13 or die "paste $?";
- close PIPEVAL_PASTE or die $!;
+ $lastpipe->error and die $!; close $lastpipe or die $!;
- foreach my $cmd (@cmds) {
+ foreach my $cmd ('(paste)', @cmds) {
my $pid= shift @pids;
waitpid($pid,0) == $pid or die "$pid $? $!";
$?==0 or $?==13 or die "$cmd $?";
+print STDERR "OK $cmd\n";
}
return $val;
}