| 1 | #!/usr/bin/perl |
| 2 | require v5.26; |
| 3 | use strict; |
| 4 | use warnings; |
| 5 | use IO::Pty; |
| 6 | use File::Copy; |
| 7 | |
| 8 | # Run @$argv in the background with stdio redirected to $out and $err. |
| 9 | sub start_child { |
| 10 | my ($argv, $out, $err) = @_; |
| 11 | my $pid = fork; |
| 12 | if (not defined $pid) { |
| 13 | die "fork failed: $!" |
| 14 | } elsif ($pid == 0) { |
| 15 | open STDOUT, ">&", $out; |
| 16 | open STDERR, ">&", $err; |
| 17 | close $out; |
| 18 | exec(@$argv) or die "cannot exec '$argv->[0]': $!" |
| 19 | } |
| 20 | return $pid; |
| 21 | } |
| 22 | |
| 23 | # Wait for $pid to finish. |
| 24 | sub finish_child { |
| 25 | # Simplified from wait_or_whine() in run-command.c. |
| 26 | my ($pid) = @_; |
| 27 | |
| 28 | my $waiting = waitpid($pid, 0); |
| 29 | if ($waiting < 0) { |
| 30 | die "waitpid failed: $!"; |
| 31 | } elsif ($? & 127) { |
| 32 | my $code = $? & 127; |
| 33 | warn "died of signal $code"; |
| 34 | return $code + 128; |
| 35 | } else { |
| 36 | return $? >> 8; |
| 37 | } |
| 38 | } |
| 39 | |
| 40 | sub xsendfile { |
| 41 | my ($out, $in) = @_; |
| 42 | |
| 43 | # Note: the real sendfile() cannot read from a terminal. |
| 44 | |
| 45 | # It is unspecified by POSIX whether reads |
| 46 | # from a disconnected terminal will return |
| 47 | # EIO (as in AIX 4.x, IRIX, and Linux) or |
| 48 | # end-of-file. Either is fine. |
| 49 | copy($in, $out, 4096) or $!{EIO} or die "cannot copy from child: $!"; |
| 50 | } |
| 51 | |
| 52 | sub copy_stdio { |
| 53 | my ($out, $err) = @_; |
| 54 | my $pid = fork; |
| 55 | defined $pid or die "fork failed: $!"; |
| 56 | if (!$pid) { |
| 57 | close($out); |
| 58 | xsendfile(\*STDERR, $err); |
| 59 | exit 0; |
| 60 | } |
| 61 | close($err); |
| 62 | xsendfile(\*STDOUT, $out); |
| 63 | finish_child($pid) == 0 |
| 64 | or exit 1; |
| 65 | } |
| 66 | |
| 67 | if ($#ARGV < 1) { |
| 68 | die "usage: test-terminal program args"; |
| 69 | } |
| 70 | $ENV{TERM} = 'vt100'; |
| 71 | my $parent_out = new IO::Pty; |
| 72 | my $parent_err = new IO::Pty; |
| 73 | $parent_out->set_raw(); |
| 74 | $parent_err->set_raw(); |
| 75 | $parent_out->slave->set_raw(); |
| 76 | $parent_err->slave->set_raw(); |
| 77 | my $pid = start_child(\@ARGV, $parent_out->slave, $parent_err->slave); |
| 78 | close $parent_out->slave; |
| 79 | close $parent_err->slave; |
| 80 | copy_stdio($parent_out, $parent_err); |
| 81 | my $ret = finish_child($pid); |
| 82 | exit($ret); |