mirror of
https://github.com/git/git
synced 2024-10-28 19:25:47 +00:00
18d8c26930
When resuming, git-am detects if we are trying to feed it patches or not by checking if stdin is a TTY. However, the test library redirects stdin to /dev/null. This makes it difficult, for instance, to test the behavior of "git am -3" when resuming, as git-am will think we are trying to feed it patches and error out. Support this use case by extending test-terminal.perl to create a pseudo-tty for the child process' standard input as well. Note that due to the way the code is structured, the child's stdin pseudo-tty will be closed when we finish reading from our stdin. This means that in the common case, where our stdin is attached to /dev/null, the child's stdin pseudo-tty will be closed immediately. Some operations like isatty(), which git-am uses, require the file descriptor to be open, and hence if the success of the command depends on such functions, test_terminal's stdin should be redirected to a source with large amount of data to ensure that the child's stdin is not closed, e.g. test_terminal git am --3way </dev/zero Cc: Jonathan Nieder <jrnieder@gmail.com> Cc: Jeff King <peff@peff.net> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
104 lines
2.3 KiB
Perl
Executable file
104 lines
2.3 KiB
Perl
Executable file
#!/usr/bin/perl
|
|
use 5.008;
|
|
use strict;
|
|
use warnings;
|
|
use IO::Pty;
|
|
use File::Copy;
|
|
|
|
# Run @$argv in the background with stdio redirected to $in, $out and $err.
|
|
sub start_child {
|
|
my ($argv, $in, $out, $err) = @_;
|
|
my $pid = fork;
|
|
if (not defined $pid) {
|
|
die "fork failed: $!"
|
|
} elsif ($pid == 0) {
|
|
open STDIN, "<&", $in;
|
|
open STDOUT, ">&", $out;
|
|
open STDERR, ">&", $err;
|
|
close $in;
|
|
close $out;
|
|
exec(@$argv) or die "cannot exec '$argv->[0]': $!"
|
|
}
|
|
return $pid;
|
|
}
|
|
|
|
# Wait for $pid to finish.
|
|
sub finish_child {
|
|
# Simplified from wait_or_whine() in run-command.c.
|
|
my ($pid) = @_;
|
|
|
|
my $waiting = waitpid($pid, 0);
|
|
if ($waiting < 0) {
|
|
die "waitpid failed: $!";
|
|
} elsif ($? & 127) {
|
|
my $code = $? & 127;
|
|
warn "died of signal $code";
|
|
return $code + 128;
|
|
} else {
|
|
return $? >> 8;
|
|
}
|
|
}
|
|
|
|
sub xsendfile {
|
|
my ($out, $in) = @_;
|
|
|
|
# Note: the real sendfile() cannot read from a terminal.
|
|
|
|
# It is unspecified by POSIX whether reads
|
|
# from a disconnected terminal will return
|
|
# EIO (as in AIX 4.x, IRIX, and Linux) or
|
|
# end-of-file. Either is fine.
|
|
copy($in, $out, 4096) or $!{EIO} or die "cannot copy from child: $!";
|
|
}
|
|
|
|
sub copy_stdin {
|
|
my ($in) = @_;
|
|
my $pid = fork;
|
|
if (!$pid) {
|
|
xsendfile($in, \*STDIN);
|
|
exit 0;
|
|
}
|
|
close($in);
|
|
return $pid;
|
|
}
|
|
|
|
sub copy_stdio {
|
|
my ($out, $err) = @_;
|
|
my $pid = fork;
|
|
defined $pid or die "fork failed: $!";
|
|
if (!$pid) {
|
|
close($out);
|
|
xsendfile(\*STDERR, $err);
|
|
exit 0;
|
|
}
|
|
close($err);
|
|
xsendfile(\*STDOUT, $out);
|
|
finish_child($pid) == 0
|
|
or exit 1;
|
|
}
|
|
|
|
if ($#ARGV < 1) {
|
|
die "usage: test-terminal program args";
|
|
}
|
|
my $master_in = new IO::Pty;
|
|
my $master_out = new IO::Pty;
|
|
my $master_err = new IO::Pty;
|
|
$master_in->set_raw();
|
|
$master_out->set_raw();
|
|
$master_err->set_raw();
|
|
$master_in->slave->set_raw();
|
|
$master_out->slave->set_raw();
|
|
$master_err->slave->set_raw();
|
|
my $pid = start_child(\@ARGV, $master_in->slave, $master_out->slave, $master_err->slave);
|
|
close $master_in->slave;
|
|
close $master_out->slave;
|
|
close $master_err->slave;
|
|
my $in_pid = copy_stdin($master_in);
|
|
copy_stdio($master_out, $master_err);
|
|
my $ret = finish_child($pid);
|
|
# If the child process terminates before our copy_stdin() process is able to
|
|
# write all of its data to $master_in, the copy_stdin() process could stall.
|
|
# Send SIGTERM to it to ensure it terminates.
|
|
kill 'TERM', $in_pid;
|
|
finish_child($in_pid);
|
|
exit($ret);
|