120 lines
3.3 KiB
Perl
120 lines
3.3 KiB
Perl
package StartXServer;
|
||
# vim:ts=4:sw=4:expandtab
|
||
|
||
use strict;
|
||
use warnings;
|
||
use Exporter 'import';
|
||
use Time::HiRes qw(sleep);
|
||
use i3test::Util qw(slurp);
|
||
use v5.10;
|
||
|
||
our @EXPORT = qw(start_xserver);
|
||
|
||
my @pids;
|
||
my $x_socketpath = '/tmp/.X11-unix/X';
|
||
|
||
# forks an X server process
|
||
sub fork_xserver {
|
||
my $keep_xserver_output = shift;
|
||
my $displaynum = shift;
|
||
my $pid = fork();
|
||
die "Could not fork: $!" unless defined($pid);
|
||
if ($pid == 0) {
|
||
# Child, close stdout/stderr, then start Xephyr
|
||
if (!$keep_xserver_output) {
|
||
close STDOUT;
|
||
close STDERR;
|
||
}
|
||
|
||
exec @_;
|
||
exit 1;
|
||
}
|
||
push(@complete_run::CLEANUP, sub {
|
||
kill(15, $pid);
|
||
# Unlink the X11 socket, Xdmx seems to leave it there.
|
||
unlink($x_socketpath . $displaynum);
|
||
});
|
||
|
||
push @pids, $pid;
|
||
|
||
return $x_socketpath . $displaynum;
|
||
}
|
||
|
||
# Blocks until the socket paths specified in the given array reference actually
|
||
# exist.
|
||
sub wait_for_x {
|
||
my ($sockets_waiting) = @_;
|
||
|
||
# Wait until Xdmx actually runs. Pretty ugly solution, but as long as we
|
||
# can’t socket-activate X11…
|
||
while (1) {
|
||
@$sockets_waiting = grep { ! -S $_ } @$sockets_waiting;
|
||
last unless @$sockets_waiting;
|
||
sleep 0.1;
|
||
}
|
||
}
|
||
|
||
=head2 start_xserver($parallel)
|
||
|
||
Starts C<$parallel> (or number of cores * 2 if undef) Xephyr processes (see
|
||
https://www.freedesktop.org/wiki/Software/Xephyr/) and returns two arrayrefs: a
|
||
list of X11 display numbers to the Xephyr processes and a list of PIDs of the
|
||
processes.
|
||
|
||
=cut
|
||
|
||
sub start_xserver {
|
||
my ($parallel, $numtests, $keep_xserver_output) = @_;
|
||
|
||
my @displays = ();
|
||
my @childpids = ();
|
||
|
||
# Yeah, I know it’s non-standard, but Perl’s POSIX module doesn’t have
|
||
# _SC_NPROCESSORS_CONF.
|
||
my $num_cores;
|
||
if (-e '/proc/cpuinfo') {
|
||
my $cpuinfo = slurp('/proc/cpuinfo');
|
||
$num_cores = scalar grep { /model name/ } split("\n", $cpuinfo);
|
||
}
|
||
# If /proc/cpuinfo does not exist, we fall back to 2 cores.
|
||
$num_cores ||= 2;
|
||
|
||
# If unset, we use num_cores * 2.
|
||
$parallel ||= ($num_cores * 2);
|
||
|
||
# If we are running a small number of tests, don’t over-parallelize.
|
||
$parallel = $numtests if $numtests < $parallel;
|
||
|
||
# First get the last used display number, then increment it by one.
|
||
# Effectively falls back to 1 if no X server is running.
|
||
my ($displaynum) = reverse sort { $a <=> $b } map{ /(\d+)$/ } glob($x_socketpath . '*');
|
||
$displaynum++;
|
||
|
||
say "Starting $parallel Xephyr instances, starting at :$displaynum...";
|
||
|
||
$SIG{CHLD} = sub {
|
||
my $child = waitpid -1, POSIX::WNOHANG;
|
||
@pids = grep { $_ != $child } @pids;
|
||
return unless @pids == 0;
|
||
print STDERR "All X server processes died.\n";
|
||
print STDERR "Use ./complete-run.pl --parallel 1 --keep-xserver-output\n";
|
||
exit 1;
|
||
};
|
||
|
||
my @sockets_waiting;
|
||
for (1 .. $parallel) {
|
||
my $socket = fork_xserver($keep_xserver_output, $displaynum,
|
||
'Xephyr', ":$displaynum", '-screen', '1280x800',
|
||
'-nolisten', 'tcp', '-name', "i3test");
|
||
push(@displays, ":$displaynum");
|
||
push(@sockets_waiting, $socket);
|
||
$displaynum++;
|
||
}
|
||
|
||
wait_for_x(\@sockets_waiting);
|
||
|
||
return @displays;
|
||
}
|
||
|
||
1
|