diff options
Diffstat (limited to 't/spawn.t')
| -rw-r--r-- | t/spawn.t | 220 |
1 files changed, 197 insertions, 23 deletions
@@ -1,10 +1,13 @@ -# Copyright (C) 2015-2020 all contributors <meta@public-inbox.org> +#!perl -w +# Copyright (C) all contributors <meta@public-inbox.org> # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt> -use strict; -use warnings; +use v5.12; use Test::More; -use PublicInbox::Spawn qw(which spawn popen_rd); - +use PublicInbox::Spawn qw(which spawn popen_rd run_qx); +require PublicInbox::Sigfd; +require PublicInbox::DS; +use PublicInbox::OnDestroy; +my $rlimit_map = PublicInbox::Spawn->can('rlimit_map'); { my $true = which('true'); ok($true, "'true' command found with which()"); @@ -18,6 +21,71 @@ use PublicInbox::Spawn qw(which spawn popen_rd); } { + my $opt = { 0 => \'in', 2 => \(my $e) }; + my $out = run_qx(['sh', '-c', 'echo e >&2; cat'], undef, $opt); + is($e, "e\n", 'captured stderr'); + is($out, 'in', 'stdin read and stdout captured'); + $opt->{0} = \"IN\n3\nLINES"; + my @out = run_qx(['sh', '-c', 'echo E >&2; cat'], undef, $opt); + is($e, "E\n", 'captured stderr clobbers string'); + is_deeply(\@out, [ "IN\n", "3\n", 'LINES' ], 'stdout array'); +} + +SKIP: { + my $pid = spawn(['true'], undef, { pgid => 0 }); + ok($pid, 'spawned process with new pgid'); + is(waitpid($pid, 0), $pid, 'waitpid succeeds on spawned process'); + is($?, 0, 'true exited successfully'); + pipe(my ($r, $w)) or BAIL_OUT; + + # Find invalid PID to try to join its process group. + my $wrong_pgid = 1; + for (my $i=0x7fffffff; $i >= 2; $i--) { + if (kill(0, $i) == 0) { + $wrong_pgid = $i; + last; + } + } + + # Test spawn behavior when it can't join the requested process group. + $pid = eval { spawn(['true'], undef, { pgid => $wrong_pgid, 2 => $w }) }; + close $w; + my $err = do { local $/; <$r> }; + if (defined $pid) { + waitpid($pid, 0); + isnt($?, 0, 'child error (pure-Perl)'); + } else { + ok($@, 'exception raised'); + } +} + +{ # ensure waitpid(-1, 0) and SIGCHLD works in spawned process + my $script = <<'EOF'; +$| = 1; # unbuffer stdout +defined(my $pid = fork) or die "fork: $!"; +if ($pid == 0) { exit } +elsif ($pid > 0) { + my $waited = waitpid(-1, 0); + $waited == $pid or die "mismatched child $pid != $waited"; + $? == 0 or die "child err: $>"; + $SIG{CHLD} = sub { print "HI\n"; exit }; + print "RDY $$\n"; + select(undef, undef, undef, 0.01) while 1; +} +EOF + my $oldset = PublicInbox::DS::block_signals(); + my $rd = popen_rd([$^X, qw(-w -e), $script]); + diag 'waiting for child to reap grandchild...'; + chomp(my $line = readline($rd)); + my ($rdy, $pid) = split(/ /, $line); + is($rdy, 'RDY', 'got ready signal, waitpid(-1) works in child'); + ok(kill('CHLD', $pid), 'sent SIGCHLD to child'); + is(readline($rd), "HI\n", '$SIG{CHLD} works in child'); + ok($rd->close, 'popen_rd close works'); + PublicInbox::DS::sig_setmask($oldset); +} + +{ my ($r, $w); pipe $r, $w or die "pipe failed: $!"; my $pid = spawn(['echo', 'hello world'], undef, { 1 => fileno($w) }); @@ -40,56 +108,162 @@ use PublicInbox::Spawn qw(which spawn popen_rd); { my $fh = popen_rd([qw(echo hello)]); - ok(fileno($fh) >= 0, 'tied fileno works'); + ok(fileno($fh) >= 0, 'fileno works'); my $l = <$fh>; - is($l, "hello\n", 'tied readline works'); + is($l, "hello\n", 'readline works'); $l = <$fh>; - ok(!$l, 'tied readline works for EOF'); + ok(!$l, 'readline works for EOF'); } { my $fh = popen_rd([qw(printf foo\nbar)]); - ok(fileno($fh) >= 0, 'tied fileno works'); + ok(fileno($fh) >= 0, 'fileno works'); + is($fh->blocking(0), 1, '->blocking was true'); + is($fh->blocking, 0, '->blocking is false'); + is($fh->blocking(1), 0, '->blocking was true'); + is($fh->blocking, 1, '->blocking is true'); my @line = <$fh>; is_deeply(\@line, [ "foo\n", 'bar' ], 'wantarray works on readline'); } { my $fh = popen_rd([qw(echo hello)]); + like($fh->attached_pid, qr/\A[0-9]+\z/, 'have a PID'); my $buf; is(sysread($fh, $buf, 6), 6, 'sysread got 6 bytes'); - is($buf, "hello\n", 'tied gets works'); + is($buf, "hello\n", 'sysread works'); is(sysread($fh, $buf, 6), 0, 'sysread got EOF'); $? = 1; - ok(close($fh), 'close succeeds'); + ok($fh->close, 'close succeeds'); is($?, 0, '$? set properly'); + is($fh->attached_pid, undef, 'attached_pid cleared after close'); } { my $fh = popen_rd([qw(false)]); - ok(!close($fh), 'close fails on false'); + ok(!$fh->close, 'close fails on false'); isnt($?, 0, '$? set properly: '.$?); } +{ + local $ENV{GIT_CONFIG} = '/path/to/this/better/not/exist'; + my $fh = popen_rd([qw(env)], { GIT_CONFIG => undef }); + ok(!grep(/^GIT_CONFIG=/, <$fh>), 'GIT_CONFIG clobbered'); +} + +{ # ->CLOSE vs ->DESTROY waitpid caller distinction + my @c; + my $fh = popen_rd(['true'], undef, undef, sub { @c = caller }); + ok($fh->close, '->CLOSE fired and successful'); + ok(scalar(@c), 'callback fired by ->CLOSE'); + ok(grep(!m[/PublicInbox/DS\.pm\z], @c), 'callback not invoked by DS'); + + @c = (); + $fh = popen_rd(['true'], undef, undef, sub { @c = caller }); + undef $fh; # ->DESTROY + ok(scalar(@c), 'callback fired by ->DESTROY'); + ok(grep(!m[/PublicInbox/IO\.pm\z], @c), + 'callback not invoked by PublicInbox::IO'); +} + +{ # children don't wait on siblings + use POSIX qw(_exit); + pipe(my ($r, $w)) or BAIL_OUT $!; + my @arg; + my $fh = popen_rd(['cat'], undef, { 0 => $r }, + sub { @arg = @_; warn "x=$$\n" }, 'hi'); + my $pid = PublicInbox::OnDestroy::fork_tmp; + local $SIG{__WARN__} = sub { _exit(1) }; + if ($pid == 0) { + local $SIG{__DIE__} = sub { _exit(2) }; + undef $fh; + _exit(0); + } + waitpid($pid, 0); + is($?, 0, 'forked process exited'); + my @w; + local $SIG{__WARN__} = sub { push @w, @_ }; + close $w; + $fh->close; # may set $? + is($?, 0, 'cat exited'); + is(scalar(@arg), 2, 'callback got args'); + is($arg[1], 'hi', 'passed arg'); + like($arg[0], qr/\A\d+\z/, 'PID'); + is_deeply(\@w, [ "x=$$\n" ], 'callback fired from owner'); +} + SKIP: { - eval { - require BSD::Resource; - defined(BSD::Resource::RLIMIT_CPU()) - } or skip 'BSD::Resource::RLIMIT_CPU missing', 3; - my ($r, $w); - pipe($r, $w) or die "pipe: $!"; - my $cmd = ['sh', '-c', 'while true; do :; done']; + if ($rlimit_map) { # Inline::C installed + my %rlim = $rlimit_map->(); + ok defined($rlim{RLIMIT_CPU}), 'RLIMIT_CPU defined'; + } else { + eval { + require BSD::Resource; + defined(BSD::Resource::RLIMIT_CPU()) + } or skip 'BSD::Resource::RLIMIT_CPU missing', 3; + } + my $cmd = [ $^X, qw(-w -e), <<'EOM' ]; +use POSIX qw(:signal_h); +use Time::HiRes qw(time); # gettimeofday +my $have_bsd_resource = eval { require BSD::Resource }; +my $set = POSIX::SigSet->new; +$set->emptyset; # spawn() defaults to blocking all signals +sigprocmask(SIG_SETMASK, $set) or die "SIG_SETMASK: $!"; +my $tot = 0; +$SIG{XCPU} = sub { print "SIGXCPU $tot\n"; exit(1) }; +my $next = time + 1.1; +while (1) { + # OpenBSD needs some syscalls (e.g. `times', `gettimeofday' + # and `write' (via Perl warn)) on otherwise idle systems to + # hit RLIMIT_CPU and fire signals: + # https://marc.info/?i=02A4BB8D-313C-464D-845A-845EB6136B35@gmail.com + my @t = $have_bsd_resource ? BSD::Resource::times() : (0, 0); + $tot = $t[0] + $t[1]; + if (time > $next) { + warn "# T: @t (utime, ctime, cutime, cstime)\n" if @t; + $next = time + 1.1; + } +} +EOM + pipe(my($r, $w)) or die "pipe: $!"; my $fd = fileno($w); - my $opt = { RLIMIT_CPU => [ 1, 1 ], RLIMIT_CORE => [ 0, 0 ], 1 => $fd }; + my $opt = { RLIMIT_CPU => [ 1, 9 ], RLIMIT_CORE => [ 0, 0 ], 1 => $fd }; my $pid = spawn($cmd, undef, $opt); close $w or die "close(w): $!"; my $rset = ''; vec($rset, fileno($r), 1) = 1; ok(select($rset, undef, undef, 5), 'child died before timeout'); is(waitpid($pid, 0), $pid, 'XCPU child process reaped'); - isnt($?, 0, 'non-zero exit status'); + my $line; + like($line = readline($r), qr/SIGXCPU/, 'SIGXCPU handled') or + diag explain($line); + is($? >> 8, 1, 'non-zero exit status'); } -done_testing(); +SKIP: { + require PublicInbox::SpawnPP; + require File::Temp; + my $tmp = File::Temp->newdir('spawnpp-XXXX', TMPDIR => 1); + my $cmd = [ qw(/bin/sh -c), 'echo $HI >foo' ]; + my $env = [ 'HI=hihi' ]; + my $rlim = []; + my $pgid = -1; + my $pid = PublicInbox::SpawnPP::pi_fork_exec([], '/bin/sh', $cmd, $env, + $rlim, "$tmp", $pgid); + is(waitpid($pid, 0), $pid, 'spawned process exited'); + is($?, 0, 'no error'); + open my $fh, '<', "$tmp/foo" or die "open: $!"; + is(readline($fh), "hihi\n", 'env+chdir worked for SpawnPP'); + close $fh; + unlink("$tmp/foo") or die "unlink: $!"; + { + local $ENV{MOD_PERL} = 1; + $pid = PublicInbox::SpawnPP::pi_fork_exec([], + '/bin/sh', $cmd, $env, $rlim, "$tmp", $pgid); + } + is(waitpid($pid, 0), $pid, 'spawned process exited'); + open $fh, '<', "$tmp/foo" or die "open: $!"; + is(readline($fh), "hihi\n", 'env+chdir SpawnPP under (faked) MOD_PERL'); +} -1; +done_testing(); |