PublicInbox::Spawn->can('send_cmd4');
};
-sub sigchld {
- my ($sig) = @_;
- my $flags = $sig ? POSIX::WNOHANG() : 0;
- while (waitpid(-1, $flags) > 0) {}
-}
+my %pids;
+my $sigchld = sub {
+ my $flags = scalar(@_) ? POSIX::WNOHANG() : 0;
+ for my $pid (keys %pids) {
+ delete($pids{$pid}) if waitpid($pid, $flags) == $pid;
+ }
+};
-sub exec_cmd {
+my $exec_cmd = sub {
my ($fds, $argc, @argv) = @_;
my @old = (*STDIN{IO}, *STDOUT{IO}, *STDERR{IO});
my @rdr;
push @rdr, shift(@old), $tmpfh;
}
require POSIX; # WNOHANG
- $SIG{CHLD} = \&sigchld;
+ $SIG{CHLD} = $sigchld;
my $pid = fork // die "fork: $!";
if ($pid == 0) {
my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
}
%ENV = (%ENV, %env);
exec(@argv);
- die "exec: @argv: $!";
+ warn "exec: @argv: $!\n";
+ POSIX::_exit(1);
}
-}
+ $pids{$pid} = 1;
+};
if ($send_cmd && eval {
my $path = do {
while (my ($k, $v) = each %ENV) { $buf .= "\0$k=$v" }
$buf .= "\0\0";
my $n = $send_cmd->($sock, [0, 1, 2, fileno($dh)], $buf, MSG_EOR);
- if (!$n && $!{ETOOMANYREFS} && eval { require BSD::Resource }) {
- my $NOFILE = BSD::Resource::RLIMIT_NOFILE();
- my ($s, $h) = BSD::Resource::getrlimit($NOFILE);
- if ($s < $h && BSD::Resource::setrlimit($NOFILE, $h, $h)) {
- $n = $send_cmd->($sock, [0, 1, 2, fileno($dh)],
- $buf, MSG_EOR);
- }
- }
if (!$n) {
die "sendmsg: $! (check RLIMIT_NOFILE)\n" if $!{ETOOMANYREFS};
die "sendmsg: $!\n";
die "recvmsg: $!";
}
last if $buf eq '';
- if ($buf =~ /\Ax_it ([0-9]+)\z/) {
+ if ($buf =~ /\Aexec (.+)\z/) {
+ $exec_cmd->(\@fds, split(/\0/, $1));
+ } elsif ($buf eq '-WINCH') {
+ kill($buf, $$); # for MUA
+ } elsif ($buf =~ /\Ax_it ([0-9]+)\z/) {
$x_it_code = $1 + 0;
last;
} elsif ($buf =~ /\Achild_error ([0-9]+)\z/) {
$x_it_code = $1 + 0;
- } elsif ($buf =~ /\Aexec (.+)\z/) {
- exec_cmd(\@fds, split(/\0/, $1));
} else {
- sigchld();
+ $sigchld->();
die $buf;
}
}
- sigchld();
+ $sigchld->();
if (my $sig = ($x_it_code & 127)) {
kill $sig, $$;
- sleep;
+ sleep(1) while 1;
}
exit($x_it_code >> 8);
} else { # for systems lacking Socket::MsgHdr or Inline::C