1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
| | # Copyright (C) 2015-2018 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
use Fcntl qw(FD_CLOEXEC F_SETFD F_GETFD);
use POSIX qw(dup2);
sub stream_to_string {
my ($res) = @_;
my $body = $res->[2];
my $str = '';
while (defined(my $chunk = $body->getline)) {
$str .= $chunk;
}
$body->close;
$str;
}
sub spawn_listener {
my ($env, $cmd, $socks) = @_;
my $pid = fork;
defined $pid or die "fork failed: $!\n";
if ($pid == 0) {
# pretend to be systemd (cf. sd_listen_fds(3))
my $fd = 3; # 3 == SD_LISTEN_FDS_START
foreach my $s (@$socks) {
my $fl = fcntl($s, F_GETFD, 0);
if (($fl & FD_CLOEXEC) != FD_CLOEXEC) {
warn "got FD:".fileno($s)." w/o CLOEXEC\n";
}
fcntl($s, F_SETFD, $fl &= ~FD_CLOEXEC);
dup2(fileno($s), $fd++) or die "dup2 failed: $!\n";
}
$ENV{LISTEN_PID} = $$;
$ENV{LISTEN_FDS} = scalar @$socks;
%ENV = (%ENV, %$env) if $env;
exec @$cmd;
die "FAIL: ",join(' ', @$cmd), ": $!\n";
}
$pid;
}
1;
|