2 # Copyright (C) 2020-2021 all contributors <meta@public-inbox.org>
3 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
6 use Socket qw(AF_UNIX SOCK_STREAM pack_sockaddr_un);
7 use PublicInbox::CmdIPC4;
9 my $recv_cmd = PublicInbox::CmdIPC4->can('recv_cmd4');
10 my $send_cmd = PublicInbox::CmdIPC4->can('send_cmd4') // do {
11 require PublicInbox::Spawn; # takes ~50ms even if built *sigh*
13 $recv_cmd = PublicInbox::Spawn->can('recv_cmd4');
14 PublicInbox::Spawn->can('send_cmd4');
18 my ($fds, $argc, @argv) = @_;
19 my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
20 my @m = (*STDIN{IO}, '<&=', *STDOUT{IO}, '>&=',
23 my ($old_io, $mode) = splice(@m, 0, 2);
24 open($old_io, $mode, $fd) or die "open $mode$fd: $!";
28 die "exec: @argv: $!";
32 if ($send_cmd && eval {
34 my $runtime_dir = ($ENV{XDG_RUNTIME_DIR} // '') . '/lei';
35 if ($runtime_dir eq '/lei') {
37 $runtime_dir = File::Spec->tmpdir."/lei-$<";
39 unless (-d $runtime_dir) {
41 File::Path::mkpath($runtime_dir, 0, 0700);
43 "$runtime_dir/$narg.sock";
45 my $addr = pack_sockaddr_un($path);
46 socket($sock, AF_UNIX, SOCK_STREAM, 0) or die "socket: $!";
47 unless (connect($sock, $addr)) { # start the daemon if not started
48 local $ENV{PERL5LIB} = join(':', @INC);
49 open(my $daemon, '-|', $^X, qw[-MPublicInbox::LEI
50 -E PublicInbox::LEI::lazy_start(@ARGV)],
51 $path, $! + 0, $narg) or die "popen: $!";
52 while (<$daemon>) { warn $_ } # EOF when STDERR is redirected
53 close($daemon) or warn <<"";
54 lei-daemon could not start, exited with \$?=$?
56 # try connecting again anyways, unlink+bind may be racy
57 connect($sock, $addr) or die <<"";
58 connect($path): $! (after attempted daemon start)
59 Falling back to (slow) one-shot mode
63 $pwd = $ENV{PWD} // '';
64 my $cwd = Cwd::fastcwd() // die "fastcwd(PWD=$pwd): $!";
65 if ($pwd ne $cwd) { # prefer ENV{PWD} if it's a symlink to real cwd
66 my @st_cwd = stat($cwd) or die "stat(cwd=$cwd): $!";
67 my @st_pwd = stat($pwd); # PWD invalid, use cwd
68 # make sure st_dev/st_ino match for {PWD} to be valid
69 $pwd = $cwd if (!@st_pwd || $st_pwd[1] != $st_cwd[1] ||
70 $st_pwd[0] != $st_cwd[0]);
75 }) { # (Socket::MsgHdr|Inline::C), $sock, $pwd are all available:
76 local $ENV{PWD} = $pwd;
77 my $buf = join("\0", scalar(@ARGV), @ARGV);
78 while (my ($k, $v) = each %ENV) { $buf .= "\0$k=$v" }
81 $| = 1; # unbuffer selected $sock
82 $send_cmd->($sock, [ 0, 1, 2 ], $buf, 0);
83 while (my (@fds) = $recv_cmd->($sock, $buf, 4096 * 33)) {
84 if ($buf =~ /\Aexit=([0-9]+)\n\z/) {
86 } elsif ($buf =~ /\Aexec (.+)\n\z/) {
87 exec_cmd(\@fds, split(/\0/, $1));
92 } else { # for systems lacking Socket::MsgHdr or Inline::C
94 require PublicInbox::LEI;
95 PublicInbox::LEI::oneshot(__PACKAGE__);