# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
use strict;
use v5.10.1;
-use Socket qw(AF_UNIX SOCK_STREAM pack_sockaddr_un);
+use Socket qw(AF_UNIX SOCK_SEQPACKET MSG_EOR pack_sockaddr_un);
+use Errno qw(EINTR ECONNRESET);
use PublicInbox::CmdIPC4;
-my $narg = 4;
+my $narg = 5;
+my ($sock, $pwd);
my $recv_cmd = PublicInbox::CmdIPC4->can('recv_cmd4');
my $send_cmd = PublicInbox::CmdIPC4->can('send_cmd4') // do {
require PublicInbox::Spawn; # takes ~50ms even if built *sigh*
- $narg = 4;
$recv_cmd = PublicInbox::Spawn->can('recv_cmd4');
PublicInbox::Spawn->can('send_cmd4');
};
+sub sigchld {
+ my ($sig) = @_;
+ my $flags = $sig ? POSIX::WNOHANG() : 0;
+ while (waitpid(-1, $flags) > 0) {}
+}
+
sub exec_cmd {
my ($fds, $argc, @argv) = @_;
- my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
- my @m = (*STDIN{IO}, '<&=', *STDOUT{IO}, '>&=',
- *STDERR{IO}, '>&=');
+ my @m = (*STDIN{IO}, '<&=', *STDOUT{IO}, '>&=', *STDERR{IO}, '>&=');
+ my @rdr;
for my $fd (@$fds) {
my ($old_io, $mode) = splice(@m, 0, 2);
- open($old_io, $mode, $fd) or die "open $mode$fd: $!";
+ open(my $tmpfh, $mode, $fd) or die "open $mode$fd: $!";
+ push @rdr, $old_io, $mode, $tmpfh;
+ }
+ require POSIX; # WNOHANG
+ $SIG{CHLD} = \&sigchld;
+ my $pid = fork // die "fork: $!";
+ if ($pid == 0) {
+ my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
+ while (my ($old_io, $mode, $tmpfh) = splice(@rdr, 0, 3)) {
+ open $old_io, $mode, $tmpfh or die "open $mode: $!";
+ }
+ %ENV = (%ENV, %env);
+ exec(@argv);
+ die "exec: @argv: $!";
}
- %ENV = (%ENV, %env);
- exec(@argv);
- die "exec: @argv: $!";
}
-my ($sock, $pwd);
if ($send_cmd && eval {
my $path = do {
my $runtime_dir = ($ENV{XDG_RUNTIME_DIR} // '') . '/lei';
require File::Path;
File::Path::mkpath($runtime_dir, 0, 0700);
}
- "$runtime_dir/$narg.sock";
+ "$runtime_dir/$narg.seq.sock";
};
my $addr = pack_sockaddr_un($path);
- socket($sock, AF_UNIX, SOCK_STREAM, 0) or die "socket: $!";
+ socket($sock, AF_UNIX, SOCK_SEQPACKET, 0) or die "socket: $!";
unless (connect($sock, $addr)) { # start the daemon if not started
local $ENV{PERL5LIB} = join(':', @INC);
open(my $daemon, '-|', $^X, qw[-MPublicInbox::LEI
Falling back to (slow) one-shot mode
}
- require Cwd;
- $pwd = $ENV{PWD} // '';
- my $cwd = Cwd::fastcwd() // die "fastcwd(PWD=$pwd): $!";
- if ($pwd ne $cwd) { # prefer ENV{PWD} if it's a symlink to real cwd
- my @st_cwd = stat($cwd) or die "stat(cwd=$cwd): $!";
- my @st_pwd = stat($pwd); # PWD invalid, use cwd
- # make sure st_dev/st_ino match for {PWD} to be valid
- $pwd = $cwd if (!@st_pwd || $st_pwd[1] != $st_cwd[1] ||
- $st_pwd[0] != $st_cwd[0]);
- } else {
- $pwd = $cwd;
- }
1;
}) { # (Socket::MsgHdr|Inline::C), $sock, $pwd are all available:
- local $ENV{PWD} = $pwd;
+ open my $dh, '<', '.' or die "open(.) $!";
my $buf = join("\0", scalar(@ARGV), @ARGV);
while (my ($k, $v) = each %ENV) { $buf .= "\0$k=$v" }
$buf .= "\0\0";
- select $sock;
- $| = 1; # unbuffer selected $sock
- $send_cmd->($sock, [ 0, 1, 2 ], $buf, 0);
- while (my (@fds) = $recv_cmd->($sock, $buf, 4096 * 33)) {
- if ($buf =~ /\Aexit=([0-9]+)\n\z/) {
- exit($1);
- } elsif ($buf =~ /\Aexec (.+)\n\z/) {
+ $send_cmd->($sock, [ 0, 1, 2, fileno($dh) ], $buf, MSG_EOR);
+ my $x_it_code = 0;
+ while (1) {
+ my (@fds) = $recv_cmd->($sock, $buf, 4096 * 33);
+ if (scalar(@fds) == 1 && !defined($fds[0])) {
+ last if $! == ECONNRESET;
+ next if $! == EINTR;
+ die "recvmsg: $!";
+ }
+ last if $buf eq '';
+ if ($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();
die $buf;
}
}
+ sigchld();
+ if (my $sig = ($x_it_code & 127)) {
+ kill $sig, $$;
+ sleep;
+ }
+ exit($x_it_code >> 8);
} else { # for systems lacking Socket::MsgHdr or Inline::C
warn $@ if $@;
require PublicInbox::LEI;