* Re: [PATCH] lei: fix git-credential handling
2021-04-02 9:42 5% [PATCH] lei: fix git-credential handling Eric Wong
@ 2021-04-05 4:17 7% ` Kyle Meyer
0 siblings, 0 replies; 2+ results
From: Kyle Meyer @ 2021-04-05 4:17 UTC (permalink / raw)
To: Eric Wong; +Cc: meta
Eric Wong writes:
> I completely forgot about git-credential prompting when
> making lei background the client process for MUA.
>
> Now it backgrounds itself only for the MUA when no FDs are
> passed, since the MUA is the final command run. Otherwise, it
> relies on FD passing as before.
This seems to break the pager functionality. For example, if I do
lei q -I https://public-inbox.org/meta/ s:blob
I end up in a misbehaving pager (/bin/less, on my system). Navigation
keys like 'j' and 'k' are instead passed through, and enter returns to
the prompt.
^ permalink raw reply [relevance 7%]
* [PATCH] lei: fix git-credential handling
@ 2021-04-02 9:42 5% Eric Wong
2021-04-05 4:17 7% ` Kyle Meyer
0 siblings, 1 reply; 2+ results
From: Eric Wong @ 2021-04-02 9:42 UTC (permalink / raw)
To: meta
I completely forgot about git-credential prompting when
making lei background the client process for MUA.
Now it backgrounds itself only for the MUA when no FDs are
passed, since the MUA is the final command run. Otherwise, it
relies on FD passing as before.
Fixes: c790a75439f3a1db ("script/lei: background ourselves on MUA/pager exec")
---
lib/PublicInbox/LEI.pm | 8 +++++++-
script/lei | 46 ++++++++++++++++++++++++++++--------------
2 files changed, 38 insertions(+), 16 deletions(-)
diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index 69d48bd1..f9361c68 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -839,7 +839,13 @@ sub start_mua {
if (my $sock = $self->{sock}) { # lei(1) client process runs it
send($sock, exec_buf(\@cmd, {}), MSG_EOR);
} elsif ($self->{oneshot}) {
- $self->{"pid.$self.$$"}->{spawn(\@cmd)} = \@cmd;
+ my $pid = fork // die "fork: $!";
+ if ($pid > 0) { # original process
+ exec(@cmd);
+ warn "exec @cmd: $!\n";
+ POSIX::_exit(1);
+ }
+ POSIX::setsid() > 0 or die "setsid: $!";
}
if ($self->{lxs} && $self->{au_done}) { # kick wait_startq
syswrite($self->{au_done}, 'q' x ($self->{lxs}->{jobs} // 0));
diff --git a/script/lei b/script/lei
index bea8dcde..78a7dab9 100755
--- a/script/lei
+++ b/script/lei
@@ -14,31 +14,45 @@ my $send_cmd = PublicInbox::CmdIPC4->can('send_cmd4') // do {
PublicInbox::Spawn->can('send_cmd4');
};
-my @orig_pid;
+my %pids;
+my $sigchld = sub {
+ my $flags = scalar(@_) ? POSIX::WNOHANG() : 0;
+ for my $pid (keys %pids) {
+ delete($pids{$pid}) if waitpid($pid, $flags) == $pid;
+ }
+};
+my @parent;
my $exec_cmd = sub {
my ($fds, $argc, @argv) = @_;
- die "BUG: already exec-ed\n" if @orig_pid;
- @orig_pid = ($$);
- require POSIX; # WNOHANG
+ my $parent = $$;
+ require POSIX;
my @old = (*STDIN{IO}, *STDOUT{IO}, *STDERR{IO});
my @rdr;
for my $fd (@$fds) {
- open(my $tmpfh, '+<&=', $fd) or die "open +<&=$fd: $!";
- push @rdr, shift(@old), $tmpfh;
+ open(my $newfh, '+<&=', $fd) or die "open +<&=$fd: $!";
+ push @rdr, shift(@old), $newfh;
}
+ my $do_exec = sub {
+ my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
+ @ENV{keys %env} = values %env;
+ exec(@argv);
+ warn "exec: @argv: $!\n";
+ POSIX::_exit(1);
+ };
+ $SIG{CHLD} = $sigchld;
my $pid = fork // die "fork: $!";
if ($pid == 0) {
+ while (my ($io, $newfh) = splice(@rdr, 0, 2)) {
+ open $io, '+<&', $newfh or die "open +<&=: $!";
+ }
+ $do_exec->() if scalar(@$fds); # git-credential, pager
+
+ # parent backgrounds on MUA
POSIX::setsid() > 0 or die "setsid: $!";
+ @parent = ($parent);
return; # continue $recv_cmd in background
}
- my %env = map { split(/=/, $_, 2) } splice(@argv, $argc);
- while (my ($old_io, $tmpfh) = splice(@rdr, 0, 2)) {
- open $old_io, '+<&', $tmpfh or die "open +<&=: $!";
- }
- @ENV{keys %env} = values %env;
- exec(@argv);
- warn "exec: @argv: $!\n";
- POSIX::_exit(1);
+ $do_exec->() if !scalar(@$fds); # MUA reuses all FDs
};
if ($send_cmd && eval {
@@ -95,16 +109,18 @@ Falling back to (slow) one-shot mode
if ($buf =~ /\Aexec (.+)\z/) {
$exec_cmd->(\@fds, split(/\0/, $1));
} elsif ($buf eq '-WINCH') {
- kill($buf, @orig_pid); # for MUA
+ kill($buf, @parent); # for MUA
} elsif ($buf =~ /\Ax_it ([0-9]+)\z/) {
$x_it_code = $1 + 0;
last;
} elsif ($buf =~ /\Achild_error ([0-9]+)\z/) {
$x_it_code = $1 + 0;
} else {
+ $sigchld->();
die $buf;
}
}
+ $sigchld->();
if (my $sig = ($x_it_code & 127)) {
kill $sig, $$;
sleep(1) while 1;
^ permalink raw reply related [relevance 5%]
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2021-04-02 9:42 5% [PATCH] lei: fix git-credential handling Eric Wong
2021-04-05 4:17 7% ` Kyle Meyer
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