+# Copyright (C) 2020 all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+
+package PublicInbox::EOFpipe;
+use strict;
+use parent qw(PublicInbox::DS);
+use PublicInbox::Syscall qw(EPOLLIN EPOLLONESHOT);
+
+sub new {
+ my (undef, $rd, $cb, $arg) = @_;
+ my $self = bless { cb => $cb, arg => $arg }, __PACKAGE__;
+ # 1031: F_SETPIPE_SZ, 4096: page size
+ fcntl($rd, 1031, 4096) if $^O eq 'linux';
+ $self->SUPER::new($rd, EPOLLIN|EPOLLONESHOT);
+}
+
+sub event_step {
+ my ($self) = @_;
+ if ($self->do_read(my $buf, 1) == 0) { # auto-closed
+ $self->{cb}->($self->{arg});
+ }
+}
+
+1;