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# Copyright (C) 2021 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# for reading pipes and sockets off the DS event loop
package PublicInbox::InputPipe;
use strict;
use v5.10.1;
use parent qw(PublicInbox::DS);
use PublicInbox::Syscall qw(EPOLLIN EPOLLET);
sub consume {
my ($in, $cb, @args) = @_;
my $self = bless { cb => $cb, args => \@args }, __PACKAGE__;
eval { $self->SUPER::new($in, EPOLLIN|EPOLLET) };
return $self->requeue if $@; # regular file
$in->blocking(0); # pipe or socket
}
sub event_step {
my ($self) = @_;
my $r = sysread($self->{sock} // return, my $rbuf, 65536);
if ($r) {
$self->{cb}->(@{$self->{args} // []}, $rbuf);
return $self->requeue; # may be regular file or pipe
}
if (defined($r)) { # EOF
$self->{cb}->(@{$self->{args} // []}, '');
} elsif ($!{EAGAIN}) {
return;
} else { # another error
$self->{cb}->(@{$self->{args} // []}, undef)
}
$self->{sock}->blocking ? delete($self->{sock}) : $self->close
}
1;
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