spamcheck/spamc: use localized slurp to read from spamc

The <EXPR> perlop, `readline', and `read' functions will all
retry on EINTR, so there's no need to retry and loop ourselves
with `sysread'.

1 files changed, 1 insertions, 9 deletions

diff --git a/lib/PublicInbox/Spamcheck/Spamc.pm b/lib/PublicInbox/Spamcheck/Spamc.pm
index b6098669..3ba2c3c9 100644
--- a/lib/PublicInbox/Spamcheck/Spamc.pm
+++ b/lib/PublicInbox/Spamcheck/Spamc.pm
@@ -23,19 +23,11 @@ sub spamcheck {
 
         my $rdr = { 0 => _msg_to_fh($self, $msg) };
         my ($fh, $pid) = popen_rd($self->{checkcmd}, undef, $rdr);
-        my $r;
         unless (ref $out) {
                 my $buf = '';
                 $out = \$buf;
         }
-again:
-        do {
-                $r = sysread($fh, $$out, 65536, length($$out));
-        } while (defined($r) && $r != 0);
-        unless (defined $r) {
-                goto again if $!{EINTR};
-                die "read failed: $!";
-        }
+        $$out = do { local $/; <$fh> };
         close $fh or die "close failed: $!";
         waitpid($pid, 0);
         ($? || $$out eq '') ? 0 : 1;