git-daemon: simplify xread()

diff --git a/git-daemon/git-daemon.pl b/git-daemon/git-daemon.pl
index df753e1f79ac67eb5aa884c489673b0346ec424f..4f8a7747cb72aa24d96023dffc8a8e65698eeb91 100755 (executable)
--- a/git-daemon/git-daemon.pl
+++ b/git-daemon/git-daemon.pl
@@ -18,7 +18,7 @@ use Socket;
 use Sys::Syslog;
 
 use vars qw{ %vhost_default_user %vhost_user_from_tilde
-            $TILDE $REPO $HOSTNAME };
+             $TILDE $REPO $HOSTNAME };
 
 use lib '/etc/userv';
 require 'git-daemon-vhosts.pl';
@@ -44,18 +44,14 @@ sub fail {
 sub xread {
     my $length = shift;
     my $buffer = "";
-    my $count = 0;
     # simply die if the client takes too long
     alarm 30;
     while ($length > length $buffer) {
-        my ($data,$ret);
-       do {
-           $ret = sysread STDIN, $data, $length
-       } while not defined $ret and ($! == EINTR or $! == EAGAIN);
-        fail "read: $!" unless defined $ret;
-        fail "short read: expected $length bytes, got $count" if $ret == 0;
-        $buffer .= $data;
-        $count += $ret;
+        my $ret = sysread STDIN, $buffer, $length, length $buffer;
+        fail "short read: expected $length bytes, got " . length $buffer
+                            if defined $ret and $ret == 0;
+        fail "read: $!" if not defined $ret and $! != EINTR and $! != EAGAIN;
+        $ret = 0        if not defined $ret;
     }
     alarm 0;
     return $buffer;