3 # A git daemon with an added userv security boundary.
5 # This was written by Tony Finch <dot@dotat.at>
6 # You may do anything with it, at your own risk.
7 # http://creativecommons.org/publicdomain/zero/1.0/
18 return ('[?.?.?.?]:?') unless defined $sockaddr;
19 my ($port,$addr) = sockaddr_in
$sockaddr;
20 $addr = inet_ntoa
$addr;
21 return ("[$addr]:$port",$addr,$port);
23 our ($client,$client_addr,$client_port) = ::ntoa
(getpeername(STDIN
));
24 our ($server,$server_addr,$server_port) = ::ntoa
(getsockname(STDIN
));
25 our ($service,$path,$host,$uri,$user);
27 openlog
'userv-git-daemon', 'pid', 'daemon';
28 sub fail
{ syslog
'err', "$client @_"; exit }
33 local $SIG{ALRM
} = sub { fail
"timeout" };
35 while ($length > length $buffer) {
36 my $ret = sysread STDIN
, $buffer, $length, length $buffer;
37 fail
"short read: expected $length bytes, got " . length $buffer
38 if defined $ret and $ret == 0;
39 fail
"read: $!" if not defined $ret and $! != EINTR
and $! != EAGAIN
;
45 my $len_hex = xread
4;
46 fail
"non-hex packet length" unless $len_hex =~ m{^[0-9a-fA-F]{4}$};
47 my $line = xread
hex $len_hex;
48 if ($line !~ m{^(git-[a-z-]+) /*([!-~]+)\0host=([!-~]+)\0$}) {
49 $line =~ s
|[^ -~]+| |g
;
50 fail
"could not parse \"$line\""
52 ($service,$path,$host) = ($1,$2,$3);
53 $_ = $uri = "git://$host/$path";
54 for my $cf (@ARGV) { do $cf }
56 fail
"no user configured for $uri" unless defined $user;
57 syslog
'info', "$client $service $uri";
59 my @opts = map "-D$_=${$main::{$_}}",
60 grep defined ${$main::{$_}} && /^[a-z]+$/,
63 my @cmd = ('userv', @opts, $user, $service);
64 no warnings
; # suppress errors to stderr
65 exec @cmd or fail
"exec @cmd: $!";