.\" -----------------------------------------------------------------------
.\"
.\"   Copyright 2011 Linux Foundation; author: Konstantin Ryabitsev
.\"
.\"   This program is free software; you can redistribute it and/or
.\"   modify it under the terms of the GNU General Public License as
.\"   published by the Free Software Foundation, Inc.; either version 2
.\"   of the License, or (at your option) any later version;
.\"   incorporated herein by reference.
.\"
.\" -----------------------------------------------------------------------
.TH KUP-SERVER "1" "2011" "kernel.org upload server utility" "kernel.org"
.SH NAME
kup-server \- kernel.org upload server utility
.SH DESCRIPTION
.PP
The program
.B kup-server
is expected to be the receiver of an ssh shell, configured with the
following or similar options in ~/.ssh/authorized_keys:
.PP
.RS
command="/usr/bin/kup-server",no-agent-forwarding,no-port-forwarding,no-pty,no-user-rc,no-X11-forwarding ssh-rsa AAAA[...]
.RE
.PP
Each user should have their own UID, as Unix user permissions are used
for specific tree access control. On the client side, a corresponding
client-side utility
.BR kup
is used to initiate the connection and perform the uploads.
.SH GLOBAL CONFIG
.PP
The configuration file for 
.B kup-server
is located in /etc/kup/kup-server.cfg and has the following options:
.TP
\fB[paths]\fP
All paths in this section should be disjoint. Do not combine any of them
into one directory.
.TP
\fBdata_path\fP = \fI/var/lib/kup/pub\fP
Path for public consumption, e.g. served via http or rsync.
.TP
\fBgit_path\fP = \fI/var/cache/git\fP
This is the path where git trees (for the TAR and DIFF options) are
available.  Those should be readonly for the uploaders.
.TP
\fBlock_file\fP = \fI/run/kup/lock\fP
A common lock file for data_path.  No program should modify the
content in data_path without holding an flock on this file.  Should
be readonly for the uploaders.
.TP
\fBtmp_path\fP = \fI/var/cache/kup/tmp/\fP
tmp_path can be either:
.PP
.RS
1. a directory writable by every user and with the sticky bit set
(typically mode 1777 or 1770).  In that case, DO NOT end the path
with a slash, or:
.PP
2. A directory containing an empty directory for each user (named for
that user), owned by that user and mode 0700. In this case, DO end
the path with a slash.
.PP
In either case, this directory tree 
.B MUST
be on the same filesystem as \fBdata_path\fP, since the script expects tocreate files in this directory and rename() them into data_path.
.RE
.TP
\fBpgp_path\fP = \fI/var/lib/kup/pgp\fP
A directory containing a GnuPG public keyring for each user, named
<user>.gpg and readable (but not writable) by that user.
.PP
.TP
\fB[limits]\fP
All sizes are in bytes, all times in seconds.
.TP
\fBmax_data\fP = \fI8589934592\fP
Max size of uploaded data.
.TP
\fBbufsiz\fP = \fI262144\fP
Buffer size when reading data.
.TP
\fBtimeout_command\fP = \fI30\fP
How long to wait for a command to time out.
.TP
\fBtimeout_data\fP = \fI300\fP
Must read at least bufsiz bytes in this timespan.
.TP
\fBtimeout_compress\fP = \fI900\fP
Uncompressing tarballs must take at most this long.
.TP
\fBtimeout_compress_cpu\fP = \fI900\fP
Each compression command must take at most this long in CPU time.
.PP
.TP
\fB[compressors]\fP
This section allows specifying the compressors to use when creating
compressed versions of uploaded content.
.TP
\fBuse\fP = \fIgz, xz\fP
A comma-separated list of file extensions to create (minus the leading dot).
For each extension specified, you will need to add a matching section specifying
which command and flags to use for decompression and which for compression. Make
sure to configure the decompress command to output to stdout. E.g.:
.PP
.RS
.nf
[gz]
compress_command = /bin/pigz -9
decompress_command = /bin/gzip -cd

[xz]
compress_command = /bin/xz -9 -T0
decompress_command = /bin/xz -cd
.fi
.RE
.SH AUTHOR
Written by H. Peter Anvin <hpa@zytor.com>.
.SH COPYRIGHT
Copyright \(co 2011 Intel Corporation
.sp
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, Inc.; either version 2 of the License,
or (at your option) any later version; incorporated herein by
reference.  There is NO warranty; not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.
.SH "SEE ALSO"
.BR kup (1)