ryan-c on #gitolite (ryan.castellucci@gmail.com) found that if a user
types in
ssh git@server `echo -e "\033[2J"`
or eqvt, he can get raw ASCII control characters into gitolite's log
file. Then if a gitolite admin 'cat's the log file (instead of using a
pager, or uses a pager in raw mode like 'less -r'), those control
characters hit his screen and do stuff.
While clearing the screen etc is probably harmless and I would not have
bothered, we know that the old vt100 would allow the keyboard to be
remapped by the server sending control codes, and we're not really sure
which of the currently in use terminals emulate this.
And finally, I found somewhere that "PuTTY allows the server to send
control codes that let it take over the mouse". Scary...
(...of course, I hate putty/plink so I was sorely tempted to leave this
as is to punish people who use it <grin> but not really; I'd joke about
it but won't actually *do* it!)
Earlier, it wasn't as critical for gl-setup to be run with the full
path; the BINDIR deduction used to happen in almost every program. Now
it's a lot more important.
Apparently I never noticed that "/bin/bash -l gl-setup" does not set $0
to the correct, fq path. Adding a "-c" does, however...
[thanks to Jeff from the KDE team for finding this]
This shaves 3 seconds off of KDE's config compile time :-)
Yes, I know wrap_print has that extra print statement, but otherwise it
was lying around not earning its keep so I gave it a little side job :-)
you might wonder why these are different from all the other variables in
the rc file... it's just that I never thought people would want to
change these!
- allow a mob username to be defined; all unauthenticated access will
look to gitolite like this user (if you setup apache also properly)
- update doc with more details (some repeat stuff from `man
git-http-backend` but it's probably worth having everything in one
place
Fedora's config has over 11,000 repositories and the compiled config
file is over 20 MB in size. Although negligible on a server class
machine, on my laptop just parsing this file takes a good 2.5 seconds.
Even if you use GL_ALL_READ_ALL (see a couple of commits before this
one) to remove the overhead for 'read's, that's still a pretty big
overhead for writes. And GL_ALL_READ_ALL is not really a solution for
most people anyway.
With this commit, using GL_BIG_CONFIG adds another optimisation; see
doc/big-config.mkd for details (look for the word "split config" to find
the section that talks about it).
----
Implementation notes:
- the check for GL_NO_CREATE_REPOS has moved *into* the loop (which it
completely bypassed earlier) so that write_1_compiled_conf can be
called on each item
Fedora (for example) runs like this:
* each user has his own userid and login
* his/her ~/.ssh/authkeys file (containing only his/her key) has a
"command=" clause invoking just "gl-auth-command"
* trusted users have "gl-auth-command -s" meaning they can get a shell if
they want to
As a result, there is no specific $HOME where you can look for
.gitolite.rc. Hence this patch
----
Side note: in addition, Fedora may have one or more of the following
characteristics (writing them here for convenience; they're not directly
relevant to this patch):
* actual git repos are under "git" (or some such), and include the chmod g+s
(git init --shared) unix perms tricks for shared access
* but since they're coming through gl-auth, branch-level acls are in effect
* the gitolite config file is generated from some database and compiled (all
via cron)
* they keydir/ is empty; in fact they probably don't use the admin repo at
all, AFAIK
For sample code see new file contrib/adc/get-rights-and-owner.in-perl.
Despite the name, you can use similar code in a hook also -- comments in
that file will tell you how.
implementation notes:
- check_access now takes an optional last arg "dry_run", which is also
passes through to check_ref
- check_ref returns a "DENIED by ..." instead of die-ing if dry_run is
passed in
- as a side effect, cli_repo_rights is now just a stub calling
check_access (we kept it hanging around for backward compat -- too
much adc pain for too many people if we change it now)
perm categories (like READERS and WRITERS, or whatever you put in your
$GL_WILDREPOS_PERM_CATS) are *supposed* to "have no pubkeys"; don't warn
about them
thanks to Joe Schaefer at the ASF for catching it. Note that this new
pattern *may* be too restrictive -- if you're using this feature and
have a problem with the new pattern please email me.
See email to gitolite mailing list around this date (2010-11-28) for
more details.
They don't work if someone calls the script for example
su - gitolite -c gl-setup <key>
from a directory where "gitolite" user does not have permissions (e.g.
0700), then 'cd $od' fails and we stay in gitolite's $HOME.
[commit message changed by committer; author was more polite ;-)]
(we quietly do not document the 'able' adc, which is now the most
"official" adc in the sense that it has a new test, t64-write-able!)
other notes: fix bug in 'able' (not setting $loc)
- openssh 5.6 doesn't like "ssh user@host" with no command following
it, because they changed the rules for pty allocation failure.
I'm calling this a BSD compat change because BSD hit it first, but
really, the "ssh -T" will eventually be needed by Linuxes also, as
they start upgrading to openssh 5.6
- FreeBSD (and I presume the other BSDs also) *require* a "-t"
argument to mktemp (thanks to matias for finding this).
Note that on FreeBSD, -t is a prefix (the X's are taken literally,
and the real random stuff gets appended to the prefix), while on
Linux, it is a template (the X's are converted to random
characters). Thus, on BSD you will get names like
/tmp/tmp.XXXXXXXXXX.1BAEGkHm, whereas on Linux you'll get
/tmp/tmp.Aq7vbdNpGp or something.
Use case: group information is generated from an external system and
because of synchronization or authorization restrictions some groups
can be empty.
Signed-off-by: Teemu Matilainen <teemu.matilainen@reaktor.fi>
THE COMPILED CONFIG FILE FORMAT CHANGES WITH THIS VERSION. PLEASE DO
NOT MIX VERSIONS OR DOWNGRADE. Upgrading using normal gitolite upgrade
means should be fine, though.
Originally, we only allowed "R" and "RW" as categories of users supplied
to the `setperms` command. These map respectively to "READERS" and
"WRITERS" in the access rules.
Now:
- we prefer READERS instead of R and WRITERS instead of RW
- we allow the admin to define other categories as she wishes
(example: MANAGERS, TESTERS, etc). These do not have abbreviations,
however, so they must be supplied in full.
PLEASE, *PLEASE*, read the section in doc/wildcard-repositories.mkd for
more info. This is a VERY powerful feature and if you're not careful
you could mess up the ACLs nicely.
Backward compat note: you can continue to use the "R" and "RW"
categories when running the "setperms" command, and gitolite will
internally convert them to READERS and WRITERS categories.
----
implementation notes:
- new RC var called GL_WILDREPOS_PERM_CATS that is a space-sep list of
the allowed categories in a gl-perms file; defaults to "R RW" if not
specified
- wild_repo_rights no longer returns $c, $r, $wC, where $r = $user if
"R $user", $r = '@all' if "R @all", and similarly with $w and "RW".
Instead it returns $c and a new hash that effectively gives the same
info, but expanded to include any other valid categories (listed in
GL_WILDREPOS_PERM_CATS)
- consequently, the arguments that parse_acl takes also change the
same way
- (side note: R and RW are quietly converted to READERS and WRITERS;
however, new categories that you define yourself do not have
abbreviations)
- setperms validates perms to make sure only allowed categories are
used; however even if someone changed them behind the scenes,
wild_repo_rights will also check. This is necessary in case the
admin tightened up GL_WILDREPOS_PERM_CATS after someone had already
setperms-d his repos.
- as a bonus, we eliminate all the post-Dumper shenanigans, at least
for READERS and WRITERS. Those two now look, to the compile script,
just like any other usernames.
This was a very old quirk/oddity. Doing
R = @all alice
would fail, but you could still do
R = @all
R = alice
Now we fixed it so it's consistent.
----
This also fixed a curious bug that no one ever caught:
@all = u1 u2 # yes -- there was no check on redefining @all
repo foo
R = @all u3 # now would not fail because of defining @all
would have given only those 3 users R access to foo, not really @all
users! This was because the previous failure message was an artifact of
not finding an expansion for @all, not a genuine "why are you saying
@all and then specifying some user explicitly" warning!
The old method of passing in usergroup info had some problems, which are
now fixed. It is also much easier to use now -- no more "wrapper"
script, plus it should work identially whether you use sshd or httpd.
See doc/big-config.mkd for details on the new method.
----
Notes on problems with the old method:
The old method for passing in usergroup info consisted of tacking them
on as extra arguments to gl-auth-command, after the username.
However, there are some problems with this method.
Some actions in gitolite look for permissions for users other than the
invoking user. Determining permissions for gitweb and daemon is one.
An admin asking for "info" on some other user, is another.
However, the list of groups sent in via the command line
pertains only to the invoking user, so these actions don't work
correctly. They may even pick up the wrong permissions.
What it all boils down to is that we need group information for any user
dynamically, instead of being passed a (static) list just for the
invoking user.
- hardcode 0700 mode for GL_ADMINDIR tree (thanks to ma at
ibitsense.com) for catching this
- honor REPO_UMASK for GL_REPO_BASE_ABS creation
- plus a minor doc update
for people who don't get the continual reference to towels when talking
about the "gl-dont-panic" program, all I can say is that your education
is incomplete ;-)
