Eons ago HPA taught git-daemon how to protect itself from /../
attacks, which Junio brought back into service in d79374c7b5
("daemon.c and path.enter_repo(): revamp path validation").
I did not carry this into git-http-backend as originally we relied
only upon PATH_TRANSLATED, and assumed the HTTP server had done
its access control checks to validate the resolved path was within
a directory permitting access from the remote client. This would
usually be sufficient to protect a server from requests for its
/etc/passwd file by http://host/smart/../etc/passwd sorts of URLs.
However in 917adc0360 Mark Lodato added GIT_PROJECT_ROOT as an
additional method of configuring the CGI. When this environment
variable is used the web server does not generate the final access
path and therefore may blindly pass through "/../etc/passwd"
in PATH_INFO under the assumption that "/../" might have special
meaning to the invoked CGI.
Instead of permitting these sorts of malformed path requests, we
now reject them back at the client, with an error message for the
server log. This matches git-daemon behavior.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* tr/die_errno:
Use die_errno() instead of die() when checking syscalls
Convert existing die(..., strerror(errno)) to die_errno()
die_errno(): double % in strerror() output just in case
Introduce die_errno() that appends strerror(errno) to die()
* js/daemon-log:
receive-pack: do not send error details to the client
upload-pack: squelch progress indicator if client cannot see it
daemon: send stderr of service programs to the syslog
Change calls to die(..., strerror(errno)) to use the new die_errno().
In the process, also make slight style adjustments: at least state
_something_ about the function that failed (instead of just printing
the pathname), and put paths in single quotes.
Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There are a few remaining ones, but this fixes the trivial ones. It boils
down to two main issues that sparse complains about:
- warning: Using plain integer as NULL pointer
Sparse doesn't like you using '0' instead of 'NULL'. For various good
reasons, not the least of which is just the visual confusion. A NULL
pointer is not an integer, and that whole "0 works as NULL" is a
historical accident and not very pretty.
A few of these remain: zlib is a total mess, and Z_NULL is just a 0.
I didn't touch those.
- warning: symbol 'xyz' was not declared. Should it be static?
Sparse wants to see declarations for any functions you export. A lack
of a declaration tends to mean that you should either add one, or you
should mark the function 'static' to show that it's in file scope.
A few of these remain: I only did the ones that should obviously just
be made static.
That 'wt_status_submodule_summary' one is debatable. It has a few related
flags (like 'wt_status_use_color') which _are_ declared, and are used by
builtin-commit.c. So maybe we'd like to export it at some point, but it's
not declared now, and not used outside of that file, so 'static' it is in
this patch.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If git-daemon is run with --detach or --inetd, then stderr is explicitly
redirected to /dev/null. But notice that the service programs were spawned
via execl_git_cmd(), in particular, the stderr channel is inherited from
the daemon. This means that errors that the programs wrote to stderr (for
example, via die()), went to /dev/null.
This patch arranges that the daemon does not merely exec the service
program, but forks it and monitors stderr of the child; it writes the
errors that it produces to the daemons log via logerror().
A consequence is that the daemon process remains in memory for the full
duration of the service program, but this cannot be avoided.
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Since 1.4.4.5 (49ba83fb67 "Add virtualization support to git-daemon")
git daemon enters an infinite loop and never terminates if a client
hides any extra arguments in the initial request line which is not
exactly "\0host=blah\0".
Since that change, a client must never insert additional extra
arguments, or attempt to use any argument other than "host=", as
any daemon will get stuck parsing the request line and will never
complete the request.
Since the client can't tell if the daemon is patched or not, it
is not possible to know if additional extra args might actually be
able to be safely requested.
If we ever need to extend the git daemon protocol to support a new
feature, we may have to do something like this to the exchange:
# If both support git:// v2
#
C: 000cgit://v2
S: 0010ok host user
C: 0018host git.kernel.org
C: 0027git-upload-pack /pub/linux-2.6.git
S: ...git-upload-pack header...
# If client supports git:// v2, server does not:
#
C: 000cgit://v2
S: <EOF>
C: 003bgit-upload-pack /pub/linux-2.6.git\0host=git.kernel.org\0
S: ...git-upload-pack header...
This requires the client to create two TCP connections to talk to
an older git daemon, however all daemons since the introduction of
daemon.c will safely reject the unknown "git://v2" command request,
so the client can quite easily determine the server supports an
older protocol.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
On OS X (and maybe other unices), getaddrinfo(3) returns NULL
in the ai_canonname field if it's called with an IP address for
the hostname. We'll now use the IP address for the hostname if
ai_canonname was NULL, this also matches the behaviour on Linux.
steps to reproduce:
$ git daemon --export-all
$ git clone git://127.0.0.1/frotz
=> git daemon's fork (silently) segfaults.
Remove the pointless loop while at it. There is only one iteration
because of the break; on the last line and there are no continues.
Signed-off-by: Benjamin Kramer <benny.kra@googlemail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Certain remote commands, when asked to do something in a
particular directory that was not actually a git repository,
would say "unable to chdir or not a git archive". The
"chdir" bit is an unnecessary detail, and the term "git
archive" is much less common these days than "git repository".
So let's switch them all to:
fatal: '%s' does not appear to be a git repository
Signed-off-by: Jeff King <peff@peff.net>
Acked-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Programs that use git_config need to find the global configuration.
When runtime prefix computation is enabled, this requires that
git_extract_argv0_path() is called early in the program's main().
This commit adds the necessary calls.
Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Acked-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
LF at the end of format strings given to die() is redundant because
die already adds one on its own.
Signed-off-by: Alexander Potashev <aspotashev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add xstrdup_tolower(), a helper to get a lower case copy of a
string, and use it in two cases.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Replace a loop around an enter_repo() call, which was used to retry
a single time with a different parameter in case the first call fails,
with two calls and an if. This is shorter and cleaner.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Die if stderr couldn't be sent to /dev/null when operating in inetd
mode and report the error message from the OS.
This fixes a compiler warning about the return value of freopen()
being ignored on Ubuntu 8.10.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Remove the global variable 'directory' and pass it as a parameter of
the two functions that use it instead, (almost) restoring their
interface to how it was before 49ba83fb67.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Having fill_in_extra_table_entries() as a separate function has no
advantage -- a function with no parameters and return values might as
well be an anonymous block of code. Its name still refers to the table
of interpolate() which has been removed earlier, so it's better to
inline it at its only call site.
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This allows hooks like pre-receive to look at the client's IP
address.
Of course the IP address can't be used to get strong security;
git-daemon isn't the right thing to use if you need that. However,
basic IP address checking can be good enough in some situations.
REMOTE_ADDR is the same environment variable used to communicate the
client's address to CGI scripts.
Signed-off-by: Joey Hess <joey@kitenet.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* jc/alternate-push:
push: receiver end advertises refs from alternate repositories
push: prepare sender to receive extended ref information from the receiver
receive-pack: make it a builtin
is_directory(): a generic helper function
A simple "grep -e stat --and -e S_ISDIR" revealed there are many
open-coded implementations of this function.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This function is outside POSIX (Linux and recent BSD have it). Replace it
with setvbuf() which is POSIX.
I am not sure about the value this patch passes as size argument to
setvbuf(), though. I know the call this patch makes is equivalent to
calling setlinebuf() with GNU libc, but POSIX itself leaves what happens
to the size argument quite vague, saying only "otherwise [i.e. when buf is
a null pointer], size _may_ determine the size of a buffer allocated by
the setvbuf() function." If passing size=0 causes stdio to allocate very
small buffer, and while stdio tries to line buffer the output, it might
make it to fail to buffer an entire line, causing early flushing of the
stream.
Even if that turns out to be a problem on minorority platforms, we won't
know it until the issue actually hurts them, so let's push this change out
and see what happens.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some systems (like e.g. OpenSolaris) define pid_t as long,
therefore all our sprintf that use %i/%d cause a compiler warning
beacuse of the implicit long->int cast. To make sure that
we fit the limits, we display pids as PRIuMAX and cast them explicitly
to uintmax_t.
Signed-off-by: David Soria Parra <dsp@php.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* "else" on the same line as "}" that closes corresponding "if (...) {";
* multi-line comments begin with "/*\n";
* sizeof, even it is not a function, is written as "sizeof(...)";
* no need to check x?alloc() return value -- it would have died;
* "if (...) { ... }" that covers the whole function body can be dedented
by returning from the function early with "if (!...) return;";
* SP on each side of an operator, i.e. "a > 0", not "a>0";
Also removes stale comment describing how remove_child() used to do its
thing.
Signed-off-by: Junio C Hamano <gitster@pobox.com>:
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Get rid of the fixed array of children and make max-connections
dynamic and configurable.
Fix the killing code to actually kill the newest connections from
duplicate IP-addresses.
Avoid forking if too busy already.
Signed-off-by: Stephen R. van den Berg <srb@cuci.nl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Move almost all code out of the child_handler() into check_dead_children().
The fact that systemcalls get interrupted by signals allows us to
make the SIGCHLD signal handler almost a no-op by simply running
check_dead_children() right before waiting on poll().
In case some systems do not interrupt systemcalls upon signal receipt,
all zombies will eventually be collected before the next poll() cycle.
Signed-off-by: Stephen R. van den Berg <srb@cuci.nl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Make git-daemon use LOG_PID like most daemons, instead of prepending the
pid to the message ourselves, when using syslog(3).
Simplify the logging code by setting stderr to line buffered, instead of
building a single string and writing it out with a single write(2).
Give an extra log message at the daemon start-up.
Signed-off-by: Stephen R. van den Berg <srb@cuci.nl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Use logerror(), not error(), so that the messages won't be lost,
especially when running the daemon with its log sent to the syslog
facility.
Signed-off-by: Stephen R. van den Berg <srb@cuci.nl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Fixes the bug on (amongst others) Solaris that only the first
child ever is reaped.
Signed-off-by: Stephen R. van den Berg <srb@cuci.nl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
To avoid waking up unnecessarily, a pipe is set up that is only ever
written to by child_handler(), when a child disconnects, as suggested
per Junio.
This avoids waking up the main process every second to see if a child
was disconnected.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When you misuse a git command, you are shown the usage string.
But this is currently shown in the dashed form. So if you just
copy what you see, it will not work, when the dashed form
is no longer supported.
This patch makes git commands show the dash-less version.
For shell scripts that do not specify OPTIONS_SPEC, git-sh-setup.sh
generates a dash-less usage string now.
Signed-off-by: Stephan Beyer <s-beyer@gmx.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signal handlers should never call syslog(), as that can raise signals
of its own.
Instead, call the syslog() from the master process.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
git_config() only had a function parameter, but no callback data
parameter. This assumes that all callback functions only modify
global variables.
With this patch, every callback gets a void * parameter, and it is hoped
that this will help the libification effort.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Any request to the daemon would fail if base-path (if specified) is not
a directory. We now check for this condition early.
Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There were a number of die() calls before the syslog was opened; hence,
these error messages would have been sent to /dev/null in detached mode.
Now we install the daemon-specific die routine before any error message is
generated so that these messages go to the syslog.
Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The port number in struct sockaddr_in needs to be converted from network
byte order to host byte order (on some architectures).
Signed-off-by: Gerrit Pape <pape@smarden.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
I found I needed NI_MAXSERV as it is defined in netdb.h, which is
not included by daemon.c. Rather than including the whole header
we can define a reasonable fallback value.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
I switched git.kernel.dk to --base-path a few minutes ago, to get rid of
a /data/git postfix in the posted urls. But transitioning is tricky,
since now all old paths will fail miserably.
So I added this --base-path-relaxed option, that will make git-daemon
try the absolute path without prefixing --base-path before giving up.
With this in place and --base-path-relaxed added, both my new url of
git://git.kernel.dk/linux-2.6-block.git
and the old
git://git.kernel.dk/data/git/linux-2.6-block.git
work fine.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This uses "git-apply --whitespace=strip" to fix whitespace errors that have
crept in to our source files over time. There are a few files that need
to have trailing whitespaces (most notably, test vectors). The results
still passes the test, and build result in Documentation/ area is unchanged.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Note: since the consequence of failure is to call die,
I don't bother to close "f".
Signed-off-by: Jim Meyering <jim@meyering.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Previous step converted use of strncmp() with literal string
mechanically even when the result is only used as a boolean:
if (!strncmp("foo", arg, 3)) ==> if (!(-prefixcmp(arg, "foo")))
This step manually cleans them up to read:
if (!prefixcmp(arg, "foo"))
Signed-off-by: Junio C Hamano <junkio@cox.net>
This mechanically converts strncmp() to use prefixcmp(), but only when
the parameters match specific patterns, so that they can be verified
easily. Leftover from this will be fixed in a separate step, including
idiotic conversions like
if (!strncmp("foo", arg, 3))
=>
if (!(-prefixcmp(arg, "foo")))
This was done by using this script in px.perl
#!/usr/bin/perl -i.bak -p
if (/strncmp\(([^,]+), "([^\\"]*)", (\d+)\)/ && (length($2) == $3)) {
s|strncmp\(([^,]+), "([^\\"]*)", (\d+)\)|prefixcmp($1, "$2")|;
}
if (/strncmp\("([^\\"]*)", ([^,]+), (\d+)\)/ && (length($1) == $3)) {
s|strncmp\("([^\\"]*)", ([^,]+), (\d+)\)|(-prefixcmp($2, "$1"))|;
}
and running:
$ git grep -l strncmp -- '*.c' | xargs perl px.perl
Signed-off-by: Junio C Hamano <junkio@cox.net>
This makes it possible to restart git-daemon even if some children are
still running.
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This allows pushing over the git:// protocol, and while it's not
authenticated, it could make sense from within a firewalled
setup where nobody but trusted internal people can reach the git
port. git-daemon is possibly easier and faster to set up in the
kind of situation where you set up git instead of CVS inside a
company.
"git-receive-pack" is disabled by default, so you need to enable it
explicitly by starting git-daemon with the "--enable=receive-pack"
command line argument, or by having your config enable it automatically.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
We have a number of badly checked write() calls. Often we are
expecting write() to write exactly the size we requested or fail,
this fails to handle interrupts or short writes. Switch to using
the new write_in_full(). Otherwise we at a minimum need to check
for EINTR and EAGAIN, where this is appropriate use xwrite().
Note, the changes to config handling are much larger and handled
in the next patch in the sequence.
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This is a mechanical clean-up of the way *.c files include
system header files.
(1) sources under compat/, platform sha-1 implementations, and
xdelta code are exempt from the following rules;
(2) the first #include must be "git-compat-util.h" or one of
our own header file that includes it first (e.g. config.h,
builtin.h, pkt-line.h);
(3) system headers that are included in "git-compat-util.h"
need not be included in individual C source files.
(4) "git-compat-util.h" does not have to include subsystem
specific header files (e.g. expat.h).
Signed-off-by: Junio C Hamano <junkio@cox.net>
In the older times, the clients did not say which host they were trying
to connect, and the code we recently added did not quite handle the
older clients correctly.
Noticed by Simon Arlott.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Clarified that parse_extra_args()s results in interpolation
table entries. Removed a few trailing whitespace occurrences.
Signed-off-by: Jon Loeliger <jdl@jdl.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Standardized on lowercase hostnames from client.
Added interpolation values for the IP address, port and
canonical hostname of the server as it is contacted and
named by the client and passed in via the extended args.
Added --listen=host_or_ipaddr option suport. Renamed port
variable as "listen_port" correspondingly as well.
Documented mutual exclusivity of --inetd option with
--user, --group, --listen and --port options.
Added compat/inet_pton.c from Paul Vixie as needed.
Small memory leaks need to be cleaned up still.
Signed-off-by: Jon Loeliger <jdl@jdl.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This command implements the git archive protocol on the server
side. This command is not intended to be used by the end user.
Underlying git-archive command line options are sent over the
protocol from "git-archive --remote=...", just like upload-tar
currently does with "git-tar-tree=...".
As for "git-archive" command implementation, this new command
does not execute any existing "git-{tar,zip}-tree" but rely
on the archive API defined by "git-archive" patch. Hence we
get 2 good points:
- "git-archive" and "git-upload-archive" share all option
parsing code.
- All kind of git-upload-{tar,zip} can be deprecated.
Signed-off-by: Franck Bui-Huu <vagabon.xyz@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This reverts parts of commit 74c0cc2 and part of commit 355f541.
Franck and Rene are working on a unified upload-archive which
would supersede this when done, so better not to get in their
way.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This allows clients to ask for tarballs with:
git tar-tree --remote=git://server/repo refname
By default, the upload-tar service is not enabled. To enable
it server-wide, the server can be started with:
git-daemon --enable=upload-tar
This service is by default overridable per repostiory, so
alternatively, a repository can define "daemon.uploadtar = true"
to enable it.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This adds an infrastructure to selectively enable and disable
more than one services in git-daemon. Currently upload-pack
service, which serves the git-fetch-pack and git-peek-remote
clients, is the only service that is defined.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Change places that use realloc, without a proper error path, to instead use
xrealloc. Drop an erroneous error path in the daemon code that used errno
in the die message in favour of the simpler xrealloc.
Signed-off-by: Jonas Fonseca <fonseca@diku.dk>
Signed-off-by: Junio C Hamano <junkio@cox.net>
[jc: I needed to hand merge the changes to the updated codebase,
so the result needs to be checked.]
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Removed the git-daemon prefix from die() because no other call to die
does this.
Signed-off-by: Matthias Lederhofer <matled@gmx.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>
When we run git-daemon from inetd, even with the --verbose option, it
doesn't log the peer address. That logic was only in the standalone
daemon code -- move it to the execute() function instead. Tested with
both IPv6 and Legacy IP clients, in both inetd and daemon mode.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Acked-by: Jon Loeliger <jdl@jdl.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
It was reported that under one implementation of socks client
"git clone" fails with "error: waitpid failed (No child processes)",
because "git" is spawned after setting SIGCHLD to SIG_IGN.
Arguably it may be a broken setting, but we should protect
ourselves so that we can get reliable results from waitpid() for
the children we care about.
This patch resets SIGCHLD to SIG_DFL in three places:
- connect.c::git_connect() - initiators of git native
protocol transfer are covered with this.
- daemon.c::main() - obviously.
- merge-index.c::main() - obviously.
There are other programs that do fork() but do not waitpid():
http-push, imap-send. upload-pack does not either, but in the
case of that program, each of the forked halves runs exec()
another program, so this change would not have much effect
there.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Add client side sending of "\0host=%s\0" extended
arg for git native protocol, backwards compatibly.
Signed-off-by: Jon Loeliger <jdl@jdl.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
The set_reuse_addr() error case was the only error case in
socklist() where we returned rather than continued. Not sure
why. Either we must free the socklist, or continue. This patch
continues on error.
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Earlier, we made --base-path to automatically forbid
user-relative paths, which was probably a mistake. This
introduces --user-path (or --user-path=path) option to control
the use of user-relative paths independently. The latter form
of the option can be used to restrict accesses to a part of each
user's home directory, similar to "public_html" some webservers
supports.
If we're invoked with --user-path=FOO option, then a URL of the
form git://~USER/PATH/... resolves to the path HOME/FOO/PATH/...,
where HOME is USER's home directory.
[jc: This is much reworked by me so bugs are mine, but the
original patch was done by Mark Wooding.]
Signed-off-by: Junio C Hamano <junkio@cox.net>
Without this, you can silently lose the ability to receive IPv4
connections if you stop and restart the daemon.
[jc: tweaked code organization a bit and made this controllable
from a command line option.]
Signed-off-by: Mark Wooding <mdw@distorted.org.uk>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Using base-path to relocate the server public space does not
have anything to do with allowing or forbidding user relative
paths.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Could cause a crash if --base-path set. Unlikely to be a security the
concern: message doesn't go to the client, so we can't leak anything
(except by dumping core), and we've already forked, so it's not a denial
of service.
Signed-off-by: Mark Wooding <mdw@distorted.org.uk>
Signed-off-by: Junio C Hamano <junkio@cox.net>
The git suite may not be in PATH (and thus programs such as
git-send-pack could not exec git-rev-list). Thus there is a need for
logic that will locate these programs. Modifying PATH is not
desirable as it result in behavior differing from the user's
intentions, as we may end up prepending "/usr/bin" to PATH.
- git C programs will use exec*_git_cmd() APIs to exec sub-commands.
- exec*_git_cmd() will execute a git program by searching for it in
the following directories:
1. --exec-path (as used by "git")
2. The GIT_EXEC_PATH environment variable.
3. $(gitexecdir) as set in Makefile (default value $(bindir)).
- git wrapper will modify PATH as before to enable shell scripts to
invoke "git-foo" commands.
Ideally, shell scripts should use the git wrapper to become independent
of PATH, and then modifying PATH will not be necessary.
[jc: with minor updates after a brief review.]
Signed-off-by: Michal Ostrowski <mostrows@watson.ibm.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Tommi Virtanen expressed a wish on #git to be able to use short and elegant
git URLs by making git-daemon 'root' in a given directory. This patch
implements this, causing git-daemon to interpret all paths relative to
the given base path if any is given.
Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>
The whitelist of git-daemon is checked against return value from
enter_repo(), and enter_repo() used to return the value obtained
from getcwd() to avoid directory aliasing issues as discussed
earier (mid October 2005).
Unfortunately, it did not go well as we hoped.
For example, /pub on a kernel.org public machine is a symlink to
its real mountpoint, and it is understandable that the
administrator does not want to adjust the whitelist every time
/pub needs to point at a different partition for storage
allcation or whatever reasons. Being able to keep using
/pub/scm as the whitelist is a desirable property.
So this version of enter_repo() reports what it used to chdir()
and validate, but does not use getcwd() to canonicalize the
directory name. When it sees a user relative path ~user/path,
it internally resolves it to try chdir() there, but it still
reports ~user/path (possibly after appending .git if allowed to
do so, in which case it would report ~user/path.git).
What this means is that if a whitelist wants to allow a user
relative path, it needs to say "~" (for all users) or list user
home directories like "~alice" "~bob". And no, you cannot say
/home if the advertised way to access user home directories are
~alice,~bob, etc. The whole point of this is to avoid
unnecessary aliasing issues.
Anyway, because of this, daemon needs to do a bit more work to
guard itself. Namely, it needs to make sure that the accessor
does not try to exploit its leading path match rule by inserting
/../ in the middle or hanging /.. at the end. I resurrected the
belts and suspender paranoia code HPA did for this purpose.
This check cannot be done in the enter_repo() unconditionally,
because there are valid callers of enter_repo() that want to
honor /../; authorized users coming over ssh to run send-pack
and fetch-pack should be allowed to do so.
Signed-off-by: Junio C Hamano <junkio@cox.net>
git-daemon was not listening when compiled with -DNO_IPV6.
socksetup() was not returning socket count when compiled with -DNO_IPV6.
Signed-off-by: Paul Serice <paul@serice.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Dropped a fair amount of reundant code in favour of the library code
in path.c
Added option --strict-paths with documentation, with backwards
compatibility for whitelist entries with symlinks.
Everything that worked earlier still works insofar as I have
remembered testing it.
Signed-off-by: Andreas Ericsson <ae@op5.se>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Allow --init-timeout and --timeout to be specified without falling
through to usage().
Make sure openlog() is called even if implied by --inetd, or messages
will be sent to wherever LOG_USER ends up.
Signed-off-by: Andreas Ericsson <ae@op5.se>
Signed-off-by: Junio C Hamano <junkio@cox.net>
I can confirm that the following patch lets the current origin
compile on OpenBSD. If you could apply this until you sort out the
rest of the namespace issue, I would be happy. Thanks.
Signed-off-by: Junio C Hamano <junkio@cox.net>
With the '0' timeout given to poll, it returns instantly without any
events on my system, causing git-daemon to consume all the CPU time. Use
-1 as the timeout so poll() only returns in case of EINTR or actually
events being available.
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
It turns out that not only did git-daemon do DWIM, but git-upload-pack
does as well. This is bad; security checks have to be performed *after*
canonicalization, not before.
Additionally, the current git-daemon can be trivially DoSed by spewing
SYNs at the target port.
This patch adds a --strict option to git-upload-pack to disable all
DWIM, a --timeout option to git-daemon and git-upload-pack, and an
--init-timeout option to git-daemon (which is typically set to a much
lower value, since the initial request should come immediately from the
client.)
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This patch adds some extra paranoia to the git-daemon filename test. In
particular, it now rejects pathnames containing //; it also adds a
redundant test for pathname absoluteness (belts and suspenders.)
A single / at the end of the path is still permitted, however, and the
.git and /.git append DWIM stuff is now handled in an integrated manner,
which means the resulting path will always be subjected to pathname checks.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This makes it possible to have a "sparse" git object subdirectory
structure, something that has become much more attractive now that people
use pack-files all the time.
As a result of pack-files, a git object directory doesn't necessarily have
any individual objects lying around, and in that case it's just wasting
space to keep the empty first-level object directories around: on many
filesystems the 256 empty directories will be aboue 1MB of diskspace.
Even more importantly, after you re-pack a project that _used_ to be
unpacked, you could be left with huge directories that no longer contain
anything, but that waste space and take time to look through.
With this change, "git prune-packed" can just do an rmdir() on the
directories, and they'll get removed if empty, and re-created on demand.
This patch also tries to fix up "write_sha1_from_fd()" to use the new
common infrastructure for creating the object files, closing a hole where
we might otherwise leave half-written objects in the object database.
[jc: I unoptimized the part that really removes the fan-out directories
to ease transition. init-db still wastes 1MB of diskspace to hold 256
empty fan-outs, and prune-packed rmdir()'s the grown but empty directories,
but runs mkdir() immediately after that -- reducing the saving from 150KB
to 146KB. These parts will be re-introduced when everybody has the
on-demand capability.]
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Make logerror() and loginfo() static
logerror() and loginfo() in daemon.c are never declared and never called
from other files, therefore they should be declared static. Found by
sparse.
Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
The syslog code logs with severity LOG_INFO in the loginfo() function, so make
things less confusing.
Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Well, this makes it even more clear that we need the packet reader and
friends to use the daemon logging code. :/ Therefore, we at least indicate
in the "Disconnect" log message if the child process exitted with an error
code or not.
Idea by Linus.
Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This patch makes git-daemon --verbose log some useful things on stderr -
in particular connects, disconnects and upload requests, and in such a
way to be able to trace a particular session. Some more errors are now
also logged (even when --verbose is not passed). It is still not perfect
since messages produced by the non-daemon-specific code are obviously
not formatted properly.
[jc: With minor fix up in the log line truncation, and
use of write(2) as suggested by Linus.]
Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This should work around the compilation problem Johannes Schindelin
and others had on Mac OS/X.
Quoting Linus:
Any operating system where socklen_t is anything else than "int" is
terminally broken. The people who introduced that typedef were confused,
and I actually had to argue with them that it was fundamentally wrong:
there is no other valid type than "int" that makes sense for it.
Signed-off-by: Junio C Hamano <junkio@cox.net>
git-daemon using inetd. does not work properly. inetd routes stderr onto the
network line just like stdout, which was apparently not expected to be so.
As the result of this, the stream is closed by the receiver, because some
"Packing %d objects\n" originating from pack_objects is first reported over
the line instead of the expected pack_header, and so the SIGNATURE test
fails. Here is a workaround.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Every time after servicing the connection, select() first fails
with EINTR and ends up waiting for one second before serving the
next client. The sleep() was placed by the original author per
suggestion from the list to avoid spinning on failing select,
but at least this EINTR situation should not result in "at most
one client per second" service limit.
I am not sure if this is the right fix, but WTH. The king
penguin says that serious people would run the daemon under
inetd anyway, and I agree with that.
Signed-off-by: Junio C Hamano <junkio@cox.net>
A few sparse warnings have crept in again since I checked last time:
undeclared variables with global scope.
Fix them by marking the private variables properly "static".
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Shut down connections that haven't even identified themselves as git
clients first. That should get rid of people who just connect to the
port and wait for something to happen.
This is using a lockless approach that allows us to handle children
dying without having to block SIGCHLD.
Right now our "solution" to too many kids is pretty damn rough, but it
at least shows what you can do.
Alexey Nezhdanov sent a patch that made git-daemon usable from inetd (ie
where inetd has already done the accept on the new connection, the fork,
and the setup of stdin/stdout). I wanted to organize the thing slightly
differently, though.
