add support for protecting references against 'got send -f' to gotd ok op@

avoid gitwrapper printing a warning when /etc/gotd.conf does not exist gotd still requires the config file, of course, but gitwrapper must treat is as optional and remain silent if the file cannot be found.

add gitwrapper(1) ok op@, tracey@ earlier version

portable: configure: split out dependencies Rather than assume all dependencies are required for all programs, split them out. This will make packaging easier, as well as splitting the code to use subprojects. Note that due to the use of config.h semantics, in most cases the got_compat.h header file is now at the top of the .c file it is included in, so that it can handle the system header inclusion properly.

portable: rework SHA detection Simply the SHA detection by not predicating on libcrypto, but instead checking individual header files.

portable: remove sha1.h; found portably Remove sha1.h as this is found portably across systems.

rename lib/sha1.c to lib/hash.c It will soon grow functions to deal with sha256 too. stsp@ agrees.

include sha2.h too where sha1.h is included In preparation for wide sha256 support; stsp@ agrees. Change done mechanically with find . -iname \*.[cy] -exec sam {} + X ,x/<sha1\.h>/i/\n#include <sha2.h>

fix gotd segfault in libevent while disconnecting clients Sending a DISCONNECT message to the repo process and then killing it and freeing its structure won't work. The message ends up on internal libevent queues and will soon crash because we have freed the memory for the event structre. Sending that message is a leftover from the times when the repo procs were persistent.

fix gotd and gotsh usage() function declaration "function declaration isn't a prototype" should fix the error seen by tracey@ on sparc64

make gotd parent dispatch handlers more robust during teardown We have observed gotd exiting after "cannot find client for fd N" errors. If this occurs then we are likely in the process of disconnecting a client session while processing an event from a child process. Treat the above error as non-fatal and stop processing more events from the child process.

remove \n from log message

make gotd store own PID after daemon(3), and avoid calling daemon(3) needlessly ok op, jamsek

gotd: disconnect on client EOF too Otherwise gotd keeps the (client-closed) sockets around and may prevent new connections from being established since they still count for the limits. ok jamsek, stsp

document the gotd -n option

gotd: move socket path check to parse.y and error from the main process It's handy to have a "bad unix socket path" error being reported directly from the main process since can get caught by `gotd -n'. ok jamsek stsp

gotd: move nrepos check to parse_config ok jamsek stsp

gotd: print configuration errors without -d Defer the absolute path check on argv[0] and log_init so that it becomes possible to run `gotd -n' to check the configuration file and get errors without specifying -d. Erorrs in the configuration now are actually always printed regardless of -d. While here also tweak an error message and print 'configuration OK' if -n ok stsp@

use just one pointer variable to keep track of a client's repo process ok op@

update client state tracking in the gotd parent process The session process takes over the old state definitions under a new name ("session state"). The parent only needs to keep track of whether a client has been granted access, so it only uses two states: NEW, and ACCCESS_GRANTED which is set as soon as the auth process has granted repository access and before the session and repo_read/repo_write children are started. Because 'gotctl info' can no longer observe the session state remove support code for printing it. ok op@

remove support for showing client capabilities in 'gotctl info' The gotd parent process has lost access to client capabilities. Take the easy way out and remove related code. If needed, client capabilities can still be found in the debug log with 'gotd -v'. ok op, jamsek

remove now unused fields from struct gotd_client

add a gotd session process, split off from the parent process The new session process is able to manipulate files in the repository and keeps track of the read/write client session state. The parent process now restricts its view of the filesystem to the absolute path stored in argv[0], and combines this with unveil "x" on this path. As a result the parent process can only re-exec itself. small tweaks + ok op@

call realpath() during early startup in gotd's parse.y This ensures that all repositories exist when the process is first started. It will also help to avoid an "rpath" pledge promise in a future gotd which uses a separate session process, by avoiding realpath() calls while starting new processes.

do not treat nonexistent repositories as a fatal error in gotd