Commit Briefs

4fccd2fe0f Thomas Adam

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.


98670ba726 Thomas Adam

portable: rework SHA detection

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


4680f70435 Thomas Adam

portable: remove sha1.h; found portably

Remove sha1.h as this is found portably across systems.


588a8092bc Thomas Adam

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>


5b289346a9 Thomas Adam

open_blob: copy whole id not just the sha1


b102a16b7b Thomas Adam

got_object_open: copy whole id not just the sha1

ok stsp@


a66a4a5063 Thomas Adam

fix mistaken instances returning NULL instead of err

While here, for consistency, check dup() return value for -1 rather than < 0. ok stsp@


ebe6ec920b Thomas Adam

use a caller-specified size limit for mapped files in got_object_raw_alloc()

Without this we end up being confused about whether a raw object has been mapped into memory, leading to crashes. ok op@


4ea11ec702 Thomas Adam

fix reference counting of raw objects opened via privsep helpers

Such objects were never closed, resulting in memory and file descriptor leaks.


3efd8e3122 Thomas Adam

introduce gotd(8), a Git repository server reachable via ssh(1)

This is an initial barebones implementation which provides the absolute minimum of functionality required to serve got(1) and git(1) clients. Basic fetch/send functionality has been tested and seems to work here, but this server is not yet expected to be stable. More testing is welcome. See the man pages for setup instructions. The current design uses one reader and one writer process per repository, which will have to be extended to N readers and N writers in the future. At startup, each process will chroot(2) into its assigned repository. This works because gotd(8) can only be started as root, and will then fork+exec, chroot, and privdrop. At present the parent process runs with the following pledge(2) promises: "stdio rpath wpath cpath proc getpw sendfd recvfd fattr flock unix unveil" The parent is the only process able to modify the repository in a way that becomes visible to Git clients. The parent uses unveil(2) to restrict its view of the filesystem to /tmp and the repositories listed in the configuration file gotd.conf(5). Per-repository chroot(2) processes use "stdio rpath sendfd recvfd". The writer defers to the parent for modifying references in the repository to point at newly uploaded commits. The reader is fine without such help, because Git repositories can be read without having to create any lock-files. gotd(8) requires a dedicated user ID, which should own repositories on the filesystem, and a separate secondary group, which should not have filesystem-level repository access, and must be allowed access to the gotd(8) socket. To obtain Git repository access, users must be members of this secondary group, and must have their login shell set to gotsh(1). gotsh(1) connects to the gotd(8) socket and speaks Git-protocol towards the client on the other end of the SSH connection. gotsh(1) is not an interactive command shell. At present, authenticated clients are granted read/write access to all repositories and all references (except for the "refs/got/" and the "refs/remotes/" namespaces, which are already being protected from modification). While complicated access control mechanism are not a design goal, making it possible to safely offer anonymous Git repository access over ssh(1) is on the road map.


3e8d36947e Thomas Adam

portable: handle sys/tree.h

Unfortunately, MacOS doesn't provide sys/tree.h -- so the compat check for this must happen portably.


4e5e98e851 Thomas Adam

portable: remove sha1.h include

This is searched for portably.



b61ceafcc7 Thomas Adam

move functions which open objects into new file object_open_privsep.c

For the future, this will make it possible to provide alternative implementations of functions now stored in object_open_privsep.c. This will probably be needed by future gotd(8) which runs inside a chroot(2) environment and without the "exec" pledge(2) promise, making it impossible to run libexec helpers on the fly. Details of this design are not yet settled, but moving functions into a separate compilation unit won't hurt in any case.