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diff --git a/Documentation/git-daemon.txt b/Documentation/git-daemon.txt new file mode 100644 index 000000000000..fdc28c041c72 --- /dev/null +++ b/Documentation/git-daemon.txt @@ -0,0 +1,340 @@ +git-daemon(1) +============= + +NAME +---- +git-daemon - A really simple server for Git repositories + +SYNOPSIS +-------- +[verse] +'git daemon' [--verbose] [--syslog] [--export-all] + [--timeout=<n>] [--init-timeout=<n>] [--max-connections=<n>] + [--strict-paths] [--base-path=<path>] [--base-path-relaxed] + [--user-path | --user-path=<path>] + [--interpolated-path=<pathtemplate>] + [--reuseaddr] [--detach] [--pid-file=<file>] + [--enable=<service>] [--disable=<service>] + [--allow-override=<service>] [--forbid-override=<service>] + [--access-hook=<path>] [--[no-]informative-errors] + [--inetd | + [--listen=<host_or_ipaddr>] [--port=<n>] + [--user=<user> [--group=<group>]]] + [--log-destination=(stderr|syslog|none)] + [<directory>...] + +DESCRIPTION +----------- +A really simple TCP Git daemon that normally listens on port "DEFAULT_GIT_PORT" +aka 9418. It waits for a connection asking for a service, and will serve +that service if it is enabled. + +It verifies that the directory has the magic file "git-daemon-export-ok", and +it will refuse to export any Git directory that hasn't explicitly been marked +for export this way (unless the `--export-all` parameter is specified). If you +pass some directory paths as 'git daemon' arguments, you can further restrict +the offers to a whitelist comprising of those. + +By default, only `upload-pack` service is enabled, which serves +'git fetch-pack' and 'git ls-remote' clients, which are invoked +from 'git fetch', 'git pull', and 'git clone'. + +This is ideally suited for read-only updates, i.e., pulling from +Git repositories. + +An `upload-archive` also exists to serve 'git archive'. + +OPTIONS +------- +--strict-paths:: + Match paths exactly (i.e. don't allow "/foo/repo" when the real path is + "/foo/repo.git" or "/foo/repo/.git") and don't do user-relative paths. + 'git daemon' will refuse to start when this option is enabled and no + whitelist is specified. + +--base-path=<path>:: + Remap all the path requests as relative to the given path. + This is sort of "Git root" - if you run 'git daemon' with + '--base-path=/srv/git' on example.com, then if you later try to pull + 'git://example.com/hello.git', 'git daemon' will interpret the path + as `/srv/git/hello.git`. + +--base-path-relaxed:: + If --base-path is enabled and repo lookup fails, with this option + 'git daemon' will attempt to lookup without prefixing the base path. + This is useful for switching to --base-path usage, while still + allowing the old paths. + +--interpolated-path=<pathtemplate>:: + To support virtual hosting, an interpolated path template can be + used to dynamically construct alternate paths. The template + supports %H for the target hostname as supplied by the client but + converted to all lowercase, %CH for the canonical hostname, + %IP for the server's IP address, %P for the port number, + and %D for the absolute path of the named repository. + After interpolation, the path is validated against the directory + whitelist. + +--export-all:: + Allow pulling from all directories that look like Git repositories + (have the 'objects' and 'refs' subdirectories), even if they + do not have the 'git-daemon-export-ok' file. + +--inetd:: + Have the server run as an inetd service. Implies --syslog (may be + overridden with `--log-destination=`). + Incompatible with --detach, --port, --listen, --user and --group + options. + +--listen=<host_or_ipaddr>:: + Listen on a specific IP address or hostname. IP addresses can + be either an IPv4 address or an IPv6 address if supported. If IPv6 + is not supported, then --listen=hostname is also not supported and + --listen must be given an IPv4 address. + Can be given more than once. + Incompatible with `--inetd` option. + +--port=<n>:: + Listen on an alternative port. Incompatible with `--inetd` option. + +--init-timeout=<n>:: + Timeout (in seconds) between the moment the connection is established + and the client request is received (typically a rather low value, since + that should be basically immediate). + +--timeout=<n>:: + Timeout (in seconds) for specific client sub-requests. This includes + the time it takes for the server to process the sub-request and the + time spent waiting for the next client's request. + +--max-connections=<n>:: + Maximum number of concurrent clients, defaults to 32. Set it to + zero for no limit. + +--syslog:: + Short for `--log-destination=syslog`. + +--log-destination=<destination>:: + Send log messages to the specified destination. + Note that this option does not imply --verbose, + thus by default only error conditions will be logged. + The <destination> must be one of: ++ +-- +stderr:: + Write to standard error. + Note that if `--detach` is specified, + the process disconnects from the real standard error, + making this destination effectively equivalent to `none`. +syslog:: + Write to syslog, using the `git-daemon` identifier. +none:: + Disable all logging. +-- ++ +The default destination is `syslog` if `--inetd` or `--detach` is specified, +otherwise `stderr`. + +--user-path:: +--user-path=<path>:: + Allow {tilde}user notation to be used in requests. When + specified with no parameter, requests to + git://host/{tilde}alice/foo is taken as a request to access + 'foo' repository in the home directory of user `alice`. + If `--user-path=path` is specified, the same request is + taken as a request to access `path/foo` repository in + the home directory of user `alice`. + +--verbose:: + Log details about the incoming connections and requested files. + +--reuseaddr:: + Use SO_REUSEADDR when binding the listening socket. + This allows the server to restart without waiting for + old connections to time out. + +--detach:: + Detach from the shell. Implies --syslog. + +--pid-file=<file>:: + Save the process id in 'file'. Ignored when the daemon + is run under `--inetd`. + +--user=<user>:: +--group=<group>:: + Change daemon's uid and gid before entering the service loop. + When only `--user` is given without `--group`, the + primary group ID for the user is used. The values of + the option are given to `getpwnam(3)` and `getgrnam(3)` + and numeric IDs are not supported. ++ +Giving these options is an error when used with `--inetd`; use +the facility of inet daemon to achieve the same before spawning +'git daemon' if needed. ++ +Like many programs that switch user id, the daemon does not reset +environment variables such as `$HOME` when it runs git programs, +e.g. `upload-pack` and `receive-pack`. When using this option, you +may also want to set and export `HOME` to point at the home +directory of `<user>` before starting the daemon, and make sure any +Git configuration files in that directory are readable by `<user>`. + +--enable=<service>:: +--disable=<service>:: + Enable/disable the service site-wide per default. Note + that a service disabled site-wide can still be enabled + per repository if it is marked overridable and the + repository enables the service with a configuration + item. + +--allow-override=<service>:: +--forbid-override=<service>:: + Allow/forbid overriding the site-wide default with per + repository configuration. By default, all the services + may be overridden. + +--[no-]informative-errors:: + When informative errors are turned on, git-daemon will report + more verbose errors to the client, differentiating conditions + like "no such repository" from "repository not exported". This + is more convenient for clients, but may leak information about + the existence of unexported repositories. When informative + errors are not enabled, all errors report "access denied" to the + client. The default is --no-informative-errors. + +--access-hook=<path>:: + Every time a client connects, first run an external command + specified by the <path> with service name (e.g. "upload-pack"), + path to the repository, hostname (%H), canonical hostname + (%CH), IP address (%IP), and TCP port (%P) as its command-line + arguments. The external command can decide to decline the + service by exiting with a non-zero status (or to allow it by + exiting with a zero status). It can also look at the $REMOTE_ADDR + and `$REMOTE_PORT` environment variables to learn about the + requestor when making this decision. ++ +The external command can optionally write a single line to its +standard output to be sent to the requestor as an error message when +it declines the service. + +<directory>:: + A directory to add to the whitelist of allowed directories. Unless + --strict-paths is specified this will also include subdirectories + of each named directory. + +SERVICES +-------- + +These services can be globally enabled/disabled using the +command-line options of this command. If finer-grained +control is desired (e.g. to allow 'git archive' to be run +against only in a few selected repositories the daemon serves), +the per-repository configuration file can be used to enable or +disable them. + +upload-pack:: + This serves 'git fetch-pack' and 'git ls-remote' + clients. It is enabled by default, but a repository can + disable it by setting `daemon.uploadpack` configuration + item to `false`. + +upload-archive:: + This serves 'git archive --remote'. It is disabled by + default, but a repository can enable it by setting + `daemon.uploadarch` configuration item to `true`. + +receive-pack:: + This serves 'git send-pack' clients, allowing anonymous + push. It is disabled by default, as there is _no_ + authentication in the protocol (in other words, anybody + can push anything into the repository, including removal + of refs). This is solely meant for a closed LAN setting + where everybody is friendly. This service can be + enabled by setting `daemon.receivepack` configuration item to + `true`. + +EXAMPLES +-------- +We assume the following in /etc/services:: ++ +------------ +$ grep 9418 /etc/services +git 9418/tcp # Git Version Control System +------------ + +'git daemon' as inetd server:: + To set up 'git daemon' as an inetd service that handles any + repository under the whitelisted set of directories, /pub/foo + and /pub/bar, place an entry like the following into + /etc/inetd all on one line: ++ +------------------------------------------------ + git stream tcp nowait nobody /usr/bin/git + git daemon --inetd --verbose --export-all + /pub/foo /pub/bar +------------------------------------------------ + + +'git daemon' as inetd server for virtual hosts:: + To set up 'git daemon' as an inetd service that handles + repositories for different virtual hosts, `www.example.com` + and `www.example.org`, place an entry like the following into + `/etc/inetd` all on one line: ++ +------------------------------------------------ + git stream tcp nowait nobody /usr/bin/git + git daemon --inetd --verbose --export-all + --interpolated-path=/pub/%H%D + /pub/www.example.org/software + /pub/www.example.com/software + /software +------------------------------------------------ ++ +In this example, the root-level directory `/pub` will contain +a subdirectory for each virtual host name supported. +Further, both hosts advertise repositories simply as +`git://www.example.com/software/repo.git`. For pre-1.4.0 +clients, a symlink from `/software` into the appropriate +default repository could be made as well. + + +'git daemon' as regular daemon for virtual hosts:: + To set up 'git daemon' as a regular, non-inetd service that + handles repositories for multiple virtual hosts based on + their IP addresses, start the daemon like this: ++ +------------------------------------------------ + git daemon --verbose --export-all + --interpolated-path=/pub/%IP/%D + /pub/192.168.1.200/software + /pub/10.10.220.23/software +------------------------------------------------ ++ +In this example, the root-level directory `/pub` will contain +a subdirectory for each virtual host IP address supported. +Repositories can still be accessed by hostname though, assuming +they correspond to these IP addresses. + +selectively enable/disable services per repository:: + To enable 'git archive --remote' and disable 'git fetch' against + a repository, have the following in the configuration file in the + repository (that is the file 'config' next to `HEAD`, 'refs' and + 'objects'). ++ +---------------------------------------------------------------- + [daemon] + uploadpack = false + uploadarch = true +---------------------------------------------------------------- + + +ENVIRONMENT +----------- +'git daemon' will set REMOTE_ADDR to the IP address of the client +that connected to it, if the IP address is available. REMOTE_ADDR will +be available in the environment of hooks called when +services are performed. + +GIT +--- +Part of the linkgit:git[1] suite |