16 commits

Author	SHA1	Message	Date
Eelco Dolstra	0130ef88ea	* Daemon mode (`nix-worker --daemon'). Clients connect to the server ... via the Unix domain socket in /nix/var/nix/daemon.socket. The server forks a worker process per connection. * readString(): use the heap, not the stack. * Some protocol fixes.	2006-12-04 17:17:13 +00:00
Eelco Dolstra	f4279bcde0	* Don't run setuid root when build-users is empty. ... * Send startup errors to the client.	2006-12-03 16:25:19 +00:00
Eelco Dolstra	a9f9241054	* Handle a subtle race condition: the client closing the socket ... between the last worker read/write and the enabling of the signal handler.	2006-12-03 03:16:27 +00:00
Eelco Dolstra	3ed9e4ad9b	* Some hardcore magic to handle asynchronous client disconnects. ... The problem is that when we kill the client while the worker is building, and the builder is not writing anything to stderr, then the worker never notice that the socket is closed on the other side, so it just continues indefinitely. The solution is to catch SIGIO, which is sent when the far side of the socket closes, and simulate an normal interruption. Of course, SIGIO is also sent every time the client sends data over the socket, so we only enable the signal handler when we're not expecting any data...	2006-12-03 03:03:36 +00:00
Eelco Dolstra	7951c3c546	* Some hackery to propagate the worker's stderr and exceptions to the ... client.	2006-12-03 02:08:13 +00:00
Eelco Dolstra	714fa24cfb	* Run the worker in a separate session to prevent terminal signals ... from interfering.	2006-12-03 00:52:27 +00:00
Eelco Dolstra	e25fad691a	* Move addTempRoot() to the store API, and add another function ... syncWithGC() to allow clients to register GC roots without needing write access to the global roots directory or the GC lock.	2006-12-02 16:41:36 +00:00
Eelco Dolstra	8ba5d32769	* Remove queryPathHash(). ... * Help for nix-worker.	2006-12-02 14:27:24 +00:00
Eelco Dolstra	a824d58b56	* Merge addToStore and addToStoreFixed. ... * addToStore now adds unconditionally, it doesn't use readOnlyMode. Read-only operation is up to the caller (who can call computeStorePathForPath).	2006-12-01 20:51:18 +00:00
Eelco Dolstra	ceb982a1be	* Right name.	2006-12-01 18:02:05 +00:00
Eelco Dolstra	b0d8e05be1	* More operations. ... * addToStore() and friends: don't do a round-trip to the worker if we're only interested in the path (i.e., in read-only mode).	2006-12-01 18:00:01 +00:00
Eelco Dolstra	0565b5f2b3	* More remote operations. ... * Added new operation hasSubstitutes(), which is more efficient than querySubstitutes().size() > 0.	2006-11-30 22:43:55 +00:00
Eelco Dolstra	0263279071	* More operations.	2006-11-30 20:45:20 +00:00
Eelco Dolstra	a711689368	* First remote operation: isValidPath().	2006-11-30 20:13:59 +00:00
Eelco Dolstra	765bdfe542	* When NIX_REMOTE is set to "slave", fork off nix-worker in slave ... mode. Presumably nix-worker would be setuid to the Nix store user. The worker performs all operations on the Nix store and database, so the caller can be completely unprivileged. This is already much more secure than the old setuid scheme, since the worker doesn't need to do Nix expression evaluation and so on. Most importantly, this means that it doesn't need to access any user files, with all resulting security risks; it only performs pure store operations. Once this works, it is easy to move to a daemon model that forks off a worker for connections established through a Unix domain socket. That would be even more secure.	2006-11-30 19:54:43 +00:00
Eelco Dolstra	40b3f64b55	* Skeleton of the privileged worker program. ... * Some refactoring: put the NAR archive integer/string serialisation code in a separate file so it can be reused by the worker protocol implementation.	2006-11-30 19:19:59 +00:00