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Author SHA1 Message Date
Eelco Dolstra
06c4929958 * Some refactoring. 
* Throw more exceptions as BuildErrors instead of Errors.  This
  matters when --keep-going is turned on.  (A BuildError is caught
  and terminates the goal in question, an Error terminates the
  program.)
 2006-12-08 17:26:21 +00:00
Eelco Dolstra
9dbfe242e3 * Kill a build if it has gone for more than a certain number of 
seconds without producing output on stdout or stderr (NIX-65).  This
  timeout can be specified using the `--max-silent-time' option or the
  `build-max-silent-time' configuration setting.  The default is
  infinity (0).

* Fix a tricky race condition: if we kill the build user before the
  child has done its setuid() to the build user uid, then it won't be
  killed, and we'll potentially lock up in pid.wait().  So also send a
  conventional kill to the child.
 2006-12-08 15:44:00 +00:00
Eelco Dolstra
d3fe6ab024 * Also for convenience, change the ownership of the build output even 
in case of failure.
 2006-12-08 00:19:50 +00:00
Eelco Dolstra
096194ab29 * Remove ancient terminology. 2006-12-07 23:58:36 +00:00
Eelco Dolstra
6833e8bbe8 * When keeping the temporary build directory (-K), change the owner 
back to the Nix account.
 2006-12-07 23:27:40 +00:00
Eelco Dolstra
e24d0201c2 * Doh! 2006-12-07 22:07:05 +00:00
Eelco Dolstra
2819eb36a4 * Be less verbose. 2006-12-07 21:43:35 +00:00
Eelco Dolstra
4ca01065c3 * Rename all those main.cc files. 2006-12-07 20:47:30 +00:00
Eelco Dolstra
d03f0d4117 * Check for lchown. 2006-12-07 18:51:11 +00:00
Eelco Dolstra
c3286ec020 * Don't count on the Pid deconstructor to kill the child process, 
since if we're running a build user in non-root mode, we can't.  Let
  the setuid helper do it.
 2006-12-07 17:52:58 +00:00
Eelco Dolstra
a82d80ddeb * Move setuidCleanup() to libutil. 2006-12-07 16:40:41 +00:00
Eelco Dolstra
f76fdb6d42 * If not running as root, let the setuid helper kill the build user's 
processes before and after the build.
 2006-12-07 16:33:31 +00:00
Eelco Dolstra
ec23ecc64d * In the garbage collector, if deleting a path fails, try to fix its 
ownership, then try again.
 2006-12-07 15:54:52 +00:00
Eelco Dolstra
a0a43c3206 * When not running as root, call the setuid helper to change the 
ownership of the build result after the build.
 2006-12-07 15:18:14 +00:00
Eelco Dolstra
6a07ff1ec0 * Change the ownership of store paths to the Nix account before 
deleting them using the setuid helper.
 2006-12-07 14:14:35 +00:00
Eelco Dolstra
7d8cf316ee * Pass the actual build user to the setuid helper. 2006-12-07 11:27:32 +00:00
Eelco Dolstra
a45c498e4e * If Nix is not running as root, call the setuid helper to start the 
builder under the desired build user.
 2006-12-07 00:42:30 +00:00
Eelco Dolstra
813a7c65c9 * Sanity check. 2006-12-07 00:19:27 +00:00
Eelco Dolstra
6a8e60913a * Move killUser() to libutil so that the setuid helper can use it. 2006-12-07 00:16:07 +00:00
Eelco Dolstra
79875c5e42 * Change the ownership of the current directory to the build user. 2006-12-06 23:52:25 +00:00
Eelco Dolstra
62ab131412 * Verify that the desired target user is in the build users group (as 
specified in the setuid config file).
 2006-12-06 23:15:26 +00:00
Eelco Dolstra
f07ac41656 * Check that the caller is allowed to call the setuid helper. The 
allowed uid is specified in a configuration file in
  /etc/nix-setuid.conf.
 2006-12-06 22:45:41 +00:00
Eelco Dolstra
173d328351 * Urgh. 2006-12-06 20:19:25 +00:00
Eelco Dolstra
ef281b93c2 * Fix the safety check. 2006-12-06 20:18:29 +00:00
Eelco Dolstra
a14d491f09 * Oops. 2006-12-06 20:16:28 +00:00
Eelco Dolstra
6e5ec1029a * Get rid of `build-users'. We'll just take all the members of 
`build-users-group'.  This makes configuration easier: you can just
  add users in /etc/group.
 2006-12-06 20:00:15 +00:00
Eelco Dolstra
751f6d2157 * nix-setuid-helper: allow running programs under a different uid. 2006-12-06 17:29:10 +00:00
Eelco Dolstra
9f0efa6611 * Start of the setuid helper (the program that performs the operations 
that have to be done as root: running builders under different uids,
  changing ownership of build results, and deleting paths in the store
  with the wrong ownership).
 2006-12-06 01:24:02 +00:00
Eelco Dolstra
2b558843a2 * Be less chatty. 2006-12-05 19:01:19 +00:00
Eelco Dolstra
44cad9630f * Urgh. Do setgid() before setuid(), because the semantics of setgid() 
changes completely depending on whether you're root...
 2006-12-05 18:28:15 +00:00
Eelco Dolstra
6f0d050324 * Tricky: child processes should not send data to the client since 
that might mess up the protocol.  And besides, the socket file
  descriptor is probably closed.
 2006-12-05 18:21:16 +00:00
Eelco Dolstra
4c1c37d0b6 * FreeBSD returns ESRCH when there are no processes to kill. 2006-12-05 18:07:46 +00:00
Eelco Dolstra
8d1854c3f1 * Oops! In daemon mode, we can't run as root either if build-users is empty. 2006-12-05 17:44:19 +00:00
Eelco Dolstra
99655245ae * Use an explicit handler for SIGCHLD, since SIG_IGN doesn't do the 
right thing on FreeBSD 4 (it leaves zombies).
 2006-12-05 17:21:42 +00:00
Eelco Dolstra
62b0497c0f * Better message. 2006-12-05 16:17:01 +00:00
Eelco Dolstra
c808e6252f * Ugly hack to handle spurious SIGPOLLs. 2006-12-05 15:36:31 +00:00
Eelco Dolstra
fd4a9db91f * Some renaming. 2006-12-05 14:15:51 +00:00
Eelco Dolstra
fc1c20d11b * Redundant. 2006-12-05 13:57:35 +00:00
Eelco Dolstra
a9c4f66cfb * Allow unprivileged users to run the garbage collector and to do 
`nix-store --delete'.  But unprivileged users are not allowed to
  ignore liveness.
* `nix-store --delete --ignore-liveness': ignore the runtime roots as
  well.
 2006-12-05 02:18:46 +00:00
Eelco Dolstra
29cf434a35 * The determination of the root set should be made by the privileged 
process, so forward the operation.
* Spam the user about GC misconfigurations (NIX-71).
* findRoots: skip all roots that are unreadable - the warnings with
  which we spam the user should be enough.
 2006-12-05 01:31:45 +00:00
Eelco Dolstra
8623256f48 * findRoots: return a map from the symlink (outside of the store) to 
the store path (inside the store).
 2006-12-05 00:48:36 +00:00
Eelco Dolstra
d27a73b1a9 * In addPermRoot, check that the root that we just registered can be 
found by the garbage collector.  This addresses NIX-71 and is a
  particular concern in multi-user stores.
 2006-12-05 00:34:42 +00:00
Eelco Dolstra
74033a844f * Add indirect root registration to the protocol so that unprivileged 
processes can register indirect roots.  Of course, there is still
  the problem that the garbage collector can only read the targets of
  the indirect roots when it's running as root...
 2006-12-04 23:29:16 +00:00
Eelco Dolstra
0d40f6d7bb * Not every OS knows about SIGPOLL. 2006-12-04 22:58:44 +00:00
Eelco Dolstra
7751160e9f * Don't redirect stderr. 2006-12-04 19:10:23 +00:00
Eelco Dolstra
40c3529909 * Handle exceptions and stderr for all protocol functions. 
* SIGIO -> SIGPOLL (POSIX calls it that).
* Use sigaction instead of signal to register the SIGPOLL handler.
  Sigaction is better defined, and a handler registered with signal
  appears not to interrupt fcntl(..., F_SETLKW, ...), which is bad.
 2006-12-04 17:55:14 +00:00
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
4740baf3a6 * When NIX_REMOTE=daemon, connect to /nix/var/nix/daemon.socket 
instead of forking a worker.
 2006-12-04 14:21:39 +00:00
Eelco Dolstra
f5f0cf423f * Refactoring. 2006-12-04 13:28:14 +00:00
Eelco Dolstra
052b6fb149 * Pass the verbosity level to the worker. 2006-12-04 13:15:29 +00:00