341 lines
9.6 KiB
C++
341 lines
9.6 KiB
C++
/* GNU Guix --- Functional package management for GNU
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Copyright (C) 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
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This file is part of GNU Guix.
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GNU Guix is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at
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your option) any later version.
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GNU Guix is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <types.hh>
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#include "shared.hh"
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#include <globals.hh>
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#include <util.hh>
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#include <gcrypt.h>
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#include <stdlib.h>
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#include <argp.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <strings.h>
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#include <exception>
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/* Variables used by `nix-daemon.cc'. */
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volatile ::sig_atomic_t blockInt;
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char **argvSaved;
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using namespace nix;
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/* Entry point in `nix-daemon.cc'. */
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extern void run (Strings args);
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/* Command-line options. */
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const char *argp_program_version =
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"guix-daemon (" PACKAGE_NAME ") " PACKAGE_VERSION;
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const char *argp_program_bug_address = PACKAGE_BUGREPORT;
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static char doc[] =
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"guix-daemon -- perform derivation builds and store accesses\
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\v\
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This program is a daemon meant to run in the background. It serves \
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requests sent over a Unix-domain socket. It accesses the store, and \
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builds derivations on behalf of its clients.";
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#define GUIX_OPT_SYSTEM 1
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#define GUIX_OPT_DISABLE_CHROOT 2
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#define GUIX_OPT_BUILD_USERS_GROUP 3
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#define GUIX_OPT_CACHE_FAILURES 4
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#define GUIX_OPT_LOSE_LOGS 5
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#define GUIX_OPT_DISABLE_LOG_COMPRESSION 6
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#define GUIX_OPT_DISABLE_STORE_OPTIMIZATION 7
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#define GUIX_OPT_IMPERSONATE_LINUX_26 8
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#define GUIX_OPT_DEBUG 9
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#define GUIX_OPT_CHROOT_DIR 10
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#define GUIX_OPT_LISTEN 11
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#define GUIX_OPT_NO_SUBSTITUTES 12
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#define GUIX_OPT_NO_BUILD_HOOK 13
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#define GUIX_OPT_GC_KEEP_OUTPUTS 14
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#define GUIX_OPT_GC_KEEP_DERIVATIONS 15
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static const struct argp_option options[] =
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{
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{ "system", GUIX_OPT_SYSTEM, "SYSTEM", 0,
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"Assume SYSTEM as the current system type" },
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{ "cores", 'c', "N", 0,
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"Use N CPU cores to build each derivation; 0 means as many as available" },
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{ "max-jobs", 'M', "N", 0,
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"Allow at most N build jobs" },
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{ "disable-chroot", GUIX_OPT_DISABLE_CHROOT, 0, 0,
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"Disable chroot builds"
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#ifndef HAVE_CHROOT
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" (chroots are not supported in this configuration, so "
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"this option has no effect)"
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#endif
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},
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{ "chroot-directory", GUIX_OPT_CHROOT_DIR, "DIR", 0,
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"Add DIR to the build chroot"
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#ifndef HAVE_CHROOT
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" (chroots are not supported in this configuration, so "
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"this option has no effect)"
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#endif
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},
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{ "build-users-group", GUIX_OPT_BUILD_USERS_GROUP, "GROUP", 0,
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"Perform builds as a user of GROUP" },
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{ "no-substitutes", GUIX_OPT_NO_SUBSTITUTES, 0, 0,
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"Do not use substitutes" },
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{ "no-build-hook", GUIX_OPT_NO_BUILD_HOOK, 0, 0,
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"Do not use the 'build hook'" },
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{ "cache-failures", GUIX_OPT_CACHE_FAILURES, 0, 0,
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"Cache build failures" },
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{ "lose-logs", GUIX_OPT_LOSE_LOGS, 0, 0,
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"Do not keep build logs" },
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{ "disable-log-compression", GUIX_OPT_DISABLE_LOG_COMPRESSION, 0, 0,
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"Disable compression of the build logs" },
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{ "disable-store-optimization", GUIX_OPT_DISABLE_STORE_OPTIMIZATION, 0, 0,
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"Disable automatic file \"deduplication\" in the store" },
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{ "impersonate-linux-2.6", GUIX_OPT_IMPERSONATE_LINUX_26, 0, 0,
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"Impersonate Linux 2.6"
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#ifndef HAVE_SYS_PERSONALITY_H
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" (this option has no effect in this configuration)"
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#endif
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},
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{ "gc-keep-outputs", GUIX_OPT_GC_KEEP_OUTPUTS,
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"yes/no", OPTION_ARG_OPTIONAL,
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"Tell whether the GC must keep outputs of live derivations" },
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{ "gc-keep-derivations", GUIX_OPT_GC_KEEP_DERIVATIONS,
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"yes/no", OPTION_ARG_OPTIONAL,
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"Tell whether the GC must keep derivations corresponding \
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to live outputs" },
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{ "listen", GUIX_OPT_LISTEN, "SOCKET", 0,
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"Listen for connections on SOCKET" },
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{ "debug", GUIX_OPT_DEBUG, 0, 0,
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"Produce debugging output" },
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{ 0, 0, 0, 0, 0 }
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};
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/* Convert ARG to a Boolean value, or throw an error if it does not denote a
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Boolean. */
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static bool
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string_to_bool (const char *arg, bool dflt = true)
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{
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if (arg == NULL)
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return dflt;
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else if (strcasecmp (arg, "yes") == 0)
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return true;
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else if (strcasecmp (arg, "no") == 0)
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return false;
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else
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throw nix::Error (format ("'%1%': invalid Boolean value") % arg);
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}
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/* Parse a single option. */
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static error_t
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parse_opt (int key, char *arg, struct argp_state *state)
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{
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switch (key)
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{
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case GUIX_OPT_DISABLE_CHROOT:
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settings.useChroot = false;
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break;
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case GUIX_OPT_CHROOT_DIR:
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settings.dirsInChroot.insert (arg);
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break;
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case GUIX_OPT_DISABLE_LOG_COMPRESSION:
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settings.compressLog = false;
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break;
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case GUIX_OPT_BUILD_USERS_GROUP:
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settings.buildUsersGroup = arg;
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break;
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case GUIX_OPT_DISABLE_STORE_OPTIMIZATION:
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settings.autoOptimiseStore = false;
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break;
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case GUIX_OPT_CACHE_FAILURES:
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settings.cacheFailure = true;
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break;
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case GUIX_OPT_IMPERSONATE_LINUX_26:
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settings.impersonateLinux26 = true;
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break;
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case GUIX_OPT_LOSE_LOGS:
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settings.keepLog = false;
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break;
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case GUIX_OPT_LISTEN:
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try
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{
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settings.nixDaemonSocketFile = canonPath (arg);
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}
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catch (std::exception &e)
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{
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fprintf (stderr, "error: %s\n", e.what ());
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exit (EXIT_FAILURE);
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}
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break;
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case GUIX_OPT_NO_SUBSTITUTES:
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settings.set ("build-use-substitutes", "false");
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break;
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case GUIX_OPT_NO_BUILD_HOOK:
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settings.useBuildHook = false;
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break;
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case GUIX_OPT_DEBUG:
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verbosity = lvlDebug;
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break;
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case GUIX_OPT_GC_KEEP_OUTPUTS:
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settings.gcKeepOutputs = string_to_bool (arg);
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break;
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case GUIX_OPT_GC_KEEP_DERIVATIONS:
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settings.gcKeepDerivations = string_to_bool (arg);
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break;
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case 'c':
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settings.set ("build-cores", arg);
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break;
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case 'M':
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settings.set ("build-max-jobs", arg);
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break;
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case GUIX_OPT_SYSTEM:
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settings.thisSystem = arg;
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break;
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default:
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return (error_t) ARGP_ERR_UNKNOWN;
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}
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return (error_t) 0;
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}
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/* Argument parsing. */
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static struct argp argp = { options, parse_opt, 0, doc };
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int
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main (int argc, char *argv[])
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{
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Strings nothing;
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/* Initialize libgcrypt. */
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if (!gcry_check_version (GCRYPT_VERSION))
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{
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fprintf (stderr, "error: libgcrypt version mismatch\n");
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exit (EXIT_FAILURE);
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}
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/* Tell Libgcrypt that initialization has completed, as per the Libgcrypt
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1.6.0 manual (although this does not appear to be strictly needed.) */
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gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
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/* Set the umask so that the daemon does not end up creating group-writable
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files, which would lead to "suspicious ownership or permission" errors.
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See <http://lists.gnu.org/archive/html/bug-guix/2013-07/msg00033.html>. */
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umask (S_IWGRP | S_IWOTH);
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#ifdef HAVE_CHROOT
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settings.useChroot = true;
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#else
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settings.useChroot = false;
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#endif
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argvSaved = argv;
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try
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{
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settings.processEnvironment ();
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/* Hackily help 'local-store.cc' find our 'guix-authenticate' program, which
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is known as 'OPENSSL_PATH' here. */
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std::string search_path;
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search_path = settings.nixLibexecDir;
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if (getenv ("PATH") != NULL)
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{
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search_path += ":";
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search_path += getenv ("PATH");
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}
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setenv ("PATH", search_path.c_str (), 1);
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/* Use our substituter by default. */
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settings.substituters.clear ();
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settings.set ("build-use-substitutes", "true");
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#ifdef HAVE_DAEMON_OFFLOAD_HOOK
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/* Use our build hook for distributed builds by default. */
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settings.useBuildHook = true;
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if (getenv ("NIX_BUILD_HOOK") == NULL)
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{
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std::string build_hook;
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build_hook = settings.nixLibexecDir + "/guix/offload";
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setenv ("NIX_BUILD_HOOK", build_hook.c_str (), 1);
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}
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#else
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/* We are not installing any build hook, so disable it. */
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settings.useBuildHook = false;
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#endif
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argp_parse (&argp, argc, argv, 0, 0, 0);
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/* Effect all the changes made via 'settings.set'. */
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settings.update ();
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if (settings.useSubstitutes)
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{
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string subs = getEnv ("NIX_SUBSTITUTERS", "default");
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if (subs == "default")
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{
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string subst =
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settings.nixLibexecDir + "/guix/substitute-binary";
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setenv ("NIX_SUBSTITUTERS", subst.c_str (), 1);
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}
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}
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else
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/* Clear the substituter list to make sure nothing ever gets
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substituted, regardless of the client's settings. */
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setenv ("NIX_SUBSTITUTERS", "", 1);
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/* Effect the $NIX_SUBSTITUTERS change. */
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settings.update ();
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if (geteuid () == 0 && settings.buildUsersGroup.empty ())
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fprintf (stderr, "warning: daemon is running as root, so "
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"using `--build-users-group' is highly recommended\n");
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#ifdef HAVE_CHROOT
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if (settings.useChroot)
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{
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foreach (PathSet::iterator, i, settings.dirsInChroot)
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{
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printMsg (lvlDebug,
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format ("directory `%1%' added to the chroot") % *i);
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}
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}
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#endif
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printMsg (lvlDebug,
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format ("listening on `%1%'") % settings.nixDaemonSocketFile);
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run (nothing);
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}
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catch (std::exception &e)
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{
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fprintf (stderr, "error: %s\n", e.what ());
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS; /* never reached */
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}
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