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/* GNU Guix --- Functional package management for GNU
Copyright (C) 2012, 2013 Ludovic Courtès <ludo@gnu.org>
This file is part of GNU Guix.
GNU Guix is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at
your option) any later version.
GNU Guix is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <types.hh>
#include "shared.hh"
#include <globals.hh>
#include <util.hh>
#include <gcrypt.h>
#include <stdlib.h>
#include <argp.h>
#include <unistd.h>
#include <sys/types.h>
#include <exception>
/* Variables used by `nix-daemon.cc'. */
volatile ::sig_atomic_t blockInt;
char **argvSaved;
using namespace nix;
/* Entry point in `nix-daemon.cc'. */
extern void run (Strings args);
/* Command-line options. */
const char *argp_program_version =
"guix-daemon (" PACKAGE_NAME ") " PACKAGE_VERSION;
const char *argp_program_bug_address = PACKAGE_BUGREPORT;
static char doc[] =
"guix-daemon -- perform derivation builds and store accesses\
\v\
This program is a daemon meant to run in the background. It serves \
requests sent over a Unix-domain socket. It accesses the store, and \
builds derivations on behalf of its clients.";
#define GUIX_OPT_SYSTEM 1
#define GUIX_OPT_DISABLE_CHROOT 2
#define GUIX_OPT_BUILD_USERS_GROUP 3
#define GUIX_OPT_CACHE_FAILURES 4
#define GUIX_OPT_LOSE_LOGS 5
#define GUIX_OPT_DISABLE_LOG_COMPRESSION 6
#define GUIX_OPT_DISABLE_STORE_OPTIMIZATION 7
#define GUIX_OPT_IMPERSONATE_LINUX_26 8
#define GUIX_OPT_DEBUG 9
#define GUIX_OPT_CHROOT_DIR 10
#define GUIX_OPT_LISTEN 11
static const struct argp_option options[] =
{
{ "system", GUIX_OPT_SYSTEM, "SYSTEM", 0,
"Assume SYSTEM as the current system type" },
{ "cores", 'c', "N", 0,
"Use N CPU cores to build each derivation; 0 means as many as available" },
{ "max-jobs", 'M', "N", 0,
"Allow at most N build jobs" },
{ "disable-chroot", GUIX_OPT_DISABLE_CHROOT, 0, 0,
"Disable chroot builds"
#ifndef HAVE_CHROOT
" (chroots are not supported in this configuration, so "
"this option has no effect)"
#endif
},
{ "chroot-directory", GUIX_OPT_CHROOT_DIR, "DIR", 0,
"Add DIR to the build chroot"
#ifndef HAVE_CHROOT
" (chroots are not supported in this configuration, so "
"this option has no effect)"
#endif
},
{ "build-users-group", GUIX_OPT_BUILD_USERS_GROUP, "GROUP", 0,
"Perform builds as a user of GROUP" },
{ "cache-failures", GUIX_OPT_CACHE_FAILURES, 0, 0,
"Cache build failures" },
{ "lose-logs", GUIX_OPT_LOSE_LOGS, 0, 0,
"Do not keep build logs" },
{ "disable-log-compression", GUIX_OPT_DISABLE_LOG_COMPRESSION, 0, 0,
"Disable compression of the build logs" },
{ "disable-store-optimization", GUIX_OPT_DISABLE_STORE_OPTIMIZATION, 0, 0,
"Disable automatic file \"deduplication\" in the store" },
{ "impersonate-linux-2.6", GUIX_OPT_IMPERSONATE_LINUX_26, 0, 0,
"Impersonate Linux 2.6"
#ifndef HAVE_SYS_PERSONALITY_H
" (this option has no effect in this configuration)"
#endif
},
{ "listen", GUIX_OPT_LISTEN, "SOCKET", 0,
"Listen for connections on SOCKET" },
{ "debug", GUIX_OPT_DEBUG, 0, 0,
"Produce debugging output" },
{ 0, 0, 0, 0, 0 }
};
/* Parse a single option. */
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case GUIX_OPT_DISABLE_CHROOT:
settings.useChroot = false;
break;
case GUIX_OPT_CHROOT_DIR:
settings.dirsInChroot.insert (arg);
break;
case GUIX_OPT_DISABLE_LOG_COMPRESSION:
settings.compressLog = false;
break;
case GUIX_OPT_BUILD_USERS_GROUP:
settings.buildUsersGroup = arg;
break;
case GUIX_OPT_DISABLE_STORE_OPTIMIZATION:
settings.autoOptimiseStore = false;
break;
case GUIX_OPT_CACHE_FAILURES:
settings.cacheFailure = true;
break;
case GUIX_OPT_IMPERSONATE_LINUX_26:
settings.impersonateLinux26 = true;
break;
case GUIX_OPT_LOSE_LOGS:
settings.keepLog = false;
break;
case GUIX_OPT_LISTEN:
try
{
settings.nixDaemonSocketFile = canonPath (arg);
}
catch (std::exception &e)
{
fprintf (stderr, "error: %s\n", e.what ());
exit (EXIT_FAILURE);
}
break;
case GUIX_OPT_DEBUG:
verbosity = lvlDebug;
break;
case 'c':
settings.buildCores = atoi (arg);
break;
case 'M':
settings.maxBuildJobs = atoi (arg);
break;
case GUIX_OPT_SYSTEM:
settings.thisSystem = arg;
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
/* Argument parsing. */
static struct argp argp = { options, parse_opt, 0, doc };
int
main (int argc, char *argv[])
{
Strings nothing;
/* Initialize libgcrypt. */
if (!gcry_check_version (GCRYPT_VERSION))
{
fprintf (stderr, "error: libgcrypt version mismatch\n");
exit (EXIT_FAILURE);
}
#ifdef HAVE_CHROOT
settings.useChroot = true;
#else
settings.useChroot = false;
#endif
argvSaved = argv;
try
{
settings.processEnvironment ();
/* Use our substituter by default. */
settings.substituters.clear ();
string subs = getEnv ("NIX_SUBSTITUTERS", "default");
if (subs == "default")
/* XXX: No substituters until we have something that works. */
settings.substituters.clear ();
// settings.substituters.push_back (settings.nixLibexecDir
// + "/guix/substitute-binary");
else
settings.substituters = tokenizeString<Strings> (subs, ":");
argp_parse (&argp, argc, argv, 0, 0, 0);
if (geteuid () == 0 && settings.buildUsersGroup.empty ())
fprintf (stderr, "warning: daemon is running as root, so "
"using `--build-users-group' is highly recommended\n");
#ifdef HAVE_CHROOT
if (settings.useChroot)
{
foreach (PathSet::iterator, i, settings.dirsInChroot)
{
printMsg (lvlDebug,
format ("directory `%1%' added to the chroot") % *i);
}
}
#endif
printMsg (lvlDebug,
format ("listening on `%1%'") % settings.nixDaemonSocketFile);
run (nothing);
}
catch (std::exception &e)
{
fprintf (stderr, "error: %s\n", e.what ());
return EXIT_FAILURE;
}
return EXIT_SUCCESS; /* never reached */
}