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| | /* GNU Guix --- Functional package management for GNU
Copyright (C) 2012, 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
Copyright (C) 2016 Alex Vong <alexvong1995@gmail.com>
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 <sys/stat.h>
#include <strings.h>
#include <exception>
#include <libintl.h>
#include <locale.h>
/* 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);
\f
/* Command-line options. */
#define n_(str) str
#define _(str) gettext (str)
static const char guix_textdomain[] = "guix";
static char doc[] =
n_("guix-daemon -- perform derivation builds and store accesses")
"\v\n"
n_("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_DEDUPLICATION 7
#define GUIX_OPT_IMPERSONATE_LINUX_26 8
#define GUIX_OPT_DEBUG 9
#define GUIX_OPT_CHROOT_DIR 10
#define GUIX_OPT_LISTEN 11
#define GUIX_OPT_NO_SUBSTITUTES 12
#define GUIX_OPT_SUBSTITUTE_URLS 13
#define GUIX_OPT_NO_BUILD_HOOK 14
#define GUIX_OPT_GC_KEEP_OUTPUTS 15
#define GUIX_OPT_GC_KEEP_DERIVATIONS 16
#define GUIX_OPT_BUILD_ROUNDS 17
static const struct argp_option options[] =
{
{ "system", GUIX_OPT_SYSTEM, n_("SYSTEM"), 0,
n_("assume SYSTEM as the current system type") },
{ "cores", 'c', n_("N"), 0,
n_("use N CPU cores to build each derivation; 0 means as many as available")
},
{ "max-jobs", 'M', n_("N"), 0,
n_("allow at most N build jobs") },
{ "disable-chroot", GUIX_OPT_DISABLE_CHROOT, 0, 0,
n_("disable chroot builds") },
{ "chroot-directory", GUIX_OPT_CHROOT_DIR, n_("DIR"), 0,
n_("add DIR to the build chroot") },
{ "build-users-group", GUIX_OPT_BUILD_USERS_GROUP, n_("GROUP"), 0,
n_("perform builds as a user of GROUP") },
{ "no-substitutes", GUIX_OPT_NO_SUBSTITUTES, 0, 0,
n_("do not use substitutes") },
{ "substitute-urls", GUIX_OPT_SUBSTITUTE_URLS, n_("URLS"), 0,
n_("use URLS as the default list of substitute providers") },
{ "no-build-hook", GUIX_OPT_NO_BUILD_HOOK, 0, 0,
n_("do not use the 'build hook'") },
{ "cache-failures", GUIX_OPT_CACHE_FAILURES, 0, 0,
n_("cache build failures") },
{ "rounds", GUIX_OPT_BUILD_ROUNDS, "N", 0,
n_("build each derivation N times in a row") },
{ "lose-logs", GUIX_OPT_LOSE_LOGS, 0, 0,
n_("do not keep build logs") },
{ "disable-log-compression", GUIX_OPT_DISABLE_LOG_COMPRESSION, 0, 0,
n_("disable compression of the build logs") },
/* '--disable-deduplication' was known as '--disable-store-optimization'
up to Guix 0.7 included, so keep the alias around. */
{ "disable-deduplication", GUIX_OPT_DISABLE_DEDUPLICATION, 0, 0,
n_("disable automatic file \"deduplication\" in the store") },
{ "disable-store-optimization", GUIX_OPT_DISABLE_DEDUPLICATION, 0,
OPTION_ALIAS | OPTION_HIDDEN, NULL },
{ "impersonate-linux-2.6", GUIX_OPT_IMPERSONATE_LINUX_26, 0,
#ifdef HAVE_SYS_PERSONALITY_H
0,
#else
OPTION_HIDDEN,
#endif
n_("impersonate Linux 2.6")
},
{ "gc-keep-outputs", GUIX_OPT_GC_KEEP_OUTPUTS,
"yes/no", OPTION_ARG_OPTIONAL,
n_("tell whether the GC must keep outputs of live derivations") },
{ "gc-keep-derivations", GUIX_OPT_GC_KEEP_DERIVATIONS,
"yes/no", OPTION_ARG_OPTIONAL,
n_("tell whether the GC must keep derivations corresponding \
to live outputs") },
{ "listen", GUIX_OPT_LISTEN, n_("SOCKET"), 0,
n_("listen for connections on SOCKET") },
{ "debug", GUIX_OPT_DEBUG, 0, 0,
n_("produce debugging output") },
{ 0, 0, 0, 0, 0 }
};
/* Convert ARG to a Boolean value, or throw an error if it does not denote a
Boolean. */
static bool
string_to_bool (const char *arg, bool dflt = true)
{
if (arg == NULL)
return dflt;
else if (strcasecmp (arg, "yes") == 0)
return true;
else if (strcasecmp (arg, "no") == 0)
return false;
else
throw nix::Error (format ("'%1%': invalid Boolean value") % arg);
}
/* 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:
{
std::string chroot_dirs;
chroot_dirs = settings.get ("build-extra-chroot-dirs",
(std::string) "");
if (chroot_dirs == "")
chroot_dirs = arg;
else
chroot_dirs = chroot_dirs + " " + arg;
settings.set("build-extra-chroot-dirs", chroot_dirs);
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_DEDUPLICATION:
settings.autoOptimiseStore = false;
break;
case GUIX_OPT_CACHE_FAILURES:
settings.cacheFailure = true;
break;
case GUIX_OPT_BUILD_ROUNDS:
{
char *end;
unsigned long n = strtoul (arg, &end, 10);
if (end != arg + strlen (arg))
{
fprintf (stderr, _("error: %s: invalid number of rounds\n"), arg);
exit (EXIT_FAILURE);
}
settings.set ("build-repeat", std::to_string (std::max (0UL, n - 1)));
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_SUBSTITUTE_URLS:
settings.set ("substitute-urls", arg);
break;
case GUIX_OPT_NO_SUBSTITUTES:
settings.set ("build-use-substitutes", "false");
break;
case GUIX_OPT_NO_BUILD_HOOK:
settings.useBuildHook = false;
break;
case GUIX_OPT_DEBUG:
verbosity = lvlDebug;
break;
case GUIX_OPT_GC_KEEP_OUTPUTS:
settings.gcKeepOutputs = string_to_bool (arg);
break;
case GUIX_OPT_GC_KEEP_DERIVATIONS:
settings.gcKeepDerivations = string_to_bool (arg);
break;
case 'c':
settings.set ("build-cores", arg);
break;
case 'M':
settings.set ("build-max-jobs", arg);
break;
case GUIX_OPT_SYSTEM:
settings.thisSystem = arg;
break;
default:
return (error_t) ARGP_ERR_UNKNOWN;
}
return (error_t) 0;
}
/* Argument parsing. */
static const struct argp argp =
{
options, parse_opt,
NULL, doc,
NULL, NULL, // children and help_filter
guix_textdomain
};
\f
int
main (int argc, char *argv[])
{
static const Strings nothing;
setlocale (LC_ALL, "");
bindtextdomain (guix_textdomain, LOCALEDIR);
textdomain (guix_textdomain);
/* Initialize libgcrypt. */
if (!gcry_check_version (GCRYPT_VERSION))
{
fprintf (stderr, _("error: libgcrypt version mismatch\n"));
exit (EXIT_FAILURE);
}
/* Tell Libgcrypt that initialization has completed, as per the Libgcrypt
1.6.0 manual (although this does not appear to be strictly needed.) */
gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
/* Set the umask so that the daemon does not end up creating group-writable
files, which would lead to "suspicious ownership or permission" errors.
See <http://lists.gnu.org/archive/html/bug-guix/2013-07/msg00033.html>. */
umask (S_IWGRP | S_IWOTH);
#ifndef HAVE_CHROOT
# error chroot is assumed to be available
#endif
/* Always use chroots by default. */
settings.useChroot = true;
/* Turn automatic deduplication on by default. */
settings.autoOptimiseStore = true;
/* Default to using as many cores as possible. */
settings.buildCores = 0;
argvSaved = argv;
try
{
settings.processEnvironment ();
/* Hackily help 'local-store.cc' find our 'guix-authenticate' program, which
is known as 'OPENSSL_PATH' here. */
std::string search_path;
search_path = settings.nixLibexecDir;
if (getenv ("PATH") != NULL)
{
search_path += ":";
search_path += getenv ("PATH");
}
setenv ("PATH", search_path.c_str (), 1);
/* Use our substituter by default. */
settings.substituters.clear ();
settings.set ("build-use-substitutes", "true");
/* Use our substitute server by default. */
settings.set ("substitute-urls", GUIX_SUBSTITUTE_URLS);
#ifdef HAVE_DAEMON_OFFLOAD_HOOK
/* Use our build hook for distributed builds by default. */
settings.useBuildHook = true;
if (getenv ("NIX_BUILD_HOOK") == NULL)
{
std::string build_hook;
build_hook = settings.nixLibexecDir + "/guix/offload";
setenv ("NIX_BUILD_HOOK", build_hook.c_str (), 1);
}
#else
/* We are not installing any build hook, so disable it. */
settings.useBuildHook = false;
#endif
argp_program_version = "guix-daemon (" PACKAGE_NAME ") " PACKAGE_VERSION;
argp_program_bug_address = PACKAGE_BUGREPORT;
argp_parse (&argp, argc, argv, 0, 0, 0);
/* Effect all the changes made via 'settings.set'. */
settings.update ();
if (settings.useSubstitutes)
{
string subs = getEnv ("NIX_SUBSTITUTERS", "default");
if (subs == "default")
{
string subst =
settings.nixLibexecDir + "/guix/substitute";
setenv ("NIX_SUBSTITUTERS", subst.c_str (), 1);
}
}
else
/* Clear the substituter list to make sure nothing ever gets
substituted, regardless of the client's settings. */
setenv ("NIX_SUBSTITUTERS", "", 1);
/* Effect the $NIX_SUBSTITUTERS change. */
settings.update ();
if (geteuid () == 0 && settings.buildUsersGroup.empty ())
fprintf (stderr, _("warning: daemon is running as root, so \
using `--build-users-group' is highly recommended\n"));
if (settings.useChroot)
{
std::string chroot_dirs;
chroot_dirs = settings.get ("build-extra-chroot-dirs",
(std::string) "");
printMsg (lvlDebug,
format ("extra chroot directories: '%1%'") % chroot_dirs);
}
printMsg (lvlDebug,
format ("automatic deduplication set to %1%")
% settings.autoOptimiseStore);
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 */
}
|