/* GNU Guix --- Functional package management for GNU Copyright (C) 2012, 2013, 2014, 2015, 2016, 2017, 2018 Ludovic Courtès Copyright (C) 2006, 2010, 2012, 2014 Eelco Dolstra 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 . */ #include #include #include "shared.hh" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* 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 (const std::vector &); /* Command-line options. */ #define n_(str) str #define _(str) gettext (str) static const char guix_textdomain[] = "guix"; const char *argp_program_version = "guix-daemon (" PACKAGE_NAME ") " PACKAGE_VERSION; const char *argp_program_bug_address = PACKAGE_BUGREPORT; 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 #define GUIX_OPT_TIMEOUT 18 #define GUIX_OPT_MAX_SILENT_TIME 19 #define GUIX_OPT_LOG_COMPRESSION 20 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") }, { "timeout", GUIX_OPT_TIMEOUT, n_("SECONDS"), 0, n_("mark builds as failed after SECONDS of activity") }, { "max-silent-time", GUIX_OPT_MAX_SILENT_TIME, n_("SECONDS"), 0, n_("mark builds as failed after SECONDS of silence") }, { "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, OPTION_HIDDEN, // deprecated n_("disable compression of the build logs") }, { "log-compression", GUIX_OPT_LOG_COMPRESSION, "TYPE", 0, n_("use the specified compression type for 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 } }; /* Default port for '--listen' on TCP/IP. */ #define DEFAULT_GUIX_PORT "44146" /* List of '--listen' options. */ static std::list listen_options; /* 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_LOG_COMPRESSION: if (strcmp (arg, "none") == 0) settings.logCompression = COMPRESSION_NONE; else if (strcmp (arg, "gzip") == 0) settings.logCompression = COMPRESSION_GZIP; #if HAVE_BZLIB_H else if (strcmp (arg, "bzip2") == 0) settings.logCompression = COMPRESSION_BZIP2; #endif else { fprintf (stderr, _("error: %s: unknown compression type\n"), arg); exit (EXIT_FAILURE); } break; case GUIX_OPT_DISABLE_LOG_COMPRESSION: settings.logCompression = COMPRESSION_NONE; 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: listen_options.push_back (arg); break; case GUIX_OPT_SUBSTITUTE_URLS: settings.set ("substitute-urls", arg); break; case GUIX_OPT_NO_SUBSTITUTES: settings.set ("build-use-substitutes", "false"); b2018-05-28system: Remove uses of the 'title' field of <file-system>....Ludovic Courtès IONS: 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_TIMEOUT: settings.set ("build-timeout", arg); break; case GUIX_OPT_MAX_SILENT_TIME: settings.set ("build-max-silent-time", 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 }; static int open_unix_domain_socket (const char *file) { /* Create and bind to a Unix domain socket. */ AutoCloseFD fdSocket = socket (PF_UNIX, SOCK_STREAM, 0); if (fdSocket == -1) throw SysError (_("cannot create Unix domain socket")); createDirs (dirOf (file)); /* Urgh, sockaddr_un allows path names of only 108 characters. So chdir to the socket directory so that we can pass a relative path name. */ if (chdir (dirOf (file).c_str ()) == -1) throw SysError (_("cannot change current directory")); Path fileRel = "./" + baseNameOf (file); struct sockaddr_un addr; addr.sun_family = AF_UNIX; if (fileRel.size () >= sizeof (addr.sun_path)) throw Error (format (_("socket file name '%1%' is too long")) % fileRel); strcpy (addr.sun_path, fileRel.c_str ()); unlink (file); /* Make sure that the socket is created with 0666 permission (everybody can connect --- provided they have access to the directory containing the socket). */ mode_t oldMode = umask (0111); int res = bind (fdSocket, (struct sockaddr *) &addr, sizeof addr); umask (oldMode); if (res == -1) throw SysError (format (_("cannot bind to socket '%1%'")) % file); if (chdir ("/") == -1) /* back to the root */ throw SysError (_("cannot change current directory")); if (listen (fdSocket, 5) == -1) throw SysError (format (_("cannot listen on socket '%1%'")) % file); return fdSocket.borrow (); } /* Return a listening socket for ADDRESS, which has the given LENGTH. */ static int open_inet_socket (const struct sockaddr *address, socklen_t length) { AutoCloseFD fd = socket (address->sa_family, SOCK_STREAM, 0); if (fd == -1) throw SysError (_("cannot create TCP socket")); int res = bind (fd, address, length); if (res == -1) throw SysError (_("cannot bind TCP socket")); if (listen (fd, 5) == -1) throw SysError (format (_("cannot listen on TCP socket"))); return fd.borrow (); } /* Return a list of file descriptors of listening sockets. */ static std::vector listening_sockets (const std::list &options) { std::vector result; if (options.empty ()) { /* Open the default Unix-domain socket. */ auto fd = open_unix_domain_socket (settings.nixDaemonSocketFile.c_str ()); result.push_back (fd); return result; } /* Open the user-specified sockets. */ for (const std::string& option: options) { if (option[0] == '/') { /* Assume OPTION is the file name of a Unix-domain socket. */ settings.nixDaemonSocketFile = canonPath (option); int fd = open_unix_domain_socket (settings.nixDaemonSocketFile.c_str ()); result.push_back (fd); } else { /* Assume OPTIONS has the form "HOST" or "HOST:PORT". */ auto colon = option.find_last_of (":"); auto host = colon == std::string::npos ? option : option.substr (0, colon); auto port = colon == std::string::npos ? DEFAULT_GUIX_PORT : option.substr (colon + 1, option.size () - colon - 1); struct addrinfo *res, hints; memset (&hints, '\0', sizeof hints); hints.ai_socktype = SOCK_STREAM; hints.ai_flags = AI_NUMERICSERV | AI_ADDRCONFIG; int err = getaddrinfo (host.c_str(), port.c_str (), &hints, &res); if (err != 0) throw Error(format ("failed to look up '%1%': %2%") % option % gai_strerror (err)); printMsg (lvlDebug, format ("listening on '%1%', port '%2%'") % host % port); /* XXX: Pick the first result, RES. */ result.push_back (open_inet_socket (res->ai_addr, res->ai_addrlen)); freeaddrinfo (res); } } return result; } int main (int argc, char *argv[]) { 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 . */ 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 and one job at a time. */ settings.buildCores = 0; settings.maxBuildJobs = 1; 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_parse (&argp, argc, argv, 0, 0, 0); auto sockets = listening_sockets (listen_options); /* Effect all the changes made via 'settings.set'. */ settings.update (); printMsg(lvlDebug, format ("build log compression: %1%") % settings.logCompression); 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 (sockets); } catch (std::exception &e) { fprintf (stderr, _("error: %s\n"), e.what ()); return EXIT_FAILURE; } return EXIT_SUCCESS; /* never reached */ }