X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fmain.c;h=bfc48e5e39a35c4b81abadc4e455b72b83c8bd7e;hp=3291561e099bbacc0d45bec83013ae47d523b7e4;hb=27d340c772fb1b251085dba7bd5420484f7c5892;hpb=aa1671320df5bd8aa4108c0efb34a49fdedd0e5f diff --git a/src/main.c b/src/main.c index 3291561e0..bfc48e5e3 100644 --- a/src/main.c +++ b/src/main.c @@ -41,6 +41,7 @@ #include "kmod-setup.h" #include "locale-setup.h" #include "selinux-setup.h" +#include "machine-id-setup.h" #include "load-fragment.h" #include "fdset.h" #include "special.h" @@ -50,6 +51,7 @@ #include "label.h" #include "build.h" #include "strv.h" +#include "def.h" static enum { ACTION_RUN, @@ -73,7 +75,8 @@ static bool arg_sysv_console = true; static bool arg_mount_auto = true; static bool arg_swap_auto = true; static char **arg_default_controllers = NULL; -static ExecOutput arg_default_std_output = EXEC_OUTPUT_INHERIT; +static char ***arg_join_controllers = NULL; +static ExecOutput arg_default_std_output = EXEC_OUTPUT_SYSLOG; static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT; static FILE* serialization = NULL; @@ -167,7 +170,7 @@ _noreturn_ static void crash(int sig) { _exit(1); } - log_info("Successfully spawned crash shall as pid %lu.", (unsigned long) pid); + log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid); } log_info("Freezing execution."); @@ -201,7 +204,7 @@ static int console_setup(bool do_reset) { return -tty_fd; } - if ((r = reset_terminal(tty_fd)) < 0) + if ((r = reset_terminal_fd(tty_fd)) < 0) log_error("Failed to reset /dev/console: %s", strerror(-r)); close_nointr_nofail(tty_fd); @@ -225,6 +228,7 @@ static int parse_proc_cmdline_word(const char *word) { static const char * const rlmap[] = { "emergency", SPECIAL_EMERGENCY_TARGET, + "-b", SPECIAL_EMERGENCY_TARGET, "single", SPECIAL_RESCUE_TARGET, "-s", SPECIAL_RESCUE_TARGET, "s", SPECIAL_RESCUE_TARGET, @@ -365,11 +369,12 @@ static int parse_proc_cmdline_word(const char *word) { return 0; } -static int config_parse_level( +static int config_parse_level2( const char *filename, unsigned line, const char *section, const char *lvalue, + int ltype, const char *rvalue, void *data, void *userdata) { @@ -387,6 +392,7 @@ static int config_parse_target( unsigned line, const char *section, const char *lvalue, + int ltype, const char *rvalue, void *data, void *userdata) { @@ -404,6 +410,7 @@ static int config_parse_color( unsigned line, const char *section, const char *lvalue, + int ltype, const char *rvalue, void *data, void *userdata) { @@ -421,6 +428,7 @@ static int config_parse_location( unsigned line, const char *section, const char *lvalue, + int ltype, const char *rvalue, void *data, void *userdata) { @@ -433,11 +441,12 @@ static int config_parse_location( return 0; } -static int config_parse_cpu_affinity( +static int config_parse_cpu_affinity2( const char *filename, unsigned line, const char *section, const char *lvalue, + int ltype, const char *rvalue, void *data, void *userdata) { @@ -486,34 +495,146 @@ static int config_parse_cpu_affinity( return 0; } -static DEFINE_CONFIG_PARSE_ENUM(config_parse_output, exec_output, ExecOutput, "Failed to parse output specifier"); +static void strv_free_free(char ***l) { + char ***i; + + if (!l) + return; + + for (i = l; *i; i++) + strv_free(*i); + + free(l); +} + +static void free_join_controllers(void) { + if (!arg_join_controllers) + return; + + strv_free_free(arg_join_controllers); + arg_join_controllers = NULL; +} + +static int config_parse_join_controllers( + const char *filename, + unsigned line, + const char *section, + const char *lvalue, + int ltype, + const char *rvalue, + void *data, + void *userdata) { + + unsigned n = 0; + char *state, *w; + size_t length; + + assert(filename); + assert(lvalue); + assert(rvalue); + + free_join_controllers(); + + FOREACH_WORD_QUOTED(w, length, rvalue, state) { + char *s, **l; + + s = strndup(w, length); + if (!s) + return -ENOMEM; + + l = strv_split(s, ","); + free(s); + + strv_uniq(l); + + if (strv_length(l) <= 1) { + strv_free(l); + continue; + } + + if (!arg_join_controllers) { + arg_join_controllers = new(char**, 2); + if (!arg_join_controllers) { + strv_free(l); + return -ENOMEM; + } + + arg_join_controllers[0] = l; + arg_join_controllers[1] = NULL; + + n = 1; + } else { + char ***a; + char ***t; + + t = new0(char**, n+2); + if (!t) { + strv_free(l); + return -ENOMEM; + } + + n = 0; + + for (a = arg_join_controllers; *a; a++) { + + if (strv_overlap(*a, l)) { + char **c; + + c = strv_merge(*a, l); + if (!c) { + strv_free(l); + strv_free_free(t); + return -ENOMEM; + } + + strv_free(l); + l = c; + } else { + char **c; + + c = strv_copy(*a); + if (!c) { + strv_free(l); + strv_free_free(t); + return -ENOMEM; + } + + t[n++] = c; + } + } + + t[n++] = strv_uniq(l); + + strv_free_free(arg_join_controllers); + arg_join_controllers = t; + } + } + + return 0; +} static int parse_config_file(void) { - const ConfigItem items[] = { - { "LogLevel", config_parse_level, NULL, "Manager" }, - { "LogTarget", config_parse_target, NULL, "Manager" }, - { "LogColor", config_parse_color, NULL, "Manager" }, - { "LogLocation", config_parse_location, NULL, "Manager" }, - { "DumpCore", config_parse_bool, &arg_dump_core, "Manager" }, - { "CrashShell", config_parse_bool, &arg_crash_shell, "Manager" }, - { "ShowStatus", config_parse_bool, &arg_show_status, "Manager" }, + const ConfigTableItem items[] = { + { "Manager", "LogLevel", config_parse_level2, 0, NULL }, + { "Manager", "LogTarget", config_parse_target, 0, NULL }, + { "Manager", "LogColor", config_parse_color, 0, NULL }, + { "Manager", "LogLocation", config_parse_location, 0, NULL }, + { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core }, + { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell }, + { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status }, #ifdef HAVE_SYSV_COMPAT - { "SysVConsole", config_parse_bool, &arg_sysv_console, "Manager" }, + { "Manager", "SysVConsole", config_parse_bool, 0, &arg_sysv_console }, #endif - { "CrashChVT", config_parse_int, &arg_crash_chvt, "Manager" }, - { "CPUAffinity", config_parse_cpu_affinity, NULL, "Manager" }, - { "MountAuto", config_parse_bool, &arg_mount_auto, "Manager" }, - { "SwapAuto", config_parse_bool, &arg_swap_auto, "Manager" }, - { "DefaultControllers", config_parse_strv, &arg_default_controllers, "Manager" }, - { "DefaultStandardOutput", config_parse_output, &arg_default_std_output, "Manager" }, - { "DefaultStandardError", config_parse_output, &arg_default_std_error, "Manager" }, - { NULL, NULL, NULL, NULL } - }; - - static const char * const sections[] = { - "Manager", - NULL + { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt }, + { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL }, + { "Manager", "MountAuto", config_parse_bool, 0, &arg_mount_auto }, + { "Manager", "SwapAuto", config_parse_bool, 0, &arg_swap_auto }, + { "Manager", "DefaultControllers", config_parse_strv, 0, &arg_default_controllers }, + { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output }, + { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error }, + { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers }, + { NULL, NULL, NULL, 0, NULL } }; FILE *f; @@ -521,8 +642,8 @@ static int parse_config_file(void) { int r; fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE; - - if (!(f = fopen(fn, "re"))) { + f = fopen(fn, "re"); + if (!f) { if (errno == ENOENT) return 0; @@ -530,7 +651,8 @@ static int parse_config_file(void) { return 0; } - if ((r = config_parse(fn, f, sections, items, false, NULL)) < 0) + r = config_parse(fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL); + if (r < 0) log_warning("Failed to parse configuration file: %s", strerror(-r)); fclose(f); @@ -543,6 +665,11 @@ static int parse_proc_cmdline(void) { int r; size_t l; + /* Don't read /proc/cmdline if we are in a container, since + * that is only relevant for the host system */ + if (detect_container(NULL) > 0) + return 0; + if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) { log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); return 0; @@ -623,7 +750,10 @@ static int parse_argv(int argc, char *argv[]) { assert(argc >= 1); assert(argv); - while ((c = getopt_long(argc, argv, "hD", options, NULL)) >= 0) + if (getpid() == 1) + opterr = 0; + + while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0) switch (c) { @@ -799,23 +929,48 @@ static int parse_argv(int argc, char *argv[]) { log_set_max_level(LOG_DEBUG); break; - case '?': - return -EINVAL; + case 'b': + case 's': + case 'z': + /* Just to eat away the sysvinit kernel + * cmdline args without getopt() error + * messages that we'll parse in + * parse_proc_cmdline_word() or ignore. */ + case '?': default: - log_error("Unknown option code %c", c); - return -EINVAL; + if (getpid() != 1) { + log_error("Unknown option code %c", c); + return -EINVAL; + } + + break; } - /* PID 1 will get the kernel arguments as parameters, which we - * ignore and unconditionally read from - * /proc/cmdline. However, we need to ignore those arguments - * here. */ - if (arg_running_as != MANAGER_SYSTEM && optind < argc) { + if (optind < argc && getpid() != 1) { + /* Hmm, when we aren't run as init system + * let's complain about excess arguments */ + log_error("Excess arguments."); return -EINVAL; } + if (detect_container(NULL) > 0) { + char **a; + + /* All /proc/cmdline arguments the kernel didn't + * understand it passed to us. We're not really + * interested in that usually since /proc/cmdline is + * more interesting and complete. With one exception: + * if we are run in a container /proc/cmdline is not + * relevant for the container, hence we rely on argv[] + * instead. */ + + for (a = argv; a < argv + argc; a++) + if ((r = parse_proc_cmdline_word(*a)) < 0) + return r; + } + return 0; } @@ -857,6 +1012,9 @@ static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) { assert(_f); assert(_fds); + /* Make sure nothing is really destructed when we shut down */ + m->n_reloading ++; + if ((r = manager_open_serialization(m, &f)) < 0) { log_error("Failed to create serialization file: %s", strerror(-r)); goto fail; @@ -941,39 +1099,46 @@ static void test_mtab(void) { } static void test_usr(void) { - struct stat a, b; - bool separate = false; /* Check that /usr is not a separate fs */ - if (lstat("/", &a) >= 0 && lstat("/usr", &b) >= 0) - if (a.st_dev != b.st_dev) - separate = true; + if (dir_is_empty("/usr") <= 0) + return; - /* This check won't work usually during boot, since /usr is - * probably not mounted yet, hence let's add a second - * check. We just check whether /usr is an empty directory. */ + log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. " + "Some things will probably break (sometimes even silently) in mysterious ways. " + "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information."); +} - if (dir_is_empty("/usr") > 0) - separate = true; +static void test_cgroups(void) { - if (!separate) + if (access("/proc/cgroups", F_OK) >= 0) return; - log_warning("/usr appears to be on a different file system than /. This is not supported anymore. " - "Some things will probably break (sometimes even silently) in mysterious ways. " - "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information."); + log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. " + "Systems without control groups are not supported. " + "We will now sleep for 10s, and then continue boot-up. " + "Expect breakage and please do not file bugs. " + "Instead fix your kernel and enable CONFIG_CGROUPS." ); + + sleep(10); } int main(int argc, char *argv[]) { Manager *m = NULL; int r, retval = EXIT_FAILURE; + usec_t before_startup, after_startup; + char timespan[FORMAT_TIMESPAN_MAX]; FDSet *fds = NULL; bool reexecute = false; const char *shutdown_verb = NULL; dual_timestamp initrd_timestamp = { 0ULL, 0ULL }; char systemd[] = "systemd"; + bool is_reexec = false; + int j; + bool loaded_policy = false; +#ifdef HAVE_SYSV_COMPAT if (getpid() != 1 && strstr(program_invocation_short_name, "init")) { /* This is compatibility support for SysV, where * calling init as a user is identical to telinit. */ @@ -983,6 +1148,17 @@ int main(int argc, char *argv[]) { log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m"); return 1; } +#endif + + /* Determine if this is a reexecution or normal bootup. We do + * the full command line parsing much later, so let's just + * have a quick peek here. */ + + for (j = 1; j < argc; j++) + if (streq(argv[j], "--deserialize")) { + is_reexec = true; + break; + } /* If we get started via the /sbin/init symlink then we are called 'init'. After a subsequent reexecution we are then @@ -991,6 +1167,8 @@ int main(int argc, char *argv[]) { program_invocation_short_name = systemd; prctl(PR_SET_NAME, systemd); + saved_argv = argv; + saved_argc = argc; log_show_color(isatty(STDERR_FILENO) > 0); log_show_location(false); @@ -998,28 +1176,56 @@ int main(int argc, char *argv[]) { if (getpid() == 1) { arg_running_as = MANAGER_SYSTEM; - log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); + log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_SYSLOG_OR_KMSG); - /* This might actually not return, but cause a - * reexecution */ - if (selinux_setup(argv) < 0) - goto finish; + if (!is_reexec) + if (selinux_setup(&loaded_policy) < 0) + goto finish; + + log_open(); if (label_init() < 0) goto finish; + + if (!is_reexec) + if (hwclock_is_localtime() > 0) { + int min; + + r = hwclock_apply_localtime_delta(&min); + if (r < 0) + log_error("Failed to apply local time delta, ignoring: %s", strerror(-r)); + else + log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min); + } + } else { arg_running_as = MANAGER_USER; - log_set_target(LOG_TARGET_CONSOLE); + log_set_target(LOG_TARGET_AUTO); + log_open(); } + /* Initialize default unit */ if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0) goto finish; + /* By default, mount "cpu" and "cpuacct" together */ + arg_join_controllers = new(char**, 2); + if (!arg_join_controllers) + goto finish; + + arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL); + arg_join_controllers[1] = NULL; + + if (!arg_join_controllers[0]) + goto finish; + /* Mount /proc, /sys and friends, so that /proc/cmdline and * /proc/$PID/fd is available. */ - if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) - if (mount_setup() < 0) + if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) { + r = mount_setup(loaded_policy); + if (r < 0) goto finish; + } /* Reset all signal handlers. */ assert_se(reset_all_signal_handlers() == 0); @@ -1044,10 +1250,12 @@ int main(int argc, char *argv[]) { goto finish; } - /* If Plymouth is being run make sure we show the status, so - * that there's something nice to see when people press Esc */ - if (access("/dev/.systemd/plymouth", F_OK) >= 0) - arg_show_status = true; + if (arg_running_as == MANAGER_SYSTEM && + arg_action == ACTION_RUN && + running_in_chroot() > 0) { + log_error("Cannot be run in a chroot() environment."); + goto finish; + } if (arg_action == ACTION_HELP) { retval = help(); @@ -1063,6 +1271,9 @@ int main(int argc, char *argv[]) { assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST); + /* Close logging fds, in order not to confuse fdset below */ + log_close(); + /* Remember open file descriptors for later deserialization */ if (serialization) { if ((r = fdset_new_fill(&fds)) < 0) { @@ -1088,6 +1299,9 @@ int main(int argc, char *argv[]) { * kernel that don't really make sense for us. */ unsetenv("HOME"); unsetenv("TERM"); + + /* All other variables are left as is, so that clients + * can still read them via /proc/1/environ */ } /* Move out of the way, so that we won't block unmounts */ @@ -1107,7 +1321,7 @@ int main(int argc, char *argv[]) { /* Reset the console, but only if this is really init and we * are freshly booted */ if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) { - console_setup(getpid() == 1 && !serialization); + console_setup(getpid() == 1 && !is_reexec); make_null_stdio(); } @@ -1119,23 +1333,29 @@ int main(int argc, char *argv[]) { if (getpid() == 1) install_crash_handler(); + if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) { + r = mount_cgroup_controllers(arg_join_controllers); + if (r < 0) + goto finish; + } + log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG, PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as)); - if (arg_running_as == MANAGER_SYSTEM && !serialization) { + if (arg_running_as == MANAGER_SYSTEM && !is_reexec) { locale_setup(); - if (arg_show_status) + if (arg_show_status || plymouth_running()) status_welcome(); kmod_setup(); hostname_setup(); + machine_id_setup(); loopback_setup(); - mkdir_p("/dev/.systemd/ask-password/", 0755); - test_mtab(); test_usr(); + test_cgroups(); } if ((r = manager_new(arg_running_as, &m)) < 0) { @@ -1144,7 +1364,6 @@ int main(int argc, char *argv[]) { } m->confirm_spawn = arg_confirm_spawn; - m->show_status = arg_show_status; #ifdef HAVE_SYSV_COMPAT m->sysv_console = arg_sysv_console; #endif @@ -1159,6 +1378,10 @@ int main(int argc, char *argv[]) { if (arg_default_controllers) manager_set_default_controllers(m, arg_default_controllers); + manager_set_show_status(m, arg_show_status); + + before_startup = now(CLOCK_MONOTONIC); + if ((r = manager_startup(m, serialization, fds)) < 0) log_error("Failed to fully start up daemon: %s", strerror(-r)); @@ -1218,6 +1441,11 @@ int main(int argc, char *argv[]) { goto finish; } + after_startup = now(CLOCK_MONOTONIC); + log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG, + "Loaded units and determined initial transaction in %s.", + format_timespan(timespan, sizeof(timespan), after_startup - before_startup)); + if (arg_action == ACTION_TEST) { printf("-> By jobs:\n"); manager_dump_jobs(m, stdout, "\t"); @@ -1281,6 +1509,7 @@ finish: free(arg_default_unit); strv_free(arg_default_controllers); + free_join_controllers(); dbus_shutdown();