#include "virt.h"
#include "watchdog.h"
#include "path-util.h"
+#include "switch-root.h"
+#include "capability.h"
#include "mount-setup.h"
#include "loopback-setup.h"
static int arg_crash_chvt = -1;
static bool arg_confirm_spawn = false;
static bool arg_show_status = true;
+static bool arg_switched_root = false;
#ifdef HAVE_SYSV_COMPAT
static bool arg_sysv_console = true;
#endif
static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
static usec_t arg_runtime_watchdog = 0;
static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
+static struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {};
+static uint64_t arg_capability_bounding_set_drop = 0;
+static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
static FILE* serialization = NULL;
assert(u);
- if (!(c = strdup(u)))
+ c = strdup(u);
+ if (!c)
return -ENOMEM;
free(arg_default_unit);
arg_default_unit = c;
+
return 0;
}
assert(word);
- if (startswith(word, "systemd.unit="))
- return set_default_unit(word + 13);
+ if (startswith(word, "systemd.unit=")) {
+
+ if (!in_initrd())
+ return set_default_unit(word + 13);
+
+ } else if (startswith(word, "rd.systemd.unit=")) {
+
+ if (in_initrd())
+ return set_default_unit(word + 16);
- else if (startswith(word, "systemd.log_target=")) {
+ } else if (startswith(word, "systemd.log_target=")) {
if (log_set_target_from_string(word + 19) < 0)
log_warning("Failed to parse log target %s. Ignoring.", word + 19);
arg_sysv_console = r;
#endif
- } else if (startswith(word, "systemd.")) {
+ } else if (startswith(word, "systemd.") ||
+ (in_initrd() && startswith(word, "rd.systemd."))) {
log_warning("Unknown kernel switch %s. Ignoring.", word);
log_info("Supported kernel switches:\n"
"systemd.unit=UNIT Default unit to start\n"
+ "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
"systemd.dump_core=0|1 Dump core on crash\n"
"systemd.crash_shell=0|1 Run shell on crash\n"
"systemd.crash_chvt=N Change to VT #N on crash\n"
"systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
" Set default log output for services\n"
"systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
- " Set default log error output for services\n");
+ " Set default log error output for services\n"
+ "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
} else if (streq(word, "quiet")) {
arg_show_status = false;
#ifdef HAVE_SYSV_COMPAT
arg_sysv_console = false;
#endif
- } else {
+ } else if (!in_initrd()) {
unsigned i;
/* SysV compatibility */
{ "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
{ "Manager", "RuntimeWatchdogSec", config_parse_usec, 0, &arg_runtime_watchdog },
{ "Manager", "ShutdownWatchdogSec", config_parse_usec, 0, &arg_shutdown_watchdog },
+ { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
+ { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
+ { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
+ { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
+ { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
+ { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
+ { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
+ { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
+ { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
+ { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
+ { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
+ { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
+ { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
+ { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
+ { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
+ { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
+ { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
+ { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
{ NULL, NULL, NULL, 0, NULL }
};
ARG_SHOW_STATUS,
ARG_SYSV_CONSOLE,
ARG_DESERIALIZE,
- ARG_SWITCHEDROOT,
+ ARG_SWITCHED_ROOT,
ARG_INTROSPECT,
ARG_DEFAULT_STD_OUTPUT,
ARG_DEFAULT_STD_ERROR
{ "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE },
#endif
{ "deserialize", required_argument, NULL, ARG_DESERIALIZE },
- { "switchedroot", no_argument, NULL, ARG_SWITCHEDROOT },
+ { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
{ "introspect", optional_argument, NULL, ARG_INTROSPECT },
{ "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
{ "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
break;
}
- case ARG_SWITCHEDROOT:
- /* Nothing special yet */
+ case ARG_SWITCHED_ROOT:
+ arg_switched_root = true;
break;
case ARG_INTROSPECT: {
sleep(10);
}
-static int do_switch_root(const char *switch_root) {
- int r=0;
- /* Don't try to unmount the old "/", there's no way to do it. */
- const char *umounts[] = { "/dev", "/proc", "/sys", "/run", NULL };
- int i;
- int cfd = -1;
- struct stat switch_root_stat, sb;
-
- if (path_equal(switch_root, "/"))
- return 0;
-
- if (stat(switch_root, &switch_root_stat) != 0) {
- r = -errno;
- log_error("failed to stat directory %s", switch_root);
- goto fail;
- }
-
- for (i = 0; umounts[i] != NULL; i++) {
- char newmount[PATH_MAX];
-
- snprintf(newmount, sizeof(newmount), "%s%s", switch_root, umounts[i]);
-
- if ((stat(newmount, &sb) != 0) || (sb.st_dev != switch_root_stat.st_dev)) {
- /* mount point seems to be mounted already or stat failed */
- umount2(umounts[i], MNT_DETACH);
- continue;
- }
-
- if (mount(umounts[i], newmount, NULL, MS_MOVE, NULL) < 0) {
- log_error("failed to mount moving %s to %s",
- umounts[i], newmount);
- log_error("forcing unmount of %s", umounts[i]);
- umount2(umounts[i], MNT_FORCE);
- }
- }
-
- if (chdir(switch_root)) {
- r = -errno;
- log_error("failed to change directory to %s", switch_root);
- goto fail;
- }
-
- cfd = open("/", O_RDONLY);
-
- if (mount(switch_root, "/", NULL, MS_MOVE, NULL) < 0) {
- r = -errno;
- log_error("failed to mount moving %s to /", switch_root);
- goto fail;
- }
-
- if (chroot(".")) {
- r = -errno;
- log_error("failed to change root");
- goto fail;
- }
-
- if (cfd >= 0) {
- rm_rf_children(cfd, false, false);
- close(cfd);
- cfd=-1;
- }
-
- return 0;
-
-fail:
- if (cfd >= 0)
- close(cfd);
-
- log_error("Failed to switch root, ignoring: %s", strerror(-r));
-
- return r;
-}
-
int main(int argc, char *argv[]) {
Manager *m = NULL;
int r, retval = EXIT_FAILURE;
const char *shutdown_verb = NULL;
dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
static char systemd[] = "systemd";
- bool is_reexec = false;
+ bool skip_setup = false;
int j;
bool loaded_policy = false;
bool arm_reboot_watchdog = false;
- char *switch_root = NULL, *switch_root_init = NULL;
+ bool queue_default_job = false;
+ char *switch_root_dir = NULL, *switch_root_init = NULL;
#ifdef HAVE_SYSV_COMPAT
if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
/* 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;
+ skip_setup = true;
break;
}
- /* If we have switched root, do all the special things */
+ /* If we have switched root, do all the special setup
+ * things */
for (j = 1; j < argc; j++)
- if (streq(argv[j], "--switchedroot")) {
- is_reexec = false;
+ if (streq(argv[j], "--switched-root")) {
+ skip_setup = false;
break;
}
log_set_max_level(LOG_INFO);
if (getpid() == 1) {
+ if (in_initrd()) {
+ char *rd_timestamp = NULL;
+
+ dual_timestamp_get(&initrd_timestamp);
+ asprintf(&rd_timestamp, "%llu %llu",
+ (unsigned long long) initrd_timestamp.realtime,
+ (unsigned long long) initrd_timestamp.monotonic);
+ if (rd_timestamp) {
+ setenv("RD_TIMESTAMP", rd_timestamp, 1);
+ free(rd_timestamp);
+ }
+ }
+
arg_running_as = MANAGER_SYSTEM;
log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_JOURNAL : LOG_TARGET_JOURNAL_OR_KMSG);
- if (!is_reexec) {
+ if (!skip_setup) {
if (selinux_setup(&loaded_policy) < 0)
goto finish;
if (ima_setup() < 0)
if (label_init(NULL) < 0)
goto finish;
- if (!is_reexec)
+ if (!skip_setup)
if (hwclock_is_localtime() > 0) {
int min;
/* Parse the data passed to us. We leave this
* variables set, but the manager later on will not
* pass them on to our children. */
- parse_initrd_timestamp(&initrd_timestamp);
+ if (!in_initrd())
+ parse_initrd_timestamp(&initrd_timestamp);
/* Unset some environment variables passed in from the
* kernel that don't really make sense for us. */
unsetenv("SHLVL");
unsetenv("_");
- /* When we are invoked by a tool chroot-like such as
+ /* When we are invoked by a chroot-like tool such as
* nspawn, these might be set, but make little sense
* to pass on */
unsetenv("USER");
/* 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 && !is_reexec);
+ console_setup(getpid() == 1 && !skip_setup);
make_null_stdio();
}
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 && !is_reexec) {
+ if (arg_running_as == MANAGER_SYSTEM && !skip_setup) {
locale_setup();
if (arg_show_status || plymouth_running())
if (arg_running_as == MANAGER_SYSTEM && arg_runtime_watchdog > 0)
watchdog_set_timeout(&arg_runtime_watchdog);
+ if (arg_timer_slack_nsec != (nsec_t) -1)
+ if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
+ log_error("Failed to adjust timer slack: %m");
+
+ if (arg_capability_bounding_set_drop) {
+ r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
+ if (r < 0) {
+ log_error("Failed to drop capability bounding set: %s", strerror(-r));
+ goto finish;
+ }
+ r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
+ if (r < 0) {
+ log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
+ goto finish;
+ }
+ }
+
r = manager_new(arg_running_as, &m);
if (r < 0) {
log_error("Failed to allocate manager object: %s", strerror(-r));
m->runtime_watchdog = arg_runtime_watchdog;
m->shutdown_watchdog = arg_shutdown_watchdog;
+ manager_set_default_rlimits(m, arg_default_rlimit);
+
if (dual_timestamp_is_set(&initrd_timestamp))
m->initrd_timestamp = initrd_timestamp;
manager_set_show_status(m, arg_show_status);
+ /* Remember whether we should queue the default job */
+ queue_default_job = !serialization || arg_switched_root;
+
before_startup = now(CLOCK_MONOTONIC);
r = manager_startup(m, serialization, fds);
if (r < 0)
log_error("Failed to fully start up daemon: %s", strerror(-r));
+ /* This will close all file descriptors that were opened, but
+ * not claimed by any unit. */
if (fds) {
- /* This will close all file descriptors that were opened, but
- * not claimed by any unit. */
-
fdset_free(fds);
fds = NULL;
}
if (serialization) {
fclose(serialization);
serialization = NULL;
- } else {
+ }
+
+ if (queue_default_job) {
DBusError error;
Unit *target = NULL;
Job *default_unit_job;
case MANAGER_SWITCH_ROOT:
/* Steal the switch root parameters */
- switch_root = m->switch_root;
+ switch_root_dir = m->switch_root;
switch_root_init = m->switch_root_init;
m->switch_root = m->switch_root_init = NULL;
if (m)
manager_free(m);
+ for (j = 0; j < RLIMIT_NLIMITS; j++)
+ free (arg_default_rlimit[j]);
+
free(arg_default_unit);
strv_free(arg_default_controllers);
free_join_controllers();
* rebooted while we do that */
watchdog_close(true);
- if (switch_root)
- do_switch_root(switch_root);
+ if (switch_root_dir) {
+ r = switch_root(switch_root_dir);
+ if (r < 0)
+ log_error("Failed to switch root, ignoring: %s", strerror(-r));
+ }
args_size = MAX(6, argc+1);
args = newa(const char*, args_size);
i = 0;
args[i++] = SYSTEMD_BINARY_PATH;
- if (switch_root)
- args[i++] = "--switchedroot";
+ if (switch_root_dir)
+ args[i++] = "--switched-root";
args[i++] = arg_running_as == MANAGER_SYSTEM ? "--system" : "--user";
args[i++] = "--deserialize";
args[i++] = sfd;
args[0] = "/sbin/init";
execv(args[0], (char* const*) args);
- log_warning("Failed to execute /sbin/init, trying fallback: %m");
+ if (errno == ENOENT) {
+ log_warning("No /sbin/init, trying fallback");
- args[0] = "/bin/sh";
- args[1] = NULL;
- execv(args[0], (char* const*) args);
- log_error("Failed to execute /bin/sh, giving up: %m");
+ args[0] = "/bin/sh";
+ args[1] = NULL;
+ execv(args[0], (char* const*) args);
+ log_error("Failed to execute /bin/sh, giving up: %m");
+ } else
+ log_warning("Failed to execute /sbin/init, giving up: %m");
}
if (serialization)
~ianmdlvl / elogind.git / blobdiff