From: Sven Eden Date: Mon, 6 Feb 2017 06:28:54 +0000 (+0100) Subject: Add poweroff, suspend etc. loginctl commands X-Git-Tag: v226.4~1^2~33 X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=14dbe3476e6a5e03d928dc35f48577efea6baf57 Add poweroff, suspend etc. loginctl commands * src/login/loginctl.c: Add poweroff, reboot, suspend, hibernate, and hybrid-sleep commands. Normally these are handled by systemctl but since elogind is targeted at the no-systemd use case, we incorporate them here. --- diff --git a/src/basic/util.c b/src/basic/util.c index 38de72966..fcea9cead 100644 --- a/src/basic/util.c +++ b/src/basic/util.c @@ -2568,8 +2568,6 @@ int files_same(const char *filea, const char *fileb) { a.st_ino == b.st_ino; } -/// UNNEEDED by elogind -#if 0 int running_in_chroot(void) { int ret; @@ -2579,7 +2577,6 @@ int running_in_chroot(void) { return ret == 0; } -#endif // 0 static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) { size_t x; diff --git a/src/basic/util.h b/src/basic/util.h index 200f3befe..3cb40a83b 100644 --- a/src/basic/util.h +++ b/src/basic/util.h @@ -375,7 +375,7 @@ DEFINE_TRIVIAL_CLEANUP_FUNC(cpu_set_t*, CPU_FREE); int files_same(const char *filea, const char *fileb); -// UNNEEDED int running_in_chroot(void); +int running_in_chroot(void); char *ellipsize(const char *s, size_t length, unsigned percent); /* bytes columns */ diff --git a/src/login/loginctl.c b/src/login/loginctl.c index 6c12556d0..543f14063 100644 --- a/src/login/loginctl.c +++ b/src/login/loginctl.c @@ -45,6 +45,7 @@ #include "process-util.h" #include "terminal-util.h" #include "signal-util.h" +#include "logind-action.h" static char **arg_property = NULL; static bool arg_all = false; @@ -56,10 +57,22 @@ static int arg_signal = SIGTERM; static BusTransport arg_transport = BUS_TRANSPORT_LOCAL; static char *arg_host = NULL; static bool arg_ask_password = true; +static bool arg_ignore_inhibitors = false; #if 0 static unsigned arg_lines = 10; static OutputMode arg_output = OUTPUT_SHORT; #endif // 0 +static enum action { + _ACTION_INVALID, + ACTION_POWEROFF, + ACTION_REBOOT, + ACTION_SUSPEND, + ACTION_HIBERNATE, + ACTION_HYBRID_SLEEP, + ACTION_CANCEL_SHUTDOWN, + _ACTION_MAX +} arg_action; + static void pager_open_if_enabled(void) { @@ -1185,7 +1198,111 @@ static int terminate_seat(int argc, char *argv[], void *userdata) { return 0; } -static int check_inhibitors(sd_bus *bus, const char *verb, const char *inhibit_what) { +/* Ask elogind, which might grant access to unprivileged users + * through PolicyKit */ +static int reboot_with_logind(sd_bus *bus, enum action a) { + _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; + const char *method; + int r; + static const char *table[_ACTION_MAX] = { + [ACTION_REBOOT] = "The system is going down for reboot NOW!", + [ACTION_POWEROFF] = "The system is going down for power-off NOW!", + [ACTION_CANCEL_SHUTDOWN] = "The system shutdown has been cancelled NOW!" + }; + + if (!bus) + return -EIO; + + polkit_agent_open_if_enabled(); + + switch (a) { + + case ACTION_POWEROFF: + method = "PowerOff"; + break; + + case ACTION_REBOOT: + method = "Reboot"; + break; + + case ACTION_SUSPEND: + method = "Suspend"; + break; + + case ACTION_HIBERNATE: + method = "Hibernate"; + break; + + case ACTION_HYBRID_SLEEP: + method = "HybridSleep"; + break; + + case ACTION_CANCEL_SHUTDOWN: + method = "CancelScheduledShutdown"; + break; + + default: + return -EINVAL; + } + + if (table[a]) { + r = sd_bus_call_method( + bus, + "org.freedesktop.login1", + "/org/freedesktop/login1", + "org.freedesktop.login1.Manager", + "SetWallMessage", + &error, + NULL, + "sb", + table[a], + true); + + if (r < 0) { + log_warning_errno(r, "Failed to set wall message, ignoring: %s", + bus_error_message(&error, r)); + sd_bus_error_free(&error); + } + } + + + r = sd_bus_call_method( + bus, + "org.freedesktop.login1", + "/org/freedesktop/login1", + "org.freedesktop.login1.Manager", + method, + &error, + NULL, + "b", arg_ask_password); + if (r < 0) + log_error("Failed to execute operation: %s", bus_error_message(&error, r)); + + return r; +} + +static const struct { + HandleAction action; + const char* verb; +} action_table[_ACTION_MAX] = { + [ACTION_POWEROFF] = { HANDLE_POWEROFF, "poweroff", }, + [ACTION_REBOOT] = { HANDLE_REBOOT, "reboot", }, + [ACTION_SUSPEND] = { HANDLE_SUSPEND, "suspend", }, + [ACTION_HIBERNATE] = { HANDLE_HIBERNATE, "hibernate", }, + [ACTION_HYBRID_SLEEP] = { HANDLE_HYBRID_SLEEP, "hybrid-sleep" }, +}; + +static enum action verb_to_action(const char *verb) { + enum action i; + + for (i = _ACTION_INVALID; i < _ACTION_MAX; i++) + if (streq_ptr(action_table[i].verb, verb)) + return i; + + return _ACTION_INVALID; +} + +static int check_inhibitors(sd_bus *bus, enum action a) { _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; _cleanup_strv_free_ char **sessions = NULL; const char *what, *who, *why, *mode; @@ -1194,7 +1311,11 @@ static int check_inhibitors(sd_bus *bus, const char *verb, const char *inhibit_w char **s; int r; - assert(bus); + if (!bus) + return 0; + + if (arg_ignore_inhibitors) + return 0; if (geteuid() == 0) return 0; @@ -1230,14 +1351,19 @@ static int check_inhibitors(sd_bus *bus, const char *verb, const char *inhibit_w if (!sv) return log_oom(); - if (!strv_contains(sv, inhibit_what)) + if ((pid_t) pid < 0) + return log_error_errno(ERANGE, "Bad PID %"PRIu32": %m", pid); + + if (!strv_contains(sv, + a == ACTION_POWEROFF || + a == ACTION_REBOOT ? "shutdown" : "sleep")) continue; get_process_comm(pid, &comm); user = uid_to_name(uid); log_warning("Operation inhibited by \"%s\" (PID "PID_FMT" \"%s\", user %s), reason is \"%s\".", - who, pid, strna(comm), strna(user), why); + who, (pid_t) pid, strna(comm), strna(user), why); c++; } @@ -1274,154 +1400,50 @@ static int check_inhibitors(sd_bus *bus, const char *verb, const char *inhibit_w if (c <= 0) return 0; - log_error("Please retry operation after closing inhibitors and logging out other users.\nAlternatively, ignore inhibitors and users with 'loginctl %s -i'.", verb); + log_error("Please retry operation after closing inhibitors and logging out other users.\n" + "Alternatively, ignore inhibitors and users with 'loginctl %s -i'.", + action_table[a].verb); return -EPERM; } -static int poweroff(int argc, char *argv[], void *userdata) { - _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; - _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; +static int start_special(int argc, char *argv[], void *userdata) { sd_bus *bus = userdata; + enum action a; int r; - assert(bus); - - r = check_inhibitors(bus, "poweroff", "shutdown"); - if (r < 0) - return r; - - polkit_agent_open_if_enabled(); - - r = sd_bus_call_method( - bus, - "org.freedesktop.login1", - "/org/freedesktop/login1", - "org.freedesktop.login1.Manager", - "PowerOff", - &error, - NULL, - "b", arg_ask_password); - if (r < 0) - log_error("Failed to power off: %s", bus_error_message(&error, r)); - - return r; -} - -static int reboot(int argc, char *argv[], void *userdata) { - _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; - _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; - sd_bus *bus = userdata; - int r; - - assert(bus); - - r = check_inhibitors(bus, "reboot", "shutdown"); - if (r < 0) - return r; - - polkit_agent_open_if_enabled(); - - r = sd_bus_call_method( - bus, - "org.freedesktop.login1", - "/org/freedesktop/login1", - "org.freedesktop.login1.Manager", - "Reboot", - &error, - NULL, - "b", arg_ask_password); - if (r < 0) - log_error("Failed to reboot: %s", bus_error_message(&error, r)); - - return r; -} - -static int suspend(int argc, char *argv[], void *userdata) { - _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; - _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; - sd_bus *bus = userdata; - int r; - - assert(bus); - - r = check_inhibitors(bus, "suspend", "sleep"); - if (r < 0) - return r; - - polkit_agent_open_if_enabled(); - - r = sd_bus_call_method( - bus, - "org.freedesktop.login1", - "/org/freedesktop/login1", - "org.freedesktop.login1.Manager", - "Suspend", - &error, - NULL, - "b", arg_ask_password); - if (r < 0) - log_error("Failed to suspend: %s", bus_error_message(&error, r)); - - return r; -} - -static int hibernate(int argc, char *argv[], void *userdata) { - _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; - _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; - sd_bus *bus = userdata; - int r; - - assert(bus); - - r = check_inhibitors(bus, "hibernate", "sleep"); - if (r < 0) - return r; - - polkit_agent_open_if_enabled(); - - r = sd_bus_call_method( - bus, - "org.freedesktop.login1", - "/org/freedesktop/login1", - "org.freedesktop.login1.Manager", - "Hibernate", - &error, - NULL, - "b", arg_ask_password); - if (r < 0) - log_error("Failed to hibernate: %s", bus_error_message(&error, r)); - - return r; -} - -static int hybrid_sleep(int argc, char *argv[], void *userdata) { - _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; - _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; - sd_bus *bus = userdata; - int r; + assert(argv); - assert(bus); + a = verb_to_action(argv[0]); - r = check_inhibitors(bus, "hybrid-sleep", "sleep"); + r = check_inhibitors(bus, a); if (r < 0) return r; - polkit_agent_open_if_enabled(); - - r = sd_bus_call_method( - bus, - "org.freedesktop.login1", - "/org/freedesktop/login1", - "org.freedesktop.login1.Manager", - "HybridSleep", - &error, - NULL, - "b", arg_ask_password); - if (r < 0) - log_error("Failed to hybrid sleep: %s", bus_error_message(&error, r)); + /* Now power off actions in chroot environments */ + if ((a == ACTION_POWEROFF || + a == ACTION_REBOOT) && + (running_in_chroot() > 0) ) { + log_info("Running in chroot, ignoring request."); + return 0; + } - return r; + /* Switch to cancel shutdown, if a shutdown action was requested, + and the option to cancel it was set: */ + if ((a == ACTION_POWEROFF || + a == ACTION_REBOOT) && + (arg_action == ACTION_CANCEL_SHUTDOWN)) + return reboot_with_logind(bus, arg_action); + + /* Otherwise perform requested action */ + if (a == ACTION_POWEROFF || + a == ACTION_REBOOT || + a == ACTION_SUSPEND || + a == ACTION_HIBERNATE || + a == ACTION_HYBRID_SLEEP) + return reboot_with_logind(bus, a); + + return -EOPNOTSUPP; } static int help(int argc, char *argv[], void *userdata) { @@ -1445,6 +1467,8 @@ static int help(int argc, char *argv[], void *userdata) { " -o --output=STRING Change journal output mode (short, short-monotonic,\n" " verbose, export, json, json-pretty, json-sse, cat)\n\n" #endif // 0 + " -c Cancel a pending shutdown\n" + " -i --ignore-inhibitors When shutting down or sleeping, ignore inhibitors\n" "Session Commands:\n" " list-sessions List sessions\n" " session-status [ID...] Show session status\n" @@ -1509,6 +1533,7 @@ static int parse_argv(int argc, char *argv[]) { { "lines", required_argument, NULL, 'n' }, { "output", required_argument, NULL, 'o' }, #endif // + { "ignore-inhibitors", no_argument, NULL, 'i' }, {} }; @@ -1517,7 +1542,7 @@ static int parse_argv(int argc, char *argv[]) { assert(argc >= 0); assert(argv); - while ((c = getopt_long(argc, argv, "hp:als:H:M:", options, NULL)) >= 0) + while ((c = getopt_long(argc, argv, "hp:als:H:M:ci", options, NULL)) >= 0) switch (c) { @@ -1599,6 +1624,14 @@ static int parse_argv(int argc, char *argv[]) { arg_host = optarg; break; + case 'c': + arg_action = ACTION_CANCEL_SHUTDOWN; + break; + + case 'i': + arg_ignore_inhibitors = true; + break; + case '?': return -EINVAL; @@ -1636,11 +1669,12 @@ static int loginctl_main(int argc, char *argv[], sd_bus *bus) { { "attach", 3, VERB_ANY, 0, attach }, { "flush-devices", VERB_ANY, 1, 0, flush_devices }, { "terminate-seat", 2, VERB_ANY, 0, terminate_seat }, - { "poweroff", VERB_ANY, 1, 0, poweroff }, - { "reboot", VERB_ANY, 1, 0, reboot }, - { "suspend", VERB_ANY, 1, 0, suspend }, - { "hibernate", VERB_ANY, 1, 0, hibernate }, - { "hybrid-sleep", VERB_ANY, 1, 0, hybrid_sleep }, + { "poweroff", VERB_ANY, 1, 0, start_special }, + { "reboot", VERB_ANY, 1, 0, start_special }, + { "suspend", VERB_ANY, 1, 0, start_special }, + { "hibernate", VERB_ANY, 1, 0, start_special }, + { "hybrid-sleep", VERB_ANY, 1, 0, start_special }, + { "cancel-shutdown", VERB_ANY, 1, 0, start_special }, {} };