/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2012 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see .
***/
#include
#include "sd-messages.h"
#include "util.h"
#include "strv.h"
#include "fileio.h"
#include "conf-parser.h"
// #include "special.h"
#include "sleep-config.h"
#include "bus-error.h"
#include "bus-util.h"
#include "logind-action.h"
// #include "formats-util.h"
#include "process-util.h"
#include "terminal-util.h"
int manager_handle_action(
Manager *m,
InhibitWhat inhibit_key,
HandleAction handle,
bool ignore_inhibited,
bool is_edge) {
static const char * const message_table[_HANDLE_ACTION_MAX] = {
[HANDLE_POWEROFF] = "Powering Off...",
[HANDLE_REBOOT] = "Rebooting...",
[HANDLE_HALT] = "Halting...",
[HANDLE_KEXEC] = "Rebooting via kexec...",
[HANDLE_SUSPEND] = "Suspending...",
[HANDLE_HIBERNATE] = "Hibernating...",
[HANDLE_HYBRID_SLEEP] = "Hibernating and suspending..."
};
/// elogind does this itself. No target table required
#if 0
static const char * const target_table[_HANDLE_ACTION_MAX] = {
[HANDLE_POWEROFF] = SPECIAL_POWEROFF_TARGET,
[HANDLE_REBOOT] = SPECIAL_REBOOT_TARGET,
[HANDLE_HALT] = SPECIAL_HALT_TARGET,
[HANDLE_KEXEC] = SPECIAL_KEXEC_TARGET,
[HANDLE_SUSPEND] = SPECIAL_SUSPEND_TARGET,
[HANDLE_HIBERNATE] = SPECIAL_HIBERNATE_TARGET,
[HANDLE_HYBRID_SLEEP] = SPECIAL_HYBRID_SLEEP_TARGET
};
#endif // 0
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
InhibitWhat inhibit_operation;
Inhibitor *offending = NULL;
bool supported;
int r;
assert(m);
/* If the key handling is turned off, don't do anything */
if (handle == HANDLE_IGNORE) {
log_debug("Refusing operation, as it is turned off.");
return 0;
}
if (inhibit_key == INHIBIT_HANDLE_LID_SWITCH) {
/* If the last system suspend or startup is too close,
* let's not suspend for now, to give USB docking
* stations some time to settle so that we can
* properly watch its displays. */
if (m->lid_switch_ignore_event_source) {
log_debug("Ignoring lid switch request, system startup or resume too close.");
return 0;
}
}
/* If the key handling is inhibited, don't do anything */
if (inhibit_key > 0) {
if (manager_is_inhibited(m, inhibit_key, INHIBIT_BLOCK, NULL, true, false, 0, NULL)) {
log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_key));
return 0;
}
}
/* Locking is handled differently from the rest. */
if (handle == HANDLE_LOCK) {
if (!is_edge)
return 0;
log_info("Locking sessions...");
session_send_lock_all(m, true);
return 1;
}
if (handle == HANDLE_SUSPEND)
supported = can_sleep("suspend") > 0;
else if (handle == HANDLE_HIBERNATE)
supported = can_sleep("hibernate") > 0;
else if (handle == HANDLE_HYBRID_SLEEP)
supported = can_sleep("hybrid-sleep") > 0;
else if (handle == HANDLE_KEXEC)
supported = access(KEXEC, X_OK) >= 0;
else
supported = true;
if (!supported) {
log_warning("Requested operation not supported, ignoring.");
return -EOPNOTSUPP;
}
if (m->action_what) {
log_debug("Action already in progress, ignoring.");
return -EALREADY;
}
inhibit_operation = handle == HANDLE_SUSPEND || handle == HANDLE_HIBERNATE || handle == HANDLE_HYBRID_SLEEP ? INHIBIT_SLEEP : INHIBIT_SHUTDOWN;
/* If the actual operation is inhibited, warn and fail */
if (!ignore_inhibited &&
manager_is_inhibited(m, inhibit_operation, INHIBIT_BLOCK, NULL, false, false, 0, &offending)) {
_cleanup_free_ char *comm = NULL, *u = NULL;
get_process_comm(offending->pid, &comm);
u = uid_to_name(offending->uid);
/* If this is just a recheck of the lid switch then don't warn about anything */
if (!is_edge) {
log_debug("Refusing operation, %s is inhibited by UID "UID_FMT"/%s, PID "PID_FMT"/%s.",
inhibit_what_to_string(inhibit_operation),
offending->uid, strna(u),
offending->pid, strna(comm));
return 0;
}
log_error("Refusing operation, %s is inhibited by UID "UID_FMT"/%s, PID "PID_FMT"/%s.",
inhibit_what_to_string(inhibit_operation),
offending->uid, strna(u),
offending->pid, strna(comm));
return -EPERM;
}
log_info("%s", message_table[handle]);
/// elogind uses its own variant, which can use the handle directly.
#if 0
r = bus_manager_shutdown_or_sleep_now_or_later(m, target_table[handle], inhibit_operation, &error);
#else
r = bus_manager_shutdown_or_sleep_now_or_later(m, handle, inhibit_operation, &error);
#endif // 0
if (r < 0) {
log_error("Failed to execute operation: %s", bus_error_message(&error, r));
return r;
}
return 1;
}
static int run_helper(const char *helper) {
int pid = fork();
if (pid < 0) {
return log_error_errno(errno, "Failed to fork: %m");
}
if (pid == 0) {
/* Child */
close_all_fds(NULL, 0);
execlp(helper, helper, NULL);
log_error_errno(errno, "Failed to execute %s: %m", helper);
_exit(EXIT_FAILURE);
}
return wait_for_terminate_and_warn(helper, pid, true);
}
static int write_mode(char **modes) {
int r = 0;
char **mode;
STRV_FOREACH(mode, modes) {
int k;
k = write_string_file("/sys/power/disk", *mode, 0);
if (k == 0)
return 0;
log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m",
*mode);
if (r == 0)
r = k;
}
if (r < 0)
log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");
return r;
}
static int write_state(FILE **f, char **states) {
char **state;
int r = 0;
STRV_FOREACH(state, states) {
int k;
k = write_string_stream(*f, *state, true);
if (k == 0)
return 0;
log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m",
*state);
if (r == 0)
r = k;
fclose(*f);
*f = fopen("/sys/power/state", "we");
if (!*f)
return log_error_errno(errno, "Failed to open /sys/power/state: %m");
}
return r;
}
static int do_sleep(const char *arg_verb, char **modes, char **states) {
char *arguments[] = {
NULL,
(char*) "pre",
(char*) arg_verb,
NULL
};
static const char* const dirs[] = {SYSTEM_SLEEP_PATH, NULL};
int r;
_cleanup_fclose_ FILE *f = NULL;
/* This file is opened first, so that if we hit an error,
* we can abort before modifying any state. */
f = fopen("/sys/power/state", "we");
if (!f)
return log_error_errno(errno, "Failed to open /sys/power/state: %m");
/* Configure the hibernation mode */
r = write_mode(modes);
if (r < 0)
return r;
execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
log_struct(LOG_INFO,
LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_START),
LOG_MESSAGE("Suspending system..."),
"SLEEP=%s", arg_verb,
NULL);
r = write_state(&f, states);
if (r < 0)
return r;
log_struct(LOG_INFO,
LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_STOP),
LOG_MESSAGE("System resumed."),
"SLEEP=%s", arg_verb,
NULL);
arguments[1] = (char*) "post";
execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments);
return r;
}
int shutdown_or_sleep(Manager *m, HandleAction action) {
assert(m);
switch (action) {
case HANDLE_POWEROFF:
return run_helper(HALT);
case HANDLE_REBOOT:
return run_helper(REBOOT);
case HANDLE_HALT:
return run_helper(HALT);
case HANDLE_KEXEC:
return run_helper(KEXEC);
case HANDLE_SUSPEND:
return do_sleep("suspend", m->suspend_mode, m->suspend_state);
case HANDLE_HIBERNATE:
return do_sleep("hibernate", m->hibernate_mode, m->hibernate_state);
case HANDLE_HYBRID_SLEEP:
return do_sleep("hybrid-sleep", m->hybrid_sleep_mode, m->hybrid_sleep_state);
default:
return -EINVAL;
}
}
static const char* const handle_action_table[_HANDLE_ACTION_MAX] = {
[HANDLE_IGNORE] = "ignore",
[HANDLE_POWEROFF] = "poweroff",
[HANDLE_REBOOT] = "reboot",
[HANDLE_HALT] = "halt",
[HANDLE_KEXEC] = "kexec",
[HANDLE_SUSPEND] = "suspend",
[HANDLE_HIBERNATE] = "hibernate",
[HANDLE_HYBRID_SLEEP] = "hybrid-sleep",
[HANDLE_LOCK] = "lock"
};
DEFINE_STRING_TABLE_LOOKUP(handle_action, HandleAction);
DEFINE_CONFIG_PARSE_ENUM(config_parse_handle_action, handle_action, HandleAction, "Failed to parse handle action setting");