cf0fbc49e6
Sort the includes accoding to the new coding style.
186 lines
5.3 KiB
C
186 lines
5.3 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2015 Daniel Mack
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <pwd.h>
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#include <string.h>
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#include <unistd.h>
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#include "sd-messages.h"
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#include "alloc-util.h"
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#include "audit-util.h"
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#include "bus-common-errors.h"
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#include "bus-error.h"
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#include "bus-util.h"
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#include "formats-util.h"
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#include "logind.h"
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#include "special.h"
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#include "strv.h"
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#include "unit-name.h"
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#include "user-util.h"
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#include "utmp-wtmp.h"
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_const_ static usec_t when_wall(usec_t n, usec_t elapse) {
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usec_t left;
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unsigned int i;
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static const int wall_timers[] = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
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25, 40, 55, 70, 100, 130, 150, 180,
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};
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/* If the time is already passed, then don't announce */
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if (n >= elapse)
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return 0;
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left = elapse - n;
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for (i = 1; i < ELEMENTSOF(wall_timers); i++)
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if (wall_timers[i] * USEC_PER_MINUTE >= left)
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return left - wall_timers[i-1] * USEC_PER_MINUTE;
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return left % USEC_PER_HOUR;
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}
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bool logind_wall_tty_filter(const char *tty, void *userdata) {
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Manager *m = userdata;
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assert(m);
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if (!startswith(tty, "/dev/"))
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return true;
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return !streq(tty + 5, m->scheduled_shutdown_tty);
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}
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static int warn_wall(Manager *m, usec_t n) {
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char date[FORMAT_TIMESTAMP_MAX] = {};
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_cleanup_free_ char *l = NULL;
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usec_t left;
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int r;
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assert(m);
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if (!m->enable_wall_messages)
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return 0;
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left = m->scheduled_shutdown_timeout > n;
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r = asprintf(&l, "%s%sThe system is going down for %s %s%s!",
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strempty(m->wall_message),
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isempty(m->wall_message) ? "" : "\n",
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m->scheduled_shutdown_type,
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left ? "at " : "NOW",
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left ? format_timestamp(date, sizeof(date), m->scheduled_shutdown_timeout) : "");
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if (r < 0) {
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log_oom();
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return 0;
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}
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utmp_wall(l, uid_to_name(m->scheduled_shutdown_uid),
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m->scheduled_shutdown_tty, logind_wall_tty_filter, m);
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return 1;
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}
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static int wall_message_timeout_handler(
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sd_event_source *s,
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uint64_t usec,
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void *userdata) {
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Manager *m = userdata;
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usec_t n, next;
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int r;
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assert(m);
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assert(s == m->wall_message_timeout_source);
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n = now(CLOCK_REALTIME);
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r = warn_wall(m, n);
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if (r == 0)
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return 0;
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next = when_wall(n, m->scheduled_shutdown_timeout);
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if (next > 0) {
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r = sd_event_source_set_time(s, n + next);
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if (r < 0)
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return log_error_errno(r, "sd_event_source_set_time() failed. %m");
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r = sd_event_source_set_enabled(s, SD_EVENT_ONESHOT);
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if (r < 0)
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return log_error_errno(r, "sd_event_source_set_enabled() failed. %m");
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}
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return 0;
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}
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int manager_setup_wall_message_timer(Manager *m) {
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usec_t n, elapse;
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int r;
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assert(m);
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n = now(CLOCK_REALTIME);
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elapse = m->scheduled_shutdown_timeout;
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/* wall message handling */
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if (isempty(m->scheduled_shutdown_type)) {
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warn_wall(m, n);
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return 0;
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}
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if (elapse < n)
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return 0;
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/* Warn immediately if less than 15 minutes are left */
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if (elapse - n < 15 * USEC_PER_MINUTE) {
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r = warn_wall(m, n);
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if (r == 0)
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return 0;
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}
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elapse = when_wall(n, elapse);
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if (elapse == 0)
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return 0;
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if (m->wall_message_timeout_source) {
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r = sd_event_source_set_time(m->wall_message_timeout_source, n + elapse);
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if (r < 0)
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return log_error_errno(r, "sd_event_source_set_time() failed. %m");
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r = sd_event_source_set_enabled(m->wall_message_timeout_source, SD_EVENT_ONESHOT);
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if (r < 0)
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return log_error_errno(r, "sd_event_source_set_enabled() failed. %m");
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} else {
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r = sd_event_add_time(m->event, &m->wall_message_timeout_source,
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CLOCK_REALTIME, n + elapse, 0, wall_message_timeout_handler, m);
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if (r < 0)
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return log_error_errno(r, "sd_event_add_time() failed. %m");
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}
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return 0;
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}
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