From 55944e5e40b1be2afc4855d8d2baf4b73d1876b5 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 22:49:52 +0200 Subject: Adding upstream version 255.4. Signed-off-by: Daniel Baumann --- src/login/logind-wall.c | 166 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 src/login/logind-wall.c (limited to 'src/login/logind-wall.c') diff --git a/src/login/logind-wall.c b/src/login/logind-wall.c new file mode 100644 index 0000000..97b74e9 --- /dev/null +++ b/src/login/logind-wall.c @@ -0,0 +1,166 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include +#include + +#include "sd-messages.h" + +#include "alloc-util.h" +#include "audit-util.h" +#include "bus-common-errors.h" +#include "bus-error.h" +#include "bus-util.h" +#include "event-util.h" +#include "format-util.h" +#include "logind.h" +#include "path-util.h" +#include "special.h" +#include "strv.h" +#include "unit-name.h" +#include "user-util.h" +#include "wall.h" + +static usec_t when_wall(usec_t n, usec_t elapse) { + static const int wall_timers[] = { + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, + 25, 40, 55, 70, 100, 130, 150, 180, + }; + + /* If the time is already passed, then don't announce */ + if (n >= elapse) + return 0; + + usec_t left = elapse - n; + + for (unsigned i = 1; i < ELEMENTSOF(wall_timers); i++) + if (wall_timers[i] * USEC_PER_MINUTE >= left) + return left - wall_timers[i-1] * USEC_PER_MINUTE; + + return left % USEC_PER_HOUR; +} + +bool logind_wall_tty_filter(const char *tty, bool is_local, void *userdata) { + Manager *m = ASSERT_PTR(userdata); + + assert(m->scheduled_shutdown_action); + + const char *p = path_startswith(tty, "/dev/"); + if (!p) + return true; + + /* Do not send information about events which do not destroy local sessions to local terminals. We + * can assume that if the system enters sleep or hibernation, this will be visible in an obvious way + * for any local user. And once the systems exits sleep or hibernation, the notification would be + * just noise, in particular for auto-suspend. */ + if (is_local && HANDLE_ACTION_IS_SLEEP(m->scheduled_shutdown_action->handle)) + return false; + + return !streq_ptr(p, m->scheduled_shutdown_tty); +} + +static int warn_wall(Manager *m, usec_t n) { + assert(m); + + if (!m->scheduled_shutdown_action) + return 0; + + bool left = m->scheduled_shutdown_timeout > n; + + _cleanup_free_ char *l = NULL; + if (asprintf(&l, "%s%sThe system will %s %s%s!", + strempty(m->wall_message), + isempty(m->wall_message) ? "" : "\n", + handle_action_verb_to_string(m->scheduled_shutdown_action->handle), + left ? "at " : "now", + left ? FORMAT_TIMESTAMP(m->scheduled_shutdown_timeout) : "") < 0) { + + log_oom(); + return 1; /* We're out-of-memory for now, but let's try to print the message later */ + } + + _cleanup_free_ char *username = uid_to_name(m->scheduled_shutdown_uid); + + int level = left ? LOG_INFO : LOG_NOTICE; + + log_struct(level, + LOG_MESSAGE("%s", l), + "ACTION=%s", handle_action_to_string(m->scheduled_shutdown_action->handle), + "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_SCHEDULED_STR, + username ? "OPERATOR=%s" : NULL, username); + + if (m->enable_wall_messages) + (void) wall(l, username, m->scheduled_shutdown_tty, logind_wall_tty_filter, m); + + return 1; +} + +static int wall_message_timeout_handler( + sd_event_source *s, + uint64_t usec, + void *userdata) { + + Manager *m = ASSERT_PTR(userdata); + int r; + + assert(s == m->wall_message_timeout_source); + + usec_t n = now(CLOCK_REALTIME); + + r = warn_wall(m, n); + if (r == 0) + return 0; + + usec_t next = when_wall(n, m->scheduled_shutdown_timeout); + if (next > 0) { + r = sd_event_source_set_time(s, n + next); + if (r < 0) + return log_error_errno(r, "sd_event_source_set_time() failed. %m"); + + r = sd_event_source_set_enabled(s, SD_EVENT_ONESHOT); + if (r < 0) + return log_error_errno(r, "sd_event_source_set_enabled() failed. %m"); + } + + return 0; +} + +int manager_setup_wall_message_timer(Manager *m) { + int r; + + assert(m); + + usec_t n = now(CLOCK_REALTIME); + usec_t elapse = m->scheduled_shutdown_timeout; + + /* wall message handling */ + + if (!m->scheduled_shutdown_action) + return 0; + + if (elapse > 0 && elapse < n) + return 0; + + /* Warn immediately if less than 15 minutes are left */ + if (elapse == 0 || elapse - n < 15 * USEC_PER_MINUTE) { + r = warn_wall(m, n); + if (r == 0) + return 0; + } + + elapse = when_wall(n, elapse); + if (elapse == 0) + return 0; + + r = event_reset_time(m->event, &m->wall_message_timeout_source, + CLOCK_REALTIME, + n + elapse, 0, + wall_message_timeout_handler, m, + 0, "wall-message-timer", true); + + if (r < 0) { + m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source); + return log_error_errno(r, "Failed to set up wall message timer: %m"); + } + + return 0; +} -- cgit v1.2.3