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1 : /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2 :
3 : /***
4 : This file is part of systemd.
5 :
6 : Copyright 2012 Lennart Poettering
7 :
8 : systemd is free software; you can redistribute it and/or modify it
9 : under the terms of the GNU Lesser General Public License as published by
10 : the Free Software Foundation; either version 2.1 of the License, or
11 : (at your option) any later version.
12 :
13 : systemd is distributed in the hope that it will be useful, but
14 : WITHOUT ANY WARRANTY; without even the implied warranty of
15 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 : Lesser General Public License for more details.
17 :
18 : You should have received a copy of the GNU Lesser General Public License
19 : along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 : ***/
21 :
22 : #include <unistd.h>
23 :
24 : #include "conf-parser.h"
25 : #include "special.h"
26 : #include "sleep-config.h"
27 : #include "bus-util.h"
28 : #include "bus-error.h"
29 : #include "logind-action.h"
30 : #include "formats-util.h"
31 : #include "process-util.h"
32 : #include "terminal-util.h"
33 :
34 0 : int manager_handle_action(
35 : Manager *m,
36 : InhibitWhat inhibit_key,
37 : HandleAction handle,
38 : bool ignore_inhibited,
39 : bool is_edge) {
40 :
41 : static const char * const message_table[_HANDLE_ACTION_MAX] = {
42 : [HANDLE_POWEROFF] = "Powering Off...",
43 : [HANDLE_REBOOT] = "Rebooting...",
44 : [HANDLE_HALT] = "Halting...",
45 : [HANDLE_KEXEC] = "Rebooting via kexec...",
46 : [HANDLE_SUSPEND] = "Suspending...",
47 : [HANDLE_HIBERNATE] = "Hibernating...",
48 : [HANDLE_HYBRID_SLEEP] = "Hibernating and suspending..."
49 : };
50 :
51 : static const char * const target_table[_HANDLE_ACTION_MAX] = {
52 : [HANDLE_POWEROFF] = SPECIAL_POWEROFF_TARGET,
53 : [HANDLE_REBOOT] = SPECIAL_REBOOT_TARGET,
54 : [HANDLE_HALT] = SPECIAL_HALT_TARGET,
55 : [HANDLE_KEXEC] = SPECIAL_KEXEC_TARGET,
56 : [HANDLE_SUSPEND] = SPECIAL_SUSPEND_TARGET,
57 : [HANDLE_HIBERNATE] = SPECIAL_HIBERNATE_TARGET,
58 : [HANDLE_HYBRID_SLEEP] = SPECIAL_HYBRID_SLEEP_TARGET
59 : };
60 :
61 0 : _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
62 : InhibitWhat inhibit_operation;
63 0 : Inhibitor *offending = NULL;
64 : bool supported;
65 : int r;
66 :
67 0 : assert(m);
68 :
69 : /* If the key handling is turned off, don't do anything */
70 0 : if (handle == HANDLE_IGNORE) {
71 0 : log_debug("Refusing operation, as it is turned off.");
72 0 : return 0;
73 : }
74 :
75 0 : if (inhibit_key == INHIBIT_HANDLE_LID_SWITCH) {
76 : /* If the last system suspend or startup is too close,
77 : * let's not suspend for now, to give USB docking
78 : * stations some time to settle so that we can
79 : * properly watch its displays. */
80 0 : if (m->lid_switch_ignore_event_source) {
81 0 : log_debug("Ignoring lid switch request, system startup or resume too close.");
82 0 : return 0;
83 : }
84 : }
85 :
86 : /* If the key handling is inhibited, don't do anything */
87 0 : if (inhibit_key > 0) {
88 0 : if (manager_is_inhibited(m, inhibit_key, INHIBIT_BLOCK, NULL, true, false, 0, NULL)) {
89 0 : log_debug("Refusing operation, %s is inhibited.", inhibit_what_to_string(inhibit_key));
90 0 : return 0;
91 : }
92 : }
93 :
94 : /* Locking is handled differently from the rest. */
95 0 : if (handle == HANDLE_LOCK) {
96 :
97 0 : if (!is_edge)
98 0 : return 0;
99 :
100 0 : log_info("Locking sessions...");
101 0 : session_send_lock_all(m, true);
102 0 : return 1;
103 : }
104 :
105 0 : if (handle == HANDLE_SUSPEND)
106 0 : supported = can_sleep("suspend") > 0;
107 0 : else if (handle == HANDLE_HIBERNATE)
108 0 : supported = can_sleep("hibernate") > 0;
109 0 : else if (handle == HANDLE_HYBRID_SLEEP)
110 0 : supported = can_sleep("hybrid-sleep") > 0;
111 0 : else if (handle == HANDLE_KEXEC)
112 0 : supported = access(KEXEC, X_OK) >= 0;
113 : else
114 0 : supported = true;
115 :
116 0 : if (!supported) {
117 0 : log_warning("Requested operation not supported, ignoring.");
118 0 : return -EOPNOTSUPP;
119 : }
120 :
121 0 : if (m->action_what) {
122 0 : log_debug("Action already in progress, ignoring.");
123 0 : return -EALREADY;
124 : }
125 :
126 0 : inhibit_operation = handle == HANDLE_SUSPEND || handle == HANDLE_HIBERNATE || handle == HANDLE_HYBRID_SLEEP ? INHIBIT_SLEEP : INHIBIT_SHUTDOWN;
127 :
128 : /* If the actual operation is inhibited, warn and fail */
129 0 : if (!ignore_inhibited &&
130 0 : manager_is_inhibited(m, inhibit_operation, INHIBIT_BLOCK, NULL, false, false, 0, &offending)) {
131 0 : _cleanup_free_ char *comm = NULL, *u = NULL;
132 :
133 0 : get_process_comm(offending->pid, &comm);
134 0 : u = uid_to_name(offending->uid);
135 :
136 : /* If this is just a recheck of the lid switch then don't warn about anything */
137 0 : if (!is_edge) {
138 0 : log_debug("Refusing operation, %s is inhibited by UID "UID_FMT"/%s, PID "PID_FMT"/%s.",
139 : inhibit_what_to_string(inhibit_operation),
140 : offending->uid, strna(u),
141 : offending->pid, strna(comm));
142 0 : return 0;
143 : }
144 :
145 0 : log_error("Refusing operation, %s is inhibited by UID "UID_FMT"/%s, PID "PID_FMT"/%s.",
146 : inhibit_what_to_string(inhibit_operation),
147 : offending->uid, strna(u),
148 : offending->pid, strna(comm));
149 :
150 0 : warn_melody();
151 0 : return -EPERM;
152 : }
153 :
154 0 : log_info("%s", message_table[handle]);
155 :
156 0 : r = bus_manager_shutdown_or_sleep_now_or_later(m, target_table[handle], inhibit_operation, &error);
157 0 : if (r < 0) {
158 0 : log_error("Failed to execute operation: %s", bus_error_message(&error, r));
159 0 : return r;
160 : }
161 :
162 0 : return 1;
163 : }
164 :
165 : static const char* const handle_action_table[_HANDLE_ACTION_MAX] = {
166 : [HANDLE_IGNORE] = "ignore",
167 : [HANDLE_POWEROFF] = "poweroff",
168 : [HANDLE_REBOOT] = "reboot",
169 : [HANDLE_HALT] = "halt",
170 : [HANDLE_KEXEC] = "kexec",
171 : [HANDLE_SUSPEND] = "suspend",
172 : [HANDLE_HIBERNATE] = "hibernate",
173 : [HANDLE_HYBRID_SLEEP] = "hybrid-sleep",
174 : [HANDLE_LOCK] = "lock"
175 : };
176 :
177 22 : DEFINE_STRING_TABLE_LOOKUP(handle_action, HandleAction);
178 0 : DEFINE_CONFIG_PARSE_ENUM(config_parse_handle_action, handle_action, HandleAction, "Failed to parse handle action setting");
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