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60918275 LP |
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
2 | ||
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 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 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
ea430986 LP |
22 | #include <dbus/dbus.h> |
23 | ||
60918275 LP |
24 | #include <stdio.h> |
25 | #include <errno.h> | |
26 | #include <string.h> | |
16354eff | 27 | #include <unistd.h> |
4ade7963 LP |
28 | #include <sys/types.h> |
29 | #include <sys/stat.h> | |
f170852a | 30 | #include <getopt.h> |
60918275 LP |
31 | |
32 | #include "manager.h" | |
16354eff | 33 | #include "log.h" |
4ade7963 | 34 | #include "mount-setup.h" |
60918275 | 35 | |
f170852a LP |
36 | static enum { |
37 | ACTION_RUN, | |
38 | ACTION_HELP | |
39 | } action = ACTION_RUN; | |
40 | ||
41 | static char *default_unit = NULL; | |
42 | ||
43 | static int set_default_unit(const char *u) { | |
44 | char *c; | |
45 | ||
46 | assert(u); | |
47 | ||
48 | if (!(c = strdup(u))) | |
49 | return -ENOMEM; | |
50 | ||
51 | free(default_unit); | |
52 | default_unit = c; | |
53 | return 0; | |
54 | } | |
55 | ||
56 | static int parse_proc_cmdline_word(const char *word) { | |
57 | ||
58 | static const char * const rlmap[] = { | |
59 | "single", SPECIAL_RUNLEVEL1_TARGET, | |
60 | "-s", SPECIAL_RUNLEVEL1_TARGET, | |
61 | "s", SPECIAL_RUNLEVEL1_TARGET, | |
62 | "S", SPECIAL_RUNLEVEL1_TARGET, | |
63 | "1", SPECIAL_RUNLEVEL1_TARGET, | |
64 | "2", SPECIAL_RUNLEVEL2_TARGET, | |
65 | "3", SPECIAL_RUNLEVEL3_TARGET, | |
66 | "4", SPECIAL_RUNLEVEL4_TARGET, | |
67 | "5", SPECIAL_RUNLEVEL5_TARGET | |
68 | }; | |
69 | ||
70 | if (startswith(word, "systemd.default=")) | |
71 | return set_default_unit(word + 15); | |
72 | ||
73 | else if (startswith(word, "systemd.log_target=")) { | |
74 | ||
75 | if (log_set_target_from_string(word + 19) < 0) | |
76 | log_warning("Failed to parse log target %s. Ignoring.", word + 19); | |
77 | ||
78 | } else if (startswith(word, "systemd.log_level=")) { | |
79 | ||
80 | if (log_set_max_level_from_string(word + 18) < 0) | |
81 | log_warning("Failed to parse log level %s. Ignoring.", word + 18); | |
82 | ||
83 | } else { | |
84 | unsigned i; | |
85 | ||
86 | /* SysV compatibility */ | |
87 | ||
88 | for (i = 0; i < ELEMENTSOF(rlmap); i += 2) | |
89 | if (streq(word, rlmap[i])) | |
90 | return set_default_unit(rlmap[i+1]); | |
91 | } | |
92 | ||
93 | return 0; | |
94 | } | |
95 | ||
96 | static int parse_proc_cmdline(void) { | |
97 | char *line; | |
98 | int r; | |
99 | char *w; | |
100 | size_t l; | |
101 | char *state; | |
102 | ||
103 | if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) { | |
104 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(errno)); | |
105 | return 0; | |
106 | } | |
107 | ||
108 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
109 | char *word; | |
110 | ||
111 | if (!(word = strndup(w, l))) { | |
112 | r = -ENOMEM; | |
113 | goto finish; | |
114 | } | |
115 | ||
116 | r = parse_proc_cmdline_word(word); | |
117 | free(word); | |
118 | ||
119 | if (r < 0) | |
120 | goto finish; | |
121 | } | |
122 | ||
123 | r = 0; | |
124 | ||
125 | finish: | |
126 | free(line); | |
127 | return r; | |
128 | } | |
129 | ||
130 | static int parse_argv(int argc, char *argv[]) { | |
131 | ||
132 | enum { | |
133 | ARG_LOG_LEVEL = 0x100, | |
134 | ARG_LOG_TARGET, | |
135 | ARG_DEFAULT | |
136 | }; | |
137 | ||
138 | static const struct option options[] = { | |
139 | { "log-level", required_argument, NULL, ARG_LOG_LEVEL }, | |
140 | { "log-target", required_argument, NULL, ARG_LOG_TARGET }, | |
141 | { "default", required_argument, NULL, ARG_DEFAULT }, | |
142 | { "help", no_argument, NULL, 'h' }, | |
143 | { NULL, 0, NULL, 0 } | |
144 | }; | |
145 | ||
146 | int c, r; | |
147 | ||
148 | assert(argc >= 1); | |
149 | assert(argv); | |
150 | ||
151 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
152 | ||
153 | switch (c) { | |
154 | ||
155 | case ARG_LOG_LEVEL: | |
156 | if ((r = log_set_max_level_from_string(optarg)) < 0) { | |
157 | log_error("Failed to parse log level %s.", optarg); | |
158 | return r; | |
159 | } | |
160 | ||
161 | break; | |
162 | ||
163 | case ARG_LOG_TARGET: | |
164 | ||
165 | if ((r = log_set_target_from_string(optarg)) < 0) { | |
166 | log_error("Failed to parse log target %s.", optarg); | |
167 | return r; | |
168 | } | |
169 | ||
170 | break; | |
171 | ||
172 | case ARG_DEFAULT: | |
173 | ||
174 | if ((r = set_default_unit(optarg)) < 0) { | |
175 | log_error("Failed to set default unit %s: %s", optarg, strerror(-r)); | |
176 | return r; | |
177 | } | |
178 | ||
179 | break; | |
180 | ||
181 | case 'h': | |
182 | action = ACTION_HELP; | |
183 | break; | |
184 | ||
185 | case '?': | |
186 | return -EINVAL; | |
187 | ||
188 | default: | |
189 | log_error("Unknown option code %c", c); | |
190 | return -EINVAL; | |
191 | } | |
192 | ||
193 | if (optind < argc) { | |
194 | log_error("Too many arguments."); | |
195 | return -EINVAL; | |
196 | } | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | static int help(void) { | |
202 | ||
203 | printf("%s [options]\n\n" | |
204 | " -h --help Show this help\n" | |
205 | " --default=UNIT Set default unit\n" | |
206 | " --log-level=LEVEL Set log level\n" | |
207 | " --log-target=TARGET Set log target (console, syslog, kmsg)\n", | |
208 | __progname); | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
60918275 LP |
213 | int main(int argc, char *argv[]) { |
214 | Manager *m = NULL; | |
87f0e418 | 215 | Unit *target = NULL; |
60918275 LP |
216 | Job *job = NULL; |
217 | int r, retval = 1; | |
27b14a22 | 218 | |
f170852a LP |
219 | if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0) |
220 | goto finish; | |
60918275 | 221 | |
f170852a LP |
222 | /* Mount /proc, /sys and friends, so that /proc/cmdline and |
223 | * /proc/$PID/fd is available. */ | |
224 | mount_setup(); | |
4ade7963 LP |
225 | |
226 | /* Reset all signal handlers. */ | |
227 | assert_se(reset_all_signal_handlers() == 0); | |
228 | ||
f170852a LP |
229 | /* Close all open files */ |
230 | assert_se(close_all_fds(NULL, 0) == 0); | |
231 | ||
232 | if (parse_proc_cmdline() < 0) | |
233 | goto finish; | |
234 | ||
235 | log_parse_environment(); | |
236 | ||
237 | if (parse_argv(argc, argv) < 0) | |
238 | goto finish; | |
239 | ||
240 | if (action == ACTION_HELP) { | |
241 | retval = help(); | |
242 | goto finish; | |
243 | } | |
244 | ||
245 | assert_se(action == ACTION_RUN); | |
246 | ||
247 | /* Move out of the way, so that we won't block unmounts */ | |
248 | assert_se(chdir("/") == 0); | |
249 | ||
4ade7963 LP |
250 | /* Become a session leader if we aren't one yet. */ |
251 | setsid(); | |
252 | ||
253 | /* Disable the umask logic */ | |
254 | umask(0); | |
255 | ||
256 | /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */ | |
257 | dbus_connection_set_change_sigpipe(FALSE); | |
258 | ||
4ade7963 LP |
259 | /* Open the logging devices, if possible and necessary*/ |
260 | log_open_syslog(); | |
261 | log_open_kmsg(); | |
262 | ||
8e274523 LP |
263 | if ((r = manager_new(&m)) < 0) { |
264 | log_error("Failed to allocate manager object: %s", strerror(-r)); | |
60918275 LP |
265 | goto finish; |
266 | } | |
267 | ||
f50e0a01 LP |
268 | if ((r = manager_coldplug(m)) < 0) { |
269 | log_error("Failed to retrieve coldplug information: %s", strerror(-r)); | |
270 | goto finish; | |
271 | } | |
272 | ||
27b14a22 LP |
273 | log_debug("Activating default unit: %s", default_unit); |
274 | ||
275 | if ((r = manager_load_unit(m, default_unit, &target)) < 0) { | |
c22cbe26 | 276 | log_error("Failed to load default target: %s", strerror(-r)); |
60918275 LP |
277 | goto finish; |
278 | } | |
279 | ||
d46de8a1 LP |
280 | printf("→ By units:\n"); |
281 | manager_dump_units(m, stdout, "\t"); | |
282 | ||
8f5847c4 LP |
283 | if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &job)) < 0) { |
284 | log_error("Failed to start default target: %s", strerror(-r)); | |
285 | goto finish; | |
286 | } | |
11dd41ce | 287 | |
44d8db9e | 288 | printf("→ By jobs:\n"); |
cea8e32e LP |
289 | manager_dump_jobs(m, stdout, "\t"); |
290 | ||
c20cae32 LP |
291 | if ((r = manager_loop(m)) < 0) { |
292 | log_error("Failed to run mainloop: %s", strerror(-r)); | |
293 | goto finish; | |
294 | } | |
9152c765 | 295 | |
60918275 LP |
296 | retval = 0; |
297 | ||
f170852a LP |
298 | log_debug("Exit."); |
299 | ||
60918275 LP |
300 | finish: |
301 | if (m) | |
302 | manager_free(m); | |
303 | ||
f170852a | 304 | free(default_unit); |
b9cd2ec1 | 305 | |
ea430986 LP |
306 | dbus_shutdown(); |
307 | ||
60918275 LP |
308 | return retval; |
309 | } |