| 1 | /* vi: set sw=4 ts=4: */
|
|---|
| 2 | /*
|
|---|
| 3 | * simple ACPI events listener
|
|---|
| 4 | *
|
|---|
| 5 | * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
|
|---|
| 6 | *
|
|---|
| 7 | * Licensed under GPLv2, see file LICENSE in this source tree.
|
|---|
| 8 | */
|
|---|
| 9 |
|
|---|
| 10 | //usage:#define acpid_trivial_usage
|
|---|
| 11 | //usage: "[-df] [-c CONFDIR] [-l LOGFILE] [-a ACTIONFILE] [-M MAPFILE] [-e PROC_EVENT_FILE] [-p PIDFILE]"
|
|---|
| 12 | //usage:#define acpid_full_usage "\n\n"
|
|---|
| 13 | //usage: "Listen to ACPI events and spawn specific helpers on event arrival\n"
|
|---|
| 14 | //usage: "\n -d Log to stderr, not log file (implies -f)"
|
|---|
| 15 | //usage: "\n -f Run in foreground"
|
|---|
| 16 | //usage: "\n -c DIR Config directory [/etc/acpi]"
|
|---|
| 17 | //usage: "\n -e FILE /proc event file [/proc/acpi/event]"
|
|---|
| 18 | //usage: "\n -l FILE Log file [/var/log/acpid.log]"
|
|---|
| 19 | //usage: "\n -p FILE Pid file [/var/run/acpid.pid]"
|
|---|
| 20 | //usage: "\n -a FILE Action file [/etc/acpid.conf]"
|
|---|
| 21 | //usage: "\n -M FILE Map file [/etc/acpi.map]"
|
|---|
| 22 | //usage: IF_FEATURE_ACPID_COMPAT(
|
|---|
| 23 | //usage: "\n\nAccept and ignore compatibility options -g -m -s -S -v"
|
|---|
| 24 | //usage: )
|
|---|
| 25 | //usage:
|
|---|
| 26 | //usage:#define acpid_example_usage
|
|---|
| 27 | //usage: "Without -e option, acpid uses all /dev/input/event* files\n"
|
|---|
| 28 | //usage: "# acpid\n"
|
|---|
| 29 | //usage: "# acpid -l /var/log/my-acpi-log\n"
|
|---|
| 30 | //usage: "# acpid -e /proc/acpi/event\n"
|
|---|
| 31 |
|
|---|
| 32 | #include "libbb.h"
|
|---|
| 33 | #include <syslog.h>
|
|---|
| 34 | #include <linux/input.h>
|
|---|
| 35 |
|
|---|
| 36 | #ifndef EV_SW
|
|---|
| 37 | # define EV_SW 0x05
|
|---|
| 38 | #endif
|
|---|
| 39 | #ifndef EV_KEY
|
|---|
| 40 | # define EV_KEY 0x01
|
|---|
| 41 | #endif
|
|---|
| 42 | #ifndef SW_LID
|
|---|
| 43 | # define SW_LID 0x00
|
|---|
| 44 | #endif
|
|---|
| 45 | #ifndef SW_RFKILL_ALL
|
|---|
| 46 | # define SW_RFKILL_ALL 0x03
|
|---|
| 47 | #endif
|
|---|
| 48 | #ifndef KEY_POWER
|
|---|
| 49 | # define KEY_POWER 116 /* SC System Power Down */
|
|---|
| 50 | #endif
|
|---|
| 51 | #ifndef KEY_SLEEP
|
|---|
| 52 | # define KEY_SLEEP 142 /* SC System Sleep */
|
|---|
| 53 | #endif
|
|---|
| 54 |
|
|---|
| 55 | enum {
|
|---|
| 56 | OPT_c = (1 << 0),
|
|---|
| 57 | OPT_d = (1 << 1),
|
|---|
| 58 | OPT_e = (1 << 2),
|
|---|
| 59 | OPT_f = (1 << 3),
|
|---|
| 60 | OPT_l = (1 << 4),
|
|---|
| 61 | OPT_a = (1 << 5),
|
|---|
| 62 | OPT_M = (1 << 6),
|
|---|
| 63 | OPT_p = (1 << 7) * ENABLE_FEATURE_PIDFILE,
|
|---|
| 64 | };
|
|---|
| 65 |
|
|---|
| 66 | struct acpi_event {
|
|---|
| 67 | const char *s_type;
|
|---|
| 68 | uint16_t n_type;
|
|---|
| 69 | const char *s_code;
|
|---|
| 70 | uint16_t n_code;
|
|---|
| 71 | uint32_t value;
|
|---|
| 72 | const char *desc;
|
|---|
| 73 | };
|
|---|
| 74 |
|
|---|
| 75 | static const struct acpi_event f_evt_tab[] = {
|
|---|
| 76 | { "EV_KEY", 0x01, "KEY_POWER", 116, 1, "button/power PWRF 00000080" },
|
|---|
| 77 | { "EV_KEY", 0x01, "KEY_POWER", 116, 1, "button/power PWRB 00000080" },
|
|---|
| 78 | { "EV_SW", 0x05, "SW_LID", 0x00, 1, "button/lid LID0 00000080" },
|
|---|
| 79 | };
|
|---|
| 80 |
|
|---|
| 81 | struct acpi_action {
|
|---|
| 82 | const char *key;
|
|---|
| 83 | const char *action;
|
|---|
| 84 | };
|
|---|
| 85 |
|
|---|
| 86 | static const struct acpi_action f_act_tab[] = {
|
|---|
| 87 | { "PWRF", "PWRF/00000080" },
|
|---|
| 88 | { "LID0", "LID/00000080" },
|
|---|
| 89 | };
|
|---|
| 90 |
|
|---|
| 91 | struct globals {
|
|---|
| 92 | struct acpi_action *act_tab;
|
|---|
| 93 | int n_act;
|
|---|
| 94 | struct acpi_event *evt_tab;
|
|---|
| 95 | int n_evt;
|
|---|
| 96 | } FIX_ALIASING;
|
|---|
| 97 | #define G (*ptr_to_globals)
|
|---|
| 98 | #define act_tab (G.act_tab)
|
|---|
| 99 | #define n_act (G.n_act )
|
|---|
| 100 | #define evt_tab (G.evt_tab)
|
|---|
| 101 | #define n_evt (G.n_evt )
|
|---|
| 102 | #define INIT_G() do { \
|
|---|
| 103 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
|
|---|
| 104 | } while (0)
|
|---|
| 105 |
|
|---|
| 106 | /*
|
|---|
| 107 | * acpid listens to ACPI events coming either in textual form
|
|---|
| 108 | * from /proc/acpi/event (though it is marked deprecated,
|
|---|
| 109 | * it is still widely used and _is_ a standard) or in binary form
|
|---|
| 110 | * from specified evdevs (just use /dev/input/event*).
|
|---|
| 111 | * It parses the event to retrieve ACTION and a possible PARAMETER.
|
|---|
| 112 | * It then spawns /etc/acpi/<ACTION>[/<PARAMETER>] either via run-parts
|
|---|
| 113 | * (if the resulting path is a directory) or directly.
|
|---|
| 114 | * If the resulting path does not exist it logs it via perror
|
|---|
| 115 | * and continues listening.
|
|---|
| 116 | */
|
|---|
| 117 |
|
|---|
| 118 | static void process_event(const char *event)
|
|---|
| 119 | {
|
|---|
| 120 | struct stat st;
|
|---|
| 121 | char *handler = xasprintf("./%s", event);
|
|---|
| 122 | const char *args[] = { "run-parts", handler, NULL };
|
|---|
| 123 |
|
|---|
| 124 | // log the event
|
|---|
| 125 | bb_error_msg("%s", event);
|
|---|
| 126 |
|
|---|
| 127 | // spawn handler
|
|---|
| 128 | // N.B. run-parts would require scripts to have #!/bin/sh
|
|---|
| 129 | // handler is directory? -> use run-parts
|
|---|
| 130 | // handler is file? -> run it directly
|
|---|
| 131 | if (0 == stat(event, &st))
|
|---|
| 132 | spawn((char **)args + (0==(st.st_mode & S_IFDIR)));
|
|---|
| 133 | else
|
|---|
| 134 | bb_simple_perror_msg(event);
|
|---|
| 135 |
|
|---|
| 136 | free(handler);
|
|---|
| 137 | }
|
|---|
| 138 |
|
|---|
| 139 | static const char *find_action(struct input_event *ev, const char *buf)
|
|---|
| 140 | {
|
|---|
| 141 | const char *action = NULL;
|
|---|
| 142 | int i;
|
|---|
| 143 |
|
|---|
| 144 | // map event
|
|---|
| 145 | for (i = 0; i < n_evt; i++) {
|
|---|
| 146 | if (ev) {
|
|---|
| 147 | if (ev->type == evt_tab[i].n_type && ev->code == evt_tab[i].n_code && ev->value == evt_tab[i].value) {
|
|---|
| 148 | action = evt_tab[i].desc;
|
|---|
| 149 | break;
|
|---|
| 150 | }
|
|---|
| 151 | }
|
|---|
| 152 |
|
|---|
| 153 | if (buf) {
|
|---|
| 154 | if (is_prefixed_with(evt_tab[i].desc, buf)) {
|
|---|
| 155 | action = evt_tab[i].desc;
|
|---|
| 156 | break;
|
|---|
| 157 | }
|
|---|
| 158 | }
|
|---|
| 159 | }
|
|---|
| 160 |
|
|---|
| 161 | // get action
|
|---|
| 162 | if (action) {
|
|---|
| 163 | for (i = 0; i < n_act; i++) {
|
|---|
| 164 | if (strstr(action, act_tab[i].key)) {
|
|---|
| 165 | action = act_tab[i].action;
|
|---|
| 166 | break;
|
|---|
| 167 | }
|
|---|
| 168 | }
|
|---|
| 169 | }
|
|---|
| 170 |
|
|---|
| 171 | return action;
|
|---|
| 172 | }
|
|---|
| 173 |
|
|---|
| 174 | static void parse_conf_file(const char *filename)
|
|---|
| 175 | {
|
|---|
| 176 | parser_t *parser;
|
|---|
| 177 | char *tokens[2];
|
|---|
| 178 |
|
|---|
| 179 | parser = config_open2(filename, fopen_for_read);
|
|---|
| 180 |
|
|---|
| 181 | if (parser) {
|
|---|
| 182 | while (config_read(parser, tokens, 2, 2, "# \t", PARSE_NORMAL)) {
|
|---|
| 183 | act_tab = xrealloc_vector(act_tab, 1, n_act);
|
|---|
| 184 | act_tab[n_act].key = xstrdup(tokens[0]);
|
|---|
| 185 | act_tab[n_act].action = xstrdup(tokens[1]);
|
|---|
| 186 | n_act++;
|
|---|
| 187 | }
|
|---|
| 188 | config_close(parser);
|
|---|
| 189 | } else {
|
|---|
| 190 | act_tab = (void*)f_act_tab;
|
|---|
| 191 | n_act = ARRAY_SIZE(f_act_tab);
|
|---|
| 192 | }
|
|---|
| 193 | }
|
|---|
| 194 |
|
|---|
| 195 | static void parse_map_file(const char *filename)
|
|---|
| 196 | {
|
|---|
| 197 | parser_t *parser;
|
|---|
| 198 | char *tokens[6];
|
|---|
| 199 |
|
|---|
| 200 | parser = config_open2(filename, fopen_for_read);
|
|---|
| 201 |
|
|---|
| 202 | if (parser) {
|
|---|
| 203 | while (config_read(parser, tokens, 6, 6, "# \t", PARSE_NORMAL)) {
|
|---|
| 204 | evt_tab = xrealloc_vector(evt_tab, 1, n_evt);
|
|---|
| 205 | evt_tab[n_evt].s_type = xstrdup(tokens[0]);
|
|---|
| 206 | evt_tab[n_evt].n_type = xstrtou(tokens[1], 16);
|
|---|
| 207 | evt_tab[n_evt].s_code = xstrdup(tokens[2]);
|
|---|
| 208 | evt_tab[n_evt].n_code = xatou16(tokens[3]);
|
|---|
| 209 | evt_tab[n_evt].value = xatoi_positive(tokens[4]);
|
|---|
| 210 | evt_tab[n_evt].desc = xstrdup(tokens[5]);
|
|---|
| 211 | n_evt++;
|
|---|
| 212 | }
|
|---|
| 213 | config_close(parser);
|
|---|
| 214 | } else {
|
|---|
| 215 | evt_tab = (void*)f_evt_tab;
|
|---|
| 216 | n_evt = ARRAY_SIZE(f_evt_tab);
|
|---|
| 217 | }
|
|---|
| 218 | }
|
|---|
| 219 |
|
|---|
| 220 | /*
|
|---|
| 221 | * acpid [-c conf_dir] [-r conf_file ] [-a map_file ] [-l log_file] [-e proc_event_file]
|
|---|
| 222 | */
|
|---|
| 223 |
|
|---|
| 224 | int acpid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|---|
| 225 | int acpid_main(int argc UNUSED_PARAM, char **argv)
|
|---|
| 226 | {
|
|---|
| 227 | int nfd;
|
|---|
| 228 | int opts;
|
|---|
| 229 | struct pollfd *pfd;
|
|---|
| 230 | const char *opt_dir = "/etc/acpi";
|
|---|
| 231 | const char *opt_input = "/dev/input/event";
|
|---|
| 232 | const char *opt_logfile = "/var/log/acpid.log";
|
|---|
| 233 | const char *opt_action = "/etc/acpid.conf";
|
|---|
| 234 | const char *opt_map = "/etc/acpi.map";
|
|---|
| 235 | #if ENABLE_FEATURE_PIDFILE
|
|---|
| 236 | const char *opt_pidfile = CONFIG_PID_FILE_PATH "/acpid.pid";
|
|---|
| 237 | #endif
|
|---|
| 238 |
|
|---|
| 239 | INIT_G();
|
|---|
| 240 |
|
|---|
| 241 | opt_complementary = "df:e--e";
|
|---|
| 242 | opts = getopt32(argv, "c:de:fl:a:M:" IF_FEATURE_PIDFILE("p:") IF_FEATURE_ACPID_COMPAT("g:m:s:S:v"),
|
|---|
| 243 | &opt_dir, &opt_input, &opt_logfile, &opt_action, &opt_map
|
|---|
| 244 | IF_FEATURE_PIDFILE(, &opt_pidfile)
|
|---|
| 245 | IF_FEATURE_ACPID_COMPAT(, NULL, NULL, NULL, NULL)
|
|---|
| 246 | );
|
|---|
| 247 |
|
|---|
| 248 | if (!(opts & OPT_f)) {
|
|---|
| 249 | /* No -f "Foreground", we go to background */
|
|---|
| 250 | bb_daemonize_or_rexec(DAEMON_CLOSE_EXTRA_FDS, argv);
|
|---|
| 251 | }
|
|---|
| 252 |
|
|---|
| 253 | if (!(opts & OPT_d)) {
|
|---|
| 254 | /* No -d "Debug", we log to log file.
|
|---|
| 255 | * This includes any output from children.
|
|---|
| 256 | */
|
|---|
| 257 | xmove_fd(xopen(opt_logfile, O_WRONLY | O_CREAT | O_APPEND), STDOUT_FILENO);
|
|---|
| 258 | xdup2(STDOUT_FILENO, STDERR_FILENO);
|
|---|
| 259 | /* Also, acpid's messages (but not children) will go to syslog too */
|
|---|
| 260 | openlog(applet_name, LOG_PID, LOG_DAEMON);
|
|---|
| 261 | logmode = LOGMODE_SYSLOG | LOGMODE_STDIO;
|
|---|
| 262 | }
|
|---|
| 263 | /* else: -d "Debug", log is not redirected */
|
|---|
| 264 |
|
|---|
| 265 | parse_conf_file(opt_action);
|
|---|
| 266 | parse_map_file(opt_map);
|
|---|
| 267 |
|
|---|
| 268 | xchdir(opt_dir);
|
|---|
| 269 |
|
|---|
| 270 | /* We spawn children but don't wait for them. Prevent zombies: */
|
|---|
| 271 | bb_signals((1 << SIGCHLD), SIG_IGN);
|
|---|
| 272 | // If you enable this, (1) explain why, (2)
|
|---|
| 273 | // make sure while(poll) loop below is still interruptible
|
|---|
| 274 | // by SIGTERM et al:
|
|---|
| 275 | //bb_signals(BB_FATAL_SIGS, record_signo);
|
|---|
| 276 |
|
|---|
| 277 | pfd = NULL;
|
|---|
| 278 | nfd = 0;
|
|---|
| 279 | while (1) {
|
|---|
| 280 | int fd;
|
|---|
| 281 | char *dev_event;
|
|---|
| 282 |
|
|---|
| 283 | dev_event = xasprintf((opts & OPT_e) ? "%s" : "%s%u", opt_input, nfd);
|
|---|
| 284 | fd = open(dev_event, O_RDONLY | O_NONBLOCK);
|
|---|
| 285 | if (fd < 0) {
|
|---|
| 286 | if (nfd == 0)
|
|---|
| 287 | bb_simple_perror_msg_and_die(dev_event);
|
|---|
| 288 | break;
|
|---|
| 289 | }
|
|---|
| 290 | free(dev_event);
|
|---|
| 291 | pfd = xrealloc_vector(pfd, 1, nfd);
|
|---|
| 292 | pfd[nfd].fd = fd;
|
|---|
| 293 | pfd[nfd].events = POLLIN;
|
|---|
| 294 | nfd++;
|
|---|
| 295 | }
|
|---|
| 296 |
|
|---|
| 297 | write_pidfile(opt_pidfile);
|
|---|
| 298 |
|
|---|
| 299 | while (safe_poll(pfd, nfd, -1) > 0) {
|
|---|
| 300 | int i;
|
|---|
| 301 | for (i = 0; i < nfd; i++) {
|
|---|
| 302 | const char *event;
|
|---|
| 303 |
|
|---|
| 304 | if (!(pfd[i].revents & POLLIN)) {
|
|---|
| 305 | if (pfd[i].revents == 0)
|
|---|
| 306 | continue; /* this fd has nothing */
|
|---|
| 307 |
|
|---|
| 308 | /* Likely POLLERR, POLLHUP, POLLNVAL.
|
|---|
| 309 | * Do not listen on this fd anymore.
|
|---|
| 310 | */
|
|---|
| 311 | close(pfd[i].fd);
|
|---|
| 312 | nfd--;
|
|---|
| 313 | for (; i < nfd; i++)
|
|---|
| 314 | pfd[i].fd = pfd[i + 1].fd;
|
|---|
| 315 | break; /* do poll() again */
|
|---|
| 316 | }
|
|---|
| 317 |
|
|---|
| 318 | event = NULL;
|
|---|
| 319 | if (option_mask32 & OPT_e) {
|
|---|
| 320 | char *buf;
|
|---|
| 321 | int len;
|
|---|
| 322 |
|
|---|
| 323 | buf = xmalloc_reads(pfd[i].fd, NULL);
|
|---|
| 324 | /* buf = "button/power PWRB 00000080 00000000" */
|
|---|
| 325 | len = strlen(buf) - 9;
|
|---|
| 326 | if (len >= 0)
|
|---|
| 327 | buf[len] = '\0';
|
|---|
| 328 | event = find_action(NULL, buf);
|
|---|
| 329 | free(buf);
|
|---|
| 330 | } else {
|
|---|
| 331 | struct input_event ev;
|
|---|
| 332 |
|
|---|
| 333 | if (sizeof(ev) != full_read(pfd[i].fd, &ev, sizeof(ev)))
|
|---|
| 334 | continue;
|
|---|
| 335 |
|
|---|
| 336 | if (ev.value != 1 && ev.value != 0)
|
|---|
| 337 | continue;
|
|---|
| 338 |
|
|---|
| 339 | event = find_action(&ev, NULL);
|
|---|
| 340 | }
|
|---|
| 341 | if (!event)
|
|---|
| 342 | continue;
|
|---|
| 343 | /* spawn event handler */
|
|---|
| 344 | process_event(event);
|
|---|
| 345 | }
|
|---|
| 346 | }
|
|---|
| 347 |
|
|---|
| 348 | if (ENABLE_FEATURE_CLEAN_UP) {
|
|---|
| 349 | while (nfd--)
|
|---|
| 350 | close(pfd[nfd].fd);
|
|---|
| 351 | free(pfd);
|
|---|
| 352 | }
|
|---|
| 353 | remove_pidfile(opt_pidfile);
|
|---|
| 354 |
|
|---|
| 355 | return EXIT_SUCCESS;
|
|---|
| 356 | }
|
|---|
