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function old new delta is_prefixed_with - 18 +18 complete_username 78 77 -1 man_main 737 735 -2 fsck_device 429 427 -2 unpack_ar_archive 80 76 -4 strip_unsafe_prefix 105 101 -4 singlemount 1054 1050 -4 rtc_adjtime_is_utc 90 86 -4 resolve_mount_spec 88 84 -4 parse_one_line 1029 1025 -4 parse_conf 1460 1456 -4 may_wakeup 83 79 -4 loadkmap_main 219 215 -4 get_irqs_from_stat 103 99 -4 get_header_cpio 913 909 -4 findfs_main 79 75 -4 fbsplash_main 1230 1226 -4 load_crontab 776 771 -5 expand_vars_to_list 1151 1146 -5 date_main 881 876 -5 skip_dev_pfx 30 24 -6 make_device 2199 2193 -6 complete_cmd_dir_file 773 767 -6 run_applet_and_exit 715 708 -7 uudecode_main 321 313 -8 pwdx_main 197 189 -8 execute 568 560 -8 i2cdetect_main 1186 1176 -10 procps_scan 1242 1230 -12 procps_read_smaps 1017 1005 -12 process_module 746 734 -12 patch_main 1903 1891 -12 nfsmount 3572 3560 -12 stack_machine 126 112 -14 process_timer_stats 449 435 -14 match_fstype 111 97 -14 do_ipaddr 1344 1330 -14 open_list_and_close 359 343 -16 get_header_tar 1795 1779 -16 prepend_new_eth_table 340 323 -17 fsck_main 1811 1794 -17 find_iface_state 56 38 -18 dnsd_main 1321 1303 -18 base_device 179 158 -21 find_keyword 104 82 -22 handle_incoming_and_exit 2785 2762 -23 parse_and_put_prompt 774 746 -28 modinfo 347 317 -30 find_action 204 171 -33 update_passwd 1470 1436 -34 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/49 up/down: 18/-540) Total: -522 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
357 lines
8.8 KiB
C
357 lines
8.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* simple ACPI events listener
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*
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* Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//usage:#define acpid_trivial_usage
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//usage: "[-df] [-c CONFDIR] [-l LOGFILE] [-a ACTIONFILE] [-M MAPFILE] [-e PROC_EVENT_FILE] [-p PIDFILE]"
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//usage:#define acpid_full_usage "\n\n"
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//usage: "Listen to ACPI events and spawn specific helpers on event arrival\n"
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//usage: "\n -d Log to stderr, not log file (implies -f)"
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//usage: "\n -f Run in foreground"
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//usage: "\n -c DIR Config directory [/etc/acpi]"
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//usage: "\n -e FILE /proc event file [/proc/acpi/event]"
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//usage: "\n -l FILE Log file [/var/log/acpid.log]"
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//usage: "\n -p FILE Pid file [/var/run/acpid.pid]"
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//usage: "\n -a FILE Action file [/etc/acpid.conf]"
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//usage: "\n -M FILE Map file [/etc/acpi.map]"
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//usage: IF_FEATURE_ACPID_COMPAT(
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//usage: "\n\nAccept and ignore compatibility options -g -m -s -S -v"
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//usage: )
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//usage:
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//usage:#define acpid_example_usage
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//usage: "Without -e option, acpid uses all /dev/input/event* files\n"
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//usage: "# acpid\n"
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//usage: "# acpid -l /var/log/my-acpi-log\n"
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//usage: "# acpid -e /proc/acpi/event\n"
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#include "libbb.h"
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#include <syslog.h>
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#include <linux/input.h>
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#ifndef EV_SW
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# define EV_SW 0x05
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#endif
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#ifndef EV_KEY
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# define EV_KEY 0x01
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#endif
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#ifndef SW_LID
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# define SW_LID 0x00
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#endif
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#ifndef SW_RFKILL_ALL
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# define SW_RFKILL_ALL 0x03
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#endif
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#ifndef KEY_POWER
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# define KEY_POWER 116 /* SC System Power Down */
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#endif
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#ifndef KEY_SLEEP
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# define KEY_SLEEP 142 /* SC System Sleep */
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#endif
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enum {
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OPT_c = (1 << 0),
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OPT_d = (1 << 1),
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OPT_e = (1 << 2),
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OPT_f = (1 << 3),
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OPT_l = (1 << 4),
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OPT_a = (1 << 5),
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OPT_M = (1 << 6),
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OPT_p = (1 << 7) * ENABLE_FEATURE_PIDFILE,
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};
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struct acpi_event {
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const char *s_type;
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uint16_t n_type;
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const char *s_code;
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uint16_t n_code;
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uint32_t value;
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const char *desc;
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};
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static const struct acpi_event f_evt_tab[] = {
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{ "EV_KEY", 0x01, "KEY_POWER", 116, 1, "button/power PWRF 00000080" },
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{ "EV_KEY", 0x01, "KEY_POWER", 116, 1, "button/power PWRB 00000080" },
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{ "EV_SW", 0x05, "SW_LID", 0x00, 1, "button/lid LID0 00000080" },
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};
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struct acpi_action {
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const char *key;
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const char *action;
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};
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static const struct acpi_action f_act_tab[] = {
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{ "PWRF", "PWRF/00000080" },
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{ "LID0", "LID/00000080" },
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};
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struct globals {
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struct acpi_action *act_tab;
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int n_act;
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struct acpi_event *evt_tab;
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int n_evt;
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} FIX_ALIASING;
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#define G (*ptr_to_globals)
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#define act_tab (G.act_tab)
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#define n_act (G.n_act )
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#define evt_tab (G.evt_tab)
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#define n_evt (G.n_evt )
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#define INIT_G() do { \
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SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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} while (0)
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/*
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* acpid listens to ACPI events coming either in textual form
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* from /proc/acpi/event (though it is marked deprecated,
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* it is still widely used and _is_ a standard) or in binary form
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* from specified evdevs (just use /dev/input/event*).
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* It parses the event to retrieve ACTION and a possible PARAMETER.
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* It then spawns /etc/acpi/<ACTION>[/<PARAMETER>] either via run-parts
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* (if the resulting path is a directory) or directly.
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* If the resulting path does not exist it logs it via perror
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* and continues listening.
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*/
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static void process_event(const char *event)
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{
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struct stat st;
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char *handler = xasprintf("./%s", event);
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const char *args[] = { "run-parts", handler, NULL };
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// log the event
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bb_error_msg("%s", event);
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// spawn handler
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// N.B. run-parts would require scripts to have #!/bin/sh
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// handler is directory? -> use run-parts
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// handler is file? -> run it directly
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if (0 == stat(event, &st))
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spawn((char **)args + (0==(st.st_mode & S_IFDIR)));
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else
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bb_simple_perror_msg(event);
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free(handler);
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}
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static const char *find_action(struct input_event *ev, const char *buf)
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{
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const char *action = NULL;
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int i;
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// map event
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for (i = 0; i < n_evt; i++) {
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if (ev) {
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if (ev->type == evt_tab[i].n_type && ev->code == evt_tab[i].n_code && ev->value == evt_tab[i].value) {
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action = evt_tab[i].desc;
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break;
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}
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}
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if (buf) {
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if (is_prefixed_with(evt_tab[i].desc, buf)) {
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action = evt_tab[i].desc;
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break;
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}
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}
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}
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// get action
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if (action) {
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for (i = 0; i < n_act; i++) {
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if (strstr(action, act_tab[i].key)) {
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action = act_tab[i].action;
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break;
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}
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}
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}
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return action;
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}
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static void parse_conf_file(const char *filename)
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{
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parser_t *parser;
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char *tokens[2];
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parser = config_open2(filename, fopen_for_read);
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if (parser) {
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while (config_read(parser, tokens, 2, 2, "# \t", PARSE_NORMAL)) {
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act_tab = xrealloc_vector(act_tab, 1, n_act);
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act_tab[n_act].key = xstrdup(tokens[0]);
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act_tab[n_act].action = xstrdup(tokens[1]);
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n_act++;
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}
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config_close(parser);
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} else {
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act_tab = (void*)f_act_tab;
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n_act = ARRAY_SIZE(f_act_tab);
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}
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}
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static void parse_map_file(const char *filename)
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{
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parser_t *parser;
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char *tokens[6];
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parser = config_open2(filename, fopen_for_read);
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if (parser) {
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while (config_read(parser, tokens, 6, 6, "# \t", PARSE_NORMAL)) {
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evt_tab = xrealloc_vector(evt_tab, 1, n_evt);
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evt_tab[n_evt].s_type = xstrdup(tokens[0]);
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evt_tab[n_evt].n_type = xstrtou(tokens[1], 16);
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evt_tab[n_evt].s_code = xstrdup(tokens[2]);
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evt_tab[n_evt].n_code = xatou16(tokens[3]);
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evt_tab[n_evt].value = xatoi_positive(tokens[4]);
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evt_tab[n_evt].desc = xstrdup(tokens[5]);
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n_evt++;
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}
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config_close(parser);
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} else {
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evt_tab = (void*)f_evt_tab;
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n_evt = ARRAY_SIZE(f_evt_tab);
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}
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}
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/*
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* acpid [-c conf_dir] [-r conf_file ] [-a map_file ] [-l log_file] [-e proc_event_file]
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*/
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int acpid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int acpid_main(int argc UNUSED_PARAM, char **argv)
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{
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int nfd;
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int opts;
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struct pollfd *pfd;
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const char *opt_dir = "/etc/acpi";
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const char *opt_input = "/dev/input/event";
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const char *opt_logfile = "/var/log/acpid.log";
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const char *opt_action = "/etc/acpid.conf";
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const char *opt_map = "/etc/acpi.map";
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#if ENABLE_FEATURE_PIDFILE
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const char *opt_pidfile = CONFIG_PID_FILE_PATH "/acpid.pid";
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#endif
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INIT_G();
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opt_complementary = "df:e--e";
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opts = getopt32(argv, "c:de:fl:a:M:" IF_FEATURE_PIDFILE("p:") IF_FEATURE_ACPID_COMPAT("g:m:s:S:v"),
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&opt_dir, &opt_input, &opt_logfile, &opt_action, &opt_map
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IF_FEATURE_PIDFILE(, &opt_pidfile)
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IF_FEATURE_ACPID_COMPAT(, NULL, NULL, NULL, NULL)
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);
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if (!(opts & OPT_f)) {
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/* No -f "Foreground", we go to background */
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bb_daemonize_or_rexec(DAEMON_CLOSE_EXTRA_FDS, argv);
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}
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if (!(opts & OPT_d)) {
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/* No -d "Debug", we log to log file.
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* This includes any output from children.
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*/
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xmove_fd(xopen(opt_logfile, O_WRONLY | O_CREAT | O_APPEND), STDOUT_FILENO);
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xdup2(STDOUT_FILENO, STDERR_FILENO);
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/* Also, acpid's messages (but not children) will go to syslog too */
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openlog(applet_name, LOG_PID, LOG_DAEMON);
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logmode = LOGMODE_SYSLOG | LOGMODE_STDIO;
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}
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/* else: -d "Debug", log is not redirected */
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parse_conf_file(opt_action);
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parse_map_file(opt_map);
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xchdir(opt_dir);
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/* We spawn children but don't wait for them. Prevent zombies: */
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bb_signals((1 << SIGCHLD), SIG_IGN);
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// If you enable this, (1) explain why, (2)
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// make sure while(poll) loop below is still interruptible
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// by SIGTERM et al:
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//bb_signals(BB_FATAL_SIGS, record_signo);
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pfd = NULL;
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nfd = 0;
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while (1) {
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int fd;
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char *dev_event;
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dev_event = xasprintf((opts & OPT_e) ? "%s" : "%s%u", opt_input, nfd);
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fd = open(dev_event, O_RDONLY | O_NONBLOCK);
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if (fd < 0) {
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if (nfd == 0)
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bb_simple_perror_msg_and_die(dev_event);
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break;
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}
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free(dev_event);
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pfd = xrealloc_vector(pfd, 1, nfd);
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pfd[nfd].fd = fd;
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pfd[nfd].events = POLLIN;
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nfd++;
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}
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write_pidfile(opt_pidfile);
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while (safe_poll(pfd, nfd, -1) > 0) {
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int i;
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for (i = 0; i < nfd; i++) {
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const char *event;
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if (!(pfd[i].revents & POLLIN)) {
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if (pfd[i].revents == 0)
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continue; /* this fd has nothing */
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/* Likely POLLERR, POLLHUP, POLLNVAL.
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* Do not listen on this fd anymore.
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*/
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close(pfd[i].fd);
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nfd--;
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for (; i < nfd; i++)
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pfd[i].fd = pfd[i + 1].fd;
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break; /* do poll() again */
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}
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event = NULL;
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if (option_mask32 & OPT_e) {
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char *buf;
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int len;
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buf = xmalloc_reads(pfd[i].fd, NULL);
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/* buf = "button/power PWRB 00000080 00000000" */
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len = strlen(buf) - 9;
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if (len >= 0)
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buf[len] = '\0';
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event = find_action(NULL, buf);
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free(buf);
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} else {
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struct input_event ev;
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if (sizeof(ev) != full_read(pfd[i].fd, &ev, sizeof(ev)))
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continue;
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if (ev.value != 1 && ev.value != 0)
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continue;
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event = find_action(&ev, NULL);
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}
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if (!event)
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continue;
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/* spawn event handler */
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process_event(event);
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}
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}
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if (ENABLE_FEATURE_CLEAN_UP) {
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while (nfd--)
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close(pfd[nfd].fd);
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free(pfd);
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}
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remove_pidfile(opt_pidfile);
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return EXIT_SUCCESS;
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}
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