acpid: new applet by Vladimir. +737 bytes
This commit is contained in:
Denis Vlasenko
parent
f7d87f9b18
commit
d16950ded9
@ -32,8 +32,8 @@
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<a href="http://busybox.net/downloads/fixes-1.12.3/">patches</a>,
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<a href="http://busybox.net/fix.html">how to add a patch</a>)</p>
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<p>Bug-fix releases. 1.13.1 has fixes for ash, option parsing, id, init,
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inotify, klogd, line editing and modprobe. 1.12.3 has fixes
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<p>Bug fix releases. 1.13.1 has fixes for ash, option parsing, id, init,
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inotifyd, klogd, line editing and modprobe. 1.12.3 has fixes
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for option parsing and line editing.
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</p>
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</li>
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@ -69,6 +69,7 @@ s - suid type:
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USE_TEST(APPLET_NOFORK([, test, _BB_DIR_USR_BIN, _BB_SUID_NEVER, test))
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USE_TEST(APPLET_NOFORK([[, test, _BB_DIR_USR_BIN, _BB_SUID_NEVER, test))
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USE_ACPID(APPLET(acpid, _BB_DIR_SBIN, _BB_SUID_NEVER))
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USE_ADDGROUP(APPLET(addgroup, _BB_DIR_BIN, _BB_SUID_NEVER))
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USE_ADDUSER(APPLET(adduser, _BB_DIR_BIN, _BB_SUID_NEVER))
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USE_ADJTIMEX(APPLET(adjtimex, _BB_DIR_SBIN, _BB_SUID_NEVER))
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@ -16,6 +16,23 @@
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#define NOUSAGE_STR "\b"
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#define acpid_trivial_usage \
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"[-d] [-c CONFDIR] [-l LOGFILE] [-e PROC_EVENT_FILE] [EVDEV_EVENT_FILE...]"
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#define acpid_full_usage "\n\n" \
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"Listen to ACPI events and spawn specific helpers on event arrival\n" \
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"\nOptions:" \
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"\n -d Do not daemonize and log to stderr" \
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"\n -c DIR Config directory [/etc/acpi]" \
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"\n -e FILE /proc event file [/proc/acpi/event]" \
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"\n -l FILE Log file [/var/log/acpid]" \
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USE_FEATURE_ACPID_COMPAT( \
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"\n\nAccept and ignore compatibility options -g -m -s -S -v" \
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)
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#define acpid_example_usage \
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"# acpid -l /var/log/my-acpi-log\n" \
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"# acpid -d /dev/input/event*\n"
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#define addgroup_trivial_usage \
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"[-g GID] " USE_FEATURE_ADDUSER_TO_GROUP("[user_name] ") "group_name"
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@ -5,6 +5,28 @@
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menu "Linux System Utilities"
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config ACPID
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bool "acpid"
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default n
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help
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acpid listens to ACPI events coming either in textual form from
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/proc/acpi/event (though it is marked deprecated it is still widely
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used and _is_ a standard) or in binary form from specified evdevs
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(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 as an executable.
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N.B. acpid relies on run-parts so have the latter installed.
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config FEATURE_ACPID_COMPAT
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bool "Accept and ignore redundant options"
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default n
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depends on ACPID
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help
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Accept and ignore compatibility options -g -m -s -S -v.
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config BLKID
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bool "blkid"
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default n
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@ -5,6 +5,7 @@
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# Licensed under the GPL v2, see the file LICENSE in this tarball.
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lib-y:=
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lib-$(CONFIG_ACPID) += acpid.o
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lib-$(CONFIG_BLKID) += blkid.o
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lib-$(CONFIG_DMESG) += dmesg.o
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lib-$(CONFIG_FBSET) += fbset.o
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167
util-linux/acpid.c
Normal file
167
util-linux/acpid.c
Normal file
@ -0,0 +1,167 @@
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/* 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 tarball for details.
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*/
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#include "libbb.h"
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#include <linux/input.h>
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#ifndef SW_RFKILL_ALL
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# define SW_RFKILL_ALL 3
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#endif
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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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// debug info
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if (option_mask32 & 8) { // -d
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bb_error_msg("%s", event);
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}
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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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/*
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* acpid [-c conf_dir] [-l log_file] [-e proc_event_file] [evdev_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, char **argv)
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{
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struct pollfd *pfd;
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int i, nfd;
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const char *opt_conf = "/etc/acpi";
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const char *opt_input = "/proc/acpi/event";
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const char *opt_logfile = "/var/log/acpid.log";
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getopt32(argv, "c:e:l:d"
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USE_FEATURE_ACPID_COMPAT("g:m:s:S:v"),
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&opt_conf, &opt_input, &opt_logfile
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USE_FEATURE_ACPID_COMPAT(, NULL, NULL, NULL, NULL, NULL)
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);
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// daemonize unless -d given
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if (!(option_mask32 & 8)) { // ! -d
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bb_daemonize_or_rexec(0, argv);
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close(2);
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xopen(opt_logfile, O_WRONLY | O_CREAT | O_TRUNC);
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}
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argv += optind;
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// goto configuration directory
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xchdir(opt_conf);
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// // setup signals
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// bb_signals(BB_FATAL_SIGS, record_signo);
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// no explicit evdev files given? -> use proc event interface
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if (!*argv) {
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// proc_event file is just a "config" :)
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char *token[4];
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parser_t *parser = config_open(opt_input);
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// dispatch events
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while (config_read(parser, token, 4, 4, "\0 ", PARSE_NORMAL)) {
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char *event = xasprintf("%s/%s", token[1], token[2]);
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process_event(event);
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free(event);
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}
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if (ENABLE_FEATURE_CLEAN_UP)
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config_close(parser);
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return EXIT_SUCCESS;
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}
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// evdev files given, use evdev interface
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// open event devices
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pfd = xzalloc(sizeof(*pfd) * (argc - optind));
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nfd = 0;
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while (*argv) {
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pfd[nfd].fd = open_or_warn(*argv++, O_RDONLY | O_NONBLOCK);
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if (pfd[nfd].fd >= 0)
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pfd[nfd++].events = POLLIN;
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}
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// dispatch events
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while (/* !bb_got_signal && */ poll(pfd, nfd, -1) > 0) {
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for (i = 0; i < nfd; i++) {
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const char *event;
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struct input_event ev;
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if (!(pfd[i].revents & POLLIN))
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continue;
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if (sizeof(ev) != full_read(pfd[i].fd, &ev, sizeof(ev)))
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continue;
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//bb_info_msg("%d: %d %d %4d", i, ev.type, ev.code, ev.value);
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// filter out unneeded events
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if (ev.value != 1)
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continue;
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event = NULL;
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// N.B. we will conform to /proc/acpi/event
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// naming convention when assigning event names
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// TODO: do we want other events?
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// power and sleep buttons delivered as keys pressed
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if (EV_KEY == ev.type) {
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if (KEY_POWER == ev.code)
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event = "PWRF/00000080";
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else if (KEY_SLEEP == ev.code)
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event = "SLPB/00000080";
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}
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// switches
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else if (EV_SW == ev.type) {
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if (SW_LID == ev.code)
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event = "LID/00000080";
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else if (SW_RFKILL_ALL == ev.code)
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event = "RFKILL";
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}
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// filter out unneeded events
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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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for (i = 0; i < nfd; i++)
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close(pfd[i].fd);
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free(pfd);
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}
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return EXIT_SUCCESS;
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}
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