Annotation of /trunk/mkinitrd-magellan/busybox/util-linux/acpid.c
Parent Directory | Revision Log
Revision 1123 -
(hide annotations)
(download)
Wed Aug 18 21:56:57 2010 UTC (13 years, 9 months ago) by niro
File MIME type: text/plain
File size: 4430 byte(s)
Wed Aug 18 21:56:57 2010 UTC (13 years, 9 months ago) by niro
File MIME type: text/plain
File size: 4430 byte(s)
-updated to busybox-1.17.1
1 | niro | 984 | /* 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 tarball for details. | ||
8 | */ | ||
9 | #include "libbb.h" | ||
10 | |||
11 | #include <linux/input.h> | ||
12 | niro | 1123 | #ifndef EV_SW |
13 | # define EV_SW 0x05 | ||
14 | #endif | ||
15 | #ifndef EV_KEY | ||
16 | # define EV_KEY 0x01 | ||
17 | #endif | ||
18 | #ifndef SW_LID | ||
19 | # define SW_LID 0x00 | ||
20 | #endif | ||
21 | niro | 984 | #ifndef SW_RFKILL_ALL |
22 | niro | 1123 | # define SW_RFKILL_ALL 0x03 |
23 | niro | 984 | #endif |
24 | niro | 1123 | #ifndef KEY_POWER |
25 | # define KEY_POWER 116 /* SC System Power Down */ | ||
26 | #endif | ||
27 | #ifndef KEY_SLEEP | ||
28 | # define KEY_SLEEP 142 /* SC System Sleep */ | ||
29 | #endif | ||
30 | niro | 984 | |
31 | niro | 1123 | |
32 | niro | 984 | /* |
33 | * acpid listens to ACPI events coming either in textual form | ||
34 | * from /proc/acpi/event (though it is marked deprecated, | ||
35 | * it is still widely used and _is_ a standard) or in binary form | ||
36 | * from specified evdevs (just use /dev/input/event*). | ||
37 | * It parses the event to retrieve ACTION and a possible PARAMETER. | ||
38 | * It then spawns /etc/acpi/<ACTION>[/<PARAMETER>] either via run-parts | ||
39 | * (if the resulting path is a directory) or directly. | ||
40 | * If the resulting path does not exist it logs it via perror | ||
41 | * and continues listening. | ||
42 | */ | ||
43 | |||
44 | static void process_event(const char *event) | ||
45 | { | ||
46 | struct stat st; | ||
47 | char *handler = xasprintf("./%s", event); | ||
48 | const char *args[] = { "run-parts", handler, NULL }; | ||
49 | |||
50 | // debug info | ||
51 | if (option_mask32 & 8) { // -d | ||
52 | bb_error_msg("%s", event); | ||
53 | } | ||
54 | |||
55 | // spawn handler | ||
56 | // N.B. run-parts would require scripts to have #!/bin/sh | ||
57 | // handler is directory? -> use run-parts | ||
58 | // handler is file? -> run it directly | ||
59 | if (0 == stat(event, &st)) | ||
60 | spawn((char **)args + (0==(st.st_mode & S_IFDIR))); | ||
61 | else | ||
62 | bb_simple_perror_msg(event); | ||
63 | free(handler); | ||
64 | } | ||
65 | |||
66 | /* | ||
67 | * acpid [-c conf_dir] [-l log_file] [-e proc_event_file] [evdev_event_file...] | ||
68 | */ | ||
69 | |||
70 | int acpid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; | ||
71 | int acpid_main(int argc, char **argv) | ||
72 | { | ||
73 | struct pollfd *pfd; | ||
74 | int i, nfd; | ||
75 | const char *opt_conf = "/etc/acpi"; | ||
76 | const char *opt_input = "/proc/acpi/event"; | ||
77 | const char *opt_logfile = "/var/log/acpid.log"; | ||
78 | |||
79 | getopt32(argv, "c:e:l:d" | ||
80 | IF_FEATURE_ACPID_COMPAT("g:m:s:S:v"), | ||
81 | &opt_conf, &opt_input, &opt_logfile | ||
82 | IF_FEATURE_ACPID_COMPAT(, NULL, NULL, NULL, NULL, NULL) | ||
83 | ); | ||
84 | |||
85 | // daemonize unless -d given | ||
86 | if (!(option_mask32 & 8)) { // ! -d | ||
87 | bb_daemonize_or_rexec(0, argv); | ||
88 | close(2); | ||
89 | xopen(opt_logfile, O_WRONLY | O_CREAT | O_TRUNC); | ||
90 | } | ||
91 | |||
92 | argv += optind; | ||
93 | argc -= optind; | ||
94 | |||
95 | // goto configuration directory | ||
96 | xchdir(opt_conf); | ||
97 | |||
98 | // prevent zombies | ||
99 | signal(SIGCHLD, SIG_IGN); | ||
100 | |||
101 | // no explicit evdev files given? -> use proc event interface | ||
102 | if (!*argv) { | ||
103 | // proc_event file is just a "config" :) | ||
104 | char *token[4]; | ||
105 | parser_t *parser = config_open(opt_input); | ||
106 | |||
107 | // dispatch events | ||
108 | while (config_read(parser, token, 4, 4, "\0 ", PARSE_NORMAL)) { | ||
109 | char *event = xasprintf("%s/%s", token[1], token[2]); | ||
110 | process_event(event); | ||
111 | free(event); | ||
112 | } | ||
113 | |||
114 | if (ENABLE_FEATURE_CLEAN_UP) | ||
115 | config_close(parser); | ||
116 | return EXIT_SUCCESS; | ||
117 | } | ||
118 | |||
119 | // evdev files given, use evdev interface | ||
120 | |||
121 | // open event devices | ||
122 | pfd = xzalloc(sizeof(*pfd) * argc); | ||
123 | nfd = 0; | ||
124 | while (*argv) { | ||
125 | pfd[nfd].fd = open_or_warn(*argv++, O_RDONLY | O_NONBLOCK); | ||
126 | if (pfd[nfd].fd >= 0) | ||
127 | pfd[nfd++].events = POLLIN; | ||
128 | } | ||
129 | |||
130 | // dispatch events | ||
131 | while (/* !bb_got_signal && */ poll(pfd, nfd, -1) > 0) { | ||
132 | for (i = 0; i < nfd; i++) { | ||
133 | const char *event; | ||
134 | struct input_event ev; | ||
135 | |||
136 | if (!(pfd[i].revents & POLLIN)) | ||
137 | continue; | ||
138 | |||
139 | if (sizeof(ev) != full_read(pfd[i].fd, &ev, sizeof(ev))) | ||
140 | continue; | ||
141 | //bb_info_msg("%d: %d %d %4d", i, ev.type, ev.code, ev.value); | ||
142 | |||
143 | // filter out unneeded events | ||
144 | if (ev.value != 1) | ||
145 | continue; | ||
146 | |||
147 | event = NULL; | ||
148 | |||
149 | // N.B. we will conform to /proc/acpi/event | ||
150 | // naming convention when assigning event names | ||
151 | |||
152 | // TODO: do we want other events? | ||
153 | |||
154 | // power and sleep buttons delivered as keys pressed | ||
155 | if (EV_KEY == ev.type) { | ||
156 | if (KEY_POWER == ev.code) | ||
157 | event = "PWRF/00000080"; | ||
158 | else if (KEY_SLEEP == ev.code) | ||
159 | event = "SLPB/00000080"; | ||
160 | } | ||
161 | // switches | ||
162 | else if (EV_SW == ev.type) { | ||
163 | if (SW_LID == ev.code) | ||
164 | event = "LID/00000080"; | ||
165 | else if (SW_RFKILL_ALL == ev.code) | ||
166 | event = "RFKILL"; | ||
167 | } | ||
168 | // filter out unneeded events | ||
169 | if (!event) | ||
170 | continue; | ||
171 | |||
172 | // spawn event handler | ||
173 | process_event(event); | ||
174 | } | ||
175 | } | ||
176 | |||
177 | if (ENABLE_FEATURE_CLEAN_UP) { | ||
178 | for (i = 0; i < nfd; i++) | ||
179 | close(pfd[i].fd); | ||
180 | free(pfd); | ||
181 | } | ||
182 | |||
183 | return EXIT_SUCCESS; | ||
184 | } |