2008-11-29 14:35:50 +05:30
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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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2010-08-16 23:44:46 +05:30
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* Licensed under GPLv2, see file LICENSE in this source tree.
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2008-11-29 14:35:50 +05:30
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*/
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2016-11-23 16:16:32 +05:30
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//config:config ACPID
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2018-12-28 07:50:17 +05:30
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//config: bool "acpid (9 kb)"
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2016-11-23 16:16:32 +05:30
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//config: default y
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//config: help
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2017-07-21 13:20:55 +05:30
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//config: acpid listens to ACPI events coming either in textual form from
|
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//config: /proc/acpi/event (though it is marked deprecated it is still widely
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//config: used and _is_ a standard) or in binary form from specified evdevs
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//config: (just use /dev/input/event*).
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2016-11-23 16:16:32 +05:30
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//config:
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2017-07-21 13:20:55 +05:30
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//config: It parses the event to retrieve ACTION and a possible PARAMETER.
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//config: It then spawns /etc/acpi/<ACTION>[/<PARAMETER>] either via run-parts
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//config: (if the resulting path is a directory) or directly as an executable.
|
2016-11-23 16:16:32 +05:30
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//config:
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2017-07-21 13:20:55 +05:30
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//config: N.B. acpid relies on run-parts so have the latter installed.
|
2016-11-23 16:16:32 +05:30
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//config:
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//config:config FEATURE_ACPID_COMPAT
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//config: bool "Accept and ignore redundant options"
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//config: default y
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//config: depends on ACPID
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//config: help
|
2017-07-21 13:20:55 +05:30
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//config: Accept and ignore compatibility options -g -m -s -S -v.
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2016-11-23 16:16:32 +05:30
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//applet:IF_ACPID(APPLET(acpid, BB_DIR_SBIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_ACPID) += acpid.o
|
2011-04-11 06:59:49 +05:30
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//usage:#define acpid_trivial_usage
|
2012-01-09 09:31:25 +05:30
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//usage: "[-df] [-c CONFDIR] [-l LOGFILE] [-a ACTIONFILE] [-M MAPFILE] [-e PROC_EVENT_FILE] [-p PIDFILE]"
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2011-04-11 06:59:49 +05:30
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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"
|
2012-01-09 09:31:25 +05:30
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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"
|
2011-04-11 06:59:49 +05:30
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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]"
|
2020-02-15 02:46:11 +05:30
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//usage: IF_FEATURE_PIDFILE(
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//usage: "\n -p FILE Pid file [" CONFIG_PID_FILE_PATH "/acpid.pid]"
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//usage: )
|
2011-04-11 06:59:49 +05:30
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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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|
2008-11-29 14:35:50 +05:30
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#include "libbb.h"
|
2010-09-26 16:10:05 +05:30
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#include <syslog.h>
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2008-11-29 14:35:50 +05:30
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#include <linux/input.h>
|
2010-07-12 09:50:11 +05:30
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2011-07-08 12:19:40 +05:30
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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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|
2010-09-26 16:10:05 +05:30
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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),
|
2010-11-23 04:19:10 +05:30
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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,
|
2010-09-26 16:10:05 +05:30
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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" },
|
2012-07-07 22:36:50 +05:30
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|
|
{ "EV_SW", 0x05, "SW_LID", 0x00, 1, "button/lid LID0 00000080" },
|
2010-09-26 16:10:05 +05:30
|
|
|
};
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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" },
|
|
|
|
{ "LID0", "LID/00000080" },
|
|
|
|
};
|
|
|
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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;
|
|
|
|
int n_evt;
|
|
|
|
} FIX_ALIASING;
|
|
|
|
#define G (*ptr_to_globals)
|
2010-10-28 22:27:19 +05:30
|
|
|
#define act_tab (G.act_tab)
|
2010-09-26 16:10:05 +05:30
|
|
|
#define n_act (G.n_act )
|
|
|
|
#define evt_tab (G.evt_tab)
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|
|
|
#define n_evt (G.n_evt )
|
|
|
|
#define INIT_G() do { \
|
|
|
|
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
|
|
|
|
} while (0)
|
2008-11-29 14:35:50 +05:30
|
|
|
|
|
|
|
/*
|
|
|
|
* acpid listens to ACPI events coming either in textual form
|
|
|
|
* from /proc/acpi/event (though it is marked deprecated,
|
|
|
|
* it is still widely used and _is_ a standard) or in binary form
|
|
|
|
* from specified evdevs (just use /dev/input/event*).
|
|
|
|
* It parses the event to retrieve ACTION and a possible PARAMETER.
|
|
|
|
* It then spawns /etc/acpi/<ACTION>[/<PARAMETER>] either via run-parts
|
|
|
|
* (if the resulting path is a directory) or directly.
|
|
|
|
* If the resulting path does not exist it logs it via perror
|
|
|
|
* and continues listening.
|
|
|
|
*/
|
|
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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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|
2015-02-23 19:56:47 +05:30
|
|
|
// log the event
|
libbb: reduce the overhead of single parameter bb_error_msg() calls
Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by
Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower
overhead call to bb_perror_msg() when only a string was being printed
with no parameters. This saves space for some CPU architectures because
it avoids the overhead of a call to a variadic function. However there
has never been a simple version of bb_error_msg(), and since 2007 many
new calls to bb_perror_msg() have been added that only take a single
parameter and so could have been using bb_simple_perror_message().
This changeset introduces 'simple' versions of bb_info_msg(),
bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and
bb_herror_msg_and_die(), and replaces all calls that only take a
single parameter, or use something like ("%s", arg), with calls to the
corresponding 'simple' version.
Since it is likely that single parameter calls to the variadic functions
may be accidentally reintroduced in the future a new debugging config
option WARN_SIMPLE_MSG has been introduced. This uses some macro magic
which will cause any such calls to generate a warning, but this is
turned off by default to avoid use of the unpleasant macros in normal
circumstances.
This is a large changeset due to the number of calls that have been
replaced. The only files that contain changes other than simple
substitution of function calls are libbb.h, libbb/herror_msg.c,
libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c,
networking/udhcp/common.h and util-linux/mdev.c additonal macros have
been added for logging so that single parameter and multiple parameter
logging variants exist.
The amount of space saved varies considerably by architecture, and was
found to be as follows (for 'defconfig' using GCC 7.4):
Arm: -92 bytes
MIPS: -52 bytes
PPC: -1836 bytes
x86_64: -938 bytes
Note that for the MIPS architecture only an exception had to be made
disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h)
because it made these files larger on MIPS.
Signed-off-by: James Byrne <james.byrne@origamienergy.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 15:05:03 +05:30
|
|
|
bb_simple_error_msg(event);
|
2008-11-29 14:35:50 +05:30
|
|
|
|
|
|
|
// spawn handler
|
|
|
|
// N.B. run-parts would require scripts to have #!/bin/sh
|
|
|
|
// handler is directory? -> use run-parts
|
|
|
|
// handler is file? -> run it directly
|
|
|
|
if (0 == stat(event, &st))
|
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|
|
spawn((char **)args + (0==(st.st_mode & S_IFDIR)));
|
|
|
|
else
|
|
|
|
bb_simple_perror_msg(event);
|
2010-09-26 16:10:05 +05:30
|
|
|
|
2008-11-29 14:35:50 +05:30
|
|
|
free(handler);
|
|
|
|
}
|
|
|
|
|
2010-09-26 16:10:05 +05:30
|
|
|
static const char *find_action(struct input_event *ev, const char *buf)
|
|
|
|
{
|
|
|
|
const char *action = NULL;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
// map event
|
|
|
|
for (i = 0; i < n_evt; i++) {
|
|
|
|
if (ev) {
|
|
|
|
if (ev->type == evt_tab[i].n_type && ev->code == evt_tab[i].n_code && ev->value == evt_tab[i].value) {
|
|
|
|
action = evt_tab[i].desc;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (buf) {
|
2015-03-12 22:18:34 +05:30
|
|
|
if (is_prefixed_with(evt_tab[i].desc, buf)) {
|
2010-09-26 16:10:05 +05:30
|
|
|
action = evt_tab[i].desc;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// get action
|
|
|
|
if (action) {
|
|
|
|
for (i = 0; i < n_act; i++) {
|
|
|
|
if (strstr(action, act_tab[i].key)) {
|
|
|
|
action = act_tab[i].action;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return action;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void parse_conf_file(const char *filename)
|
|
|
|
{
|
|
|
|
parser_t *parser;
|
|
|
|
char *tokens[2];
|
|
|
|
|
|
|
|
parser = config_open2(filename, fopen_for_read);
|
|
|
|
|
|
|
|
if (parser) {
|
|
|
|
while (config_read(parser, tokens, 2, 2, "# \t", PARSE_NORMAL)) {
|
|
|
|
act_tab = xrealloc_vector(act_tab, 1, n_act);
|
|
|
|
act_tab[n_act].key = xstrdup(tokens[0]);
|
|
|
|
act_tab[n_act].action = xstrdup(tokens[1]);
|
|
|
|
n_act++;
|
|
|
|
}
|
|
|
|
config_close(parser);
|
|
|
|
} else {
|
|
|
|
act_tab = (void*)f_act_tab;
|
|
|
|
n_act = ARRAY_SIZE(f_act_tab);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void parse_map_file(const char *filename)
|
|
|
|
{
|
|
|
|
parser_t *parser;
|
|
|
|
char *tokens[6];
|
|
|
|
|
|
|
|
parser = config_open2(filename, fopen_for_read);
|
|
|
|
|
|
|
|
if (parser) {
|
|
|
|
while (config_read(parser, tokens, 6, 6, "# \t", PARSE_NORMAL)) {
|
|
|
|
evt_tab = xrealloc_vector(evt_tab, 1, n_evt);
|
|
|
|
evt_tab[n_evt].s_type = xstrdup(tokens[0]);
|
|
|
|
evt_tab[n_evt].n_type = xstrtou(tokens[1], 16);
|
|
|
|
evt_tab[n_evt].s_code = xstrdup(tokens[2]);
|
|
|
|
evt_tab[n_evt].n_code = xatou16(tokens[3]);
|
|
|
|
evt_tab[n_evt].value = xatoi_positive(tokens[4]);
|
|
|
|
evt_tab[n_evt].desc = xstrdup(tokens[5]);
|
|
|
|
n_evt++;
|
|
|
|
}
|
|
|
|
config_close(parser);
|
|
|
|
} else {
|
|
|
|
evt_tab = (void*)f_evt_tab;
|
|
|
|
n_evt = ARRAY_SIZE(f_evt_tab);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-11-29 14:35:50 +05:30
|
|
|
/*
|
2010-09-26 16:10:05 +05:30
|
|
|
* acpid [-c conf_dir] [-r conf_file ] [-a map_file ] [-l log_file] [-e proc_event_file]
|
|
|
|
*/
|
2008-11-29 14:35:50 +05:30
|
|
|
|
|
|
|
int acpid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
2010-09-26 16:10:05 +05:30
|
|
|
int acpid_main(int argc UNUSED_PARAM, char **argv)
|
2008-11-29 14:35:50 +05:30
|
|
|
{
|
2010-09-26 16:10:05 +05:30
|
|
|
int nfd;
|
|
|
|
int opts;
|
2008-11-29 14:35:50 +05:30
|
|
|
struct pollfd *pfd;
|
2010-09-26 16:10:05 +05:30
|
|
|
const char *opt_dir = "/etc/acpi";
|
|
|
|
const char *opt_input = "/dev/input/event";
|
2008-11-29 14:35:50 +05:30
|
|
|
const char *opt_logfile = "/var/log/acpid.log";
|
2010-09-26 16:10:05 +05:30
|
|
|
const char *opt_action = "/etc/acpid.conf";
|
|
|
|
const char *opt_map = "/etc/acpi.map";
|
|
|
|
#if ENABLE_FEATURE_PIDFILE
|
2012-12-11 01:19:39 +05:30
|
|
|
const char *opt_pidfile = CONFIG_PID_FILE_PATH "/acpid.pid";
|
2010-09-26 16:10:05 +05:30
|
|
|
#endif
|
|
|
|
|
|
|
|
INIT_G();
|
2008-11-29 14:35:50 +05:30
|
|
|
|
2017-08-09 01:25:02 +05:30
|
|
|
opts = getopt32(argv, "^"
|
|
|
|
"c:de:fl:a:M:"
|
|
|
|
IF_FEATURE_PIDFILE("p:")
|
|
|
|
IF_FEATURE_ACPID_COMPAT("g:m:s:S:v")
|
|
|
|
"\0"
|
|
|
|
"df:e--e",
|
2010-11-23 04:19:10 +05:30
|
|
|
&opt_dir, &opt_input, &opt_logfile, &opt_action, &opt_map
|
|
|
|
IF_FEATURE_PIDFILE(, &opt_pidfile)
|
2010-09-26 16:10:05 +05:30
|
|
|
IF_FEATURE_ACPID_COMPAT(, NULL, NULL, NULL, NULL)
|
2008-11-29 14:35:50 +05:30
|
|
|
);
|
|
|
|
|
2010-09-26 16:10:05 +05:30
|
|
|
if (!(opts & OPT_f)) {
|
2012-01-09 09:31:25 +05:30
|
|
|
/* No -f "Foreground", we go to background */
|
2010-09-26 16:10:05 +05:30
|
|
|
bb_daemonize_or_rexec(DAEMON_CLOSE_EXTRA_FDS, argv);
|
2008-11-29 14:35:50 +05:30
|
|
|
}
|
|
|
|
|
2010-09-26 16:10:05 +05:30
|
|
|
if (!(opts & OPT_d)) {
|
2012-01-09 09:31:25 +05:30
|
|
|
/* No -d "Debug", we log to log file.
|
|
|
|
* This includes any output from children.
|
|
|
|
*/
|
2015-02-23 19:56:47 +05:30
|
|
|
xmove_fd(xopen(opt_logfile, O_WRONLY | O_CREAT | O_APPEND), STDOUT_FILENO);
|
2012-01-09 09:31:25 +05:30
|
|
|
xdup2(STDOUT_FILENO, STDERR_FILENO);
|
|
|
|
/* Also, acpid's messages (but not children) will go to syslog too */
|
2010-09-26 16:10:05 +05:30
|
|
|
openlog(applet_name, LOG_PID, LOG_DAEMON);
|
|
|
|
logmode = LOGMODE_SYSLOG | LOGMODE_STDIO;
|
|
|
|
}
|
2012-01-09 09:31:25 +05:30
|
|
|
/* else: -d "Debug", log is not redirected */
|
2008-11-29 14:35:50 +05:30
|
|
|
|
2010-09-26 16:10:05 +05:30
|
|
|
parse_conf_file(opt_action);
|
|
|
|
parse_map_file(opt_map);
|
2008-11-29 14:35:50 +05:30
|
|
|
|
2010-09-26 16:10:05 +05:30
|
|
|
xchdir(opt_dir);
|
2008-11-29 14:35:50 +05:30
|
|
|
|
2012-02-05 19:38:08 +05:30
|
|
|
/* We spawn children but don't wait for them. Prevent zombies: */
|
2010-09-26 16:10:05 +05:30
|
|
|
bb_signals((1 << SIGCHLD), SIG_IGN);
|
2012-02-05 19:38:08 +05:30
|
|
|
// If you enable this, (1) explain why, (2)
|
|
|
|
// make sure while(poll) loop below is still interruptible
|
|
|
|
// by SIGTERM et al:
|
|
|
|
//bb_signals(BB_FATAL_SIGS, record_signo);
|
2008-11-29 14:35:50 +05:30
|
|
|
|
2010-09-26 16:10:05 +05:30
|
|
|
pfd = NULL;
|
|
|
|
nfd = 0;
|
|
|
|
while (1) {
|
|
|
|
int fd;
|
|
|
|
char *dev_event;
|
2008-11-29 14:35:50 +05:30
|
|
|
|
2012-01-09 09:31:25 +05:30
|
|
|
dev_event = xasprintf((opts & OPT_e) ? "%s" : "%s%u", opt_input, nfd);
|
2010-09-26 16:10:05 +05:30
|
|
|
fd = open(dev_event, O_RDONLY | O_NONBLOCK);
|
|
|
|
if (fd < 0) {
|
|
|
|
if (nfd == 0)
|
|
|
|
bb_simple_perror_msg_and_die(dev_event);
|
|
|
|
break;
|
|
|
|
}
|
2012-01-09 09:31:25 +05:30
|
|
|
free(dev_event);
|
2010-09-26 16:10:05 +05:30
|
|
|
pfd = xrealloc_vector(pfd, 1, nfd);
|
|
|
|
pfd[nfd].fd = fd;
|
|
|
|
pfd[nfd].events = POLLIN;
|
|
|
|
nfd++;
|
2008-11-29 14:35:50 +05:30
|
|
|
}
|
|
|
|
|
2010-09-26 16:10:05 +05:30
|
|
|
write_pidfile(opt_pidfile);
|
2008-11-29 14:35:50 +05:30
|
|
|
|
2012-01-09 09:31:25 +05:30
|
|
|
while (safe_poll(pfd, nfd, -1) > 0) {
|
2010-09-26 16:10:05 +05:30
|
|
|
int i;
|
2008-11-29 14:35:50 +05:30
|
|
|
for (i = 0; i < nfd; i++) {
|
2012-01-09 09:31:25 +05:30
|
|
|
const char *event;
|
|
|
|
|
|
|
|
if (!(pfd[i].revents & POLLIN)) {
|
|
|
|
if (pfd[i].revents == 0)
|
|
|
|
continue; /* this fd has nothing */
|
|
|
|
|
|
|
|
/* Likely POLLERR, POLLHUP, POLLNVAL.
|
|
|
|
* Do not listen on this fd anymore.
|
|
|
|
*/
|
|
|
|
close(pfd[i].fd);
|
|
|
|
nfd--;
|
|
|
|
for (; i < nfd; i++)
|
|
|
|
pfd[i].fd = pfd[i + 1].fd;
|
|
|
|
break; /* do poll() again */
|
|
|
|
}
|
2008-11-29 14:35:50 +05:30
|
|
|
|
2012-01-09 09:31:25 +05:30
|
|
|
event = NULL;
|
2010-09-26 16:10:05 +05:30
|
|
|
if (option_mask32 & OPT_e) {
|
|
|
|
char *buf;
|
|
|
|
int len;
|
2008-11-29 14:35:50 +05:30
|
|
|
|
2011-05-09 00:51:10 +05:30
|
|
|
buf = xmalloc_reads(pfd[i].fd, NULL);
|
2010-09-26 16:10:05 +05:30
|
|
|
/* buf = "button/power PWRB 00000080 00000000" */
|
|
|
|
len = strlen(buf) - 9;
|
|
|
|
if (len >= 0)
|
|
|
|
buf[len] = '\0';
|
|
|
|
event = find_action(NULL, buf);
|
2012-01-09 09:31:25 +05:30
|
|
|
free(buf);
|
2010-09-26 16:10:05 +05:30
|
|
|
} else {
|
2012-01-09 09:31:25 +05:30
|
|
|
struct input_event ev;
|
|
|
|
|
2010-09-26 16:10:05 +05:30
|
|
|
if (sizeof(ev) != full_read(pfd[i].fd, &ev, sizeof(ev)))
|
|
|
|
continue;
|
2008-11-29 14:35:50 +05:30
|
|
|
|
2010-09-26 16:10:05 +05:30
|
|
|
if (ev.value != 1 && ev.value != 0)
|
|
|
|
continue;
|
2008-11-29 14:35:50 +05:30
|
|
|
|
2010-09-26 16:10:05 +05:30
|
|
|
event = find_action(&ev, NULL);
|
2008-11-29 14:35:50 +05:30
|
|
|
}
|
|
|
|
if (!event)
|
|
|
|
continue;
|
2012-02-05 19:38:08 +05:30
|
|
|
/* spawn event handler */
|
2008-11-29 14:35:50 +05:30
|
|
|
process_event(event);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ENABLE_FEATURE_CLEAN_UP) {
|
2012-01-09 09:31:25 +05:30
|
|
|
while (nfd--)
|
|
|
|
close(pfd[nfd].fd);
|
2008-11-29 14:35:50 +05:30
|
|
|
free(pfd);
|
|
|
|
}
|
2010-09-26 16:10:05 +05:30
|
|
|
remove_pidfile(opt_pidfile);
|
2008-11-29 14:35:50 +05:30
|
|
|
|
|
|
|
return EXIT_SUCCESS;
|
|
|
|
}
|