#include "global.h"
cfg_root_t cfg;
sched_root_task_t *root;
int Kill, gpio, flg, maxpins, defact, resbut, led = -1;
extern char compiled[], compiledby[], compilehost[];
char szCfgName[PATH_MAX] = BUTZ_CFG;
char szDevName[PATH_MAX] = _PATH_DEVGPIOC"0";
static void
Usage()
{
printf( " -= Butz =- Service for board buttons management\n"
"=== %s === %s@%s ===\n\n"
" Syntax: butz [options] [set_value]\n"
"\n"
"\t-c <cfgfile>\tConfig file [default: /etc/butz.conf]\n"
"\t-d <devname>\tGPIO control device [default: /dev/gpioc]\n"
"\n", compiled, compiledby, compilehost);
}
static int
prepareGPIO()
{
const char *str;
struct gpio_pin pin;
struct gpio_req req;
str = cfg_getAttribute(&cfg, "reset", "default_after");
if (str)
defact = strtol(str, NULL, 0);
str = cfg_getAttribute(&cfg, "reset", "gpio_led_ping");
if (str)
led = strtol(str, NULL, 0);
str = cfg_getAttribute(&cfg, "reset", "gpio_pin");
if (!str || maxpins < (resbut = strtol(str, NULL, 0))) {
EERROR(EINVAL, "Reset button pin not defined or wrong number!");
return -1;
}
/* switch button pin into input state */
pin.gp_pin = resbut;
pin.gp_flags = GPIO_PIN_INPUT;
if (ioctl(gpio, GPIOSETCONFIG, &pin) == -1)
return -1;
/* toggle led pin */
if (led != -1) {
req.gp_pin = led;
if (ioctl(gpio, GPIOTOGGLE, &req) == -1) {
ESYSERR(0);
return -1;
}
}
return 0;
}
static void *
sigHandler(sched_task_t *task)
{
switch (TASK_VAL(task)) {
case SIGHUP:
cfgUnloadConfig(&cfg);
if (cfgLoadConfig(szCfgName, &cfg)) {
ELIBERR(cfg);
Kill++;
}
if (prepareGPIO())
Kill++;
break;
case SIGTERM:
Kill++;
break;
default:
EERROR(EINVAL, "Undefined signal %lu!", TASK_VAL(task));
break;
}
taskExit(task, NULL);
}
static void *
execReset(sched_task_t *task)
{
pid_t pid;
const char *str;
str = cfg_getAttribute(&cfg, "reset", "click");
if (!str)
taskExit(task, NULL);
if ((pid = fork()) == -1)
ESYSERR(0);
else if (!pid) {
execl(str, str, "click", NULL);
ESYSERR(0);
_exit(127);
}
flg ^= flg;
taskExit(task, NULL);
}
static void *
execDefault(sched_task_t *task)
{
pid_t pid;
const char *str;
str = cfg_getAttribute(&cfg, "reset", "default");
if (!str)
taskExit(task, NULL);
if ((pid = fork()) == -1)
ESYSERR(0);
else if (!pid) {
execl(str, str, "default", NULL);
ESYSERR(0);
_exit(127);
}
flg ^= flg;
taskExit(task, NULL);
}
static void *
butReset(sched_task_t *task)
{
struct timespec ts = { 1, 0 };
struct gpio_req req;
/* check reset button */
req.gp_pin = resbut;
if (ioctl(gpio, GPIOGET, &req) == -1) {
ESYSERR(0);
goto end;
}
/* switch on */
if (flg != -1 && !req.gp_value)
if (++flg == 1)
schedSuspend(TASK_ROOT(task), execReset, NULL, flg, NULL, 0);
if (defact && flg >= defact) {
schedCancelby(TASK_ROOT(task), taskSUSPEND, CRITERIA_CALL, execReset, NULL);
schedEvent(TASK_ROOT(task), execDefault, NULL, flg, NULL, 0);
flg = -1;
goto end;
}
if (flg > 0 && req.gp_value)
schedResumeby(TASK_ROOT(task), CRITERIA_ID, (void*) 1);
/* toggle led pin */
if (flg != -1 && led != -1) {
req.gp_pin = led;
if (ioctl(gpio, GPIOTOGGLE, &req) == -1)
ESYSERR(0);
}
end:
schedTimer(TASK_ROOT(task), TASK_FUNC(task), TASK_ARG(task),
ts, TASK_DATA(task), TASK_DATLEN(task));
taskExit(task, NULL);
}
int
main(int argc, char **argv)
{
char ch;
pid_t pid;
struct timespec ts = { 1, 0 };
while ((ch = getopt(argc, argv, "hc:d:")) != -1)
switch (ch) {
case 'd':
strlcpy(szDevName, optarg, sizeof szDevName);
break;
case 'c':
strlcpy(szCfgName, optarg, sizeof szCfgName);
break;
case 'h':
default:
Usage();
return 1;
}
argc -= optind;
argv += optind;
switch ((pid = fork())) {
case -1:
printf("Error:: failed fork() #%d - %s\n", errno, strerror(errno));
return 1;
case 0:
setsid();
chdir("/");
gpio = open(_PATH_DEVNULL, O_RDWR);
if (gpio > 2) {
dup2(gpio, STDIN_FILENO);
dup2(gpio, STDOUT_FILENO);
dup2(gpio, STDERR_FILENO);
close(gpio);
}
break;
default:
return 0;
}
openlog("butz", LOG_PID | LOG_CONS, LOG_DAEMON);
gpio = open(szDevName, O_RDONLY);
if (gpio == -1) {
ESYSERR(0);
return 1;
}
if (ioctl(gpio, GPIOMAXPIN, &maxpins) == -1) {
ESYSERR(0);
return 1;
}
if (cfgLoadConfig(szCfgName, &cfg)) {
ELIBERR(cfg);
close(gpio);
return 1;
}
if (prepareGPIO()) {
close(gpio);
return 1;
}
root = schedBegin();
if (!root) {
ELIBERR(sched);
close(gpio);
return 1;
}
schedSignal(root, sigHandler, NULL, SIGHUP, NULL, 0);
schedSignal(root, sigHandler, NULL, SIGTERM, NULL, 0);
schedTimer(root, butReset, NULL, ts, NULL, 0);
schedRun(root, &Kill);
schedEnd(&root);
cfgUnloadConfig(&cfg);
close(gpio);
closelog();
return 0;
}
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>