razzor/alix-usv
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refactoring, restart with SIGHUP

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This commit is contained in:
Olaf Rempel 2009-05-03 16:16:56 +02:00
parent 3a379757b6
commit d8a80d24b9
8 changed files with 639 additions and 342 deletions
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3
daemon/Makefile
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@ -6,7 +6,8 @@ CFLAGS = -Wall -O2 -MD -MP -MF $(*F).d
# ------
SRC1 := alix-usv.c logging.c unixsocket.c
SRC2 := alix-usvd.c configfile.c event.c logging.c pidfile.c unixsocket.c
SRC2 := alix-usvd.c configfile.c event.c logging.c pidfile.c signals.c unixsocket.c
SRC2 += usvdevice.c usvstate.c
all: $(TARGET1) $(TARGET2)

369
daemon/alix-usvd.c
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@ -20,61 +20,21 @@
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdint.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "i2c-dev.h"
#include <signal.h>
#include "configfile.h"
#include "event.h"
#include "logging.h"
#include "pidfile.h"
#include "unixsocket.h"
/* eeprom parameters / thresholds & defaults */
#include "../eeprom.h"
#include "signals.h"
#include "usvdevice.h"
#include "usvstate.h"
#define DEFAULT_CONFIG "alix-usvd.conf"
#define DEFAULT_LOGFILE "alix-usvd.log"
#define DEFAULT_PIDFILE "alix-usvd.pid"
#define DEFAULT_SOCKET "alix-usvd.sock"
#define SENDMAIL "/usr/sbin/sendmail -t"
enum {
REG_STATUS = 0x00,
REG_CURRENT = 0x10,
REG_UBAT = 0x11,
REG_UIN = 0x12,
REG_UIN_LOSS = 0x20,
REG_UIN_RESTORE = 0x21,
REG_UBAT_FULL = 0x22,
REG_UBAT_LOW = 0x23,
REG_UBAT_CRIT = 0x24,
REG_IBAT_FULL = 0x25,
REG_CRC = 0x26,
};
enum {
STATE_IDLE = 0x01,
STATE_TEST = 0x02,
STATE_CHARGE = 0x04,
STATE_DISCHARGE = 0x08,
STATE_POWEROFF = 0x10,
};
enum {
I2CDEV_ERR = -1,
I2CDEV_UNKNOWN = 0,
I2CDEV_OK = 1,
};
static struct option opts[] = {
{"nofork", 0, 0, 'd'},
@ -83,288 +43,6 @@ static struct option opts[] = {
{0, 0, 0, 0}
};
static int i2cdev_open(const char *i2c_device, int i2c_address)
{
int fd = open(i2c_device, O_RDWR);
if (fd < 0)
return -1;
unsigned long funcs;
if (ioctl(fd, I2C_FUNCS, &funcs)) {
close(fd);
return -1;
}
if ((funcs & I2C_FUNC_SMBUS_WORD_DATA) != I2C_FUNC_SMBUS_WORD_DATA) {
close(fd);
return -1;
}
if (ioctl(fd, I2C_SLAVE, i2c_address) < 0) {
close(fd);
return -1;
}
return fd;
}
static int alix_open(void)
{
static const char *i2c_device;
static int i2c_address;
static int i2c_status = I2CDEV_UNKNOWN;
if (i2c_device == NULL) {
i2c_device = config_get_string("global", "i2c-device", "/dev/i2c-0");
i2c_address = config_get_int("global", "i2c-address" , 16);
}
int dev = i2cdev_open(i2c_device, i2c_address);
if (dev < 0) {
if (i2c_status != I2CDEV_ERR)
log_print(LOG_WARN, "failed to open %s:0x%02x", i2c_device, i2c_address);
i2c_status = I2CDEV_ERR;
return -1;
}
if (i2c_status != I2CDEV_OK)
log_print(LOG_INFO, "successfully opened %s:0x%02x", i2c_device, i2c_address);
i2c_status = I2CDEV_OK;
return dev;
}
static int check_thresholds(void)
{
int dev = alix_open();
if (dev < 0)
return -1;
struct ee_param defaults = DEFAULT_PARAMETERS;
struct ee_param config;
config.uin_loss = config_get_int("thresholds", "uin_loss" , defaults.uin_loss);
config.uin_restore = config_get_int("thresholds", "uin_restore" , defaults.uin_restore);
config.ubat_full = config_get_int("thresholds", "ubat_full" , defaults.ubat_full);
config.ubat_low = config_get_int("thresholds", "ubat_low" , defaults.ubat_low);
config.ubat_critical = config_get_int("thresholds", "ubat_critical" , defaults.ubat_critical);
config.ibat_full = config_get_int("thresholds", "ibat_full" , defaults.ibat_full);
struct ee_param device;
device.uin_loss = i2c_smbus_read_word_data(dev, REG_UIN_LOSS);
device.uin_restore = i2c_smbus_read_word_data(dev, REG_UIN_RESTORE);
device.ubat_full = i2c_smbus_read_word_data(dev, REG_UBAT_FULL);
device.ubat_low = i2c_smbus_read_word_data(dev, REG_UBAT_LOW);
device.ubat_critical = i2c_smbus_read_word_data(dev, REG_UBAT_CRIT);
device.ibat_full = i2c_smbus_read_word_data(dev, REG_IBAT_FULL);
device.crc16 = 0x0000;
int changed = 0;
if (device.uin_loss != config.uin_loss) {
log_print(LOG_INFO, "update UIN_LOSS: %d => %d", device.uin_loss, config.uin_loss);
i2c_smbus_write_word_data(dev, REG_UIN_LOSS, config.uin_loss);
changed = 1;
}
if (device.uin_restore != config.uin_restore) {
log_print(LOG_INFO, "update UIN_RESTORE: %d => %d", device.uin_restore, config.uin_restore);
i2c_smbus_write_word_data(dev, REG_UIN_RESTORE, config.uin_restore);
changed = 1;
}
if (device.ubat_full != config.ubat_full) {
log_print(LOG_INFO, "update UBAT_FULL: %d => %d", device.ubat_full, config.ubat_full);
i2c_smbus_write_word_data(dev, REG_UBAT_FULL, config.ubat_full);
changed = 1;
}
if (device.ubat_low != config.ubat_low) {
log_print(LOG_INFO, "update UBAT_LOW: %d => %d", device.ubat_low, config.ubat_low);
i2c_smbus_write_word_data(dev, REG_UBAT_LOW, config.ubat_low);
changed = 1;
}
if (device.ubat_critical != config.ubat_critical) {
log_print(LOG_INFO, "update UBAT_CRIT: %d => %d", device.ubat_critical, config.ubat_critical);
i2c_smbus_write_word_data(dev, REG_UBAT_CRIT, config.ubat_critical);
changed = 1;
}
if (device.ibat_full != config.ibat_full) {
log_print(LOG_INFO, "update IBAT_FULL: %d => %d", device.ibat_full, config.ibat_full);
i2c_smbus_write_word_data(dev, REG_IBAT_FULL, config.ibat_full);
changed = 1;
}
if (changed == 1)
i2c_smbus_write_word_data(dev, REG_CRC, 0x0000);
close(dev);
return changed;
}
static char * state2str(int state)
{
switch (state) {
case STATE_IDLE:
return "IDLE";
case STATE_TEST:
return "TEST";
case STATE_CHARGE:
return "CHARGE";
case STATE_DISCHARGE:
return "DISCHARGE";
case STATE_POWEROFF:
return "POWEROFF";
default:
return "UNKNOWN";
}
}
static int str2state(char *buf)
{
int state = -1;
if (strncasecmp(buf, "IDLE", 4) == 0)
state = STATE_IDLE;
else if (strncasecmp(buf, "TEST", 4) == 0)
state = STATE_TEST;
else if (strncasecmp(buf, "CHARGE", 6) == 0)
state = STATE_CHARGE;
else if (strncasecmp(buf, "DISCHARGE", 9) == 0)
state = STATE_DISCHARGE;
else if (strncasecmp(buf, "POWEROFF", 8) == 0)
state = STATE_POWEROFF;
return state;
}
static int alix_state = -1;
static void alix_state_change(int old_state, int new_state)
{
static const char *mail_from;
static const char *mail_to;
static int mail_data;
if (mail_data == 0) {
mail_from = config_get_string("alerts", "mail-from", NULL);
mail_to = config_get_string("alerts", "mail-to", NULL);
mail_data = 1;
}
log_print(LOG_INFO, "usv state changed: %s => %s", state2str(old_state), state2str(new_state));
if (mail_to == NULL)
return;
FILE *mail = popen(SENDMAIL, "w");
if (mail == NULL)
return;
fprintf(mail, "From: %s\n", mail_from);
fprintf(mail, "To: %s\n", mail_to);
fprintf(mail, "Subject: alix-usvd state change: %s => %s\n\n",
state2str(old_state), state2str(new_state));
fprintf(mail, "Faithfully yours, etc.\n");
fclose(mail);
return;
}
static int unix_read_cb(int fd, void *privdata)
{
char buf[64];
int len = read(fd, buf, sizeof(buf));
if (len < 0)
return -1;
int dev = alix_open();
if (dev < 0)
return 0;
int new_state = str2state(buf);
if (new_state != -1) {
if (i2c_smbus_write_word_data(dev, REG_STATUS, new_state) == 0) {
alix_state_change(alix_state, new_state);
alix_state = new_state;
}
int len = snprintf(buf, sizeof(buf), "%s", state2str(alix_state));
write(fd, buf, len);
} else if (strncasecmp(buf, "status", 6) == 0) {
new_state = i2c_smbus_read_word_data(dev, REG_STATUS);
int adc_ibat = i2c_smbus_read_word_data(dev, REG_CURRENT);
int adc_ubat = i2c_smbus_read_word_data(dev, REG_UBAT);
int adc_uin = i2c_smbus_read_word_data(dev, REG_UIN);
if (new_state < 0 || adc_ibat < 0 || adc_ubat < 0 || adc_uin < 0) {
new_state = -1;
adc_ibat = 0;
adc_ubat = 0;
adc_uin = 0;
} else if (new_state != alix_state) {
alix_state_change(alix_state, new_state);
alix_state = new_state;
}
int len = snprintf(buf, sizeof(buf), "%s:%d:%d:%d",
state2str(new_state),
(int16_t)adc_ibat, adc_ubat, adc_uin);
write(fd, buf, len);
}
close(dev);
close(fd);
return -1;
}
static int unix_accept_cb(int fd, void *privdata)
{
int con = accept(fd, NULL, NULL);
if (con < 0) {
log_print(LOG_ERROR, "unix_accept_cb: accept()");
return 0;
}
event_add_readfd(NULL, con, unix_read_cb, NULL);
return 0;
}
static int status_interval(void *privdata)
{
int dev = alix_open();
if (dev < 0)
return 0;
int new_state = i2c_smbus_read_word_data(dev, REG_STATUS);
if (new_state == -1) {
log_print(LOG_WARN, "failed to get status from i2c-device");
return 0;
}
if (new_state != alix_state) {
alix_state_change(alix_state, new_state);
alix_state = new_state;
}
close(dev);
return 0;
}
int main(int argc, char *argv[])
{
char *config = DEFAULT_CONFIG;
@ -405,7 +83,7 @@ int main(int argc, char *argv[])
if (config_parse(config) < 0)
exit(1);
if (debug == 0) {
if (!debug) {
/* check pidfile */
const char *pidfile = config_get_string("global", "pidfile", DEFAULT_PIDFILE);
if (pidfile_check(pidfile, 1) != 0) {
@ -430,24 +108,33 @@ int main(int argc, char *argv[])
log_print(LOG_INFO, "alix-usvd started (pid: %d)", getpid());
const char *socket_path = config_get_string("global", "socket", DEFAULT_SOCKET);
int sockfd = unix_listen(socket_path);
if (sockfd < 0)
exit(1);
signal_init();
signal_set_callback(SIGHUP, event_loop_break);
event_add_readfd(NULL, sockfd, unix_accept_cb, NULL);
while (1) {
if (usvdev_init() < 0)
break;
int interval = config_get_int("global", "check-interval", 60);
struct timeval tv = { .tv_sec = interval, .tv_usec = 0 };
event_add_timeout(&tv, status_interval, NULL);
if (usvstate_init() < 0)
break;
int tmp = check_thresholds();
if (tmp < 0)
log_print(LOG_WARN, "unable to check thresholds");
event_loop();
else if (tmp == 1)
log_print(LOG_INFO, "updated thresholds");
usvstate_close();
log_close();
config_free();
if (config_parse(config) < 0)
break;
const char *logfile = config_get_string("global", "logfile", DEFAULT_LOGFILE);
if (!debug && log_init(logfile) < 0)
break;
log_print(LOG_INFO, "alix-usvd restarted (pid: %d)", getpid());
}
event_loop();
return 0;
}

149
daemon/signals.c Normal file
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@ -0,0 +1,149 @@
/***************************************************************************
* Copyright (C) 05/2009 by Olaf Rempel *
* razzor@kopf-tisch.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; version 2 of the License *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include "event.h"
#include "list.h"
#include "logging.h"
#include "signals.h"
struct signal_entry {
struct list_head list;
int signum;
int deleted;
void (*callback)(void);
};
static LIST_HEAD(callback_list);
static int sig_pipe[2];
static void sig_handler(int signal)
{
unsigned char signum = (signal & 0xFF);
write(sig_pipe[1], &signum, 1);
}
int signal_remove_callback(int signum, int type)
{
/* mark all old handler for deletion */
struct signal_entry *search;
list_for_each_entry(search, &callback_list, list) {
if (search->signum == signum)
search->deleted = 1;
}
struct sigaction sig_action;
switch (type) {
case SIG_IGNORE:
sig_action.sa_handler = SIG_IGN;
break;
default:
case SIG_DEFAULT:
sig_action.sa_handler = SIG_DFL;
break;
}
if (sigaction(signum, &sig_action, NULL) < 0) {
log_print(LOG_WARN, "signal_remove_callback(): sigaction()");
return -1;
}
/* trigger remove */
sig_handler(0);
return 0;
}
int signal_set_callback(int signum, void (*callback)(void))
{
struct signal_entry *entry = malloc(sizeof(struct signal_entry));
if (entry == NULL) {
log_print(LOG_WARN, "signal_add_callback(): out of memory");
return -1;
}
entry->signum = signum;
entry->deleted = 0;
entry->callback = callback;
list_add_tail(&entry->list, &callback_list);
struct sigaction sig_action = {
.sa_handler = sig_handler,
};
if (sigaction(signum, &sig_action, NULL) < 0) {
log_print(LOG_WARN, "signal_add_callback(): sigaction()");
list_del(&entry->list);
free(entry);
return -1;
}
return 0;
}
static int sig_event(int fd, void *privdata)
{
unsigned char signum;
int len = read(fd, &signum, 1);
if (len <= 0) {
log_print(LOG_WARN, "sig_event(): read()");
return -1;
}
struct signal_entry *search, *tmp;
list_for_each_entry_safe(search, tmp, &callback_list, list) {
if (search->deleted) {
list_del(&search->list);
free(search);
continue;
}
if (search->signum == signum)
search->callback();
}
return 0;
}
int signal_init(void)
{
if (pipe(sig_pipe) < 0) {
log_print(LOG_ERROR, "signal_init(): pipe()");
return -1;
}
if (fcntl(sig_pipe[0], F_SETFD, FD_CLOEXEC) < 0) {
log_print(LOG_WARN, "signal_init(): fcntl(FD_CLOEXEC)");
return -1;
}
if (fcntl(sig_pipe[1], F_SETFD, FD_CLOEXEC) < 0) {
log_print(LOG_WARN, "signal_init(): fcntl(FD_CLOEXEC)");
return -1;
}
event_add_readfd(NULL, sig_pipe[0], sig_event, NULL);
return 0;
}

12
daemon/signals.h Normal file
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@ -0,0 +1,12 @@
#ifndef _SIGNALS_H
#define _SIGNALS_H
#define SIG_DEFAULT 0x00
#define SIG_IGNORE 0x01
int signal_remove_callback(int signum, int type);
int signal_set_callback(int signum, void (*callback)(void));
int signal_init(void);
#endif // _SIGNALS_H

211
daemon/usvdevice.c Normal file
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@ -0,0 +1,211 @@
/***************************************************************************
* Copyright (C) 05/2009 by Olaf Rempel *
* razzor@kopf-tisch.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; version 2 of the License *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <unistd.h>
#include <stdint.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "i2c-dev.h"
#include "configfile.h"
#include "logging.h"
#include "usvdevice.h"
/* eeprom parameters / thresholds & defaults */
#include "../eeprom.h"
enum {
REG_STATUS = 0x00,
REG_CURRENT = 0x10,
REG_UBAT = 0x11,
REG_UIN = 0x12,
REG_UIN_LOSS = 0x20,
REG_UIN_RESTORE = 0x21,
REG_UBAT_FULL = 0x22,
REG_UBAT_LOW = 0x23,
REG_UBAT_CRIT = 0x24,
REG_IBAT_FULL = 0x25,
REG_CRC = 0x26,
};
static const char *i2c_device;
static int i2c_address;
static int _usvdev_open(void)
{
int fd = open(i2c_device, O_RDWR);
if (fd < 0)
return -1;
unsigned long funcs;
if (ioctl(fd, I2C_FUNCS, &funcs)) {
close(fd);
return -1;
}
if ((funcs & I2C_FUNC_SMBUS_WORD_DATA) != I2C_FUNC_SMBUS_WORD_DATA) {
close(fd);
return -1;
}
if (ioctl(fd, I2C_SLAVE, i2c_address) < 0) {
close(fd);
return -1;
}
return fd;
}
static int usvdev_open(void)
{
static int failcnt = 0;
int dev = _usvdev_open();
if (dev < 0) {
if (failcnt++ == 0)
log_print(LOG_WARN, "failed to open %s:0x%02x", i2c_device, i2c_address);
return -1;
}
if (failcnt != 0) {
log_print(LOG_WARN, "opened %s:0x%02x after %d failed attempts",
i2c_device, i2c_address, failcnt);
failcnt = 0;
}
return dev;
}
int usvdev_getstatus(struct usvdev_status *status)
{
int dev = usvdev_open();
if (dev < 0)
return -1;
status->state = i2c_smbus_read_word_data(dev, REG_STATUS);
status->ibat = i2c_smbus_read_word_data(dev, REG_CURRENT);
status->ubat = i2c_smbus_read_word_data(dev, REG_UBAT);
status->uin = i2c_smbus_read_word_data(dev, REG_UIN);
close(dev);
if (status->state < 0 || status->ibat < 0 || status->ubat < 0 || status->uin < 0) {
status->state = -1;
status->ibat = 0;
status->ubat = 0;
status->uin = 0;
return -1;
}
return 0;
}
int usvdev_setstate(int state)
{
int dev = usvdev_open();
if (dev < 0)
return -1;
int retval = i2c_smbus_write_word_data(dev, REG_STATUS, state);
close(dev);
return retval;
}
int usvdev_init(void)
{
i2c_device = config_get_string("global", "i2c-device", "/dev/i2c-0");
i2c_address = config_get_int("global", "i2c-address" , 16);
int dev = usvdev_open();
if (dev < 0) {
log_print(LOG_WARN, "could not check thresholds");
return 0;
}
struct ee_param defaults = DEFAULT_PARAMETERS;
struct ee_param config;
config.uin_loss = config_get_int("thresholds", "uin_loss" , defaults.uin_loss);
config.uin_restore = config_get_int("thresholds", "uin_restore" , defaults.uin_restore);
config.ubat_full = config_get_int("thresholds", "ubat_full" , defaults.ubat_full);
config.ubat_low = config_get_int("thresholds", "ubat_low" , defaults.ubat_low);
config.ubat_critical = config_get_int("thresholds", "ubat_critical" , defaults.ubat_critical);
config.ibat_full = config_get_int("thresholds", "ibat_full" , defaults.ibat_full);
struct ee_param device;
device.uin_loss = i2c_smbus_read_word_data(dev, REG_UIN_LOSS);
device.uin_restore = i2c_smbus_read_word_data(dev, REG_UIN_RESTORE);
device.ubat_full = i2c_smbus_read_word_data(dev, REG_UBAT_FULL);
device.ubat_low = i2c_smbus_read_word_data(dev, REG_UBAT_LOW);
device.ubat_critical = i2c_smbus_read_word_data(dev, REG_UBAT_CRIT);
device.ibat_full = i2c_smbus_read_word_data(dev, REG_IBAT_FULL);
device.crc16 = 0x0000;
int changed = 0;
if (device.uin_loss != config.uin_loss) {
log_print(LOG_INFO, "update UIN_LOSS: %d => %d", device.uin_loss, config.uin_loss);
i2c_smbus_write_word_data(dev, REG_UIN_LOSS, config.uin_loss);
changed = 1;
}
if (device.uin_restore != config.uin_restore) {
log_print(LOG_INFO, "update UIN_RESTORE: %d => %d", device.uin_restore, config.uin_restore);
i2c_smbus_write_word_data(dev, REG_UIN_RESTORE, config.uin_restore);
changed = 1;
}
if (device.ubat_full != config.ubat_full) {
log_print(LOG_INFO, "update UBAT_FULL: %d => %d", device.ubat_full, config.ubat_full);
i2c_smbus_write_word_data(dev, REG_UBAT_FULL, config.ubat_full);
changed = 1;
}
if (device.ubat_low != config.ubat_low) {
log_print(LOG_INFO, "update UBAT_LOW: %d => %d", device.ubat_low, config.ubat_low);
i2c_smbus_write_word_data(dev, REG_UBAT_LOW, config.ubat_low);
changed = 1;
}
if (device.ubat_critical != config.ubat_critical) {
log_print(LOG_INFO, "update UBAT_CRIT: %d => %d", device.ubat_critical, config.ubat_critical);
i2c_smbus_write_word_data(dev, REG_UBAT_CRIT, config.ubat_critical);
changed = 1;
}
if (device.ibat_full != config.ibat_full) {
log_print(LOG_INFO, "update IBAT_FULL: %d => %d", device.ibat_full, config.ibat_full);
i2c_smbus_write_word_data(dev, REG_IBAT_FULL, config.ibat_full);
changed = 1;
}
if (changed == 1) {
i2c_smbus_write_word_data(dev, REG_CRC, 0x0000);
log_print(LOG_INFO, "committing threshold changes");
}
close(dev);
return 0;
}

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daemon/usvdevice.h Normal file
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#ifndef _USVDEVICE_H_
#define _USVDEVICE_H_
struct usvdev_status {
int state;
int ibat;
int ubat;
int uin;
};
int usvdev_getstatus(struct usvdev_status *status);
int usvdev_setstate(int state);
int usvdev_init(void);
#endif // _USVDEVICE_H_

215
daemon/usvstate.c Normal file
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/***************************************************************************
* Copyright (C) 05/2009 by Olaf Rempel *
* razzor@kopf-tisch.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; version 2 of the License *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include "configfile.h"
#include "event.h"
#include "logging.h"
#include "unixsocket.h"
#include "usvdevice.h"
#define DEFAULT_SOCKET "alix-usvd.sock"
#define SENDMAIL "/usr/sbin/sendmail -t"
enum {
STATE_IDLE = 0x01,
STATE_TEST = 0x02,
STATE_CHARGE = 0x04,
STATE_DISCHARGE = 0x08,
STATE_POWEROFF = 0x10,
};
static struct event_fd *listen_event;
static struct event_timeout *timeout_event;
static const char *mail_from;
static const char *mail_to;
static char * state2str(int state)
{
switch (state) {
case STATE_IDLE:
return "IDLE";
case STATE_TEST:
return "TEST";
case STATE_CHARGE:
return "CHARGE";
case STATE_DISCHARGE:
return "DISCHARGE";
case STATE_POWEROFF:
return "POWEROFF";
default:
return "UNKNOWN";
}
}
static int str2state(char *buf)
{
int state = -1;
if (strncasecmp(buf, "IDLE", 4) == 0)
state = STATE_IDLE;
else if (strncasecmp(buf, "TEST", 4) == 0)
state = STATE_TEST;
else if (strncasecmp(buf, "CHARGE", 6) == 0)
state = STATE_CHARGE;
else if (strncasecmp(buf, "DISCHARGE", 9) == 0)
state = STATE_DISCHARGE;
else if (strncasecmp(buf, "POWEROFF", 8) == 0)
state = STATE_POWEROFF;
return state;
}
static int usvstate_update(int state, struct usvdev_status *status)
{
static int old_state = -1;
if (status == NULL) {
if (state != old_state)
log_print(LOG_INFO, "usv state forced to: %s", state2str(state));
old_state = state;
return state;
}
state = status->state;
if (state == old_state)
return state;
log_print(LOG_INFO, "usv state changed: %s => %s", state2str(old_state), state2str(state));
if (mail_to != NULL) {
FILE *mail = popen(SENDMAIL, "w");
if (mail == NULL) {
fprintf(mail, "From: %s\n", mail_from);
fprintf(mail, "To: %s\n", mail_to);
fprintf(mail, "Subject: alix-usvd state change: %s => %s\n\n",
state2str(old_state), state2str(state));
fprintf(mail, "Current USV status:\n");
fprintf(mail, "Ibat: %1.3lf mA\nUbat: %2.3lf V\nUin : %2.3lf V\n\n",
status->ibat / 1000.0, status->ubat / 1000.0, status->uin / 1000.0);
fprintf(mail, "Faithfully yours, etc.\n");
fclose(mail);
}
}
return state;
}
static int unix_read_cb(int fd, void *privdata)
{
char buf[64];
int len = read(fd, buf, sizeof(buf));
if (len < 0)
return -1;
int new_state = str2state(buf);
if (new_state != -1) {
usvdev_setstate(new_state);
new_state = usvstate_update(new_state, NULL);
int len = snprintf(buf, sizeof(buf), "%s", state2str(new_state));
write(fd, buf, len);
} else if (strncasecmp(buf, "status", 6) == 0) {
struct usvdev_status status;
if (usvdev_getstatus(&status) == 0)
usvstate_update(-1, &status);
int len = snprintf(buf, sizeof(buf), "%s:%d:%d:%d",
state2str(status.state),
(signed)status.ibat, status.ubat, status.uin);
write(fd, buf, len);
}
close(fd);
return -1;
}
static int status_interval(void *privdata)
{
struct usvdev_status status;
if (usvdev_getstatus(&status) < 0)
return 0;
usvstate_update(-1, &status);
return 0;
}
static int unix_accept_cb(int fd, void *privdata)
{
int con = accept(fd, NULL, NULL);
if (con < 0) {
log_print(LOG_ERROR, "unix_accept_cb: accept()");
return 0;
}
event_add_readfd(NULL, con, unix_read_cb, NULL);
return 0;
}
int usvstate_init(void)
{
const char *socket_path = config_get_string("global", "socket", DEFAULT_SOCKET);
int sockfd = unix_listen(socket_path);
if (sockfd < 0)
return -1;
listen_event = event_add_readfd(NULL, sockfd, unix_accept_cb, NULL);
if (listen_event == NULL) {
close(sockfd);
return -1;
}
int interval = config_get_int("global", "check-interval", 60);
struct timeval tv = { .tv_sec = interval, .tv_usec = 0 };
timeout_event = event_add_timeout(&tv, status_interval, NULL);
mail_from = config_get_string("alerts", "mail-from", NULL);
mail_to = config_get_string("alerts", "mail-to", NULL);
usvstate_update(-1, NULL);
return 0;
}
int usvstate_close(void)
{
event_remove_timeout(timeout_event);
event_remove_fd(listen_event);
close(event_get_fd(listen_event));
return 0;
}

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#ifndef _USVSTATE_H_
#define _USVSTATE_H_
int usvstate_init(void);
int usvstate_close(void);
#endif // _USVSTATE_H_