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/*
* Copyright (C) 2013 Paul Kocialkowski <contact@paulk.fr>
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdint.h>
#include <fcntl.h>
#include <errno.h>
#include <dirent.h>
#include <linux/ioctl.h>
#include <linux/input.h>
#define LOG_TAG "piranha_sensors"
#include <utils/Log.h>
#include "piranha_sensors.h"
static int64_t timestamp(struct timeval *time)
{
if (time == NULL)
return -1;
return (int64_t) (time->tv_sec * 1000000000LL + time->tv_usec * 1000);
}
int64_t input_timestamp(struct input_event *event)
{
if (event == NULL)
return -1;
return timestamp(&event->time);
}
int input_open(char *name)
{
DIR *d;
struct dirent *di;
char input_name[80] = { 0 };
char path[PATH_MAX];
char *c;
int fd;
int rc;
if (name == NULL)
return -EINVAL;
d = opendir("/dev/input");
if (d == NULL)
return -1;
while ((di = readdir(d))) {
if (di == NULL || strcmp(di->d_name, ".") == 0 || strcmp(di->d_name, "..") == 0)
continue;
snprintf(path, PATH_MAX, "/dev/input/%s", di->d_name);
fd = open(path, O_RDONLY | O_NONBLOCK);
if (fd < 0)
continue;
rc = ioctl(fd, EVIOCGNAME(sizeof(input_name) - 1), &input_name);
if (rc < 0)
continue;
c = strstr((char *) &input_name, "\n");
if (c != NULL)
*c = '\0';
if (strcmp(input_name, name) == 0)
return fd;
else
close(fd);
}
return -1;
}
int sysfs_path_prefix(char *name, char *path_prefix)
{
DIR *d;
struct dirent *di;
char input_name[80] = { 0 };
char path[PATH_MAX];
char *c;
int fd;
if (name == NULL || path_prefix == NULL)
return -EINVAL;
d = opendir("/sys/class/input");
if (d == NULL)
return -1;
while ((di = readdir(d))) {
if (di == NULL || strcmp(di->d_name, ".") == 0 || strcmp(di->d_name, "..") == 0)
continue;
snprintf(path, PATH_MAX, "/sys/class/input/%s/name", di->d_name);
fd = open(path, O_RDONLY);
if (fd < 0)
continue;
read(fd, &input_name, sizeof(input_name));
close(fd);
c = strstr((char *) &input_name, "\n");
if (c != NULL)
*c = '\0';
if (strcmp(input_name, name) == 0) {
snprintf(path_prefix, PATH_MAX, "/sys/class/input/%s", di->d_name);
return 0;
}
}
return -1;
}
int sysfs_value_write(char *path, int64_t value)
{
char buffer[100];
int fd = -1;
int rc;
if (path == NULL)
return -1;
fd = open(path, O_WRONLY);
if (fd < 0)
goto error;
snprintf((char *) &buffer, sizeof(buffer), "%" PRId64 "\n", value);
rc = write(fd, buffer, strlen(buffer));
if (rc < (int) strlen(buffer))
goto error;
rc = 0;
goto complete;
error:
rc = -1;
complete:
if (fd >= 0)
close(fd);
return rc;
}
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