79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
|
/*
|
||
|
|
* Copyright 2018 Andreas Scheider <asn@cryptomilk.org>
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <errno.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <locale.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
#include "proc_uptime.h"
|
||
|
|
|
||
|
|
#define UPTIME_FILE "/proc/uptime"
|
||
|
|
|
||
|
|
int uptime(const char *uptime_path, double *uptime_secs, double *idle_secs)
|
||
|
|
{
|
||
|
|
double up = 0;
|
||
|
|
double idle = 0;
|
||
|
|
char *savelocale = NULL;
|
||
|
|
char buf[1024] = {0};
|
||
|
|
ssize_t nread;
|
||
|
|
int fd = -1;
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
if (uptime_path == NULL) {
|
||
|
|
uptime_path = UPTIME_FILE;
|
||
|
|
}
|
||
|
|
|
||
|
|
fd = open(uptime_path, O_RDONLY);
|
||
|
|
if (fd < 0) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
nread = read(fd, buf, sizeof(buf));
|
||
|
|
close(fd);
|
||
|
|
if (nread < 0) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
savelocale = strdup(setlocale(LC_NUMERIC, NULL));
|
||
|
|
if (savelocale == NULL) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
setlocale(LC_NUMERIC, "C");
|
||
|
|
rc = sscanf(buf, "%lf %lf", &up, &idle);
|
||
|
|
setlocale(LC_NUMERIC, savelocale);
|
||
|
|
free(savelocale);
|
||
|
|
if (rc < 2) {
|
||
|
|
errno = EFAULT;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (uptime_secs != NULL) {
|
||
|
|
*uptime_secs = up;
|
||
|
|
}
|
||
|
|
if (idle_secs != NULL) {
|
||
|
|
*idle_secs = idle;
|
||
|
|
}
|
||
|
|
|
||
|
|
return (int)up;
|
||
|
|
}
|