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/*
* 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 <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>
#include "proc_uptime.h"
static char *calc_uptime(void)
{
uint32_t up_minutes, up_hours, up_days, up_weeks, up_years;
ssize_t pos = 0;
size_t comma = 0;
double uptime_secs, idle_secs;
char buf[1024] = {0};
int up;
up = uptime("/proc/uptime", &uptime_secs, &idle_secs);
if (up == 0) {
return NULL;
}
up_years = ((uint32_t)uptime_secs / (60 * 60 * 24 * 365)) % 10;
up_weeks = ((uint32_t)uptime_secs / (60 * 60 * 24 * 7)) % 52;
up_days = ((uint32_t)uptime_secs / (60 * 60 * 24)) % 7;
pos += snprintf(buf + pos, sizeof(buf) - pos, "up ");
up_minutes = (uint32_t)uptime_secs / 60;
up_hours = up_minutes / 60;
up_hours = up_hours % 24;
up_minutes = up_minutes % 60;
if (up_years > 0) {
pos += snprintf(buf + pos, sizeof(buf) - pos,
"%u %s",
up_years,
up_years > 1 ? "years" : "year");
comma++;
}
if (up_weeks > 0) {
pos += snprintf(buf + pos, sizeof(buf) - pos,
"%s%u %s",
comma > 0 ? ", " : "",
up_weeks,
up_weeks > 1 ? "weeks" : "week");
comma++;
}
if (up_days > 0) {
pos += snprintf(buf + pos, sizeof(buf) - pos,
"%s%u %s",
comma > 0 ? ", " : "",
up_days,
up_days > 1 ? "days" : "day");
comma++;
}
if (up_hours > 0) {
pos += snprintf(buf + pos, sizeof(buf) - pos,
"%s%u %s",
comma > 0 ? ", " : "",
up_hours,
up_hours > 1 ? "hours" : "hour");
comma++;
}
if (up_minutes > 0 || (up_minutes == 0 && uptime_secs < 60)) {
pos += snprintf(buf + pos, sizeof(buf) - pos,
"%s%u %s",
comma > 0 ? ", " : "",
up_minutes,
up_minutes != 1 ? "minutes" : "minute");
comma++;
}
return strdup(buf);
}
#ifndef UNIT_TESTING
int main(void)
{
char *uptime_str = NULL;
uptime_str = calc_uptime();
if (uptime_str == NULL) {
fprintf(stderr, "Failed to read uptime\n");
return 1;
}
printf("%s\n", uptime_str);
free(uptime_str);
return 0;
}
#endif /* UNIT_TESTING */
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