116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
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/*
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* Copyright 2018 Andreas Scheider <asn@cryptomilk.org>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <time.h>
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#include <sys/time.h>
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#include "proc_uptime.h"
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static char *calc_uptime(void)
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{
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uint32_t up_minutes, up_hours, up_days, up_weeks, up_years;
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ssize_t pos = 0;
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size_t comma = 0;
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double uptime_secs, idle_secs;
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char buf[1024] = {0};
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int up;
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up = uptime("/proc/uptime", &uptime_secs, &idle_secs);
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if (up == 0) {
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return NULL;
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}
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up_years = ((uint32_t)uptime_secs / (60 * 60 * 24 * 365)) % 10;
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up_weeks = ((uint32_t)uptime_secs / (60 * 60 * 24 * 7)) % 52;
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up_days = ((uint32_t)uptime_secs / (60 * 60 * 24)) % 7;
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pos += snprintf(buf + pos, sizeof(buf) - pos, "up ");
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up_minutes = (uint32_t)uptime_secs / 60;
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up_hours = up_minutes / 60;
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up_hours = up_hours % 24;
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up_minutes = up_minutes % 60;
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if (up_years > 0) {
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pos += snprintf(buf + pos, sizeof(buf) - pos,
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"%u %s",
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up_years,
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up_years > 1 ? "years" : "year");
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comma++;
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}
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if (up_weeks > 0) {
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pos += snprintf(buf + pos, sizeof(buf) - pos,
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"%s%u %s",
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comma > 0 ? ", " : "",
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up_weeks,
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up_weeks > 1 ? "weeks" : "week");
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comma++;
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}
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if (up_days > 0) {
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pos += snprintf(buf + pos, sizeof(buf) - pos,
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"%s%u %s",
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comma > 0 ? ", " : "",
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up_days,
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up_days > 1 ? "days" : "day");
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comma++;
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}
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if (up_hours > 0) {
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pos += snprintf(buf + pos, sizeof(buf) - pos,
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"%s%u %s",
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comma > 0 ? ", " : "",
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up_hours,
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up_hours > 1 ? "hours" : "hour");
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comma++;
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}
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if (up_minutes > 0 || (up_minutes == 0 && uptime_secs < 60)) {
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pos += snprintf(buf + pos, sizeof(buf) - pos,
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"%s%u %s",
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comma > 0 ? ", " : "",
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up_minutes,
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up_minutes != 1 ? "minutes" : "minute");
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comma++;
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}
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return strdup(buf);
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}
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#ifndef UNIT_TESTING
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int main(void)
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{
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char *uptime_str = NULL;
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uptime_str = calc_uptime();
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if (uptime_str == NULL) {
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fprintf(stderr, "Failed to read uptime\n");
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return 1;
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}
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printf("%s\n", uptime_str);
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free(uptime_str);
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return 0;
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}
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#endif /* UNIT_TESTING */
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