95 lines
1.8 KiB
C
95 lines
1.8 KiB
C
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#include <stdlib.h>
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#include <stdio.h>
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#include <time.h>
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#include <getopt.h>
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#include <sys/time.h>
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void print_time(void) {
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struct timeval now;
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struct tm * timeinfo;
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char clocktime[10];
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gettimeofday(&now, NULL);
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timeinfo = localtime((time_t *)&now.tv_sec);
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strftime(clocktime, 80, "%H:%M:%S", timeinfo);
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printf(" %s ", clocktime);
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}
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#define MINUTE (60)
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#define HOUR (60 * MINUTE)
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#define DAY (24 * HOUR)
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void print_seconds(int seconds) {
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if (seconds > DAY) {
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int days = seconds / DAY;
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seconds -= DAY * days;
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printf("%d day%s, ", days, days != 1 ? "s" : "");
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}
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if (seconds > HOUR) {
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int hours = seconds / HOUR;
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seconds -= HOUR * hours;
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int minutes = seconds / MINUTE;
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printf("%2d:%02d", hours, minutes);
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return;
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} else if (seconds > MINUTE) {
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int minutes = seconds / MINUTE;
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printf("%d minute%s, ", minutes, minutes != 1 ? "s" : "");
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seconds -= MINUTE * minutes;
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}
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printf("%2d second%s", seconds, seconds != 1 ? "s" : "");
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}
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void print_uptime(void) {
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FILE * f = fopen("/proc/uptime", "r");
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if (!f) return;
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int seconds, subseconds;
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fscanf(f, "%d.%2d", &seconds, &subseconds);
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printf("up ");
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print_seconds(seconds);
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}
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void show_usage(int argc, char * argv[]) {
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printf(
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"uptime - display system uptime information\n"
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"\n"
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"usage: %s [-p]\n"
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"\n"
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" -p \033[3mshow just the uptime info\033[0m\n"
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" -? \033[3mshow this help text\033[0m\n"
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"\n", argv[0]);
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}
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int main(int argc, char * argv[]) {
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int just_pretty_uptime = 0;
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if (argc > 1) {
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int index, c;
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while ((c = getopt(argc, argv, "p?")) != -1) {
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switch (c) {
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case 'p':
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just_pretty_uptime = 1;
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break;
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case '?':
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show_usage(argc, argv);
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return 0;
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}
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}
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}
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if (!just_pretty_uptime)
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print_time();
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print_uptime();
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printf("\n");
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return 0;
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}
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