Add a /bin/uptime

userspace/core/uptime.c

@@ -0,0 +1,94 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+#include <getopt.h>
+#include <sys/time.h>
+
+void print_time(void) {
+	struct timeval now;
+	struct tm * timeinfo;
+	char clocktime[10];
+
+	gettimeofday(&now, NULL);
+	timeinfo = localtime((time_t *)&now.tv_sec);
+	strftime(clocktime, 80, "%H:%M:%S", timeinfo);
+
+	printf(" %s ", clocktime);
+}
+
+#define MINUTE (60)
+#define HOUR (60 * MINUTE)
+#define DAY (24 * HOUR)
+void print_seconds(int seconds) {
+	if (seconds > DAY) {
+		int days = seconds / DAY;
+		seconds -= DAY * days;
+		printf("%d day%s, ", days, days != 1 ? "s" : "");
+	}
+	if (seconds > HOUR) {
+		int hours = seconds / HOUR;
+		seconds -= HOUR * hours;
+		int minutes = seconds / MINUTE;
+		printf("%2d:%02d", hours, minutes);
+		return;
+	} else if (seconds > MINUTE) {
+		int minutes = seconds / MINUTE;
+		printf("%d minute%s,  ", minutes, minutes != 1 ? "s" : "");
+		seconds -= MINUTE * minutes;
+	}
+
+	printf("%2d second%s", seconds, seconds != 1 ? "s" : "");
+}
+
+void print_uptime(void) {
+	FILE * f = fopen("/proc/uptime", "r");
+	if (!f) return;
+
+	int seconds, subseconds;
+
+	fscanf(f, "%d.%2d", &seconds, &subseconds);
+
+	printf("up ");
+
+	print_seconds(seconds);
+}
+
+void show_usage(int argc, char * argv[]) {
+	printf(
+			"uptime - display system uptime information\n"
+			"\n"
+			"usage: %s [-p]\n"
+			"\n"
+			" -p     \033[3mshow just the uptime info\033[0m\n"
+			" -?     \033[3mshow this help text\033[0m\n"
+			"\n", argv[0]);
+}
+
+int main(int argc, char * argv[]) {
+	int just_pretty_uptime = 0;
+
+	if (argc > 1) {
+		int index, c;
+		while ((c = getopt(argc, argv, "p?")) != -1) {
+			switch (c) {
+				case 'p':
+					just_pretty_uptime = 1;
+					break;
+				case '?':
+					show_usage(argc, argv);
+					return 0;
+			}
+		}
+	}
+
+
+	if (!just_pretty_uptime)
+		print_time();
+	print_uptime();
+
+	printf("\n");
+
+	return 0;
+}
+
+