uptime

Makefile

@@ -1,4 +1,4 @@
-objects = coreutils console-tools networking miscutils
+objects = coreutils console-tools networking miscutils procps
 
 CFLAGS?=-s -Os -flto -pedantic -Wall -Wextra
 CC?=cc

procps/Makefile

@@ -0,0 +1,11 @@
+C_SOURCES:=$(wildcard ./*.c)
+C_TARGETS:=$(patsubst ./%.c, ../bin/%, $(C_SOURCES))
+TARGETS:=$(C_TARGETS)
+
+CFLAGS?=-s -Os -flto -pedantic -Wall -Wextra
+CC?=cc
+
+all: ../bin $(TARGETS)
+
+../bin/%: %.c
+	$(CC) $(CFLAGS) -o $@ $<

procps/uptime.c

@@ -0,0 +1,53 @@
+#include <stdio.h>
+#include <time.h>
+
+#if defined(CLOCK_BOOTTIME)
+	#define CLOCK CLOCK_BOOTTIME
+#elif defined(CLOCK_UPTIME)
+	#define CLOCK CLOCK_UPTIME
+#elif defined(__APPLE__)
+	#define CLOCK CLOCK_MONOTONIC
+#endif
+
+int main(void) {
+
+	/* Now date */
+	time_t current_secs;
+	time(&current_secs);
+
+	struct tm *current_time = localtime(&current_secs);
+	printf("%02u:%02u:%02u  ", current_time->tm_hour, current_time->tm_min, current_time->tm_sec);
+
+	/* How long system has beep up */
+	struct timespec uptime;
+	if (clock_gettime(CLOCK, &uptime) != -1) {
+		int days = uptime.tv_sec / 86400;
+		int hours = uptime.tv_sec / 3600;
+		int mins = (uptime.tv_sec / 60) - (uptime.tv_sec / 3600 * 60);
+
+
+		printf("up:");
+
+		if (days > 0)
+			printf(" %d days", days);
+
+		if (hours > 0)
+			printf(" %d hours", hours);
+
+		printf(" %d mins", mins);
+	}
+
+
+	/* Print 1, 5 and 15 minute load averages */
+	double avg[3] = {0, 0, 0};
+
+#ifndef __ANDROID__
+	if (getloadavg(avg, sizeof(avg) / sizeof(avg[0])) < 0) {
+		fprintf(stderr, "getloadavg: getloadavg() failed\n");
+		return 1;
+	}
+#endif
+
+	printf("  load average: %.2f %.2f %.2f\n", avg[0], avg[1], avg[2]);
+	return 0;
+}