From c31d941cb0c284ba137e54ee5cc7a7c08c0e5023 Mon Sep 17 00:00:00 2001
From: Bill Joy <wnj@ucbvax.Berkeley.EDU>
Date: Thu, 4 Oct 1979 05:34:45 -0800
Subject: [PATCH] BSD 3 development Work on file usr/src/cmd/uptime.c

Synthesized-from: 3bsd
---
 usr/src/cmd/uptime.c | 101 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 usr/src/cmd/uptime.c

diff --git a/usr/src/cmd/uptime.c b/usr/src/cmd/uptime.c
new file mode 100644
index 0000000000..ea73021274
--- /dev/null
+++ b/usr/src/cmd/uptime.c
@@ -0,0 +1,101 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <a.out.h>
+#include <time.h>
+
+struct	tm *localtime();
+
+#define	DIV60(t)	((t+30)/60)    /* x/60 rounded */ 
+
+struct	nlist	nl[] = {
+#define X_BOOTIME	0
+	{ "_bootime" },
+#define X_AVENRUN	1
+	{ "_avenrun" },
+	{ 0 }
+};
+
+time_t	now, bootime;
+double	avenrun[3];
+
+int	kmem;
+
+main(argc, argv)
+	char **argv;
+{
+	char obuf[BUFSIZ];
+	register int i, days;
+	register time_t uptime;
+	register struct tm *nowt;
+
+	setbuf(stdout, obuf);
+	nlist("/vmunix" , nl);
+	if (nl[0].n_value == 0) {
+		fprintf(stderr, "No namelist\n");
+		exit(1);
+	}
+	kmem = open("/dev/kmem", 0);
+	if (kmem < 0) {
+		fprintf(stderr ,"No kmem\n");
+		exit(1);
+	}
+	time(&now);
+	nowt = localtime(&now);
+	prtat(nowt);
+	lseek(kmem, (long)nl[X_BOOTIME].n_value, 0);
+	read(kmem, &bootime, sizeof (bootime));
+	uptime = now - bootime;
+	printf("  up");
+	days = uptime / (60*60*24);
+	if (days > 0) {
+		printf(" %d day%s, ", days, days>1?"s":"");
+		uptime %= (60*60*24);
+	}
+	prttime(DIV60(uptime), "");
+	printf("\t\t");
+	printf("load average:");
+	lseek(kmem, (long)nl[X_AVENRUN].n_value, 0);
+	read(kmem, avenrun, sizeof(avenrun));
+	for (i = 0; i < 3; i++) {
+		printf(" %.2f", avenrun[i]);
+		if (i < 2)
+			printf(",");
+	}
+	printf("\n");
+}
+
+prttime(tim, tail)
+	time_t tim;
+	char *tail;
+{
+	register int didhrs = 0;
+
+	if (tim >= 60) {
+		printf("%3d:", tim/60);
+		didhrs++;
+	} else {
+		printf("    ");
+	}
+	tim %= 60;
+	if (tim > 0 || didhrs) {
+		printf(didhrs&&tim<10 ? "%02d" : "%2d", tim);
+	} else {
+		printf("  ");
+	}
+	printf("%s", tail);
+}
+
+/* prtat prints a 12 hour time given a pointer to a time of day */
+prtat(p)
+	struct tm *p;
+{
+	register int t, pm;
+
+	t = p -> tm_hour;
+	pm = (t > 11);
+	if (t > 11)
+		t -= 12;
+	if (t == 0)
+		t = 12;
+	prttime(t*60 + p->tm_min, pm ? "pm" : "am");
+}
-- 
2.20.1