BSD 3 development

Work on file usr/src/cmd/uptime.c

Synthesized-from: 3bsd

diff --git a/usr/src/cmd/uptime.c b/usr/src/cmd/uptime.c
new file mode 100644 (file)
index 0000000..ea73021
--- /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");
+}