make ruptime less technophobic (from whm%arizona.csnet@CSNET-RELAY.ARPA)

[unix-history] / usr / src / usr.bin / ruptime / ruptime.c

/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.  The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1983 Regents of the University of California.\n\
All rights reserved.\n";
#endif not lint

#ifndef lint
static char sccsid[] = "@(#)ruptime.c   5.3 (Berkeley) %G%";
#endif not lint

#include <sys/param.h>
#include <stdio.h>
#include <sys/dir.h>
#include <protocols/rwhod.h>

DIR     *dirp;

#define NHOSTS  100
int     nhosts;
struct  hs {
       struct  whod *hs_wd;
       int     hs_nusers;
} hs[NHOSTS];
struct  whod awhod;
int     hscmp(), ucmp(), lcmp(), tcmp();

#define WHDRSIZE        (sizeof (awhod) - sizeof (awhod.wd_we))
#define RWHODIR         "/usr/spool/rwho"

char    *interval();
int     now;
char    *malloc(), *sprintf();
int     aflg;
int     rflg = 1;

#define down(h)         (now - (h)->hs_wd->wd_recvtime > 11 * 60)

main(argc, argv)
       int argc;
       char **argv;
{
       struct direct *dp;
       int f, i, t;
       char buf[sizeof(struct whod)]; int cc;
       char *name;
       register struct hs *hsp = hs;
       register struct whod *wd;
       register struct whoent *we;
       int maxloadav = 0;
       int (*cmp)() = hscmp;

       name = *argv;
       while (*++argv) 
               while (**argv)
                       switch (*(*argv)++) {
                       case 'a':
                               aflg++;
                               break;
                       case 'l':
                               cmp = lcmp;
                               break;
                       case 'u':
                               cmp = ucmp;
                               break;
                       case 't':
                               cmp = tcmp;
                               break;
                       case 'r':
                               rflg = -rflg;
                               break;
                       case '-':
                               break;
                       default: 
                               fprintf(stderr, "Usage: %s [ -ar [ lut ] ]\n",
                                       name);
                               exit (1);
                       }
       time(&t);
       if (chdir(RWHODIR) < 0) {
               perror(RWHODIR);
               exit(1);
       }
       dirp = opendir(".");
       if (dirp == NULL) {
               perror(RWHODIR);
               exit(1);
       }
       while (dp = readdir(dirp)) {
               if (dp->d_ino == 0)
                       continue;
               if (strncmp(dp->d_name, "whod.", 5))
                       continue;
               if (nhosts == NHOSTS) {
                       fprintf(stderr, "too many hosts\n");
                       exit(1);
               }
               f = open(dp->d_name, 0);
               if (f > 0) {
                       cc = read(f, buf, sizeof(struct whod));
                       if (cc >= WHDRSIZE) {
                               hsp->hs_wd = (struct whod *)malloc(WHDRSIZE);
                               wd = (struct whod *)buf;
                               bcopy(buf, hsp->hs_wd, WHDRSIZE);
                               hsp->hs_nusers = 0;
                               for (i = 0; i < 2; i++)
                                       if (wd->wd_loadav[i] > maxloadav)
                                               maxloadav = wd->wd_loadav[i];
                               we = (struct whoent *)(buf+cc);
                               while (--we >= wd->wd_we)
                                       if (aflg || we->we_idle < 3600)
                                               hsp->hs_nusers++;
                               nhosts++; hsp++;
                       }
               }
               (void) close(f);
       }
       (void) time(&now);
       qsort((char *)hs, nhosts, sizeof (hs[0]), cmp);
       if (nhosts == 0) {
               printf("no hosts!?!\n");
               exit(1);
       }
       for (i = 0; i < nhosts; i++) {
               hsp = &hs[i];
               if (down(hsp)) {
                       printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname,
                           interval(now - hsp->hs_wd->wd_recvtime, "down"));
                       continue;
               }
               printf("%-12.12s%s,  %4d user%s  load %*.2f, %*.2f, %*.2f\n",
                   hsp->hs_wd->wd_hostname,
                   interval(hsp->hs_wd->wd_sendtime -
                       hsp->hs_wd->wd_boottime, "  up"),
                   hsp->hs_nusers,
                   hsp->hs_nusers == 1 ? ", " : "s,",
                   maxloadav >= 1000 ? 5 : 4,
                       hsp->hs_wd->wd_loadav[0] / 100.0,
                   maxloadav >= 1000 ? 5 : 4,
                       hsp->hs_wd->wd_loadav[1] / 100.0,
                   maxloadav >= 1000 ? 5 : 4,
                       hsp->hs_wd->wd_loadav[2] / 100.0);
               cfree(hsp->hs_wd);
       }
       exit(0);
}

char *
interval(time, updown)
       int time;
       char *updown;
{
       static char resbuf[32];
       int days, hours, minutes;

       if (time < 0 || time > 365*24*60*60) {
               (void) sprintf(resbuf, "   %s ??:??", updown);
               return (resbuf);
       }
       minutes = (time + 59) / 60;             /* round to minutes */
       hours = minutes / 60; minutes %= 60;
       days = hours / 24; hours %= 24;
       if (days)
               (void) sprintf(resbuf, "%s %2d+%02d:%02d",
                   updown, days, hours, minutes);
       else
               (void) sprintf(resbuf, "%s    %2d:%02d",
                   updown, hours, minutes);
       return (resbuf);
}

hscmp(h1, h2)
       struct hs *h1, *h2;
{

       return (rflg * strcmp(h1->hs_wd->wd_hostname, h2->hs_wd->wd_hostname));
}

/*
* Compare according to load average.
*/
lcmp(h1, h2)
       struct hs *h1, *h2;
{

       if (down(h1))
               if (down(h2))
                       return (tcmp(h1, h2));
               else
                       return (rflg);
       else if (down(h2))
               return (-rflg);
       else
               return (rflg * 
                       (h2->hs_wd->wd_loadav[0] - h1->hs_wd->wd_loadav[0]));
}

/*
* Compare according to number of users.
*/
ucmp(h1, h2)
       struct hs *h1, *h2;
{

       if (down(h1))
               if (down(h2))
                       return (tcmp(h1, h2));
               else
                       return (rflg);
       else if (down(h2))
               return (-rflg);
       else
               return (rflg * (h2->hs_nusers - h1->hs_nusers));
}

/*
* Compare according to uptime.
*/
tcmp(h1, h2)
       struct hs *h1, *h2;
{
       long t1, t2;

       return (rflg * (
               (down(h2) ? h2->hs_wd->wd_recvtime - now
                         : h2->hs_wd->wd_sendtime - h2->hs_wd->wd_boottime)
               -
               (down(h1) ? h1->hs_wd->wd_recvtime - now
                         : h1->hs_wd->wd_sendtime - h1->hs_wd->wd_boottime)
       ));
}