/*      $NetBSD: ruptime.c,v 1.15 2011/09/06 18:29:19 joerg Exp $       */

/*
* Copyright (c) 1983, 1993, 1994
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1983, 1993, 1994\
The Regents of the University of California.  All rights reserved.");
#endif /* not lint */

#ifndef lint
/*static char sccsid[] = "from: @(#)ruptime.c   8.2 (Berkeley) 4/5/94";*/
__RCSID("$NetBSD: ruptime.c,v 1.15 2011/09/06 18:29:19 joerg Exp $");
#endif /* not lint */

#include <sys/param.h>

#include <protocols/rwhod.h>

#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <tzfile.h>
#include <unistd.h>

static struct hs {
       struct  whod *hs_wd;
       int     hs_nusers;
} *hs;

#define ISDOWN(h)       (now - (h)->hs_wd->wd_recvtime > 11 * 60)
#define WHDRSIZE        (sizeof(struct whod) - \
   sizeof (((struct whod *)0)->wd_we))

static size_t nhosts;
static time_t now;
static int rflg = 1;

static int       hscmp(const void *, const void *);
static char     *interval(time_t, const char *);
static int       lcmp(const void *, const void *);
static int       tcmp(const void *, const void *);
static int       ucmp(const void *, const void *);
__dead static void       usage(void);

int
main(int argc, char **argv)
{
       struct dirent *dp;
       struct hs *hsp;
       struct whod *wd;
       struct whoent *we;
       DIR *dirp;
       size_t hspace, i;
       int aflg, cc, ch, fd, maxloadav;
       char buf[sizeof(struct whod)];
       int (*cmp)(const void *, const void *);

       hsp = NULL;
       aflg = 0;
       cmp = hscmp;
       while ((ch = getopt(argc, argv, "alrtu")) != -1)
               switch (ch) {
               case 'a':
                       aflg = 1;
                       break;
               case 'l':
                       cmp = lcmp;
                       break;
               case 'r':
                       rflg = -1;
                       break;
               case 't':
                       cmp = tcmp;
                       break;
               case 'u':
                       cmp = ucmp;
                       break;
               default:
                       usage();
               }
       argc -= optind;
       argv += optind;

       if (argc != 0)
               usage();

       if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL)
               err(1, "%s", _PATH_RWHODIR);

       maxloadav = -1;
       for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) {
               if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
                       continue;
               if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) {
                       warn("%s", dp->d_name);
                       continue;
               }
               cc = read(fd, buf, sizeof(struct whod));
               (void)close(fd);

               if (cc < (int)WHDRSIZE)
                       continue;
               if (nhosts == hspace) {
                       if ((hs =
                           realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL)
                               err(1, "realloc");
                       hsp = hs + nhosts;
               }

               if ((hsp->hs_wd = malloc((size_t)WHDRSIZE)) == NULL)
                       err(1, "malloc");
               memmove(hsp->hs_wd, buf, (size_t)WHDRSIZE);

               for (wd = (struct whod *)buf, i = 0; i < 2; ++i)
                       if (wd->wd_loadav[i] > maxloadav)
                               maxloadav = wd->wd_loadav[i];

               for (hsp->hs_nusers = 0,
                   we = (struct whoent *)(buf + cc); --we >= wd->wd_we;)
                       if (aflg || we->we_idle < 3600)
                               ++hsp->hs_nusers;
               ++hsp;
               ++nhosts;
       }
       if (nhosts == 0)
               errx(0, "no hosts in %s", _PATH_RWHODIR);

       (void)time(&now);
       qsort(hs, nhosts, sizeof (hs[0]), cmp);
       for (i = 0; i < nhosts; i++) {
               hsp = &hs[i];
               if (ISDOWN(hsp)) {
                       (void)printf("%-12.12s%s\n", hsp->hs_wd->wd_hostname,
                           interval(now - hsp->hs_wd->wd_recvtime, "down"));
                       continue;
               }
               (void)printf(
                   "%-12.12s%s,  %4d user%s  load %*.2f, %*.2f, %*.2f\n",
                   hsp->hs_wd->wd_hostname,
                   interval((time_t)hsp->hs_wd->wd_sendtime -
                       (time_t)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);
       }
       exit(0);
}

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

       if (tval < 0) {
               (void)snprintf(resbuf, sizeof(resbuf), "   %s ??:??", updown);
               return (resbuf);
       }
                                               /* round to minutes. */
       minutes = (tval + (SECSPERMIN - 1)) / SECSPERMIN;
       hours = minutes / MINSPERHOUR;
       minutes %= MINSPERHOUR;
       days = hours / HOURSPERDAY;
       hours %= HOURSPERDAY;
       if (days)
               (void)snprintf(resbuf, sizeof(resbuf),
                   "%s%4d+%02d:%02d", updown, days, hours, minutes);
       else
               (void)snprintf(resbuf, sizeof(resbuf),
                   "%s     %2d:%02d", updown, hours, minutes);
       return (resbuf);
}

#define HS(a)   ((const struct hs *)(a))

/* Alphabetical comparison. */
static int
hscmp(const void *a1, const void *a2)
{
       return (rflg *
           strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname));
}

/* Load average comparison. */
static int
lcmp(const void *a1, const void *a2)
{
       if (ISDOWN(HS(a1))) {
               if (ISDOWN(HS(a2)))
                       return (tcmp(a1, a2));
               else
                       return (rflg);
       } else if (ISDOWN(HS(a2))) {
               return (-rflg);
       } else
               return (rflg *
                  (HS(a2)->hs_wd->wd_loadav[0] - HS(a1)->hs_wd->wd_loadav[0]));
}

/* Number of users comparison. */
static int
ucmp(const void *a1, const void *a2)
{
       if (ISDOWN(HS(a1))) {
               if (ISDOWN(HS(a2)))
                       return (tcmp(a1, a2));
               else
                       return (rflg);
       } else if (ISDOWN(HS(a2))) {
               return (-rflg);
       } else
               return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers));
}

/* Uptime comparison. */
static int
tcmp(const void *a1, const void *a2)
{
       return (rflg * (
               (ISDOWN(HS(a2)) ? HS(a2)->hs_wd->wd_recvtime - now
                   : HS(a2)->hs_wd->wd_sendtime - HS(a2)->hs_wd->wd_boottime)
               -
               (ISDOWN(HS(a1)) ? HS(a1)->hs_wd->wd_recvtime - now
                   : HS(a1)->hs_wd->wd_sendtime - HS(a1)->hs_wd->wd_boottime)
       ));
}

static void
usage(void)
{
       (void)fprintf(stderr, "usage: ruptime [-alrtu]\n");
       exit(1);
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.