NetBSD-5.0.2/usr.bin/ruptime/ruptime.c
/* $NetBSD: ruptime.c,v 1.13 2008/07/21 14:19:25 lukem 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 1.13 2008/07/21 14:19:25 lukem 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>
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))
size_t nhosts;
time_t now;
int rflg = 1;
int hscmp(const void *, const void *);
char *interval(time_t, char *);
int lcmp(const void *, const void *);
int main(int, char **);
void morehosts(void);
int tcmp(const void *, const void *);
int ucmp(const void *, const void *);
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;
int aflg, cc, ch, fd, i, 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 < 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);
}
char *
interval(time_t tval, 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) ((struct hs *)(a))
/* Alphabetical comparison. */
int
hscmp(a1, a2)
const void *a1, *a2;
{
return (rflg *
strcmp(HS(a1)->hs_wd->wd_hostname, HS(a2)->hs_wd->wd_hostname));
}
/* Load average comparison. */
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. */
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. */
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)
));
}
void
usage(void)
{
(void)fprintf(stderr, "usage: ruptime [-alrtu]\n");
exit(1);
}