OpenBSD-4.6/usr.bin/ruptime/ruptime.c
/* $OpenBSD: ruptime.c,v 1.14 2004/10/10 03:50:40 mickey Exp $ */
/*
* Copyright (c) 1983 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.
*/
#ifndef lint
const char copyright[] =
"@(#) Copyright (c) 1983 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
/*static const char sccsid[] = "from: @(#)ruptime.c 5.8 (Berkeley) 7/21/90";*/
static const char rcsid[] = "$OpenBSD: ruptime.c,v 1.14 2004/10/10 03:50:40 mickey Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <sys/file.h>
#include <dirent.h>
#include <protocols/rwhod.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <err.h>
size_t nhosts, hspace = 20;
struct hs {
struct whod *hs_wd;
int hs_nusers;
} *hs;
struct whod awhod;
#define ISDOWN(h) (now - (h)->hs_wd->wd_recvtime > 11 * 60)
#define WHDRSIZE (sizeof (awhod) - sizeof (awhod.wd_we))
time_t now;
int rflg = 1;
int hscmp(const void *, const void *);
int ucmp(const void *, const void *);
int lcmp(const void *, const void *);
int tcmp(const void *, const void *);
char *interval(time_t, char *);
void morehosts(void);
int
main(int argc, char *argv[])
{
extern char *__progname;
struct hs *hsp;
struct whod *wd;
struct whoent *we;
DIR *dirp;
struct dirent *dp;
int aflg, cc, ch, f, i, maxloadav;
char buf[sizeof(struct whod)];
int (*cmp)(const void *, const void *) = hscmp;
aflg = 0;
while ((ch = getopt(argc, argv, "alrut")) != -1)
switch((char)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:
fprintf(stderr, "usage: %s [-alrut]\n", __progname);
exit(1);
}
if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL)
err(1, "%s", _PATH_RWHODIR);
morehosts();
hsp = hs;
maxloadav = -1;
while ((dp = readdir(dirp))) {
if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
continue;
if ((f = open(dp->d_name, O_RDONLY, 0)) < 0) {
warn("%s", dp->d_name);
continue;
}
cc = read(f, buf, sizeof(struct whod));
(void)close(f);
if (cc < WHDRSIZE)
continue;
if (nhosts == hspace) {
morehosts();
hsp = hs + nhosts;
}
/* NOSTRICT */
hsp->hs_wd = malloc((size_t)WHDRSIZE);
wd = (struct whod *)buf;
bcopy((char *)wd, (char *)hsp->hs_wd, (size_t)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++;
}
if (!nhosts)
errx(1, "no hosts in %s.", _PATH_RWHODIR);
(void)time(&now);
qsort((char *)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);
free((void *)hsp->hs_wd);
}
exit(0);
}
char *
interval(time_t tval, char *updown)
{
static char resbuf[32];
int days, hours, minutes;
if (tval < 0 || tval > 999*24*60*60) {
(void)snprintf(resbuf, sizeof resbuf, "%s ??:??", updown);
return(resbuf);
}
minutes = (tval + 59) / 60; /* round to minutes */
hours = minutes / 60; minutes %= 60;
days = hours / 24; hours %= 24;
if (days)
(void)snprintf(resbuf, sizeof resbuf, "%s %3d+%02d:%02d",
updown, days, hours, minutes);
else
(void)snprintf(resbuf, sizeof resbuf, "%s %2d:%02d",
updown, hours, minutes);
return(resbuf);
}
/* alphabetical comparison */
int
hscmp(const void *a1, const void *a2)
{
const struct hs *h1 = a1, *h2 = a2;
return(rflg * strcmp(h1->hs_wd->wd_hostname, h2->hs_wd->wd_hostname));
}
/* load average comparison */
int
lcmp(const void *a1, const void *a2)
{
const struct hs *h1 = a1, *h2 = a2;
if (ISDOWN(h1))
if (ISDOWN(h2))
return(tcmp(a1, a2));
else
return(rflg);
else if (ISDOWN(h2))
return(-rflg);
else
return(rflg *
(h2->hs_wd->wd_loadav[0] - h1->hs_wd->wd_loadav[0]));
}
/* number of users comparison */
int
ucmp(const void *a1, const void *a2)
{
const struct hs *h1 = a1, *h2 = a2;
if (ISDOWN(h1))
if (ISDOWN(h2))
return(tcmp(a1, a2));
else
return(rflg);
else if (ISDOWN(h2))
return(-rflg);
else
return(rflg * (h2->hs_nusers - h1->hs_nusers));
}
/* uptime comparison */
int
tcmp(const void *a1, const void *a2)
{
const struct hs *h1 = a1, *h2 = a2;
return(rflg * (
(ISDOWN(h2) ? h2->hs_wd->wd_recvtime - now
: h2->hs_wd->wd_sendtime - h2->hs_wd->wd_boottime)
-
(ISDOWN(h1) ? h1->hs_wd->wd_recvtime - now
: h1->hs_wd->wd_sendtime - h1->hs_wd->wd_boottime)
));
}
void
morehosts(void)
{
hs = realloc((char *)hs, (hspace *= 2) * sizeof(*hs));
if (hs == NULL)
err(1, "realloc");
}