Return to ruptime.c CVS log

Up to [local] / src / usr.bin / ruptime

rcsid[] and sccsid[] and copyright[] are essentially unmaintained (and
unmaintainable).  these days, people use source.  these id's do not provide
any benefit, and do hurt the small install media
(the 33,000 line diff is essentially mechanical)
ok with the idea millert, ok dms

/*	$OpenBSD: ruptime.c,v 1.16 2009/10/27 23:59:43 deraadt 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.
 */

#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 [-alrtu]\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");
}