/*
* SPDX-License-Identifier: BSD-3-Clause
*
* 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.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1983, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static const char sccsid[] = "@(#)ruptime.c 8.2 (Berkeley) 4/5/94";
#endif /* not lint */
#include <sys/cdefs.h>
#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 <unistd.h>
static struct hs {
struct whod hs_wd;
int hs_nusers;
} *hs;
#define LEFTEARTH(h) (now - (h) > 4*24*60*60)
#define ISDOWN(h) (now - (h)->hs_wd.wd_recvtime > 11 * 60)
#define WHDRSIZE __offsetof(struct whod, wd_we)
static size_t nhosts;
static time_t now;
static int rflg = 1;
static DIR *dirp;
static int hscmp(const void *, const void *);
static char *interval(time_t, const char *);
static int iwidth(int);
static int lcmp(const void *, const void *);
static void ruptime(const char *, int, int (*)(const void *, const void *));
static int tcmp(const void *, const void *);
static int ucmp(const void *, const void *);
static void usage(void);
int
main(int argc, char *argv[])
{
int (*cmp)(const void *, const void *);
int aflg, ch;
aflg = 0;
cmp = hscmp;
while ((ch = getopt(argc, argv, "alrut")) != -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 (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL)
err(1, "%s", _PATH_RWHODIR);
ruptime(*argv, aflg, cmp);
while (*argv++ != NULL) {
if (*argv == NULL)
break;
ruptime(*argv, aflg, cmp);
}
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 + (60 - 1)) / 60;
hours = minutes / 60;
minutes %= 60;
days = hours / 24;
hours %= 24;
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);
}
/* Width to print a small nonnegative integer. */
static int
iwidth(int w)
{
if (w < 10)
return (1);
if (w < 100)
return (2);
if (w < 1000)
return (3);
if (w < 10000)
return (4);
return (5);
}
#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]));
}
static void
ruptime(const char *host, int aflg, int (*cmp)(const void *, const void *))
{
struct hs *hsp;
struct whod *wd;
struct whoent *we;
struct dirent *dp;
int fd, hostnamewidth, i, loadavwidth[3], userswidth, w;
size_t hspace;
ssize_t cc;
rewinddir(dirp);
hsp = NULL;
hostnamewidth = 0;
loadavwidth[0] = 4;
loadavwidth[1] = 4;
loadavwidth[2] = 4;
userswidth = 1;
(void)time(&now);
for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) {
if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5) != 0)
continue;
if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) {
warn("%s", dp->d_name);
continue;
}
if (nhosts == hspace) {
if ((hs =
realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL)
err(1, NULL);
hsp = hs + nhosts;
}
wd = &hsp->hs_wd;
cc = read(fd, wd, sizeof(*wd));
(void)close(fd);
if (cc < (ssize_t)WHDRSIZE)
continue;
if (host != NULL && strcasecmp(wd->wd_hostname, host) != 0)
continue;
if (LEFTEARTH(wd->wd_recvtime))
continue;
if (hostnamewidth < (int)strlen(wd->wd_hostname))
hostnamewidth = (int)strlen(wd->wd_hostname);
if (!ISDOWN(hsp)) {
for (i = 0; i < 3; i++) {
w = iwidth(wd->wd_loadav[i] / 100) + 3;
if (loadavwidth[i] < w)
loadavwidth[i] = w;
}
for (hsp->hs_nusers = 0, we = &wd->wd_we[0];
(char *)(we + 1) <= (char *)wd + cc; we++)
if (aflg || we->we_idle < 3600)
++hsp->hs_nusers;
if (userswidth < iwidth(hsp->hs_nusers))
userswidth = iwidth(hsp->hs_nusers);
}
++hsp;
++nhosts;
}
if (nhosts == 0) {
if (host == NULL)
errx(1, "no hosts in %s", _PATH_RWHODIR);
else
warnx("host %s not in %s", host, _PATH_RWHODIR);
}
qsort(hs, nhosts, sizeof(hs[0]), cmp);
w = userswidth + loadavwidth[0] + loadavwidth[1] + loadavwidth[2];
if (hostnamewidth + w > 41)
hostnamewidth = 41 - w; /* limit to 79 cols */
for (i = 0; i < (int)nhosts; i++) {
hsp = &hs[i];
wd = &hsp->hs_wd;
if (ISDOWN(hsp)) {
(void)printf("%-*.*s %s\n",
hostnamewidth, hostnamewidth, wd->wd_hostname,
interval(now - hsp->hs_wd.wd_recvtime, "down"));
continue;
}
(void)printf(
"%-*.*s %s, %*d user%s load %*.2f, %*.2f, %*.2f\n",
hostnamewidth, hostnamewidth, wd->wd_hostname,
interval((time_t)wd->wd_sendtime -
(time_t)wd->wd_boottime, " up"),
userswidth, hsp->hs_nusers,
hsp->hs_nusers == 1 ? ", " : "s,",
loadavwidth[0], wd->wd_loadav[0] / 100.0,
loadavwidth[1], wd->wd_loadav[1] / 100.0,
loadavwidth[2], wd->wd_loadav[2] / 100.0);
}
free(hs);
hs = NULL;
}
/* 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] [host ...]\n");
exit(1);
}
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