freebsd-dev/usr.bin/ruptime/ruptime.c
Pedro F. Giffuni 8a16b7a18f General further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:49:47 +00:00

321 lines
7.9 KiB
C

/*
* 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>
__FBSDID("$FreeBSD$");
#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);
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);
}