296 lines
7.2 KiB
C
296 lines
7.2 KiB
C
/*
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* Copyright (c) 1983, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1983, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static const char sccsid[] = "@(#)ruptime.c 8.2 (Berkeley) 4/5/94";
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <protocols/rwhod.h>
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#include <dirent.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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static struct hs {
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struct whod hs_wd;
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int hs_nusers;
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} *hs;
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#define LEFTEARTH(h) (now - (h) > 4*24*60*60)
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#define ISDOWN(h) (now - (h)->hs_wd.wd_recvtime > 11 * 60)
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#define WHDRSIZE __offsetof(struct whod, wd_we)
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static size_t nhosts;
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static time_t now;
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static int rflg = 1;
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static DIR *dirp;
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static int hscmp(const void *, const void *);
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static char *interval(time_t, const char *);
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static int lcmp(const void *, const void *);
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static void ruptime(const char *, int, int (*)(const void *, const void *));
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static int tcmp(const void *, const void *);
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static int ucmp(const void *, const void *);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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int (*cmp)(const void *, const void *);
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int aflg, ch;
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aflg = 0;
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cmp = hscmp;
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while ((ch = getopt(argc, argv, "alrut")) != -1)
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switch (ch) {
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case 'a':
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aflg = 1;
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break;
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case 'l':
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cmp = lcmp;
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break;
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case 'r':
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rflg = -1;
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break;
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case 't':
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cmp = tcmp;
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break;
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case 'u':
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cmp = ucmp;
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL)
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err(1, "%s", _PATH_RWHODIR);
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ruptime(*argv, aflg, cmp);
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while (*argv++ != NULL) {
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if (*argv == NULL)
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break;
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ruptime(*argv, aflg, cmp);
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}
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exit(0);
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}
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static char *
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interval(time_t tval, const char *updown)
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{
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static char resbuf[32];
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int days, hours, minutes;
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if (tval < 0) {
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(void)snprintf(resbuf, sizeof(resbuf), "%s ??:??", updown);
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return (resbuf);
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}
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/* Round to minutes. */
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minutes = (tval + (60 - 1)) / 60;
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hours = minutes / 60;
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minutes %= 60;
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days = hours / 24;
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hours %= 24;
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if (days)
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(void)snprintf(resbuf, sizeof(resbuf),
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"%s %4d+%02d:%02d", updown, days, hours, minutes);
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else
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(void)snprintf(resbuf, sizeof(resbuf),
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"%s %2d:%02d", updown, hours, minutes);
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return (resbuf);
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}
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#define HS(a) ((const struct hs *)(a))
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/* Alphabetical comparison. */
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static int
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hscmp(const void *a1, const void *a2)
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{
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return (rflg *
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strcmp(HS(a1)->hs_wd.wd_hostname, HS(a2)->hs_wd.wd_hostname));
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}
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/* Load average comparison. */
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static int
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lcmp(const void *a1, const void *a2)
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{
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if (ISDOWN(HS(a1)))
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if (ISDOWN(HS(a2)))
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return (tcmp(a1, a2));
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else
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return (rflg);
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else if (ISDOWN(HS(a2)))
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return (-rflg);
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else
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return (rflg *
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(HS(a2)->hs_wd.wd_loadav[0] - HS(a1)->hs_wd.wd_loadav[0]));
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}
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static void
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ruptime(const char *host, int aflg, int (*cmp)(const void *, const void *))
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{
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struct hs *hsp;
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struct whod *wd;
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struct whoent *we;
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struct dirent *dp;
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const char *hostname;
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int fd, i, maxloadav;
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size_t hspace;
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ssize_t cc;
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rewinddir(dirp);
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hsp = NULL;
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maxloadav = -1;
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(void)time(&now);
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for (nhosts = hspace = 0; (dp = readdir(dirp)) != NULL;) {
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if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5) != 0)
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continue;
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if ((fd = open(dp->d_name, O_RDONLY, 0)) < 0) {
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warn("%s", dp->d_name);
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continue;
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}
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if (nhosts == hspace) {
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if ((hs =
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realloc(hs, (hspace += 40) * sizeof(*hs))) == NULL)
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err(1, NULL);
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hsp = hs + nhosts;
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}
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wd = &hsp->hs_wd;
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cc = read(fd, wd, sizeof(*wd));
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(void)close(fd);
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if (cc < (ssize_t)WHDRSIZE)
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continue;
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if (host != NULL) {
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hostname = wd->wd_hostname;
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if (strcasecmp(hostname, host) != 0)
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continue;
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}
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if (LEFTEARTH(wd->wd_recvtime))
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continue;
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for (i = 0; i < 2; i++)
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if (wd->wd_loadav[i] > maxloadav)
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maxloadav = wd->wd_loadav[i];
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for (hsp->hs_nusers = 0, we = &wd->wd_we[0];
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(char *)(we + 1) <= (char *)wd + cc; we++)
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if (aflg || we->we_idle < 3600)
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++hsp->hs_nusers;
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++hsp;
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++nhosts;
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}
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if (nhosts == 0) {
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if (host == NULL)
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errx(1, "no hosts in %s", _PATH_RWHODIR);
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else
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warnx("host %s not in %s", host, _PATH_RWHODIR);
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}
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qsort(hs, nhosts, sizeof(hs[0]), cmp);
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for (i = 0; i < (int)nhosts; i++) {
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hsp = &hs[i];
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wd = &hsp->hs_wd;
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if (ISDOWN(hsp)) {
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(void)printf("%-25.25s%s\n", wd->wd_hostname,
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interval(now - hsp->hs_wd.wd_recvtime, "down"));
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continue;
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}
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(void)printf(
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"%-25.25s%s, %4d user%s load %*.2f, %*.2f, %*.2f\n",
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wd->wd_hostname,
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interval((time_t)wd->wd_sendtime -
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(time_t)wd->wd_boottime, " up"),
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hsp->hs_nusers,
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hsp->hs_nusers == 1 ? ", " : "s,",
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maxloadav >= 1000 ? 5 : 4,
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wd->wd_loadav[0] / 100.0,
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maxloadav >= 1000 ? 5 : 4,
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wd->wd_loadav[1] / 100.0,
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maxloadav >= 1000 ? 5 : 4,
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wd->wd_loadav[2] / 100.0);
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}
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free(hs);
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hs = NULL;
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}
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/* Number of users comparison. */
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static int
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ucmp(const void *a1, const void *a2)
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{
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if (ISDOWN(HS(a1)))
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if (ISDOWN(HS(a2)))
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return (tcmp(a1, a2));
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else
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return (rflg);
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else if (ISDOWN(HS(a2)))
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return (-rflg);
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else
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return (rflg * (HS(a2)->hs_nusers - HS(a1)->hs_nusers));
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}
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/* Uptime comparison. */
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static int
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tcmp(const void *a1, const void *a2)
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{
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return (rflg * (
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(ISDOWN(HS(a2)) ? HS(a2)->hs_wd.wd_recvtime - now
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: HS(a2)->hs_wd.wd_sendtime - HS(a2)->hs_wd.wd_boottime)
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-
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(ISDOWN(HS(a1)) ? HS(a1)->hs_wd.wd_recvtime - now
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: HS(a1)->hs_wd.wd_sendtime - HS(a1)->hs_wd.wd_boottime)
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));
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "usage: ruptime [-alrtu] [host ...]\n");
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exit(1);
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}
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