7c5d91f72b
by usually being double-spaced due to auto-wrap at column 80. r212771 increased width of the hostname field from 12 to 25. This was supposed to allow for 80-column output with all 3 load averages taking 5 characters each, but it actually gave width exactly 80 and thus worse than useless auto-wrap in that case. 3 wide load average fields are unusual, but later expansion of another field gave the auto-wrap with just 2 wide load average fields. Change to dynamic field widths for all fields except the uptime. This also fixes the formatting of high (above 9999) user counts and not very high (above 9.99) load averages. The formatting for numbers now breaks at 99999.99, but scientific notation should be used starting well below that. The field width for the uptime remains hard-coded to work consistently for uptimes less than 10000 days, but this gives too much space for small uptimes. Punctuation between fields could be improved in many ways, for example by removing it.
319 lines
7.9 KiB
C
319 lines
7.9 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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* 3. 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 iwidth(int);
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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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/* Width to print a small nonnegative integer. */
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static int
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iwidth(int w)
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{
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if (w < 10)
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return (1);
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if (w < 100)
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return (2);
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if (w < 1000)
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return (3);
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if (w < 10000)
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return (4);
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return (5);
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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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int fd, hostnamewidth, i, loadavwidth[3], userswidth, w;
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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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hostnamewidth = 0;
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loadavwidth[0] = 4;
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loadavwidth[1] = 4;
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loadavwidth[2] = 4;
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userswidth = 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 && strcasecmp(wd->wd_hostname, host) != 0)
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continue;
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if (LEFTEARTH(wd->wd_recvtime))
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continue;
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if (hostnamewidth < (int)strlen(wd->wd_hostname))
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hostnamewidth = (int)strlen(wd->wd_hostname);
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for (i = 0; i < 3; i++) {
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w = iwidth(wd->wd_loadav[i] / 100) + 3;
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if (loadavwidth[i] < w)
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loadavwidth[i] = w;
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}
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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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if (userswidth < iwidth(hsp->hs_nusers))
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userswidth = iwidth(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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w = userswidth + loadavwidth[0] + loadavwidth[1] + loadavwidth[2];
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if (hostnamewidth + w > 41)
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hostnamewidth = 41 - w; /* limit to 79 cols */
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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("%-*.*s%s\n",
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hostnamewidth, hostnamewidth, 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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"%-*.*s %s, %*d user%s load %*.2f, %*.2f, %*.2f\n",
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hostnamewidth, hostnamewidth, 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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userswidth, hsp->hs_nusers,
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hsp->hs_nusers == 1 ? ", " : "s,",
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loadavwidth[0], wd->wd_loadav[0] / 100.0,
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loadavwidth[1], wd->wd_loadav[1] / 100.0,
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loadavwidth[2], 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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