252 lines
6.0 KiB
C
252 lines
6.0 KiB
C
/* $NetBSD: rwho.c,v 1.19 2009/04/13 07:11:37 lukem Exp $ */
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/*
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* Copyright (c) 1983, 1993
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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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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1983, 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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/*static char sccsid[] = "from: @(#)rwho.c 8.1 (Berkeley) 6/6/93";*/
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__RCSID("$NetBSD: rwho.c,v 1.19 2009/04/13 07:11:37 lukem Exp $");
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/file.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 <locale.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 <fcntl.h>
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#include <unistd.h>
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#include <utmp.h>
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#include <sysexits.h>
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static void usage(void) __dead;
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static int utmpcmp(const void *, const void *);
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/*
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* this macro should be shared with ruptime.
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*/
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#define DOWN(w,now) ((now) - (w).wd_recvtime > 11 * 60)
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#define WHDRSIZE (sizeof(struct whod) - \
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sizeof (((struct whod *)NULL)->wd_we))
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struct my_utmp {
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char myhost[MAXHOSTNAMELEN];
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int myidle;
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struct outmp myutmp;
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};
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int
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main(int argc, char **argv)
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{
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DIR *dirp;
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struct dirent *dp;
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struct whoent *we;
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struct whod wd;
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struct my_utmp *mp, *start;
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time_t now;
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int ch;
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size_t width, n, i, nhosts, nusers, namount;
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int aflg, qflg, hflg;
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setprogname(argv[0]);
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(void)setlocale(LC_TIME, "");
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aflg = nusers = nhosts = qflg = hflg = 0;
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namount = 40;
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start = NULL;
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now = 0;
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while ((ch = getopt(argc, argv, "aHq")) != -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 'q':
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qflg = 1;
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break;
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case 'H':
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hflg = 1;
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break;
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default:
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usage();
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}
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if(optind != argc)
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usage();
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if (qflg) {
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aflg = 0;
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hflg = 0;
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}
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if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL)
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err(EXIT_FAILURE, "Cannot access `%s'", _PATH_RWHODIR);
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(void)time(&now);
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if ((start = malloc(sizeof(*start) * namount)) == NULL)
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err(EXIT_FAILURE, "malloc");
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while ((dp = readdir(dirp)) != NULL) {
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int f;
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ssize_t cc;
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if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
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continue;
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f = open(dp->d_name, O_RDONLY);
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if (f < 0)
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continue;
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cc = read(f, &wd, sizeof (wd));
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if (cc < (ssize_t)WHDRSIZE) {
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(void)close(f);
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continue;
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}
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nhosts++;
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if (DOWN(wd, now)) {
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(void)close(f);
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continue;
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}
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cc -= WHDRSIZE;
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we = wd.wd_we;
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for (n = cc / sizeof (struct whoent); n > 0; n--) {
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if (aflg == 0 && we->we_idle >= 60*60) {
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we++;
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continue;
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}
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if (nusers == namount) {
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namount = namount + 40;
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if ((start = realloc(start,
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sizeof(struct my_utmp) * namount)) == NULL)
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err(1, "realloc");
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}
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mp = start + nusers;
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mp->myutmp = we->we_utmp;
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mp->myidle = we->we_idle;
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(void)strcpy(mp->myhost, wd.wd_hostname);
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nusers++; we++; mp++;
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}
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(void)close(f);
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}
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if (nhosts == 0)
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errx(EX_OK, "No hosts in `%s'.", _PATH_RWHODIR);
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mp = start;
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qsort(start, nusers, sizeof(*start), utmpcmp);
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width = 0;
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for (i = 0; i < nusers; i++) {
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size_t j = strlen(mp->myhost) + 1 + strlen(mp->myutmp.out_line);
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if (j > width)
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width = j;
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mp++;
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}
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mp = start;
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if (hflg) {
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(void)printf("%-*.*s %-*s %-12s %-*s\n", UT_NAMESIZE,
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UT_NAMESIZE, "USER", (int)width, "LINE", "WHEN",
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(int)width, "IDLE");
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}
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for (i = 0; i < nusers; i++) {
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char buf[BUFSIZ], cbuf[80];
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time_t t;
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if (qflg) {
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(void)printf("%-*.*s\n", UT_NAMESIZE, UT_NAMESIZE,
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mp->myutmp.out_name);
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mp++;
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continue;
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}
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t = mp->myutmp.out_time;
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(void)strftime(cbuf, sizeof(cbuf), "%c", localtime(&t));
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(void)snprintf(buf, sizeof(buf), "%s:%s", mp->myhost,
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mp->myutmp.out_line);
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(void)printf("%-*.*s %-*s %.12s", UT_NAMESIZE, UT_NAMESIZE,
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mp->myutmp.out_name, (int)width, buf, cbuf + 4);
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mp->myidle /= 60;
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if (mp->myidle) {
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if (aflg) {
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if (mp->myidle >= 100 * 60)
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mp->myidle = 100 * 60 - 1;
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if (mp->myidle >= 60)
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(void)printf(" %2d", mp->myidle / 60);
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else
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(void)printf(" ");
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} else
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(void)printf(" ");
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(void)printf(":%02d", mp->myidle % 60);
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}
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(void)printf("\n");
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mp++;
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}
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if (qflg)
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(void)printf("# users = %zd\n", nusers);
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return EX_OK;
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}
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static int
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utmpcmp(const void *v1, const void *v2)
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{
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const struct my_utmp *u1, *u2;
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int rc;
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u1 = v1;
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u2 = v2;
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rc = strncmp(u1->myutmp.out_name, u2->myutmp.out_name, 8);
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if (rc)
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return rc;
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rc = strcmp(u1->myhost, u2->myhost);
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if (rc)
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return rc;
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return strncmp(u1->myutmp.out_line, u2->myutmp.out_line, 8);
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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: %s [-aHq]\n", getprogname());
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exit(1);
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}
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