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/* $OpenBSD: rwho.c,v 1.6 1997/03/26 18:02:37 deraadt Exp $ */
/*
* Copyright (c) 1983 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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
char copyright[] =
"@(#) Copyright (c) 1983 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
/*static char sccsid[] = "from: @(#)rwho.c 5.5 (Berkeley) 6/1/90";*/
static char rcsid[] = "$OpenBSD: rwho.c,v 1.6 1997/03/26 18:02:37 deraadt Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <sys/file.h>
#include <dirent.h>
#include <protocols/rwhod.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
DIR *dirp;
struct whod wd;
#define NUSERS 1000
struct myutmp {
char myhost[MAXHOSTNAMELEN];
int myidle;
struct outmp myutmp;
} myutmp[NUSERS];
int nusers;
int utmpcmp __P((struct myutmp *, struct myutmp *));
#define WHDRSIZE (sizeof (wd) - sizeof (wd.wd_we))
/*
* this macro should be shared with ruptime.
*/
#define down(w,now) ((now) - (w)->wd_recvtime > 11 * 60)
char *ctime();
time_t now;
int aflg;
int
main(argc, argv)
int argc;
char **argv;
{
extern char *optarg;
extern int optind;
int ch;
struct dirent *dp;
int cc, width;
register struct whod *w = &wd;
register struct whoent *we;
register struct myutmp *mp;
int f, n, i;
time_t time();
int nhosts = 0;
while ((ch = getopt(argc, argv, "a")) != -1)
switch((char)ch) {
case 'a':
aflg = 1;
break;
case '?':
default:
fprintf(stderr, "usage: rwho [-a]\n");
exit(1);
}
if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL) {
perror(_PATH_RWHODIR);
exit(1);
}
mp = myutmp;
(void)time(&now);
while ((dp = readdir(dirp))) {
if (dp->d_ino == 0 || strncmp(dp->d_name, "whod.", 5))
continue;
f = open(dp->d_name, O_RDONLY);
if (f < 0)
continue;
cc = read(f, (char *)&wd, sizeof (struct whod));
if (cc < WHDRSIZE) {
(void) close(f);
continue;
}
nhosts++;
if (down(w,now)) {
(void) close(f);
continue;
}
cc -= WHDRSIZE;
we = w->wd_we;
for (n = cc / sizeof (struct whoent); n > 0; n--) {
if (aflg == 0 && we->we_idle >= 60*60) {
we++;
continue;
}
if (nusers >= NUSERS) {
printf("too many users\n");
exit(1);
}
mp->myutmp = we->we_utmp; mp->myidle = we->we_idle;
(void) strncpy(mp->myhost, w->wd_hostname,
sizeof(mp->myhost)-1);
mp->myhost[sizeof(mp->myhost)-1] = '\0';
nusers++; we++; mp++;
}
(void) close(f);
}
if (nhosts == 0)
errx(0, "no hosts in %s.", _PATH_RWHODIR);
qsort((char *)myutmp, nusers, sizeof (struct myutmp),
(int (*)())utmpcmp);
mp = myutmp;
width = 0;
for (i = 0; i < nusers; i++) {
int j = strlen(mp->myhost) + 1 + strlen(mp->myutmp.out_line);
if (j > width)
width = j;
mp++;
}
mp = myutmp;
for (i = 0; i < nusers; i++) {
char buf[BUFSIZ];
(void)sprintf(buf, "%s:%s", mp->myhost, mp->myutmp.out_line);
printf("%-8.8s %-*s %.12s",
mp->myutmp.out_name,
width,
buf,
ctime((time_t *)&mp->myutmp.out_time)+4);
mp->myidle /= 60;
if (mp->myidle) {
if (aflg) {
if (mp->myidle >= 100*60)
mp->myidle = 100*60 - 1;
if (mp->myidle >= 60)
printf(" %2d", mp->myidle / 60);
else
printf(" ");
} else
printf(" ");
printf(":%02d", mp->myidle % 60);
}
printf("\n");
mp++;
}
exit(0);
}
int
utmpcmp(u1, u2)
struct myutmp *u1, *u2;
{
int rc;
rc = strncmp(u1->myutmp.out_name, u2->myutmp.out_name, 8);
if (rc)
return (rc);
rc = strncmp(u1->myhost, u2->myhost, 8);
if (rc)
return (rc);
return (strncmp(u1->myutmp.out_line, u2->myutmp.out_line, 8));
}
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