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/* $OpenBSD: rwho.c,v 1.17 2013/04/16 18:57:39 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. 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.
*/
#include <sys/types.h>
#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>
#include <time.h>
#include <utmp.h>
#include <vis.h>
#include <err.h>
DIR *dirp;
struct whod wd;
#define NUSERS 1000
struct myutmp {
char myhost[MAXHOSTNAMELEN];
int myidle;
struct {
char out_line[9]; /* tty name + NUL */
char out_name[9]; /* user id + NUL */
int32_t out_time; /* time on */
} myutmp;
} myutmp[NUSERS];
int nusers;
int utmpcmp(const void *, const void *);
__dead void usage(void);
#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)
time_t now;
int aflg;
int
main(int argc, char **argv)
{
int ch;
struct dirent *dp;
int cc, width;
struct whod *w = &wd;
struct whoent *we;
struct myutmp *mp;
int f, n, i;
int nhosts = 0;
while ((ch = getopt(argc, argv, "a")) != -1)
switch((char)ch) {
case 'a':
aflg = 1;
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 0)
usage();
if (chdir(_PATH_RWHODIR) || (dirp = opendir(".")) == NULL)
err(1, _PATH_RWHODIR);
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, &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)
errx(1, "too many users");
memcpy(mp->myhost, w->wd_hostname,
sizeof(mp->myhost)-1);
mp->myhost[sizeof(mp->myhost)-1] = '\0';
mp->myidle = we->we_idle;
/*
* Copy we->we_utmp by hand since the name and line
* variables in myutmp have room for NUL (unlike outmp).
*/
memcpy(mp->myutmp.out_line, we->we_utmp.out_line,
sizeof(mp->myutmp.out_line)-1);
mp->myutmp.out_line[sizeof(mp->myutmp.out_line)-1] = 0;
memcpy(mp->myutmp.out_name, we->we_utmp.out_name,
sizeof(mp->myutmp.out_name)-1);
mp->myutmp.out_name[sizeof(mp->myutmp.out_name)-1] = 0;
mp->myutmp.out_time = we->we_utmp.out_time;
nusers++; we++; mp++;
}
(void)close(f);
}
if (nhosts == 0)
errx(0, "no hosts in %s.", _PATH_RWHODIR);
qsort(myutmp, nusers, sizeof(struct myutmp), 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], vis_user[4 * sizeof(mp->myutmp.out_name) + 1];
time_t t;
(void)snprintf(buf, sizeof(buf), "%s:%s", mp->myhost,
mp->myutmp.out_line);
strnvis(vis_user, mp->myutmp.out_name, sizeof vis_user,
VIS_CSTYLE);
t = mp->myutmp.out_time; /* XXX 2038 */
printf("%-*.*s %-*s %.12s",
UT_NAMESIZE, UT_NAMESIZE, vis_user, width, buf,
ctime(&t)+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(const void *v1, const void *v2)
{
int rc;
const struct myutmp *u1 = (struct myutmp *)v1;
const struct myutmp *u2 = (struct myutmp *)v2;
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));
}
void
usage(void)
{
extern char *__progname;
fprintf(stderr, "usage: %s [-a]\n", __progname);
exit(1);
}
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