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