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/* $OpenBSD: rusers.c,v 1.5 1997/01/17 07:13:15 millert Exp $ */
/*-
* Copyright (c) 1993 John Brezak
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR `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 AUTHOR 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
static char rcsid[] = "$OpenBSD: rusers.c,v 1.5 1997/01/17 07:13:15 millert Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdio.h>
#include <strings.h>
#include <rpc/rpc.h>
#include <arpa/inet.h>
#include <utmp.h>
#include <stdlib.h>
/*
* For now we only try version 2 of the protocol. The current
* version is 3 (rusers.h), but only Solaris and NetBSD seem
* to support it currently.
*/
#include <rpcsvc/rnusers.h> /* Old version */
#define MAX_INT 0x7fffffff
#define HOST_WIDTH 20
#define LINE_WIDTH 8
char *argv0;
struct timeval timeout = { 25, 0 };
int longopt;
int allopt;
struct host_list {
struct host_list *next;
struct in_addr addr;
} *hosts;
int
search_host(struct in_addr addr)
{
struct host_list *hp;
if (!hosts)
return(0);
for (hp = hosts; hp != NULL; hp = hp->next) {
if (hp->addr.s_addr == addr.s_addr)
return(1);
}
return(0);
}
void
remember_host(struct in_addr addr)
{
struct host_list *hp;
if (!(hp = (struct host_list *)malloc(sizeof(struct host_list)))) {
fprintf(stderr, "%s: no memory.\n", argv0);
exit(1);
}
hp->addr.s_addr = addr.s_addr;
hp->next = hosts;
hosts = hp;
}
int
rusers_reply(char *replyp, struct sockaddr_in *raddrp)
{
int x, idle;
char date[32], idle_time[64], remote[64], local[64];
struct hostent *hp;
utmpidlearr *up = (utmpidlearr *)replyp;
char *host;
int days, hours, minutes, seconds;
if (search_host(raddrp->sin_addr))
return(0);
if (!allopt && !up->uia_cnt)
return(0);
hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr,
sizeof(struct in_addr), AF_INET);
if (hp)
host = hp->h_name;
else
host = inet_ntoa(raddrp->sin_addr);
if (!longopt)
printf("%-*.*s ", HOST_WIDTH, HOST_WIDTH, host);
for (x = 0; x < up->uia_cnt; x++) {
strncpy(date,
&(ctime((time_t *)&(up->uia_arr[x]->ui_utmp.ut_time))[4]),
sizeof(date)-1);
idle = up->uia_arr[x]->ui_idle;
sprintf(idle_time, " :%02d", idle);
if (idle == MAX_INT)
strcpy(idle_time, "??");
else if (idle == 0)
strcpy(idle_time, "");
else {
seconds = idle;
days = seconds/(60*60*24);
seconds %= (60*60*24);
hours = seconds/(60*60);
seconds %= (60*60);
minutes = seconds/60;
seconds %= 60;
if (idle > 60)
sprintf(idle_time, "%2d:%02d",
minutes, seconds);
if (idle >= (60*60))
sprintf(idle_time, "%2d:%02d:%02d",
hours, minutes, seconds);
if (idle >= (24*60*60))
sprintf(idle_time, "%d days, %d:%02d:%02d",
days, hours, minutes, seconds);
}
strncpy(remote, up->uia_arr[x]->ui_utmp.ut_host,
sizeof(remote)-1);
if (strlen(remote) != 0)
sprintf(remote, "(%.16s)",
up->uia_arr[x]->ui_utmp.ut_host);
if (longopt) {
strncpy(local, host, sizeof(local));
local[HOST_WIDTH + LINE_WIDTH + 1 -
strlen(up->uia_arr[x]->ui_utmp.ut_line) - 1] = 0;
strcat(local, ":");
strcat(local, up->uia_arr[x]->ui_utmp.ut_line);
printf("%-8.8s %-*.*s %-12.12s %8s %.18s\n",
up->uia_arr[x]->ui_utmp.ut_name,
HOST_WIDTH+LINE_WIDTH+1, HOST_WIDTH+LINE_WIDTH+1,
local, date, idle_time, remote);
} else
printf("%0.8s ",
up->uia_arr[x]->ui_utmp.ut_name);
}
if (!longopt)
putchar('\n');
remember_host(raddrp->sin_addr);
return(0);
}
void
onehost(char *host)
{
utmpidlearr up;
CLIENT *rusers_clnt;
struct sockaddr_in addr;
struct hostent *hp;
hp = gethostbyname(host);
if (hp == NULL) {
fprintf(stderr, "%s: unknown host \"%s\"\n",
argv0, host);
exit(1);
}
rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp");
if (rusers_clnt == NULL) {
clnt_pcreateerror(argv0);
exit(1);
}
bzero((char *)&up, sizeof(up));
if (clnt_call(rusers_clnt, RUSERSPROC_NAMES, xdr_void, NULL,
xdr_utmpidlearr, &up, timeout) != RPC_SUCCESS) {
clnt_perror(rusers_clnt, argv0);
exit(1);
}
addr.sin_addr.s_addr = *(int *)hp->h_addr;
rusers_reply((char *)&up, &addr);
}
void
allhosts(void)
{
utmpidlearr up;
enum clnt_stat clnt_stat;
bzero((char *)&up, sizeof(up));
clnt_stat = clnt_broadcast(RUSERSPROG, RUSERSVERS_IDLE,
RUSERSPROC_NAMES, xdr_void, NULL, xdr_utmpidlearr,
&up, rusers_reply);
if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT) {
fprintf(stderr, "%s: %s\n", argv0, clnt_sperrno(clnt_stat));
exit(1);
}
}
void
usage(void)
{
fprintf(stderr, "Usage: %s [-la] [hosts ...]\n", argv0);
exit(1);
}
int
main(int argc, char *argv[])
{
int ch;
extern int optind;
if (!(argv0 = strrchr(argv[0], '/')))
argv0 = argv[0];
else
argv0++;
while ((ch = getopt(argc, argv, "al")) != -1)
switch (ch) {
case 'a':
allopt++;
break;
case 'l':
longopt++;
break;
default:
usage();
/*NOTREACHED*/
}
setlinebuf(stdout);
if (argc == optind)
allhosts();
else {
for (; optind < argc; optind++)
(void) onehost(argv[optind]);
}
exit(0);
}
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