NetBSD-5.0.2/usr.bin/rusers/rusers.c
/* $NetBSD: rusers.c,v 1.23 2006/05/11 01:25:23 mrg 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: rusers.c,v 1.23 2006/05/11 01:25:23 mrg Exp $");
#endif /* not lint */
#include <sys/types.h>
#include <sys/socket.h>
#include <rpc/rpc.h>
#include <arpa/inet.h>
#include <err.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <utmp.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
struct timeval timeout = { 25, 0 };
int longopt;
int allopt;
void allhosts(void);
int main(int, char *[]);
void onehost(char *);
void remember_host(struct sockaddr *);
int rusers_reply(char *, struct netbuf *, struct netconfig *);
int search_host(struct sockaddr *);
void usage(void);
struct host_list {
struct host_list *next;
int family;
union {
struct in6_addr _addr6;
struct in_addr _addr4;
} addr;
} *hosts;
#define addr6 addr._addr6
#define addr4 addr._addr4
int
search_host(struct sockaddr *sa)
{
struct host_list *hp;
if (!hosts)
return(0);
for (hp = hosts; hp != NULL; hp = hp->next) {
switch (hp->family) {
case AF_INET6:
if (!memcmp(&hp->addr6,
&((struct sockaddr_in6 *)sa)->sin6_addr,
sizeof (struct in6_addr)))
return 1;
break;
case AF_INET:
if (!memcmp(&hp->addr4,
&((struct sockaddr_in *)sa)->sin_addr,
sizeof (struct in_addr)))
return 1;
break;
default:
break;
}
}
return(0);
}
void
remember_host(struct sockaddr *sa)
{
struct host_list *hp;
if (!(hp = (struct host_list *)malloc(sizeof(struct host_list)))) {
err(1, "malloc");
/* NOTREACHED */
}
hp->family = sa->sa_family;
hp->next = hosts;
switch (sa->sa_family) {
case AF_INET6:
memcpy(&hp->addr6, &((struct sockaddr_in6 *)sa)->sin6_addr,
sizeof (struct in6_addr));
break;
case AF_INET:
memcpy(&hp->addr4, &((struct sockaddr_in *)sa)->sin_addr,
sizeof (struct in_addr));
break;
default:
err(1, "unknown address family");
/* NOTREACHED */
}
hosts = hp;
}
int
rusers_reply(char *replyp, struct netbuf *raddrp, struct netconfig *nconf)
{
char host[NI_MAXHOST];
int x;
struct utmpidlearr *up = (struct utmpidlearr *)replyp;
struct sockaddr *sa = raddrp->buf;
if (search_host(sa))
return(0);
if (!allopt && !up->uia_cnt)
return(0);
if (getnameinfo(sa, sa->sa_len, host, sizeof host, NULL, 0, 0))
return 0;
#define HOSTWID (int)sizeof(up->uia_arr[0]->ui_utmp.ut_host)
#define LINEWID (int)sizeof(up->uia_arr[0]->ui_utmp.ut_line)
#define NAMEWID (int)sizeof(up->uia_arr[0]->ui_utmp.ut_name)
if (!longopt)
printf("%-*.*s ", HOSTWID, HOSTWID, host);
for (x = 0; x < up->uia_cnt; x++) {
unsigned int minutes;
char date[26], idle[8];
char remote[HOSTWID + 3]; /* "(" host ")" \0 */
char local[HOSTWID + LINEWID + 2]; /* host ":" line \0 */
time_t uttime;
if (!longopt) {
printf("%.*s ", NAMEWID,
up->uia_arr[x]->ui_utmp.ut_name);
continue;
}
snprintf(local, sizeof(local), "%.*s:%s",
HOSTWID, host,
up->uia_arr[x]->ui_utmp.ut_line);
uttime = up->uia_arr[x]->ui_utmp.ut_time;
snprintf(date, sizeof(date), "%s",
&(ctime(&uttime))[4]);
minutes = up->uia_arr[x]->ui_idle;
if (minutes == MAX_INT)
strcpy(idle, "??");
else if (minutes == 0)
strcpy(idle, "");
else {
unsigned int days, hours;
days = minutes / (24 * 60);
minutes %= (24 * 60);
hours = minutes / 60;
minutes %= 60;
if (days > 0)
snprintf(idle, sizeof(idle), "%d d ", days);
else if (hours > 0)
snprintf(idle, sizeof(idle), "%2d:%02d",
hours, minutes);
else
snprintf(idle, sizeof(idle), ":%02d", minutes);
}
if (up->uia_arr[x]->ui_utmp.ut_host[0] != '\0')
snprintf(remote, sizeof(remote), "(%.*s)",
HOSTWID, up->uia_arr[x]->ui_utmp.ut_host);
else
remote[0] = '\0';
printf("%-*.*s %-*.*s %-12.12s %8.8s %s\n",
NAMEWID, NAMEWID, up->uia_arr[x]->ui_utmp.ut_name,
HOSTWID+LINEWID+1, HOSTWID+LINEWID+1, local,
date, idle, remote);
}
if (!longopt)
putchar('\n');
remember_host(sa);
return(0);
}
void
onehost(char *host)
{
struct utmpidlearr up;
CLIENT *rusers_clnt;
enum clnt_stat clnt_stat;
struct netbuf nb;
struct addrinfo *ai;
int ecode;
rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp");
if (rusers_clnt == NULL) {
clnt_pcreateerror(getprogname());
exit(1);
}
ecode = getaddrinfo(host, NULL, NULL, &ai);
if (ecode != 0)
err(1, "%s", gai_strerror(ecode));
memset((char *)&up, 0, sizeof(up));
clnt_stat = clnt_call(rusers_clnt, RUSERSPROC_NAMES, xdr_void, NULL,
xdr_utmpidlearr, &up, timeout);
if (clnt_stat != RPC_SUCCESS)
errx(1, "%s", clnt_sperrno(clnt_stat));
nb.buf = ai->ai_addr;
nb.len = nb.maxlen = ai->ai_addrlen;
rusers_reply((char *)&up, &nb, NULL);
freeaddrinfo(ai);
}
void
allhosts(void)
{
struct utmpidlearr up;
enum clnt_stat clnt_stat;
memset((char *)&up, 0, sizeof(up));
clnt_stat = rpc_broadcast(RUSERSPROG, RUSERSVERS_IDLE,
RUSERSPROC_NAMES, xdr_void, NULL, xdr_utmpidlearr,
(char *)&up, (resultproc_t)rusers_reply, "udp");
if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT)
errx(1, "%s", clnt_sperrno(clnt_stat));
}
void
usage(void)
{
fprintf(stderr, "usage: %s [-la] [hosts ...]\n", getprogname());
exit(1);
}
int
main(int argc, char *argv[])
{
int ch;
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);
}