303 lines
7.2 KiB
C
303 lines
7.2 KiB
C
/* $NetBSD: rusers.c,v 1.21 2001/02/19 23:03:51 cgd Exp $ */
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/*-
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* Copyright (c) 1993 John Brezak
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: rusers.c,v 1.21 2001/02/19 23:03:51 cgd Exp $");
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <rpc/rpc.h>
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#include <arpa/inet.h>
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#include <err.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <utmp.h>
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/*
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* For now we only try version 2 of the protocol. The current
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* version is 3 (rusers.h), but only Solaris and NetBSD seem
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* to support it currently.
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*/
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#include <rpcsvc/rnusers.h> /* Old version */
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#define MAX_INT 0x7fffffff
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struct timeval timeout = { 25, 0 };
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int longopt;
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int allopt;
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void allhosts(void);
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int main(int, char *[]);
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void onehost(char *);
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void remember_host(struct sockaddr *);
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int rusers_reply(char *, struct netbuf *, struct netconfig *);
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int search_host(struct sockaddr *);
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void usage(void);
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struct host_list {
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struct host_list *next;
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int family;
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union {
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struct in6_addr _addr6;
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struct in_addr _addr4;
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} addr;
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} *hosts;
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#define addr6 addr._addr6
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#define addr4 addr._addr4
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int
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search_host(struct sockaddr *sa)
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{
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struct host_list *hp;
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if (!hosts)
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return(0);
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for (hp = hosts; hp != NULL; hp = hp->next) {
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switch (hp->family) {
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case AF_INET6:
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if (!memcmp(&hp->addr6,
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&((struct sockaddr_in6 *)sa)->sin6_addr,
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sizeof (struct in6_addr)))
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return 1;
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break;
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case AF_INET:
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if (!memcmp(&hp->addr4,
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&((struct sockaddr_in *)sa)->sin_addr,
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sizeof (struct in_addr)))
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return 1;
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break;
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default:
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break;
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}
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}
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return(0);
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}
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void
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remember_host(struct sockaddr *sa)
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{
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struct host_list *hp;
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if (!(hp = (struct host_list *)malloc(sizeof(struct host_list)))) {
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err(1, "malloc");
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/* NOTREACHED */
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}
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hp->family = sa->sa_family;
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hp->next = hosts;
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switch (sa->sa_family) {
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case AF_INET6:
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memcpy(&hp->addr6, &((struct sockaddr_in6 *)sa)->sin6_addr,
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sizeof (struct in6_addr));
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break;
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case AF_INET:
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memcpy(&hp->addr4, &((struct sockaddr_in *)sa)->sin_addr,
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sizeof (struct in_addr));
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break;
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default:
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err(1, "unknown address family");
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/* NOTREACHED */
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}
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hosts = hp;
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}
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int
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rusers_reply(char *replyp, struct netbuf *raddrp, struct netconfig *nconf)
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{
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char host[NI_MAXHOST];
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int x;
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struct utmpidlearr *up = (struct utmpidlearr *)replyp;
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struct sockaddr *sa = raddrp->buf;
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if (search_host(sa))
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return(0);
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if (!allopt && !up->uia_cnt)
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return(0);
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if (getnameinfo(sa, sa->sa_len, host, sizeof host, NULL, 0, 0))
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return 0;
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#define HOSTWID (int)sizeof(up->uia_arr[0]->ui_utmp.ut_host)
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#define LINEWID (int)sizeof(up->uia_arr[0]->ui_utmp.ut_line)
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#define NAMEWID (int)sizeof(up->uia_arr[0]->ui_utmp.ut_name)
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if (!longopt)
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printf("%-*.*s ", HOSTWID, HOSTWID, host);
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for (x = 0; x < up->uia_cnt; x++) {
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unsigned int minutes;
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char date[26], idle[8];
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char remote[HOSTWID + 3]; /* "(" host ")" \0 */
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char local[HOSTWID + LINEWID + 2]; /* host ":" line \0 */
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if (!longopt) {
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printf("%.*s ", NAMEWID,
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up->uia_arr[x]->ui_utmp.ut_name);
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continue;
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}
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snprintf(local, sizeof(local), "%.*s:%s",
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HOSTWID, host,
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up->uia_arr[x]->ui_utmp.ut_line);
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snprintf(date, sizeof(date), "%s",
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&(ctime((time_t *)&(up->uia_arr[x]->ui_utmp.ut_time)))[4]);
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minutes = up->uia_arr[x]->ui_idle;
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if (minutes == MAX_INT)
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strcpy(idle, "??");
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else if (minutes == 0)
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strcpy(idle, "");
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else {
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unsigned int days, hours;
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days = minutes / (24 * 60);
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minutes %= (24 * 60);
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hours = minutes / 60;
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minutes %= 60;
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if (days > 0)
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snprintf(idle, sizeof(idle), "%d d ", days);
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else if (hours > 0)
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snprintf(idle, sizeof(idle), "%2d:%02d",
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hours, minutes);
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else
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snprintf(idle, sizeof(idle), ":%02d", minutes);
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}
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if (up->uia_arr[x]->ui_utmp.ut_host[0] != '\0')
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snprintf(remote, sizeof(remote), "(%.*s)",
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HOSTWID, up->uia_arr[x]->ui_utmp.ut_host);
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else
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remote[0] = '\0';
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printf("%-*.*s %-*.*s %-12.12s %8.8s %s\n",
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NAMEWID, NAMEWID, up->uia_arr[x]->ui_utmp.ut_name,
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HOSTWID+LINEWID+1, HOSTWID+LINEWID+1, local,
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date, idle, remote);
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}
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if (!longopt)
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putchar('\n');
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remember_host(sa);
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return(0);
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}
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void
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onehost(char *host)
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{
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struct utmpidlearr up;
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CLIENT *rusers_clnt;
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enum clnt_stat clnt_stat;
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struct netbuf nb;
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struct addrinfo *ai;
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int ecode;
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rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp");
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if (rusers_clnt == NULL) {
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clnt_pcreateerror(getprogname());
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exit(1);
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}
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ecode = getaddrinfo(host, NULL, NULL, &ai);
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if (ecode != 0)
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err(1, "%s", gai_strerror(ecode));
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memset((char *)&up, 0, sizeof(up));
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clnt_stat = clnt_call(rusers_clnt, RUSERSPROC_NAMES, xdr_void, NULL,
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xdr_utmpidlearr, &up, timeout);
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if (clnt_stat != RPC_SUCCESS)
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errx(1, "%s", clnt_sperrno(clnt_stat));
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nb.buf = ai->ai_addr;
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nb.len = nb.maxlen = ai->ai_addrlen;
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rusers_reply((char *)&up, &nb, NULL);
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freeaddrinfo(ai);
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}
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void
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allhosts(void)
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{
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struct utmpidlearr up;
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enum clnt_stat clnt_stat;
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memset((char *)&up, 0, sizeof(up));
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clnt_stat = rpc_broadcast(RUSERSPROG, RUSERSVERS_IDLE,
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RUSERSPROC_NAMES, xdr_void, NULL, xdr_utmpidlearr,
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(char *)&up, (resultproc_t)rusers_reply, "udp");
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if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT)
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errx(1, "%s", clnt_sperrno(clnt_stat));
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}
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void
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usage(void)
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{
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fprintf(stderr, "Usage: %s [-la] [hosts ...]\n", getprogname());
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exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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int ch;
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while ((ch = getopt(argc, argv, "al")) != -1)
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switch (ch) {
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case 'a':
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allopt++;
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break;
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case 'l':
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longopt++;
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break;
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default:
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usage();
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/*NOTREACHED*/
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}
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setlinebuf(stdout);
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if (argc == optind)
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allhosts();
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else {
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for (; optind < argc; optind++)
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(void) onehost(argv[optind]);
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}
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exit(0);
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}
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