268 lines
6.3 KiB
C
268 lines
6.3 KiB
C
/*-
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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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#ifndef lint
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static char rcsid[] = "$Id: rusers.c,v 1.11 1996/03/21 18:00:35 jtc Exp $";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <strings.h>
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#include <rpc/rpc.h>
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#include <arpa/inet.h>
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#include <utmp.h>
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#include <stdlib.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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#define HOST_WIDTH 20
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#define LINE_WIDTH 8
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char *argv0;
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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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struct host_list {
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struct host_list *next;
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struct in_addr addr;
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} *hosts;
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int
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search_host(struct in_addr addr)
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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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if (hp->addr.s_addr == addr.s_addr)
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return(1);
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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 in_addr addr)
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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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fprintf(stderr, "%s: no memory.\n", argv0);
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exit(1);
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}
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hp->addr.s_addr = addr.s_addr;
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hp->next = hosts;
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hosts = hp;
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}
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int
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rusers_reply(char *replyp, struct sockaddr_in *raddrp)
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{
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int x, idle;
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char date[32], idle_time[64], remote[64], local[64];
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struct hostent *hp;
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struct utmpidlearr *up = (struct utmpidlearr *)replyp;
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char *host;
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int days, hours, minutes, seconds;
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if (search_host(raddrp->sin_addr))
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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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hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr,
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sizeof(struct in_addr), AF_INET);
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if (hp)
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host = hp->h_name;
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else
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host = inet_ntoa(raddrp->sin_addr);
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if (!longopt)
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printf("%-*.*s ", HOST_WIDTH, HOST_WIDTH, host);
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for (x = 0; x < up->uia_cnt; x++) {
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strncpy(date,
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&(ctime((time_t *)&(up->uia_arr[x]->ui_utmp.ut_time))[4]),
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sizeof(date)-1);
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idle = up->uia_arr[x]->ui_idle;
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sprintf(idle_time, " :%02d", idle);
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if (idle == MAX_INT)
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strcpy(idle_time, "??");
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else if (idle == 0)
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strcpy(idle_time, "");
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else {
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seconds = idle;
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days = seconds/(60*60*24);
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seconds %= (60*60*24);
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hours = seconds/(60*60);
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seconds %= (60*60);
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minutes = seconds/60;
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seconds %= 60;
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if (idle > 60)
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sprintf(idle_time, "%2d:%02d",
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minutes, seconds);
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if (idle >= (60*60))
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sprintf(idle_time, "%2d:%02d:%02d",
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hours, minutes, seconds);
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if (idle >= (24*60*60))
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sprintf(idle_time, "%d days, %d:%02d:%02d",
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days, hours, minutes, seconds);
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}
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strncpy(remote, up->uia_arr[x]->ui_utmp.ut_host,
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sizeof(remote)-1);
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if (strlen(remote) != 0)
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sprintf(remote, "(%.16s)",
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up->uia_arr[x]->ui_utmp.ut_host);
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if (longopt) {
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strncpy(local, host, sizeof(local));
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local[HOST_WIDTH + LINE_WIDTH + 1 -
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strlen(up->uia_arr[x]->ui_utmp.ut_line) - 1] = 0;
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strcat(local, ":");
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strcat(local, up->uia_arr[x]->ui_utmp.ut_line);
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printf("%-8.8s %-*.*s %-12.12s %8s %.18s\n",
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up->uia_arr[x]->ui_utmp.ut_name,
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HOST_WIDTH+LINE_WIDTH+1, HOST_WIDTH+LINE_WIDTH+1, local,
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date,
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idle_time,
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remote);
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} else
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printf("%0.8s ",
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up->uia_arr[x]->ui_utmp.ut_name);
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}
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if (!longopt)
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putchar('\n');
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remember_host(raddrp->sin_addr);
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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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struct sockaddr_in addr;
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struct hostent *hp;
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hp = gethostbyname(host);
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if (hp == NULL) {
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fprintf(stderr, "%s: unknown host \"%s\"\n",
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argv0, host);
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exit(1);
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}
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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(argv0);
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exit(1);
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}
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bzero((char *)&up, sizeof(up));
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if (clnt_call(rusers_clnt, RUSERSPROC_NAMES, xdr_void, NULL,
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xdr_utmpidlearr, &up, timeout) != RPC_SUCCESS) {
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clnt_perror(rusers_clnt, argv0);
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exit(1);
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}
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addr.sin_addr.s_addr = *(int *)hp->h_addr;
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rusers_reply((char *)&up, &addr);
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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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bzero((char *)&up, sizeof(up));
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clnt_stat = clnt_broadcast(RUSERSPROG, RUSERSVERS_IDLE,
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RUSERSPROC_NAMES, xdr_void, NULL, xdr_utmpidlearr,
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&up, rusers_reply);
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if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT) {
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fprintf(stderr, "%s: %s\n", argv0, clnt_sperrno(clnt_stat));
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exit(1);
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}
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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", argv0);
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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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extern int optind;
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if (!(argv0 = rindex(argv[0], '/')))
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argv0 = argv[0];
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else
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argv0++;
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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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