NetBSD/usr.bin/rusers/rusers.c

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1993-06-03 23:32:26 +04:00
/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#ifndef lint
static char rcsid[] = "$Id: rusers.c,v 1.4 1993/08/02 17:55:46 mycroft Exp $";
#endif /* not lint */
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#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 <rpcsvc/rnusers.h>
#define MAX_INT 0x7fffffff
#define HOST_WIDTH 20
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#define LINE_WIDTH 15
char *argv0;
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;
}
rusers_reply(char *replyp, struct sockaddr_in *raddrp)
{
int x, idle;
char date[32], idle_time[64], remote[64];
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struct hostent *hp;
utmpidlearr *up = (utmpidlearr *)replyp;
char *host;
int days, hours, minutes, seconds;
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if (search_host(raddrp->sin_addr))
return(0);
if (!allopt && !up->utmpidlearr_len)
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);
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for (x = 0; x < up->utmpidlearr_len; x++) {
strncpy(date,
&(ctime((time_t *)&(up->utmpidlearr_val[x].ui_utmp.ut_time))[4]),
sizeof(date)-1);
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idle = up->utmpidlearr_val[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, "%d:%02d",
minutes, seconds);
if (idle >= (60*60))
sprintf(idle_time, "%d:%02d:%02d",
hours, minutes, seconds);
if (idle >= (24*60*60))
sprintf(idle_time, "%d days, %d:%02d:%02d",
days, hours, minutes, seconds);
}
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strncpy(remote, up->utmpidlearr_val[x].ui_utmp.ut_host, sizeof(remote)-1);
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if (strlen(remote) != 0)
sprintf(remote, "(%.16s)", up->utmpidlearr_val[x].ui_utmp.ut_host);
if (longopt)
printf("%-8.8s %*s:%-*.*s %-12.12s %6s %.18s\n",
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up->utmpidlearr_val[x].ui_utmp.ut_name,
HOST_WIDTH, host,
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LINE_WIDTH, LINE_WIDTH, up->utmpidlearr_val[x].ui_utmp.ut_line,
date,
idle_time,
remote
);
else
printf("%s ",
up->utmpidlearr_val[x].ui_utmp.ut_name);
}
if (!longopt)
putchar('\n');
remember_host(raddrp->sin_addr);
return(0);
}
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, NULL) != RPC_SUCCESS) {
clnt_perror(rusers_clnt, argv0);
exit(1);
}
addr.sin_addr.s_addr = *(int *)hp->h_addr;
rusers_reply((char *)&up, &addr);
}
allhosts()
{
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);
}
}
usage()
{
fprintf(stderr, "Usage: %s [-la] [hosts ...]\n", argv0);
exit(1);
}
main(int argc, char *argv[])
{
int ch;
extern int optind;
if (!(argv0 = rindex(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);
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if (argc == optind)
allhosts();
else {
for (; optind < argc; optind++)
(void) onehost(argv[optind]);
}
exit(0);
}