FreeBSD-5.3/usr.bin/rusers/rusers.c
/*-
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/rusers/rusers.c,v 1.16 2004/05/19 21:34:52 dwmalone Exp $");
#include <sys/types.h>
#include <sys/socket.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpcsvc/rnusers.h>
#include <arpa/inet.h>
#include <err.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <timeconv.h>
#include <unistd.h>
#define MAX_INT 0x7fffffff
#define HOST_WIDTH 20
#define LINE_WIDTH 15
int longopt;
int allopt;
struct host_list {
struct host_list *next;
struct in_addr addr;
} *hosts;
static int
search_host(struct in_addr addr)
{
struct host_list *hp;
if (hosts == NULL)
return (0);
for (hp = hosts; hp != NULL; hp = hp->next) {
if (hp->addr.s_addr == addr.s_addr)
return (1);
}
return (0);
}
static void
remember_host(struct in_addr addr)
{
struct host_list *hp;
if ((hp = (struct host_list *)malloc(sizeof(struct host_list))) == NULL)
errx(1, "no memory");
hp->addr.s_addr = addr.s_addr;
hp->next = hosts;
hosts = hp;
}
static int
rusers_reply(caddr_t replyp, struct sockaddr_in *raddrp)
{
u_int x;
int idle;
char date[32], idle_time[64], remote[64];
struct hostent *hp;
utmpidlearr *up, u;
char *host;
int days, hours, minutes, seconds;
up = &u;
memcpy(up, replyp, sizeof(*up));
if (search_host(raddrp->sin_addr))
return (0);
if (!allopt && up->utmpidlearr_len == 0)
return (0);
hp = gethostbyaddr((char *)&raddrp->sin_addr.s_addr,
sizeof(struct in_addr), AF_INET);
if (hp != NULL)
host = hp->h_name;
else
host = inet_ntoa(raddrp->sin_addr);
if (!longopt)
printf("%-*s ", HOST_WIDTH, host);
for (x = 0; x < up->utmpidlearr_len; x++) {
time_t t = _int_to_time(up->utmpidlearr_val[x].ui_utmp.ut_time);
strncpy(date, &(ctime(&t)[4]), sizeof(date) - 1);
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);
}
strncpy(remote, up->utmpidlearr_val[x].ui_utmp.ut_host,
sizeof(remote) - 1);
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",
up->utmpidlearr_val[x].ui_utmp.ut_name,
HOST_WIDTH, host, 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);
}
static void
onehost(char *host)
{
utmpidlearr up;
CLIENT *rusers_clnt;
struct sockaddr_in addr;
struct hostent *hp;
struct timeval tv;
hp = gethostbyname(host);
if (hp == NULL)
errx(1, "unknown host \"%s\"", host);
rusers_clnt = clnt_create(host, RUSERSPROG, RUSERSVERS_IDLE, "udp");
if (rusers_clnt == NULL)
errx(1, "%s", clnt_spcreateerror(""));
bzero((char *)&up, sizeof(up));
tv.tv_sec = 15; /* XXX ?? */
tv.tv_usec = 0;
if (clnt_call(rusers_clnt, RUSERSPROC_NAMES, (xdrproc_t)xdr_void, NULL,
(xdrproc_t)xdr_utmpidlearr, &up, tv) != RPC_SUCCESS)
errx(1, "%s", clnt_sperror(rusers_clnt, ""));
memcpy(&addr.sin_addr.s_addr, hp->h_addr, sizeof(addr.sin_addr.s_addr));
rusers_reply((caddr_t)&up, &addr);
clnt_destroy(rusers_clnt);
}
static void
allhosts(void)
{
utmpidlearr up;
enum clnt_stat clnt_stat;
bzero((char *)&up, sizeof(up));
clnt_stat = clnt_broadcast(RUSERSPROG, RUSERSVERS_IDLE,
RUSERSPROC_NAMES, (xdrproc_t)xdr_void, NULL,
(xdrproc_t)xdr_utmpidlearr, (char *)&up,
(resultproc_t)rusers_reply);
if (clnt_stat != RPC_SUCCESS && clnt_stat != RPC_TIMEDOUT)
errx(1, "%s", clnt_sperrno(clnt_stat));
}
static void
usage(void)
{
fprintf(stderr, "usage: rusers [-la] [hosts ...]\n");
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);
}