freebsd-dev/usr.bin/rusers/rusers.c

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/*-
* 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("$FreeBSD$");
#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 <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;
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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
Bring in a hybrid of SunSoft's transport-independent RPC (TI-RPC) and associated changes that had to happen to make this possible as well as bugs fixed along the way. Bring in required TLI library routines to support this. Since we don't support TLI we've essentially copied what NetBSD has done, adding a thin layer to emulate direct the TLI calls into BSD socket calls. This is mostly from Sun's tirpc release that was made in 1994, however some fixes were backported from the 1999 release (supposedly only made available after this porting effort was underway). The submitter has agreed to continue on and bring us up to the 1999 release. Several key features are introduced with this update: Client calls are thread safe. (1999 code has server side thread safe) Updated, a more modern interface. Many userland updates were done to bring the code up to par with the recent RPC API. There is an update to the pthreads library, a function pthread_main_np() was added to emulate a function of Sun's threads library. While we're at it, bring in NetBSD's lockd, it's been far too long of a wait. New rpcbind(8) replaces portmap(8) (supporting communication over an authenticated Unix-domain socket, and by default only allowing set and unset requests over that channel). It's much more secure than the old portmapper. Umount(8), mountd(8), mount_nfs(8), nfsd(8) have also been upgraded to support TI-RPC and to support IPV6. Umount(8) is also fixed to unmount pathnames longer than 80 chars, which are currently truncated by the Kernel statfs structure. Submitted by: Martin Blapp <mb@imp.ch> Manpage review: ru Secure RPC implemented by: wpaul
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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 = (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 == 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');
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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;
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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, xdr_void, NULL,
xdr_utmpidlearr, &up, tv) != RPC_SUCCESS)
errx(1, "%s", clnt_sperror(rusers_clnt, ""));
addr.sin_addr.s_addr = *(int *)hp->h_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, xdr_void, NULL, xdr_utmpidlearr, (char *)&up,
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);
}