FreeBSD-5.3/libexec/rpc.rusersd/rusers_proc.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.
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD: src/libexec/rpc.rusersd/rusers_proc.c,v 1.13 2003/06/02 02:35:18 obrien Exp $";
#endif /* not lint */
#ifdef DEBUG
#include <errno.h>
#endif
#include <stdio.h>
#include <string.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <syslog.h>
#include <utmp.h>
#ifdef XIDLE
#include <setjmp.h>
#include <X11/Xlib.h>
#include <X11/extensions/xidle.h>
#endif
#define utmp rutmp
#include <rpcsvc/rnusers.h>
#undef utmp
#define IGNOREUSER "sleeper"
#ifdef OSF
#define _PATH_UTMP UTMP_FILE
#endif
#ifndef _PATH_UTMP
#define _PATH_UTMP "/etc/utmp"
#endif
#ifndef _PATH_DEV
#define _PATH_DEV "/dev"
#endif
#ifndef UT_LINESIZE
#define UT_LINESIZE sizeof(((struct utmp *)0)->ut_line)
#endif
#ifndef UT_NAMESIZE
#define UT_NAMESIZE sizeof(((struct utmp *)0)->ut_name)
#endif
#ifndef UT_HOSTSIZE
#define UT_HOSTSIZE sizeof(((struct utmp *)0)->ut_host)
#endif
typedef char ut_line_t[UT_LINESIZE+1];
typedef char ut_name_t[UT_NAMESIZE+1];
typedef char ut_host_t[UT_HOSTSIZE+1];
utmpidle utmp_idle[MAXUSERS];
rutmp old_utmp[MAXUSERS];
ut_line_t line[MAXUSERS];
ut_name_t name[MAXUSERS];
ut_host_t host[MAXUSERS];
extern int from_inetd;
FILE *ufp;
#ifdef XIDLE
Display *dpy;
static jmp_buf openAbort;
static void
abortOpen(void)
{
longjmp (openAbort, 1);
}
XqueryIdle(char *display)
{
int first_event, first_error;
Time IdleTime;
(void) signal (SIGALRM, abortOpen);
(void) alarm ((unsigned) 10);
if (!setjmp (openAbort)) {
if (!(dpy= XOpenDisplay(display))) {
syslog(LOG_ERR, "Cannot open display %s", display);
return(-1);
}
if (XidleQueryExtension(dpy, &first_event, &first_error)) {
if (!XGetIdleTime(dpy, &IdleTime)) {
syslog(LOG_ERR, "%s: unable to get idle time", display);
return(-1);
}
}
else {
syslog(LOG_ERR, "%s: Xidle extension not loaded", display);
return(-1);
}
XCloseDisplay(dpy);
}
else {
syslog(LOG_ERR, "%s: server grabbed for over 10 seconds", display);
return(-1);
}
(void) signal (SIGALRM, SIG_DFL);
(void) alarm ((unsigned) 0);
IdleTime /= 1000;
return((IdleTime + 30) / 60);
}
#endif
static u_int
getidle(char *tty, char *display)
{
struct stat st;
char devname[PATH_MAX];
time_t now;
u_long idle;
/*
* If this is an X terminal or console, then try the
* XIdle extension
*/
#ifdef XIDLE
if (display && *display && (idle = XqueryIdle(display)) >= 0)
return(idle);
#endif
idle = 0;
if (*tty == 'X') {
u_long kbd_idle, mouse_idle;
#if !defined(__FreeBSD__)
kbd_idle = getidle("kbd", NULL);
#else
kbd_idle = getidle("vga", NULL);
#endif
mouse_idle = getidle("mouse", NULL);
idle = (kbd_idle < mouse_idle)?kbd_idle:mouse_idle;
}
else {
sprintf(devname, "%s/%s", _PATH_DEV, tty);
if (stat(devname, &st) < 0) {
#ifdef DEBUG
printf("%s: %s\n", devname, strerror(errno));
#endif
return(-1);
}
time(&now);
#ifdef DEBUG
printf("%s: now=%d atime=%d\n", devname, now,
st.st_atime);
#endif
idle = now - st.st_atime;
idle = (idle + 30) / 60; /* secs->mins */
}
if (idle < 0) idle = 0;
return(idle);
}
static utmpidlearr *
do_names_2(int all)
{
static utmpidlearr ut;
struct utmp usr;
int nusers = 0;
bzero((char *)&ut, sizeof(ut));
ut.utmpidlearr_val = &utmp_idle[0];
ufp = fopen(_PATH_UTMP, "r");
if (!ufp) {
syslog(LOG_ERR, "%m");
return(&ut);
}
/* only entries with both name and line fields */
while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1 &&
nusers < MAXUSERS)
if (*usr.ut_name && *usr.ut_line &&
strncmp(usr.ut_name, IGNOREUSER,
sizeof(usr.ut_name))
#ifdef OSF
&& usr.ut_type == USER_PROCESS
#endif
) {
utmp_idle[nusers].ui_utmp.ut_time =
usr.ut_time;
utmp_idle[nusers].ui_idle =
getidle(usr.ut_line, usr.ut_host);
utmp_idle[nusers].ui_utmp.ut_line = line[nusers];
strncpy(line[nusers], usr.ut_line, UT_LINESIZE);
utmp_idle[nusers].ui_utmp.ut_name = name[nusers];
strncpy(name[nusers], usr.ut_name, UT_NAMESIZE);
utmp_idle[nusers].ui_utmp.ut_host = host[nusers];
strncpy(host[nusers], usr.ut_host, UT_HOSTSIZE);
/* Make sure entries are NUL terminated */
line[nusers][UT_LINESIZE] =
name[nusers][UT_NAMESIZE] =
host[nusers][UT_HOSTSIZE] = '\0';
nusers++;
}
ut.utmpidlearr_len = nusers;
fclose(ufp);
return(&ut);
}
int *
rusers_num(void)
{
static int num_users = 0;
struct utmp usr;
ufp = fopen(_PATH_UTMP, "r");
if (!ufp) {
syslog(LOG_ERR, "%m");
return(NULL);
}
/* only entries with both name and line fields */
while (fread((char *)&usr, sizeof(usr), 1, ufp) == 1)
if (*usr.ut_name && *usr.ut_line &&
strncmp(usr.ut_name, IGNOREUSER,
sizeof(usr.ut_name))
#ifdef OSF
&& usr.ut_type == USER_PROCESS
#endif
) {
num_users++;
}
fclose(ufp);
return(&num_users);
}
static utmparr *
do_names_1(int all)
{
utmpidlearr *utidle;
static utmparr ut;
int i;
bzero((char *)&ut, sizeof(ut));
utidle = do_names_2(all);
if (utidle) {
ut.utmparr_len = utidle->utmpidlearr_len;
ut.utmparr_val = &old_utmp[0];
for (i = 0; i < ut.utmparr_len; i++)
bcopy(&utmp_idle[i].ui_utmp, &old_utmp[i],
sizeof(old_utmp[0]));
}
return(&ut);
}
utmpidlearr *
rusersproc_names_2_svc(void *argp, struct svc_req *rqstp)
{
return(do_names_2(0));
}
utmpidlearr *
rusersproc_allnames_2_svc(void *argp, struct svc_req *rqstp)
{
return(do_names_2(1));
}
utmparr *
rusersproc_names_1_svc(void *argp, struct svc_req *rqstp)
{
return(do_names_1(0));
}
utmparr *
rusersproc_allnames_1_svc(void *argp, struct svc_req *rqstp)
{
return(do_names_1(1));
}
void
rusers_service(struct svc_req *rqstp, SVCXPRT *transp)
{
union {
int fill;
} argument;
char *result;
bool_t (*xdr_argument)(), (*xdr_result)();
char *(*local)();
switch (rqstp->rq_proc) {
case NULLPROC:
(void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
goto leave;
case RUSERSPROC_NUM:
xdr_argument = xdr_void;
xdr_result = xdr_int;
local = (char *(*)()) rusers_num;
break;
case RUSERSPROC_NAMES:
xdr_argument = xdr_void;
xdr_result = xdr_utmpidlearr;
switch (rqstp->rq_vers) {
case RUSERSVERS_ORIG:
local = (char *(*)()) rusersproc_names_1_svc;
break;
case RUSERSVERS_IDLE:
local = (char *(*)()) rusersproc_names_2_svc;
break;
default:
svcerr_progvers(transp, RUSERSVERS_ORIG, RUSERSVERS_IDLE);
goto leave;
/*NOTREACHED*/
}
break;
case RUSERSPROC_ALLNAMES:
xdr_argument = xdr_void;
xdr_result = xdr_utmpidlearr;
switch (rqstp->rq_vers) {
case RUSERSVERS_ORIG:
local = (char *(*)()) rusersproc_allnames_1_svc;
break;
case RUSERSVERS_IDLE:
local = (char *(*)()) rusersproc_allnames_2_svc;
break;
default:
svcerr_progvers(transp, RUSERSVERS_ORIG, RUSERSVERS_IDLE);
goto leave;
/*NOTREACHED*/
}
break;
default:
svcerr_noproc(transp);
goto leave;
}
bzero(&argument, sizeof(argument));
if (!svc_getargs(transp, (xdrproc_t)xdr_argument, &argument)) {
svcerr_decode(transp);
goto leave;
}
result = (*local)(&argument, rqstp);
if (result != NULL &&
!svc_sendreply(transp, (xdrproc_t)xdr_result, result)) {
svcerr_systemerr(transp);
}
if (!svc_freeargs(transp, (xdrproc_t)xdr_argument, &argument)) {
syslog(LOG_ERR, "unable to free arguments");
exit(1);
}
leave:
if (from_inetd)
exit(0);
}