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NetBSD/libexec/rpc.rusersd/rusers_proc.c

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/* $NetBSD: rusers_proc.c,v 1.22 2000/06/03 19:06:25 fvdl Exp $ */
/*-
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR `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 AUTHOR 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>
#ifndef lint
__RCSID("$NetBSD: rusers_proc.c,v 1.22 2000/06/03 19:06:25 fvdl Exp $");
#endif /* not lint */
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <signal.h>
#include <syslog.h>
#include <utmp.h>
#include <rpc/rpc.h>
#include "rusers_proc.h"
#ifdef XIDLE
#include <setjmp.h>
#include <X11/Xlib.h>
#include <X11/extensions/xidle.h>
#endif
#include <rpcsvc/rusers.h> /* New version */
#include <rpcsvc/rnusers.h> /* Old version */
#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];
typedef char ut_name_t[UT_NAMESIZE];
typedef char ut_host_t[UT_HOSTSIZE];
static struct rusers_utmp utmps[MAXUSERS];
static struct utmpidle *utmp_idlep[MAXUSERS];
static struct utmpidle utmp_idle[MAXUSERS];
static ut_line_t line[MAXUSERS];
static ut_name_t name[MAXUSERS];
static ut_host_t host[MAXUSERS];
extern int from_inetd;
static int getidle(char *, char *);
static int *rusers_num_svc(void *, struct svc_req *);
static utmp_array *do_names_3(int);
static struct utmpidlearr *do_names_2(int);
/* XXX */
struct utmpidlearr *rusersproc_names_2_svc(void *, struct svc_req *);
struct utmpidlearr *rusersproc_allnames_2_svc(void *, struct svc_req *);
#ifdef XIDLE
static Display *dpy;
static sigjmp_buf openAbort;
static int XqueryIdle __P((char *));
static void abortOpen __P((int));
static void
abortOpen(int n)
{
siglongjmp(openAbort, 1);
}
static int
XqueryIdle(char *display)
{
int first_event, first_error;
Time IdleTime;
(void) signal(SIGALRM, abortOpen);
(void) alarm(10);
if (!sigsetjmp(openAbort, 0)) {
if ((dpy = XOpenDisplay(display)) == NULL) {
syslog(LOG_DEBUG, "cannot open display %s", display);
return (-1);
}
if (XidleQueryExtension(dpy, &first_event, &first_error)) {
if (!XGetIdleTime(dpy, &IdleTime)) {
syslog(LOG_DEBUG, "%s: unable to get idle time",
display);
return (-1);
}
} else {
syslog(LOG_DEBUG, "%s: Xidle extension not loaded",
display);
return (-1);
}
XCloseDisplay(dpy);
} else {
syslog(LOG_DEBUG, "%s: server grabbed for over 10 seconds",
display);
return (-1);
}
(void) alarm(0);
(void) signal(SIGALRM, SIG_DFL);
IdleTime /= 1000;
return ((IdleTime + 30) / 60);
}
#endif /* XIDLE */
static int
getidle(char *tty, char *display)
{
struct stat st;
char devname[PATH_MAX];
time_t now;
long idle;
/*
* If this is an X terminal or console, then try the
* XIdle extension
*/
#ifdef XIDLE
if (display && *display && strchr(display, ':') != NULL &&
(idle = XqueryIdle(display)) >= 0)
return (idle);
#endif
idle = 0;
if (*tty == 'X') {
long kbd_idle, mouse_idle;
#if !defined(i386)
kbd_idle = getidle("kbd", NULL);
#else
/*
* XXX Icky i386 console hack.
*/
kbd_idle = getidle("vga", NULL);
#endif
mouse_idle = getidle("mouse", NULL);
idle = (kbd_idle < mouse_idle) ? kbd_idle : mouse_idle;
} else {
snprintf(devname, sizeof devname, "%s/%s", _PATH_DEV, tty);
if (stat(devname, &st) == -1) {
syslog(LOG_WARNING, "Cannot stat %s (%m)", devname);
return 0;
}
(void)time(&now);
#ifdef DEBUG
printf("%s: now=%ld atime=%ld\n", devname,
(long)now, (long)st.st_atime);
#endif
idle = now - st.st_atime;
idle = (idle + 30) / 60; /* secs->mins */
}
if (idle < 0)
idle = 0;
return idle;
}
static int *
rusers_num_svc(void *arg, struct svc_req *rqstp)
{
static int num_users = 0;
struct utmp usr;
FILE *ufp;
ufp = fopen(_PATH_UTMP, "r");
if (!ufp) {
syslog(LOG_ERR, "%m");
return (0);
}
/* 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 utmp_array *
do_names_3(int all)
{
static utmp_array ut;
struct utmp usr;
int nusers = 0;
FILE *ufp;
memset(&ut, 0, sizeof(ut));
ut.utmp_array_val = &utmps[0];
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 &&
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
) {
utmps[nusers].ut_type = RUSERS_USER_PROCESS;
utmps[nusers].ut_time =
usr.ut_time;
utmps[nusers].ut_idle =
getidle(usr.ut_line, usr.ut_host);
utmps[nusers].ut_line = line[nusers];
strncpy(line[nusers], usr.ut_line,
sizeof(line[nusers]));
utmps[nusers].ut_user = name[nusers];
strncpy(name[nusers], usr.ut_name,
sizeof(name[nusers]));
utmps[nusers].ut_host = host[nusers];
strncpy(host[nusers], usr.ut_host,
sizeof(host[nusers]));
nusers++;
}
ut.utmp_array_len = nusers;
fclose(ufp);
return (&ut);
}
utmp_array *
rusersproc_names_3_svc(void *arg, struct svc_req *rqstp)
{
return (do_names_3(0));
}
utmp_array *
rusersproc_allnames_3_svc(void *arg, struct svc_req *rqstp)
{
return (do_names_3(1));
}
static struct utmpidlearr *
do_names_2(int all)
{
static struct utmpidlearr ut;
struct utmp usr;
int nusers = 0;
FILE *ufp;
memset((char *)&ut, 0, sizeof(ut));
ut.uia_arr = utmp_idlep;
ut.uia_cnt = 0;
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 &&
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_idlep[nusers] = &utmp_idle[nusers];
utmp_idle[nusers].ui_utmp.ut_time =
usr.ut_time;
utmp_idle[nusers].ui_idle =
getidle(usr.ut_line, usr.ut_host);
strncpy(utmp_idle[nusers].ui_utmp.ut_line, usr.ut_line,
sizeof(utmp_idle[nusers].ui_utmp.ut_line));
strncpy(utmp_idle[nusers].ui_utmp.ut_name, usr.ut_name,
sizeof(utmp_idle[nusers].ui_utmp.ut_name));
strncpy(utmp_idle[nusers].ui_utmp.ut_host, usr.ut_host,
sizeof(utmp_idle[nusers].ui_utmp.ut_host));
nusers++;
}
ut.uia_cnt = nusers;
fclose(ufp);
return (&ut);
}
struct utmpidlearr *
rusersproc_names_2_svc(void *arg, struct svc_req *rqstp)
{
return (do_names_2(0));
}
struct utmpidlearr *
rusersproc_allnames_2_svc(void *arg, struct svc_req *rqstp)
{
return (do_names_2(1));
}
void
rusers_service(struct svc_req *rqstp, SVCXPRT *transp)
{
union {
int fill;
} argument;
char *result;
xdrproc_t xdr_argument, xdr_result;
char *(*local) __P((void *, struct svc_req *));
switch (rqstp->rq_proc) {
case NULLPROC:
(void)svc_sendreply(transp, xdr_void, (char *)NULL);
goto leave;
case RUSERSPROC_NUM:
xdr_argument = (xdrproc_t)xdr_void;
xdr_result = (xdrproc_t)xdr_int;
switch (rqstp->rq_vers) {
case RUSERSVERS_3:
case RUSERSVERS_IDLE:
local = (char *(*) __P((void *, struct svc_req *)))
rusers_num_svc;
break;
default:
svcerr_progvers(transp, RUSERSVERS_IDLE, RUSERSVERS_3);
goto leave;
/*NOTREACHED*/
}
break;
case RUSERSPROC_NAMES:
xdr_argument = (xdrproc_t)xdr_void;
xdr_result = (xdrproc_t)xdr_utmp_array;
switch (rqstp->rq_vers) {
case RUSERSVERS_3:
local = (char *(*) __P((void *, struct svc_req *)))
rusersproc_names_3_svc;
break;
case RUSERSVERS_IDLE:
xdr_result = (xdrproc_t)xdr_utmpidlearr;
local = (char *(*) __P((void *, struct svc_req *)))
rusersproc_names_2_svc;
break;
default:
svcerr_progvers(transp, RUSERSVERS_IDLE, RUSERSVERS_3);
goto leave;
/*NOTREACHED*/
}
break;
case RUSERSPROC_ALLNAMES:
xdr_argument = (xdrproc_t)xdr_void;
xdr_result = (xdrproc_t)xdr_utmp_array;
switch (rqstp->rq_vers) {
case RUSERSVERS_3:
local = (char *(*) __P((void *, struct svc_req *)))
rusersproc_allnames_3_svc;
break;
case RUSERSVERS_IDLE:
xdr_result = (xdrproc_t)xdr_utmpidlearr;
local = (char *(*) __P((void *, struct svc_req *)))
rusersproc_allnames_2_svc;
break;
default:
svcerr_progvers(transp, RUSERSVERS_IDLE, RUSERSVERS_3);
goto leave;
/*NOTREACHED*/
}
break;
default:
svcerr_noproc(transp);
goto leave;
}
memset((char *)&argument, 0, sizeof(argument));
if (!svc_getargs(transp, xdr_argument, (caddr_t)&argument)) {
svcerr_decode(transp);
goto leave;
}
result = (*local)(&argument, rqstp);
if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
svcerr_systemerr(transp);
}
if (!svc_freeargs(transp, xdr_argument, (caddr_t)&argument)) {
syslog(LOG_ERR, "unable to free arguments");
exit(1);
}
leave:
if (from_inetd)
exit(0);
}
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