1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1993, John Brezak
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #ifdef DEBUG
33 #include <errno.h>
34 #endif
35 #include <stdio.h>
36 #include <string.h>
37 #include <sys/param.h>
38 #include <sys/stat.h>
39 #include <stdlib.h>
40 #include <syslog.h>
41 #include <utmpx.h>
42 #ifdef XIDLE
43 #include <setjmp.h>
44 #include <X11/Xlib.h>
45 #include <X11/extensions/xidle.h>
46 #endif
47 #include <rpcsvc/rnusers.h>
48
49 #include "extern.h"
50
51 #ifndef _PATH_DEV
52 #define _PATH_DEV "/dev"
53 #endif
54
55 static utmpidle utmp_idle[MAXUSERS];
56 static utmp old_utmp[MAXUSERS];
57 static struct utmpx utmp_list[MAXUSERS];
58
59 #ifdef XIDLE
60 static Display *dpy;
61
62 static jmp_buf openAbort;
63
64 static void
abortOpen(void)65 abortOpen(void)
66 {
67 longjmp (openAbort, 1);
68 }
69
XqueryIdle(char * display)70 XqueryIdle(char *display)
71 {
72 int first_event, first_error;
73 Time IdleTime;
74
75 (void) signal (SIGALRM, abortOpen);
76 (void) alarm ((unsigned) 10);
77 if (!setjmp (openAbort)) {
78 if (!(dpy= XOpenDisplay(display))) {
79 syslog(LOG_ERR, "Cannot open display %s", display);
80 return(-1);
81 }
82 if (XidleQueryExtension(dpy, &first_event, &first_error)) {
83 if (!XGetIdleTime(dpy, &IdleTime)) {
84 syslog(LOG_ERR, "%s: unable to get idle time", display);
85 return(-1);
86 }
87 } else {
88 syslog(LOG_ERR, "%s: Xidle extension not loaded", display);
89 return(-1);
90 }
91 XCloseDisplay(dpy);
92 } else {
93 syslog(LOG_ERR, "%s: server grabbed for over 10 seconds", display);
94 return(-1);
95 }
96 (void) signal (SIGALRM, SIG_DFL);
97 (void) alarm ((unsigned) 0);
98
99 IdleTime /= 1000;
100 return((IdleTime + 30) / 60);
101 }
102 #endif
103
104 static u_int
getidle(const char * tty,const char * display __unused)105 getidle(const char *tty, const char *display __unused)
106 {
107 struct stat st;
108 char ttyname[PATH_MAX];
109 time_t now;
110 u_long idle;
111
112 /*
113 * If this is an X terminal or console, then try the
114 * XIdle extension
115 */
116 #ifdef XIDLE
117 if (display && *display && (idle = XqueryIdle(display)) >= 0)
118 return(idle);
119 #endif
120 idle = 0;
121 if (*tty == 'X') {
122 u_long kbd_idle, mouse_idle;
123 #if !defined(__FreeBSD__)
124 kbd_idle = getidle("kbd", NULL);
125 #else
126 kbd_idle = getidle("vga", NULL);
127 #endif
128 mouse_idle = getidle("mouse", NULL);
129 idle = (kbd_idle < mouse_idle)?kbd_idle:mouse_idle;
130 } else {
131 sprintf(ttyname, "%s/%s", _PATH_DEV, tty);
132 if (stat(ttyname, &st) < 0) {
133 #ifdef DEBUG
134 printf("%s: %s\n", ttyname, strerror(errno));
135 #endif
136 return(-1);
137 }
138 time(&now);
139 #ifdef DEBUG
140 printf("%s: now=%d atime=%d\n", ttyname, now,
141 st.st_atime);
142 #endif
143 idle = now - st.st_atime;
144 idle = (idle + 30) / 60; /* secs->mins */
145 }
146
147 return(idle);
148 }
149
150 static utmpidlearr *
do_names_2(void)151 do_names_2(void)
152 {
153 static utmpidlearr ut;
154 struct utmpx *usr;
155 int nusers = 0;
156
157 memset(&ut, 0, sizeof(ut));
158 ut.utmpidlearr_val = &utmp_idle[0];
159
160 setutxent();
161 while ((usr = getutxent()) != NULL && nusers < MAXUSERS) {
162 if (usr->ut_type != USER_PROCESS)
163 continue;
164
165 memcpy(&utmp_list[nusers], usr, sizeof(*usr));
166 utmp_idle[nusers].ui_utmp.ut_time = usr->ut_tv.tv_sec;
167 utmp_idle[nusers].ui_idle =
168 getidle(usr->ut_line, usr->ut_host);
169 utmp_idle[nusers].ui_utmp.ut_line =
170 utmp_list[nusers].ut_line;
171 utmp_idle[nusers].ui_utmp.ut_name =
172 utmp_list[nusers].ut_user;
173 utmp_idle[nusers].ui_utmp.ut_host =
174 utmp_list[nusers].ut_host;
175
176 nusers++;
177 }
178 endutxent();
179
180 ut.utmpidlearr_len = nusers;
181 return(&ut);
182 }
183
184 static int *
rusers_num(void * argp __unused,struct svc_req * rqstp __unused)185 rusers_num(void *argp __unused, struct svc_req *rqstp __unused)
186 {
187 static int num_users = 0;
188 struct utmpx *usr;
189
190 setutxent();
191 while ((usr = getutxent()) != NULL) {
192 if (usr->ut_type != USER_PROCESS)
193 continue;
194 num_users++;
195 }
196 endutxent();
197
198 return(&num_users);
199 }
200
201 static utmparr *
do_names_1(void)202 do_names_1(void)
203 {
204 utmpidlearr *utidle;
205 static utmparr ut;
206 unsigned int i;
207
208 bzero((char *)&ut, sizeof(ut));
209
210 utidle = do_names_2();
211 if (utidle) {
212 ut.utmparr_len = utidle->utmpidlearr_len;
213 ut.utmparr_val = &old_utmp[0];
214 for (i = 0; i < ut.utmparr_len; i++)
215 bcopy(&utmp_idle[i].ui_utmp, &old_utmp[i],
216 sizeof(old_utmp[0]));
217
218 }
219
220 return(&ut);
221 }
222
223 utmpidlearr *
rusersproc_names_2_svc(void * argp __unused,struct svc_req * rqstp __unused)224 rusersproc_names_2_svc(void *argp __unused, struct svc_req *rqstp __unused)
225 {
226
227 return (do_names_2());
228 }
229
230 utmpidlearr *
rusersproc_allnames_2_svc(void * argp __unused,struct svc_req * rqstp __unused)231 rusersproc_allnames_2_svc(void *argp __unused, struct svc_req *rqstp __unused)
232 {
233
234 return (do_names_2());
235 }
236
237 utmparr *
rusersproc_names_1_svc(void * argp __unused,struct svc_req * rqstp __unused)238 rusersproc_names_1_svc(void *argp __unused, struct svc_req *rqstp __unused)
239 {
240
241 return (do_names_1());
242 }
243
244 utmparr *
rusersproc_allnames_1_svc(void * argp __unused,struct svc_req * rqstp __unused)245 rusersproc_allnames_1_svc(void *argp __unused, struct svc_req *rqstp __unused)
246 {
247
248 return (do_names_1());
249 }
250
251 typedef void *(*rusersproc_t)(void *, struct svc_req *);
252
253 void
rusers_service(struct svc_req * rqstp,SVCXPRT * transp)254 rusers_service(struct svc_req *rqstp, SVCXPRT *transp)
255 {
256 union {
257 int fill;
258 } argument;
259 char *result;
260 xdrproc_t xdr_argument, xdr_result;
261 rusersproc_t local;
262
263 switch (rqstp->rq_proc) {
264 case NULLPROC:
265 (void)svc_sendreply(transp, (xdrproc_t)xdr_void, NULL);
266 goto leave;
267
268 case RUSERSPROC_NUM:
269 xdr_argument = (xdrproc_t)xdr_void;
270 xdr_result = (xdrproc_t)xdr_int;
271 local = (rusersproc_t)rusers_num;
272 break;
273
274 case RUSERSPROC_NAMES:
275 xdr_argument = (xdrproc_t)xdr_void;
276 xdr_result = (xdrproc_t)xdr_utmpidlearr;
277 switch (rqstp->rq_vers) {
278 case RUSERSVERS_ORIG:
279 local = (rusersproc_t)rusersproc_names_1_svc;
280 break;
281 case RUSERSVERS_IDLE:
282 local = (rusersproc_t)rusersproc_names_2_svc;
283 break;
284 default:
285 svcerr_progvers(transp, RUSERSVERS_ORIG, RUSERSVERS_IDLE);
286 goto leave;
287 /*NOTREACHED*/
288 }
289 break;
290
291 case RUSERSPROC_ALLNAMES:
292 xdr_argument = (xdrproc_t)xdr_void;
293 xdr_result = (xdrproc_t)xdr_utmpidlearr;
294 switch (rqstp->rq_vers) {
295 case RUSERSVERS_ORIG:
296 local = (rusersproc_t)rusersproc_allnames_1_svc;
297 break;
298 case RUSERSVERS_IDLE:
299 local = (rusersproc_t)rusersproc_allnames_2_svc;
300 break;
301 default:
302 svcerr_progvers(transp, RUSERSVERS_ORIG, RUSERSVERS_IDLE);
303 goto leave;
304 /*NOTREACHED*/
305 }
306 break;
307
308 default:
309 svcerr_noproc(transp);
310 goto leave;
311 }
312 bzero(&argument, sizeof(argument));
313 if (!svc_getargs(transp, (xdrproc_t)xdr_argument, &argument)) {
314 svcerr_decode(transp);
315 goto leave;
316 }
317 result = (*local)(&argument, rqstp);
318 if (result != NULL &&
319 !svc_sendreply(transp, (xdrproc_t)xdr_result, result)) {
320 svcerr_systemerr(transp);
321 }
322 if (!svc_freeargs(transp, (xdrproc_t)xdr_argument, &argument)) {
323 syslog(LOG_ERR, "unable to free arguments");
324 exit(1);
325 }
326 leave:
327 if (from_inetd)
328 exit(0);
329 }
330