1/*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#if 0
38#ifndef lint
39static char sccsid[] = "@(#)util.c 8.3 (Berkeley) 4/28/95";
40#endif
41#endif
42
43#include <sys/cdefs.h>
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44__FBSDID("$FreeBSD: head/usr.bin/finger/util.c 200462 2009-12-13 03:14:06Z delphij $");
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| 44__FBSDID("$FreeBSD: head/usr.bin/finger/util.c 201140 2009-12-28 20:54:34Z ed $"); |
45
46#include <sys/param.h>
47#include <sys/socket.h>
48#include <sys/stat.h>
49#include <ctype.h>
50#include <db.h>
51#include <err.h>
52#include <errno.h>
53#include <fcntl.h>
54#include <paths.h>
55#include <pwd.h>
56#include <stdio.h>
57#include <stdlib.h>
58#include <string.h>
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59#define _ULOG_POSIX_NAMES
60#include <ulog.h> |
61#include <unistd.h>
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60#include <utmp.h>
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62#include "finger.h"
63#include "pathnames.h"
64
65static void find_idle_and_ttywrite(WHERE *);
66static void userinfo(PERSON *, struct passwd *);
67static WHERE *walloc(PERSON *);
68
69int
70match(struct passwd *pw, const char *user)
71{
72 char *p, *t;
73 char name[1024];
74
75 if (!strcasecmp(pw->pw_name, user))
76 return(1);
77
78 /*
79 * XXX
80 * Why do we skip asterisks!?!?
81 */
82 (void)strncpy(p = tbuf, pw->pw_gecos, sizeof(tbuf));
83 tbuf[sizeof(tbuf) - 1] = '\0';
84 if (*p == '*')
85 ++p;
86
87 /* Ampersands get replaced by the login name. */
88 if ((p = strtok(p, ",")) == NULL)
89 return(0);
90
91 for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) {
92 if (*t == '&') {
93 (void)strncpy(t, pw->pw_name,
94 sizeof(name) - (t - name));
95 name[sizeof(name) - 1] = '\0';
96 while (t < &name[sizeof(name) - 1] && *++t)
97 continue;
98 } else {
99 ++t;
100 }
101 }
102 *t = '\0';
103 for (t = name; (p = strtok(t, "\t ")) != NULL; t = NULL)
104 if (!strcasecmp(p, user))
105 return(1);
106 return(0);
107}
108
109void
110enter_lastlog(PERSON *pn)
111{
112 WHERE *w;
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112 static int opened, fd;
113 struct lastlog ll;
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| 113 struct ulog_utmpx *ut; |
114 char doit = 0;
115
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116 /* some systems may not maintain lastlog, don't report errors. */
117 if (!opened) {
118 fd = open(_PATH_LASTLOG, O_RDONLY, 0);
119 opened = 1;
120 }
121 if (fd == -1 ||
122 lseek(fd, (long)pn->uid * sizeof(ll), SEEK_SET) !=
123 (long)pn->uid * sizeof(ll) ||
124 read(fd, (char *)&ll, sizeof(ll)) != sizeof(ll)) {
125 /* as if never logged in */
126 ll.ll_line[0] = ll.ll_host[0] = '\0';
127 ll.ll_time = 0;
128 }
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116 ulog_setutxfile(UTXI_USER, NULL);
117 ut = ulog_getutxuser(pn->name); |
118 if ((w = pn->whead) == NULL)
119 doit = 1;
|
131 else if (ll.ll_time != 0) {
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| 120 else if (ut != NULL && ut->ut_type == USER_PROCESS) { |
121 /* if last login is earlier than some current login */
122 for (; !doit && w != NULL; w = w->next)
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134 if (w->info == LOGGEDIN && w->loginat < ll.ll_time)
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123 if (w->info == LOGGEDIN &&
124 w->loginat < ut->ut_tv.tv_sec) |
125 doit = 1;
126 /*
127 * and if it's not any of the current logins
128 * can't use time comparison because there may be a small
129 * discrepancy since login calls time() twice
130 */
131 for (w = pn->whead; doit && w != NULL; w = w->next)
132 if (w->info == LOGGEDIN &&
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143 strncmp(w->tty, ll.ll_line, UT_LINESIZE) == 0)
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| 133 strcmp(w->tty, ut->ut_line) == 0) |
134 doit = 0;
135 }
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146 if (doit) {
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| 136 if (ut != NULL && doit) { |
137 w = walloc(pn);
138 w->info = LASTLOG;
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149 bcopy(ll.ll_line, w->tty, UT_LINESIZE);
150 w->tty[UT_LINESIZE] = 0;
151 bcopy(ll.ll_host, w->host, UT_HOSTSIZE);
152 w->host[UT_HOSTSIZE] = 0;
153 w->loginat = ll.ll_time;
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139 strcpy(w->tty, ut->ut_line);
140 strcpy(w->host, ut->ut_host);
141 w->loginat = ut->ut_tv.tv_sec; |
142 }
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| 143 ulog_endutxent(); |
144}
145
146void
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158enter_where(struct utmp *ut, PERSON *pn)
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| 147enter_where(struct utmpx *ut, PERSON *pn) |
148{
149 WHERE *w;
150
151 w = walloc(pn);
152 w->info = LOGGEDIN;
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164 bcopy(ut->ut_line, w->tty, UT_LINESIZE);
165 w->tty[UT_LINESIZE] = 0;
166 bcopy(ut->ut_host, w->host, UT_HOSTSIZE);
167 w->host[UT_HOSTSIZE] = 0;
168 w->loginat = (time_t)ut->ut_time;
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153 strcpy(w->tty, ut->ut_line);
154 strcpy(w->host, ut->ut_host);
155 w->loginat = ut->ut_tv.tv_sec; |
156 find_idle_and_ttywrite(w);
157}
158
159PERSON *
160enter_person(struct passwd *pw)
161{
162 DBT data, key;
163 PERSON *pn;
164
165 if (db == NULL &&
166 (db = dbopen(NULL, O_RDWR, 0, DB_BTREE, NULL)) == NULL)
167 err(1, NULL);
168
169 key.data = pw->pw_name;
170 key.size = strlen(pw->pw_name);
171
172 switch ((*db->get)(db, &key, &data, 0)) {
173 case 0:
174 memmove(&pn, data.data, sizeof pn);
175 return (pn);
176 default:
177 case -1:
178 err(1, "db get");
179 /* NOTREACHED */
180 case 1:
181 ++entries;
182 pn = palloc();
183 userinfo(pn, pw);
184 pn->whead = NULL;
185
186 data.size = sizeof(PERSON *);
187 data.data = &pn;
188 if ((*db->put)(db, &key, &data, 0))
189 err(1, "db put");
190 return (pn);
191 }
192}
193
194PERSON *
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208find_person(const char *name)
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| 195find_person(char *name) |
196{
197 struct passwd *pw;
198
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212 int cnt;
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199 DBT data, key;
200 PERSON *p;
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215 char buf[UT_NAMESIZE + 1];
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201
202 if (!db)
203 return(NULL);
204
205 if ((pw = getpwnam(name)) && hide(pw))
206 return(NULL);
207
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223 /* Name may be only UT_NAMESIZE long and not NUL terminated. */
224 for (cnt = 0; cnt < UT_NAMESIZE && *name; ++name, ++cnt)
225 buf[cnt] = *name;
226 buf[cnt] = '\0';
227 key.data = buf;
228 key.size = cnt;
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208 key.data = name;
209 key.size = strlen(name); |
210
211 if ((*db->get)(db, &key, &data, 0))
212 return (NULL);
213 memmove(&p, data.data, sizeof p);
214 return (p);
215}
216
217PERSON *
218palloc(void)
219{
220 PERSON *p;
221
222 if ((p = malloc(sizeof(PERSON))) == NULL)
223 err(1, NULL);
224 return(p);
225}
226
227static WHERE *
228walloc(PERSON *pn)
229{
230 WHERE *w;
231
232 if ((w = malloc(sizeof(WHERE))) == NULL)
233 err(1, NULL);
234 if (pn->whead == NULL)
235 pn->whead = pn->wtail = w;
236 else {
237 pn->wtail->next = w;
238 pn->wtail = w;
239 }
240 w->next = NULL;
241 return(w);
242}
243
244char *
245prphone(char *num)
246{
247 char *p;
248 int len;
249 static char pbuf[20];
250
251 /* don't touch anything if the user has their own formatting */
252 for (p = num; *p; ++p)
253 if (!isdigit(*p))
254 return(num);
255 len = p - num;
256 p = pbuf;
257 switch(len) {
258 case 11: /* +0-123-456-7890 */
259 *p++ = '+';
260 *p++ = *num++;
261 *p++ = '-';
262 /* FALLTHROUGH */
263 case 10: /* 012-345-6789 */
264 *p++ = *num++;
265 *p++ = *num++;
266 *p++ = *num++;
267 *p++ = '-';
268 /* FALLTHROUGH */
269 case 7: /* 012-3456 */
270 *p++ = *num++;
271 *p++ = *num++;
272 *p++ = *num++;
273 break;
274 case 5: /* x0-1234 */
275 case 4: /* x1234 */
276 *p++ = 'x';
277 *p++ = *num++;
278 break;
279 default:
280 return(num);
281 }
282 if (len != 4) {
283 *p++ = '-';
284 *p++ = *num++;
285 }
286 *p++ = *num++;
287 *p++ = *num++;
288 *p++ = *num++;
289 *p = '\0';
290 return(pbuf);
291}
292
293static void
294find_idle_and_ttywrite(WHERE *w)
295{
296 struct stat sb;
297 time_t touched;
298 int error;
299
300 (void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_DEV, w->tty);
301
302 error = stat(tbuf, &sb);
303 if (error < 0 && errno == ENOENT) {
304 /*
305 * The terminal listed is not actually a terminal (i.e.,
306 * ":0"). This is a failure, so we'll skip printing
307 * out the idle time, which is non-ideal but better
308 * than a bogus warning and idle time.
309 */
310 w->idletime = -1;
311 return;
312 } else if (error < 0) {
313 warn("%s", tbuf);
314 w->idletime = -1;
315 return;
316 }
317 touched = sb.st_atime;
318 if (touched < w->loginat) {
319 /* tty untouched since before login */
320 touched = w->loginat;
321 }
322 w->idletime = now < touched ? 0 : now - touched;
323
324#define TALKABLE 0220 /* tty is writable if 220 mode */
325 w->writable = ((sb.st_mode & TALKABLE) == TALKABLE);
326}
327
328static void
329userinfo(PERSON *pn, struct passwd *pw)
330{
331 char *p, *t;
332 char *bp, name[1024];
333 struct stat sb;
334
335 pn->realname = pn->office = pn->officephone = pn->homephone = NULL;
336
337 pn->uid = pw->pw_uid;
338 if ((pn->name = strdup(pw->pw_name)) == NULL)
339 err(1, "strdup failed");
340 if ((pn->dir = strdup(pw->pw_dir)) == NULL)
341 err(1, "strdup failed");
342 if ((pn->shell = strdup(pw->pw_shell)) == NULL)
343 err(1, "strdup failed");
344
345 /* why do we skip asterisks!?!? */
346 (void)strncpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf));
347 tbuf[sizeof(tbuf) - 1] = '\0';
348 if (*bp == '*')
349 ++bp;
350
351 /* ampersands get replaced by the login name */
352 if (!(p = strsep(&bp, ",")))
353 return;
354 for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) {
355 if (*t == '&') {
356 (void)strncpy(t, pw->pw_name,
357 sizeof(name) - (t - name));
358 name[sizeof(name) - 1] = '\0';
359 if (islower(*t))
360 *t = toupper(*t);
361 while (t < &name[sizeof(name) - 1] && *++t)
362 continue;
363 } else {
364 ++t;
365 }
366 }
367 *t = '\0';
368 if ((pn->realname = strdup(name)) == NULL)
369 err(1, "strdup failed");
370 pn->office = ((p = strsep(&bp, ",")) && *p) ?
371 strdup(p) : NULL;
372 pn->officephone = ((p = strsep(&bp, ",")) && *p) ?
373 strdup(p) : NULL;
374 pn->homephone = ((p = strsep(&bp, ",")) && *p) ?
375 strdup(p) : NULL;
376 (void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pw->pw_name);
377 pn->mailrecv = -1; /* -1 == not_valid */
378 if (stat(tbuf, &sb) < 0) {
379 if (errno != ENOENT) {
380 warn("%s", tbuf);
381 return;
382 }
383 } else if (sb.st_size != 0) {
384 pn->mailrecv = sb.st_mtime;
385 pn->mailread = sb.st_atime;
386 }
387}
388
389/*
390 * Is this user hiding from finger?
391 * If ~<user>/.nofinger exists, return 1 (hide), else return 0 (nohide).
392 * Nobody can hide from root.
393 */
394
395int
396hide(struct passwd *pw)
397{
398 struct stat st;
399 char buf[MAXPATHLEN];
400
401 if (invoker_root || !pw->pw_dir)
402 return 0;
403
404 snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir, _PATH_NOFINGER);
405
406 if (stat(buf, &st) == 0)
407 return 1;
408
409 return 0;
410}
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