2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
36 * @(#)util.c 8.3 (Berkeley) 4/28/95
37 * $FreeBSD: src/usr.bin/finger/util.c,v 1.8.2.6 2002/07/03 01:14:24 des Exp $
38 * $DragonFly: src/usr.bin/finger/util.c,v 1.3 2003/10/04 20:36:44 hmp Exp $
41 #include <sys/param.h>
56 #include "pathnames.h"
58 static void find_idle_and_ttywrite(WHERE *);
59 static void userinfo(PERSON *, struct passwd *);
60 static WHERE *walloc(PERSON *);
63 match(struct passwd *pw, char *user)
68 if (!strcasecmp(pw->pw_name, user))
73 * Why do we skip asterisks!?!?
75 (void)strncpy(p = tbuf, pw->pw_gecos, sizeof(tbuf));
76 tbuf[sizeof(tbuf) - 1] = '\0';
80 /* Ampersands get replaced by the login name. */
81 if ((p = strtok(p, ",")) == NULL)
84 for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) {
86 (void)strncpy(t, pw->pw_name,
87 sizeof(name) - (t - name));
88 name[sizeof(name) - 1] = '\0';
89 while (t < &name[sizeof(name) - 1] && *++t)
96 for (t = name; (p = strtok(t, "\t ")) != NULL; t = NULL)
97 if (!strcasecmp(p, user))
103 enter_lastlog(PERSON *pn)
106 static int opened, fd;
110 /* some systems may not maintain lastlog, don't report errors. */
112 fd = open(_PATH_LASTLOG, O_RDONLY, 0);
116 lseek(fd, (long)pn->uid * sizeof(ll), SEEK_SET) !=
117 (long)pn->uid * sizeof(ll) ||
118 read(fd, (char *)&ll, sizeof(ll)) != sizeof(ll)) {
119 /* as if never logged in */
120 ll.ll_line[0] = ll.ll_host[0] = '\0';
123 if ((w = pn->whead) == NULL)
125 else if (ll.ll_time != 0) {
126 /* if last login is earlier than some current login */
127 for (; !doit && w != NULL; w = w->next)
128 if (w->info == LOGGEDIN && w->loginat < ll.ll_time)
131 * and if it's not any of the current logins
132 * can't use time comparison because there may be a small
133 * discrepancy since login calls time() twice
135 for (w = pn->whead; doit && w != NULL; w = w->next)
136 if (w->info == LOGGEDIN &&
137 strncmp(w->tty, ll.ll_line, UT_LINESIZE) == 0)
143 bcopy(ll.ll_line, w->tty, UT_LINESIZE);
144 w->tty[UT_LINESIZE] = 0;
145 bcopy(ll.ll_host, w->host, UT_HOSTSIZE);
146 w->host[UT_HOSTSIZE] = 0;
147 w->loginat = ll.ll_time;
152 enter_where(struct utmp *ut, PERSON *pn)
158 bcopy(ut->ut_line, w->tty, UT_LINESIZE);
159 w->tty[UT_LINESIZE] = 0;
160 bcopy(ut->ut_host, w->host, UT_HOSTSIZE);
161 w->host[UT_HOSTSIZE] = 0;
162 w->loginat = (time_t)ut->ut_time;
163 find_idle_and_ttywrite(w);
167 enter_person(struct passwd *pw)
173 (db = dbopen(NULL, O_RDWR, 0, DB_BTREE, NULL)) == NULL)
176 key.data = pw->pw_name;
177 key.size = strlen(pw->pw_name);
179 switch ((*db->get)(db, &key, &data, 0)) {
181 memmove(&pn, data.data, sizeof pn);
193 data.size = sizeof(PERSON *);
195 if ((*db->put)(db, &key, &data, 0))
202 find_person(char *name)
209 char buf[UT_NAMESIZE + 1];
214 if ((pw = getpwnam(name)) && hide(pw))
217 /* Name may be only UT_NAMESIZE long and not NUL terminated. */
218 for (cnt = 0; cnt < UT_NAMESIZE && *name; ++name, ++cnt)
224 if ((*db->get)(db, &key, &data, 0))
226 memmove(&p, data.data, sizeof p);
235 if ((p = malloc(sizeof(PERSON))) == NULL)
245 if ((w = malloc(sizeof(WHERE))) == NULL)
247 if (pn->whead == NULL)
248 pn->whead = pn->wtail = w;
262 static char pbuf[20];
264 /* don't touch anything if the user has their own formatting */
265 for (p = num; *p; ++p)
271 case 11: /* +0-123-456-7890 */
276 case 10: /* 012-345-6789 */
282 case 7: /* 012-3456 */
287 case 5: /* x0-1234 */
307 find_idle_and_ttywrite(WHERE *w)
313 (void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_DEV, w->tty);
314 if (stat(tbuf, &sb) < 0) {
318 touched = sb.st_atime;
319 if (touched < w->loginat) {
320 /* tty untouched since before login */
321 touched = w->loginat;
323 w->idletime = now < touched ? 0 : now - touched;
325 #define TALKABLE 0220 /* tty is writable if 220 mode */
326 w->writable = ((sb.st_mode & TALKABLE) == TALKABLE);
330 userinfo(PERSON *pn, struct passwd *pw)
333 char *bp, name[1024];
336 pn->realname = pn->office = pn->officephone = pn->homephone = NULL;
338 pn->uid = pw->pw_uid;
339 if ((pn->name = strdup(pw->pw_name)) == NULL)
340 err(1, "strdup failed");
341 if ((pn->dir = strdup(pw->pw_dir)) == NULL)
342 err(1, "strdup failed");
343 if ((pn->shell = strdup(pw->pw_shell)) == NULL)
344 err(1, "strdup failed");
346 /* why do we skip asterisks!?!? */
347 (void)strncpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf));
348 tbuf[sizeof(tbuf) - 1] = '\0';
352 /* ampersands get replaced by the login name */
353 if (!(p = strsep(&bp, ",")))
355 for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) {
357 (void)strncpy(t, pw->pw_name,
358 sizeof(name) - (t - name));
359 name[sizeof(name) - 1] = '\0';
362 while (t < &name[sizeof(name) - 1] && *++t)
369 if ((pn->realname = strdup(name)) == NULL)
370 err(1, "strdup failed");
371 pn->office = ((p = strsep(&bp, ",")) && *p) ?
373 pn->officephone = ((p = strsep(&bp, ",")) && *p) ?
375 pn->homephone = ((p = strsep(&bp, ",")) && *p) ?
377 (void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pw->pw_name);
378 pn->mailrecv = -1; /* -1 == not_valid */
379 if (stat(tbuf, &sb) < 0) {
380 if (errno != ENOENT) {
384 } else if (sb.st_size != 0) {
385 pn->mailrecv = sb.st_mtime;
386 pn->mailread = sb.st_atime;
391 * Is this user hiding from finger?
392 * If ~<user>/.nofinger exists, return 1 (hide), else return 0 (nohide).
396 hide(struct passwd *pw)
399 char buf[MAXPATHLEN];
404 snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir, _PATH_NOFINGER);
406 if (stat(buf, &st) == 0)