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>
42 #include <sys/socket.h>
55 #include "utmpentry.h"
58 #include "pathnames.h"
60 static void find_idle_and_ttywrite(WHERE *);
61 static void userinfo(PERSON *, struct passwd *);
62 static WHERE *walloc(PERSON *);
65 match(struct passwd *pw, char *user)
70 if (!strcasecmp(pw->pw_name, user))
75 * Why do we skip asterisks!?!?
77 (void)strncpy(p = tbuf, pw->pw_gecos, sizeof(tbuf));
78 tbuf[sizeof(tbuf) - 1] = '\0';
82 /* Ampersands get replaced by the login name. */
83 if ((p = strtok(p, ",")) == NULL)
86 for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) {
88 (void)strncpy(t, pw->pw_name,
89 sizeof(name) - (t - name));
90 name[sizeof(name) - 1] = '\0';
91 while (t < &name[sizeof(name) - 1] && *++t)
98 for (t = name; (p = strtok(t, "\t ")) != NULL; t = NULL)
99 if (!strcasecmp(p, user))
105 enter_lastlog(PERSON *pn)
108 static int opened, fd;
112 /* some systems may not maintain lastlog, don't report errors. */
114 fd = open(_PATH_LASTLOG, O_RDONLY, 0);
118 lseek(fd, (long)pn->uid * sizeof(ll), SEEK_SET) !=
119 (off_t)((long)pn->uid * sizeof(ll)) ||
120 read(fd, (char *)&ll, sizeof(ll)) != sizeof(ll)) {
121 /* as if never logged in */
122 ll.ll_line[0] = ll.ll_host[0] = '\0';
125 if ((w = pn->whead) == NULL)
127 else if (ll.ll_time != 0) {
128 /* if last login is earlier than some current login */
129 for (; !doit && w != NULL; w = w->next)
130 if (w->info == LOGGEDIN && w->loginat < ll.ll_time)
133 * and if it's not any of the current logins
134 * can't use time comparison because there may be a small
135 * discrepancy since login calls time() twice
137 for (w = pn->whead; doit && w != NULL; w = w->next)
138 if (w->info == LOGGEDIN &&
139 strncmp(w->tty, ll.ll_line, UT_LINESIZE) == 0)
145 asprintf(&w->tty, "%s", ll.ll_line);
146 asprintf(&w->host, "%s", ll.ll_host);
147 w->loginat = ll.ll_time;
152 enter_where(struct utmpentry *ep, PERSON *pn)
160 w->loginat = (time_t)ep->tv.tv_sec;
161 find_idle_and_ttywrite(w);
165 enter_person(struct passwd *pw)
171 (db = dbopen(NULL, O_RDWR, 0, DB_BTREE, NULL)) == NULL)
174 key.data = pw->pw_name;
175 key.size = strlen(pw->pw_name);
177 switch ((*db->get)(db, &key, &data, 0)) {
179 memmove(&pn, data.data, sizeof pn);
191 data.size = sizeof(PERSON *);
193 if ((*db->put)(db, &key, &data, 0))
200 find_person(char *name)
207 char buf[UT_NAMESIZE + 1];
212 if ((pw = getpwnam(name)) && hide(pw))
215 /* Name may be only UT_NAMESIZE long and not NUL terminated. */
216 for (cnt = 0; cnt < UT_NAMESIZE && *name; ++name, ++cnt)
222 if ((*db->get)(db, &key, &data, 0))
224 memmove(&p, data.data, sizeof p);
233 if ((p = malloc(sizeof(PERSON))) == NULL)
243 if ((w = malloc(sizeof(WHERE))) == NULL)
245 bzero(w, sizeof(WHERE));
246 if (pn->whead == NULL) {
247 pn->whead = pn->wtail = w;
261 static char pbuf[20];
263 /* don't touch anything if the user has their own formatting */
264 for (p = num; *p; ++p)
270 case 11: /* +0-123-456-7890 */
275 case 10: /* 012-345-6789 */
281 case 7: /* 012-3456 */
286 case 5: /* x0-1234 */
306 find_idle_and_ttywrite(WHERE *w)
311 (void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_DEV, w->tty);
312 if (stat(tbuf, &sb) < 0) {
316 touched = sb.st_atime;
317 if (touched < w->loginat) {
318 /* tty untouched since before login */
319 touched = w->loginat;
321 w->idletime = now < touched ? 0 : now - touched;
323 #define TALKABLE 0220 /* tty is writable if 220 mode */
324 w->writable = ((sb.st_mode & TALKABLE) == TALKABLE);
328 userinfo(PERSON *pn, struct passwd *pw)
331 char *bp, name[1024];
334 pn->realname = pn->office = pn->officephone = pn->homephone = NULL;
336 pn->uid = pw->pw_uid;
337 if ((pn->name = strdup(pw->pw_name)) == NULL)
338 err(1, "strdup failed");
339 if ((pn->dir = strdup(pw->pw_dir)) == NULL)
340 err(1, "strdup failed");
341 if ((pn->shell = strdup(pw->pw_shell)) == NULL)
342 err(1, "strdup failed");
344 /* why do we skip asterisks!?!? */
345 (void)strncpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf));
346 tbuf[sizeof(tbuf) - 1] = '\0';
350 /* ampersands get replaced by the login name */
351 if (!(p = strsep(&bp, ",")))
353 for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) {
355 (void)strncpy(t, pw->pw_name,
356 sizeof(name) - (t - name));
357 name[sizeof(name) - 1] = '\0';
360 while (t < &name[sizeof(name) - 1] && *++t)
367 if ((pn->realname = strdup(name)) == NULL)
368 err(1, "strdup failed");
369 pn->office = ((p = strsep(&bp, ",")) && *p) ?
371 pn->officephone = ((p = strsep(&bp, ",")) && *p) ?
373 pn->homephone = ((p = strsep(&bp, ",")) && *p) ?
375 (void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pw->pw_name);
376 pn->mailrecv = -1; /* -1 == not_valid */
377 if (stat(tbuf, &sb) < 0) {
378 if (errno != ENOENT) {
382 } else if (sb.st_size != 0) {
383 pn->mailrecv = sb.st_mtime;
384 pn->mailread = sb.st_atime;
389 * Is this user hiding from finger?
390 * If ~<user>/.nofinger exists, return 1 (hide), else return 0 (nohide).
394 hide(struct passwd *pw)
397 char buf[MAXPATHLEN];
402 snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir, _PATH_NOFINGER);
404 if (stat(buf, &st) == 0)