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. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved.
33 * @(#)finger.c 8.5 (Berkeley) 5/4/95
34 * $FreeBSD: src/usr.bin/finger/finger.c,v 1.15.2.9 2002/07/29 18:52:52 ume Exp $
35 * $DragonFly: src/usr.bin/finger/finger.c,v 1.6 2008/06/05 18:06:33 swildner Exp $
39 * Luke Mewburn <lm@rmit.edu.au> added the following on 940622:
40 * - mail status ("No Mail", "Mail read:...", or "New Mail ...,
42 * - 4 digit phone extensions (3210 is printed as x3210.)
43 * - host/office toggling in short format with -h & -o.
44 * - short day names (`Tue' printed instead of `Jun 21' if the
45 * login time is < 6 days.
49 * Finger prints out information about users. It is not portable since
50 * certain fields (e.g. the full user name, office, and phone numbers) are
51 * extracted from the gecos field of the passwd file which other UNIXes
52 * may not have or may use for other things.
54 * There are currently two output formats; the short format is one line
55 * per user and displays login name, tty, login time, real name, idle time,
56 * and either remote host information (default) or office location/phone
57 * number, depending on if -h or -o is used respectively.
58 * The long format gives the same information (in a more legible format) as
59 * well as home directory, shell, mail info, and .plan/.project files.
62 #include <sys/types.h>
63 #include <sys/socket.h>
72 #include "utmpentry.h"
76 #include "pathnames.h"
80 int entries, gflag, lflag, mflag, pplan, sflag, oflag, Tflag, eightflag;
81 sa_family_t family = PF_UNSPEC;
85 static void loginlist(void);
86 static int option(int, char **);
87 static void usage(void);
88 static void userlist(int, char **);
91 option(int argc, char **argv)
95 optind = 1; /* reset getopt */
97 while ((ch = getopt(argc, argv, "468glmpshoT")) != -1)
106 eightflag = 1; /* allow 8-bit passthrough */
112 lflag = 1; /* long format */
115 mflag = 1; /* force exact match of names */
118 pplan = 1; /* don't show .plan/.project */
121 sflag = 1; /* short format */
124 oflag = 0; /* remote host info */
127 oflag = 1; /* office info */
130 Tflag = 1; /* disable T/TCP */
143 fprintf(stderr, "usage: finger [-468lmpshoT] [login ...]\n");
148 main(int argc, char **argv)
153 static char myname[] = "finger";
155 if (getuid() == 0 || geteuid() == 0) {
156 if ((pw = getpwnam(UNPRIV_NAME)) && pw->pw_uid > 0) {
165 (void) setlocale(LC_ALL, "");
167 /* remove this line to get remote host */
168 oflag = 1; /* default to old "office" behavior */
171 * Process environment variables followed by command line arguments.
173 if ((envargv[1] = getenv("FINGER"))) {
177 option(envargc, envargv);
180 argcnt = option(argc, argv);
188 * Assign explicit "small" format if no names given and -l
189 * not selected. Force the -s BEFORE we get names so proper
190 * screening will be done.
193 sflag = 1; /* if -l not explicit, force -s */
196 printf("No one logged on.\n");
198 userlist(argc, argv);
200 * Assign explicit "large" format if names given and -s not
201 * explicitly stated. Force the -l AFTER we get names so any
202 * remote finger attempts specified won't be mishandled.
205 lflag = 1; /* if -s not explicit, force -l */
222 struct utmpentry *ep;
225 getutentries(NULL, &ep);
226 for (; ep; ep = ep->next) {
227 if ((pn = find_person(ep->name)) == NULL) {
228 if ((pw = getpwnam(ep->name)) == NULL)
232 pn = enter_person(pw);
237 for (sflag1 = R_FIRST;; sflag1 = R_NEXT) {
240 r = (*db->seq)(db, &key, &data, sflag1);
245 memmove(&tmp, data.data, sizeof tmp);
251 userlist(int argc, char **argv)
255 struct utmpentry *ep;
257 int r, sflag1, *used, *ip;
258 char **ap, **nargv, **np, **p;
260 char conf_alias[LINE_MAX];
264 if ((nargv = malloc((argc+1) * sizeof(char *))) == NULL ||
265 (used = calloc(argc, sizeof(int))) == NULL)
268 /* Pull out all network requests. */
269 for (ap = p = argv, np = nargv; *p; ++p)
282 * Mark any arguments beginning with '/' as invalid so that we
283 * don't accidently confuse them with expansions from finger.conf
285 for (p = argv, ip = used; *p; ++p, ++ip)
288 warnx("%s: no such user", *p);
292 * Traverse the finger alias configuration file of the form
293 * alias:(user|alias), ignoring comment lines beginning '#'.
295 if ((conf_fp = fopen(_PATH_FINGERCONF, "r")) != NULL) {
296 while(fgets(conf_alias, sizeof(conf_alias), conf_fp) != NULL) {
297 conf_length = strlen(conf_alias);
298 if (*conf_alias == '#' || conf_alias[--conf_length] != '\n')
300 conf_alias[conf_length] = '\0'; /* Remove trailing LF */
301 if ((conf_realname = strchr(conf_alias, ':')) == NULL)
303 *conf_realname = '\0'; /* Replace : with NUL */
304 for (p = argv; *p; ++p) {
305 if (strcmp(*p, conf_alias) == 0) {
306 if ((*p = strdup(conf_realname+1)) == NULL) {
316 * Traverse the list of possible login names and check the login name
317 * and real name against the name specified by the user. If the name
318 * begins with a '/', try to read the file of that name instead of
319 * gathering the traditional finger information.
322 for (p = argv, ip = used; *p; ++p, ++ip) {
323 if (**p != '/' || *ip == 1 || !show_text("", *p, "")) {
324 if (((pw = getpwnam(*p)) != NULL) && !hide(pw))
327 warnx("%s: no such user", *p);
331 while ((pw = getpwent()) != NULL) {
332 for (p = argv, ip = used; *p; ++p, ++ip)
333 if (**p == '/' && *ip != 1
334 && show_text("", *p, ""))
336 else if (match(pw, *p) && !hide(pw)) {
341 for (p = argv, ip = used; *p; ++p, ++ip)
343 warnx("%s: no such user", *p);
346 /* Handle network requests. */
347 net: for (p = nargv; *p;) {
357 * Scan thru the list of users currently logged in, saving
358 * appropriate data whenever a match occurs.
360 getutentries(NULL, &ep);
361 for (; ep; ep = ep->next) {
362 if ((pn = find_person(ep->name)) == NULL)
367 for (sflag1 = R_FIRST;; sflag1 = R_NEXT) {
370 r = (*db->seq)(db, &key, &data, sflag1);
375 memmove(&tmp, data.data, sizeof tmp);