xref: /freebsd/usr.bin/finger/finger.c (revision a5af661e2308df0c655c23b1f09437cade7d596c)
19b50d902SRodney W. Grimes /*
29b50d902SRodney W. Grimes  * Copyright (c) 1989, 1993
39b50d902SRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
49b50d902SRodney W. Grimes  *
59b50d902SRodney W. Grimes  * This code is derived from software contributed to Berkeley by
69b50d902SRodney W. Grimes  * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
79b50d902SRodney W. Grimes  *
89b50d902SRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
99b50d902SRodney W. Grimes  * modification, are permitted provided that the following conditions
109b50d902SRodney W. Grimes  * are met:
119b50d902SRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
129b50d902SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
139b50d902SRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
149b50d902SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
159b50d902SRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
169b50d902SRodney W. Grimes  * 3. All advertising materials mentioning features or use of this software
179b50d902SRodney W. Grimes  *    must display the following acknowledgement:
189b50d902SRodney W. Grimes  *	This product includes software developed by the University of
199b50d902SRodney W. Grimes  *	California, Berkeley and its contributors.
209b50d902SRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
219b50d902SRodney W. Grimes  *    may be used to endorse or promote products derived from this software
229b50d902SRodney W. Grimes  *    without specific prior written permission.
239b50d902SRodney W. Grimes  *
249b50d902SRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
259b50d902SRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
269b50d902SRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
279b50d902SRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
289b50d902SRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
299b50d902SRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
309b50d902SRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
319b50d902SRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
329b50d902SRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
339b50d902SRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
349b50d902SRodney W. Grimes  * SUCH DAMAGE.
359b50d902SRodney W. Grimes  */
369b50d902SRodney W. Grimes 
3786641d8fSPaul Traina /*
3886641d8fSPaul Traina  * Luke Mewburn <lm@rmit.edu.au> added the following on 940622:
3986641d8fSPaul Traina  *    - mail status ("No Mail", "Mail read:...", or "New Mail ...,
4086641d8fSPaul Traina  *	Unread since ...".)
4186641d8fSPaul Traina  *    - 4 digit phone extensions (3210 is printed as x3210.)
4286641d8fSPaul Traina  *    - host/office toggling in short format with -h & -o.
4386641d8fSPaul Traina  *    - short day names (`Tue' printed instead of `Jun 21' if the
4486641d8fSPaul Traina  *	login time is < 6 days.
4586641d8fSPaul Traina  */
4686641d8fSPaul Traina 
479b50d902SRodney W. Grimes #ifndef lint
489b50d902SRodney W. Grimes static char copyright[] =
499b50d902SRodney W. Grimes "@(#) Copyright (c) 1989, 1993\n\
509b50d902SRodney W. Grimes 	The Regents of the University of California.  All rights reserved.\n";
519b50d902SRodney W. Grimes #endif /* not lint */
529b50d902SRodney W. Grimes 
539b50d902SRodney W. Grimes #ifndef lint
549b50d902SRodney W. Grimes static char sccsid[] = "@(#)finger.c	8.2 (Berkeley) 9/30/93";
559b50d902SRodney W. Grimes #endif /* not lint */
569b50d902SRodney W. Grimes 
579b50d902SRodney W. Grimes /*
589b50d902SRodney W. Grimes  * Finger prints out information about users.  It is not portable since
599b50d902SRodney W. Grimes  * certain fields (e.g. the full user name, office, and phone numbers) are
609b50d902SRodney W. Grimes  * extracted from the gecos field of the passwd file which other UNIXes
619b50d902SRodney W. Grimes  * may not have or may use for other things.
629b50d902SRodney W. Grimes  *
639b50d902SRodney W. Grimes  * There are currently two output formats; the short format is one line
649b50d902SRodney W. Grimes  * per user and displays login name, tty, login time, real name, idle time,
6586641d8fSPaul Traina  * and either remote host information (default) or office location/phone
6686641d8fSPaul Traina  * number, depending on if -h or -o is used respectively.
6786641d8fSPaul Traina  * The long format gives the same information (in a more legible format) as
6886641d8fSPaul Traina  * well as home directory, shell, mail info, and .plan/.project files.
699b50d902SRodney W. Grimes  */
709b50d902SRodney W. Grimes 
719b50d902SRodney W. Grimes #include <sys/param.h>
729b50d902SRodney W. Grimes #include <fcntl.h>
739b50d902SRodney W. Grimes #include <time.h>
749b50d902SRodney W. Grimes #include <pwd.h>
759b50d902SRodney W. Grimes #include <utmp.h>
769b50d902SRodney W. Grimes #include <errno.h>
779b50d902SRodney W. Grimes #include <stdio.h>
789b50d902SRodney W. Grimes #include <stdlib.h>
799b50d902SRodney W. Grimes #include <string.h>
809b50d902SRodney W. Grimes #include <db.h>
819b50d902SRodney W. Grimes #include "finger.h"
829b50d902SRodney W. Grimes 
839b50d902SRodney W. Grimes DB *db;
849b50d902SRodney W. Grimes time_t now;
8586641d8fSPaul Traina int entries, lflag, mflag, pplan, sflag, oflag;
869b50d902SRodney W. Grimes char tbuf[1024];
879b50d902SRodney W. Grimes 
889b50d902SRodney W. Grimes static void loginlist __P((void));
899b50d902SRodney W. Grimes static void userlist __P((int, char **));
909b50d902SRodney W. Grimes 
9159be6088SPaul Traina int
9259be6088SPaul Traina option(argc, argv)
939b50d902SRodney W. Grimes 	int argc;
949b50d902SRodney W. Grimes 	char **argv;
959b50d902SRodney W. Grimes {
969b50d902SRodney W. Grimes 	int ch;
979b50d902SRodney W. Grimes 
9859be6088SPaul Traina 	optind = 1;		/* reset getopt */
9986641d8fSPaul Traina 
10086641d8fSPaul Traina 	while ((ch = getopt(argc, argv, "lmpsho")) != EOF)
1019b50d902SRodney W. Grimes 		switch(ch) {
1029b50d902SRodney W. Grimes 		case 'l':
1039b50d902SRodney W. Grimes 			lflag = 1;		/* long format */
1049b50d902SRodney W. Grimes 			break;
1059b50d902SRodney W. Grimes 		case 'm':
1069b50d902SRodney W. Grimes 			mflag = 1;		/* force exact match of names */
1079b50d902SRodney W. Grimes 			break;
1089b50d902SRodney W. Grimes 		case 'p':
1099b50d902SRodney W. Grimes 			pplan = 1;		/* don't show .plan/.project */
1109b50d902SRodney W. Grimes 			break;
1119b50d902SRodney W. Grimes 		case 's':
1129b50d902SRodney W. Grimes 			sflag = 1;		/* short format */
1139b50d902SRodney W. Grimes 			break;
11486641d8fSPaul Traina 		case 'h':
11586641d8fSPaul Traina 			oflag = 0;		/* remote host info */
11686641d8fSPaul Traina 			break;
11786641d8fSPaul Traina 		case 'o':
11886641d8fSPaul Traina 			oflag = 1;		/* office info */
11986641d8fSPaul Traina 			break;
1209b50d902SRodney W. Grimes 		case '?':
1219b50d902SRodney W. Grimes 		default:
1229b50d902SRodney W. Grimes 			(void)fprintf(stderr,
12386641d8fSPaul Traina 			    "usage: finger [-lmpsho] [login ...]\n");
1249b50d902SRodney W. Grimes 			exit(1);
1259b50d902SRodney W. Grimes 		}
12659be6088SPaul Traina 
12759be6088SPaul Traina 	return optind;
12859be6088SPaul Traina }
12959be6088SPaul Traina 
13059be6088SPaul Traina main(argc, argv)
13159be6088SPaul Traina 	int argc;
13259be6088SPaul Traina 	char **argv;
13359be6088SPaul Traina {
13459be6088SPaul Traina 	int ch, envargc, argcnt;
13559be6088SPaul Traina 	char *envargv[3];
13659be6088SPaul Traina 
13759be6088SPaul Traina 				/* remove this line to get remote host */
13859be6088SPaul Traina 	oflag = 1;		/* default to old "office" behavior */
13959be6088SPaul Traina 
14059be6088SPaul Traina 	/*
14159be6088SPaul Traina 	 * Process environment variables followed by command line arguments.
14259be6088SPaul Traina 	 */
14359be6088SPaul Traina 	if ((envargv[1] = getenv("FINGER"))) {
14459be6088SPaul Traina 		envargc = 2;
14559be6088SPaul Traina 		envargv[0] = "finger";
14659be6088SPaul Traina 		envargv[2] = NULL;
14759be6088SPaul Traina 		(void) option(envargc, envargv);
14859be6088SPaul Traina 	}
14959be6088SPaul Traina 
15059be6088SPaul Traina 	argcnt = option(argc, argv);
15159be6088SPaul Traina 	argc -= argcnt;
15259be6088SPaul Traina 	argv += argcnt;
1539b50d902SRodney W. Grimes 
1549b50d902SRodney W. Grimes 	(void)time(&now);
1559b50d902SRodney W. Grimes 	setpassent(1);
1569b50d902SRodney W. Grimes 	if (!*argv) {
1579b50d902SRodney W. Grimes 		/*
1589b50d902SRodney W. Grimes 		 * Assign explicit "small" format if no names given and -l
1599b50d902SRodney W. Grimes 		 * not selected.  Force the -s BEFORE we get names so proper
1609b50d902SRodney W. Grimes 		 * screening will be done.
1619b50d902SRodney W. Grimes 		 */
1629b50d902SRodney W. Grimes 		if (!lflag)
1639b50d902SRodney W. Grimes 			sflag = 1;	/* if -l not explicit, force -s */
1649b50d902SRodney W. Grimes 		loginlist();
1659b50d902SRodney W. Grimes 		if (entries == 0)
1669b50d902SRodney W. Grimes 			(void)printf("No one logged on.\n");
1679b50d902SRodney W. Grimes 	} else {
1689b50d902SRodney W. Grimes 		userlist(argc, argv);
1699b50d902SRodney W. Grimes 		/*
1709b50d902SRodney W. Grimes 		 * Assign explicit "large" format if names given and -s not
1719b50d902SRodney W. Grimes 		 * explicitly stated.  Force the -l AFTER we get names so any
1729b50d902SRodney W. Grimes 		 * remote finger attempts specified won't be mishandled.
1739b50d902SRodney W. Grimes 		 */
1749b50d902SRodney W. Grimes 		if (!sflag)
1759b50d902SRodney W. Grimes 			lflag = 1;	/* if -s not explicit, force -l */
1769b50d902SRodney W. Grimes 	}
1779b50d902SRodney W. Grimes 	if (entries)
1789b50d902SRodney W. Grimes 		if (lflag)
1799b50d902SRodney W. Grimes 			lflag_print();
1809b50d902SRodney W. Grimes 		else
1819b50d902SRodney W. Grimes 			sflag_print();
1829b50d902SRodney W. Grimes 	exit(0);
1839b50d902SRodney W. Grimes }
1849b50d902SRodney W. Grimes 
1859b50d902SRodney W. Grimes static void
1869b50d902SRodney W. Grimes loginlist()
1879b50d902SRodney W. Grimes {
1889b50d902SRodney W. Grimes 	register PERSON *pn;
1899b50d902SRodney W. Grimes 	DBT data, key;
1909b50d902SRodney W. Grimes 	struct passwd *pw;
1919b50d902SRodney W. Grimes 	struct utmp user;
1929b50d902SRodney W. Grimes 	int r, sflag;
1939b50d902SRodney W. Grimes 	char name[UT_NAMESIZE + 1];
1949b50d902SRodney W. Grimes 
1959b50d902SRodney W. Grimes 	if (!freopen(_PATH_UTMP, "r", stdin))
1969b50d902SRodney W. Grimes 		err("%s: %s", _PATH_UTMP, strerror(errno));
1979b50d902SRodney W. Grimes 	name[UT_NAMESIZE] = NULL;
1989b50d902SRodney W. Grimes 	while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
1999b50d902SRodney W. Grimes 		if (!user.ut_name[0])
2009b50d902SRodney W. Grimes 			continue;
2019b50d902SRodney W. Grimes 		if ((pn = find_person(user.ut_name)) == NULL) {
2029b50d902SRodney W. Grimes 			bcopy(user.ut_name, name, UT_NAMESIZE);
2039b50d902SRodney W. Grimes 			if ((pw = getpwnam(name)) == NULL)
2049b50d902SRodney W. Grimes 				continue;
2059b50d902SRodney W. Grimes 			pn = enter_person(pw);
2069b50d902SRodney W. Grimes 		}
2079b50d902SRodney W. Grimes 		enter_where(&user, pn);
2089b50d902SRodney W. Grimes 	}
2099b50d902SRodney W. Grimes 	if (db && lflag)
2109b50d902SRodney W. Grimes 		for (sflag = R_FIRST;; sflag = R_NEXT) {
2119b50d902SRodney W. Grimes 			r = (*db->seq)(db, &key, &data, sflag);
2129b50d902SRodney W. Grimes 			if (r == -1)
2139b50d902SRodney W. Grimes 				err("db seq: %s", strerror(errno));
2149b50d902SRodney W. Grimes 			if (r == 1)
2159b50d902SRodney W. Grimes 				break;
2169b50d902SRodney W. Grimes 			enter_lastlog(*(PERSON **)data.data);
2179b50d902SRodney W. Grimes 		}
2189b50d902SRodney W. Grimes }
2199b50d902SRodney W. Grimes 
2209b50d902SRodney W. Grimes static void
2219b50d902SRodney W. Grimes userlist(argc, argv)
2229b50d902SRodney W. Grimes 	register int argc;
2239b50d902SRodney W. Grimes 	register char **argv;
2249b50d902SRodney W. Grimes {
2259b50d902SRodney W. Grimes 	register PERSON *pn;
2269b50d902SRodney W. Grimes 	DBT data, key;
2279b50d902SRodney W. Grimes 	struct utmp user;
2289b50d902SRodney W. Grimes 	struct passwd *pw;
2299b50d902SRodney W. Grimes 	int r, sflag, *used, *ip;
2309b50d902SRodney W. Grimes 	char **ap, **nargv, **np, **p;
2319b50d902SRodney W. Grimes 
2329b50d902SRodney W. Grimes 	if ((nargv = malloc((argc+1) * sizeof(char *))) == NULL ||
2339b50d902SRodney W. Grimes 	    (used = calloc(argc, sizeof(int))) == NULL)
2349b50d902SRodney W. Grimes 		err("%s", strerror(errno));
2359b50d902SRodney W. Grimes 
2369b50d902SRodney W. Grimes 	/* Pull out all network requests. */
2379b50d902SRodney W. Grimes 	for (ap = p = argv, np = nargv; *p; ++p)
2389b50d902SRodney W. Grimes 		if (index(*p, '@'))
2399b50d902SRodney W. Grimes 			*np++ = *p;
2409b50d902SRodney W. Grimes 		else
2419b50d902SRodney W. Grimes 			*ap++ = *p;
2429b50d902SRodney W. Grimes 
2439b50d902SRodney W. Grimes 	*np++ = NULL;
2449b50d902SRodney W. Grimes 	*ap++ = NULL;
2459b50d902SRodney W. Grimes 
2469b50d902SRodney W. Grimes 	if (!*argv)
2479b50d902SRodney W. Grimes 		goto net;
2489b50d902SRodney W. Grimes 
2499b50d902SRodney W. Grimes 	/*
2509b50d902SRodney W. Grimes 	 * Traverse the list of possible login names and check the login name
2519b50d902SRodney W. Grimes 	 * and real name against the name specified by the user.
2529b50d902SRodney W. Grimes 	 */
2539b50d902SRodney W. Grimes 	if (mflag)
2549b50d902SRodney W. Grimes 		for (p = argv; *p; ++p)
2559b50d902SRodney W. Grimes 			if (pw = getpwnam(*p))
2569b50d902SRodney W. Grimes 				enter_person(pw);
2579b50d902SRodney W. Grimes 			else
2589b50d902SRodney W. Grimes 				(void)fprintf(stderr,
2599b50d902SRodney W. Grimes 				    "finger: %s: no such user\n", *p);
2609b50d902SRodney W. Grimes 	else {
2619b50d902SRodney W. Grimes 		while (pw = getpwent())
2629b50d902SRodney W. Grimes 			for (p = argv, ip = used; *p; ++p, ++ip)
2639b50d902SRodney W. Grimes 				if (match(pw, *p)) {
2649b50d902SRodney W. Grimes 					enter_person(pw);
2659b50d902SRodney W. Grimes 					*ip = 1;
2669b50d902SRodney W. Grimes 				}
2679b50d902SRodney W. Grimes 		for (p = argv, ip = used; *p; ++p, ++ip)
2689b50d902SRodney W. Grimes 			if (!*ip)
2699b50d902SRodney W. Grimes 				(void)fprintf(stderr,
2709b50d902SRodney W. Grimes 				    "finger: %s: no such user\n", *p);
2719b50d902SRodney W. Grimes 	}
2729b50d902SRodney W. Grimes 
2739b50d902SRodney W. Grimes 	/* Handle network requests. */
274a5af661eSPaul Traina net:	for (p = nargv; *p;) {
2759b50d902SRodney W. Grimes 		netfinger(*p++);
276a5af661eSPaul Traina 		if (*p || entries)
277a5af661eSPaul Traina 		    printf("\n");
278a5af661eSPaul Traina 	}
2799b50d902SRodney W. Grimes 
2809b50d902SRodney W. Grimes 	if (entries == 0)
2819b50d902SRodney W. Grimes 		return;
2829b50d902SRodney W. Grimes 
2839b50d902SRodney W. Grimes 	/*
2849b50d902SRodney W. Grimes 	 * Scan thru the list of users currently logged in, saving
2859b50d902SRodney W. Grimes 	 * appropriate data whenever a match occurs.
2869b50d902SRodney W. Grimes 	 */
2879b50d902SRodney W. Grimes 	if (!freopen(_PATH_UTMP, "r", stdin))
2889b50d902SRodney W. Grimes 		err("%s: %s", _PATH_UTMP, strerror(errno));
2899b50d902SRodney W. Grimes 	while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
2909b50d902SRodney W. Grimes 		if (!user.ut_name[0])
2919b50d902SRodney W. Grimes 			continue;
2929b50d902SRodney W. Grimes 		if ((pn = find_person(user.ut_name)) == NULL)
2939b50d902SRodney W. Grimes 			continue;
2949b50d902SRodney W. Grimes 		enter_where(&user, pn);
2959b50d902SRodney W. Grimes 	}
2969b50d902SRodney W. Grimes 	if (db)
2979b50d902SRodney W. Grimes 		for (sflag = R_FIRST;; sflag = R_NEXT) {
2989b50d902SRodney W. Grimes 			r = (*db->seq)(db, &key, &data, sflag);
2999b50d902SRodney W. Grimes 			if (r == -1)
3009b50d902SRodney W. Grimes 				err("db seq: %s", strerror(errno));
3019b50d902SRodney W. Grimes 			if (r == 1)
3029b50d902SRodney W. Grimes 				break;
3039b50d902SRodney W. Grimes 			enter_lastlog(*(PERSON **)data.data);
3049b50d902SRodney W. Grimes 		}
3059b50d902SRodney W. Grimes }
306