finger.c revision 27169
11590Srgrimes/* 21590Srgrimes * Copyright (c) 1989, 1993 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * This code is derived from software contributed to Berkeley by 61590Srgrimes * Tony Nardo of the Johns Hopkins University/Applied Physics Lab. 71590Srgrimes * 81590Srgrimes * Redistribution and use in source and binary forms, with or without 91590Srgrimes * modification, are permitted provided that the following conditions 101590Srgrimes * are met: 111590Srgrimes * 1. Redistributions of source code must retain the above copyright 121590Srgrimes * notice, this list of conditions and the following disclaimer. 131590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141590Srgrimes * notice, this list of conditions and the following disclaimer in the 151590Srgrimes * documentation and/or other materials provided with the distribution. 161590Srgrimes * 3. All advertising materials mentioning features or use of this software 171590Srgrimes * must display the following acknowledgement: 181590Srgrimes * This product includes software developed by the University of 191590Srgrimes * California, Berkeley and its contributors. 201590Srgrimes * 4. Neither the name of the University nor the names of its contributors 211590Srgrimes * may be used to endorse or promote products derived from this software 221590Srgrimes * without specific prior written permission. 231590Srgrimes * 241590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341590Srgrimes * SUCH DAMAGE. 351590Srgrimes */ 361590Srgrimes 372537Spst/* 382537Spst * Luke Mewburn <lm@rmit.edu.au> added the following on 940622: 392537Spst * - mail status ("No Mail", "Mail read:...", or "New Mail ..., 402537Spst * Unread since ...".) 412537Spst * - 4 digit phone extensions (3210 is printed as x3210.) 422537Spst * - host/office toggling in short format with -h & -o. 432537Spst * - short day names (`Tue' printed instead of `Jun 21' if the 442537Spst * login time is < 6 days. 452537Spst */ 462537Spst 471590Srgrimes#ifndef lint 481590Srgrimesstatic char copyright[] = 491590Srgrimes"@(#) Copyright (c) 1989, 1993\n\ 501590Srgrimes The Regents of the University of California. All rights reserved.\n"; 511590Srgrimes#endif /* not lint */ 521590Srgrimes 531590Srgrimes#ifndef lint 5427169Scharnier#if 0 5523693Speterstatic char sccsid[] = "@(#)finger.c 8.5 (Berkeley) 5/4/95"; 5627169Scharnier#else 5727169Scharnierstatic const char rcsid[] = 5827169Scharnier "$Id$"; 5927169Scharnier#endif 601590Srgrimes#endif /* not lint */ 611590Srgrimes 621590Srgrimes/* 631590Srgrimes * Finger prints out information about users. It is not portable since 641590Srgrimes * certain fields (e.g. the full user name, office, and phone numbers) are 651590Srgrimes * extracted from the gecos field of the passwd file which other UNIXes 661590Srgrimes * may not have or may use for other things. 671590Srgrimes * 681590Srgrimes * There are currently two output formats; the short format is one line 691590Srgrimes * per user and displays login name, tty, login time, real name, idle time, 702537Spst * and either remote host information (default) or office location/phone 712537Spst * number, depending on if -h or -o is used respectively. 722537Spst * The long format gives the same information (in a more legible format) as 732537Spst * well as home directory, shell, mail info, and .plan/.project files. 741590Srgrimes */ 751590Srgrimes 761590Srgrimes#include <sys/param.h> 7723693Speter 7823693Speter#include <db.h> 7923693Speter#include <err.h> 8023693Speter#include <errno.h> 811590Srgrimes#include <fcntl.h> 821590Srgrimes#include <pwd.h> 831590Srgrimes#include <stdio.h> 841590Srgrimes#include <stdlib.h> 851590Srgrimes#include <string.h> 8623693Speter#include <time.h> 8723693Speter#include <unistd.h> 8823693Speter#include <utmp.h> 891590Srgrimes#include <db.h> 9011759Sache#include <locale.h> 9123693Speter 921590Srgrimes#include "finger.h" 931590Srgrimes 941590SrgrimesDB *db; 951590Srgrimestime_t now; 9614631Solahint entries, lflag, mflag, pplan, sflag, oflag, Tflag; 971590Srgrimeschar tbuf[1024]; 981590Srgrimes 991590Srgrimesstatic void loginlist __P((void)); 10027169Scharnierstatic void usage __P((void)); 1011590Srgrimesstatic void userlist __P((int, char **)); 1021590Srgrimes 1032589Spstint 1042589Spstoption(argc, argv) 1051590Srgrimes int argc; 1061590Srgrimes char **argv; 1071590Srgrimes{ 1081590Srgrimes int ch; 1091590Srgrimes 1102589Spst optind = 1; /* reset getopt */ 1112537Spst 11224360Simp while ((ch = getopt(argc, argv, "lmpshoT")) != -1) 1131590Srgrimes switch(ch) { 1141590Srgrimes case 'l': 1151590Srgrimes lflag = 1; /* long format */ 1161590Srgrimes break; 1171590Srgrimes case 'm': 1181590Srgrimes mflag = 1; /* force exact match of names */ 1191590Srgrimes break; 1201590Srgrimes case 'p': 1211590Srgrimes pplan = 1; /* don't show .plan/.project */ 1221590Srgrimes break; 1231590Srgrimes case 's': 1241590Srgrimes sflag = 1; /* short format */ 1251590Srgrimes break; 1262537Spst case 'h': 1272537Spst oflag = 0; /* remote host info */ 1282537Spst break; 1292537Spst case 'o': 1302537Spst oflag = 1; /* office info */ 1312537Spst break; 13214631Solah case 'T': 13314631Solah Tflag = 1; /* disable T/TCP */ 13414631Solah break; 1351590Srgrimes case '?': 1361590Srgrimes default: 13727169Scharnier usage(); 1381590Srgrimes } 1391590Srgrimes 1402589Spst return optind; 1412589Spst} 1422589Spst 14327169Scharnierstatic void 14427169Scharnierusage() 14527169Scharnier{ 14627169Scharnier (void)fprintf(stderr, "usage: finger [-lmpshoT] [login ...]\n"); 14727169Scharnier exit(1); 14827169Scharnier} 14927169Scharnier 15027169Scharnierint 1512589Spstmain(argc, argv) 1522589Spst int argc; 1532589Spst char **argv; 1542589Spst{ 15527169Scharnier int envargc, argcnt; 1562589Spst char *envargv[3]; 1572589Spst 15811811Sache (void) setlocale(LC_ALL, ""); 15911759Sache 1602589Spst /* remove this line to get remote host */ 1612589Spst oflag = 1; /* default to old "office" behavior */ 1622589Spst 1632589Spst /* 1642589Spst * Process environment variables followed by command line arguments. 1652589Spst */ 1662589Spst if ((envargv[1] = getenv("FINGER"))) { 1672589Spst envargc = 2; 1682589Spst envargv[0] = "finger"; 1692589Spst envargv[2] = NULL; 1702589Spst (void) option(envargc, envargv); 1712589Spst } 1722589Spst 1732589Spst argcnt = option(argc, argv); 1742589Spst argc -= argcnt; 1752589Spst argv += argcnt; 1762589Spst 1771590Srgrimes (void)time(&now); 1781590Srgrimes setpassent(1); 1791590Srgrimes if (!*argv) { 1801590Srgrimes /* 1811590Srgrimes * Assign explicit "small" format if no names given and -l 1821590Srgrimes * not selected. Force the -s BEFORE we get names so proper 1831590Srgrimes * screening will be done. 1841590Srgrimes */ 1851590Srgrimes if (!lflag) 1861590Srgrimes sflag = 1; /* if -l not explicit, force -s */ 1871590Srgrimes loginlist(); 1881590Srgrimes if (entries == 0) 1891590Srgrimes (void)printf("No one logged on.\n"); 1901590Srgrimes } else { 1911590Srgrimes userlist(argc, argv); 1921590Srgrimes /* 1931590Srgrimes * Assign explicit "large" format if names given and -s not 1941590Srgrimes * explicitly stated. Force the -l AFTER we get names so any 1951590Srgrimes * remote finger attempts specified won't be mishandled. 1961590Srgrimes */ 1971590Srgrimes if (!sflag) 1981590Srgrimes lflag = 1; /* if -s not explicit, force -l */ 1991590Srgrimes } 2001590Srgrimes if (entries) 2011590Srgrimes if (lflag) 2021590Srgrimes lflag_print(); 2031590Srgrimes else 2041590Srgrimes sflag_print(); 20523693Speter return (0); 2061590Srgrimes} 2071590Srgrimes 2081590Srgrimesstatic void 2091590Srgrimesloginlist() 2101590Srgrimes{ 2111590Srgrimes register PERSON *pn; 2121590Srgrimes DBT data, key; 2131590Srgrimes struct passwd *pw; 2141590Srgrimes struct utmp user; 2151590Srgrimes int r, sflag; 2161590Srgrimes char name[UT_NAMESIZE + 1]; 2171590Srgrimes 2181590Srgrimes if (!freopen(_PATH_UTMP, "r", stdin)) 21923693Speter err(1, "%s", _PATH_UTMP); 22027169Scharnier name[UT_NAMESIZE] = '\0'; 2211590Srgrimes while (fread((char *)&user, sizeof(user), 1, stdin) == 1) { 2221590Srgrimes if (!user.ut_name[0]) 2231590Srgrimes continue; 2241590Srgrimes if ((pn = find_person(user.ut_name)) == NULL) { 2251590Srgrimes bcopy(user.ut_name, name, UT_NAMESIZE); 2261590Srgrimes if ((pw = getpwnam(name)) == NULL) 2271590Srgrimes continue; 2285369Sjkh if (hide(pw)) 2295369Sjkh continue; 2301590Srgrimes pn = enter_person(pw); 2311590Srgrimes } 2321590Srgrimes enter_where(&user, pn); 2331590Srgrimes } 2341590Srgrimes if (db && lflag) 2351590Srgrimes for (sflag = R_FIRST;; sflag = R_NEXT) { 23623693Speter PERSON *tmp; 23723693Speter 2381590Srgrimes r = (*db->seq)(db, &key, &data, sflag); 2391590Srgrimes if (r == -1) 24023693Speter err(1, "db seq"); 2411590Srgrimes if (r == 1) 2421590Srgrimes break; 24323693Speter memmove(&tmp, data.data, sizeof tmp); 24423693Speter enter_lastlog(tmp); 2451590Srgrimes } 2461590Srgrimes} 2471590Srgrimes 2481590Srgrimesstatic void 2491590Srgrimesuserlist(argc, argv) 2501590Srgrimes register int argc; 2511590Srgrimes register char **argv; 2521590Srgrimes{ 2531590Srgrimes register PERSON *pn; 2541590Srgrimes DBT data, key; 2551590Srgrimes struct utmp user; 2561590Srgrimes struct passwd *pw; 2571590Srgrimes int r, sflag, *used, *ip; 2581590Srgrimes char **ap, **nargv, **np, **p; 2591590Srgrimes 2601590Srgrimes if ((nargv = malloc((argc+1) * sizeof(char *))) == NULL || 2611590Srgrimes (used = calloc(argc, sizeof(int))) == NULL) 26223693Speter err(1, NULL); 2631590Srgrimes 2641590Srgrimes /* Pull out all network requests. */ 2651590Srgrimes for (ap = p = argv, np = nargv; *p; ++p) 2661590Srgrimes if (index(*p, '@')) 2671590Srgrimes *np++ = *p; 2681590Srgrimes else 2691590Srgrimes *ap++ = *p; 2701590Srgrimes 2711590Srgrimes *np++ = NULL; 2721590Srgrimes *ap++ = NULL; 2731590Srgrimes 2741590Srgrimes if (!*argv) 2751590Srgrimes goto net; 2761590Srgrimes 2771590Srgrimes /* 2781590Srgrimes * Traverse the list of possible login names and check the login name 2791590Srgrimes * and real name against the name specified by the user. 2801590Srgrimes */ 2811590Srgrimes if (mflag) 2821590Srgrimes for (p = argv; *p; ++p) 28323693Speter if (((pw = getpwnam(*p)) != NULL) && !hide(pw)) 2841590Srgrimes enter_person(pw); 2851590Srgrimes else 28627169Scharnier warnx("%s: no such user", *p); 2871590Srgrimes else { 28823693Speter while ((pw = getpwent()) != NULL) { 2891590Srgrimes for (p = argv, ip = used; *p; ++p, ++ip) 2909280Sache if (match(pw, *p) && !hide(pw)) { 2911590Srgrimes enter_person(pw); 2921590Srgrimes *ip = 1; 2931590Srgrimes } 2945369Sjkh } 2951590Srgrimes for (p = argv, ip = used; *p; ++p, ++ip) 2961590Srgrimes if (!*ip) 29727169Scharnier warnx("%s: no such user", *p); 2981590Srgrimes } 2991590Srgrimes 3001590Srgrimes /* Handle network requests. */ 3014991Spstnet: for (p = nargv; *p;) { 3021590Srgrimes netfinger(*p++); 3034991Spst if (*p || entries) 3044991Spst printf("\n"); 3054991Spst } 3061590Srgrimes 3071590Srgrimes if (entries == 0) 3081590Srgrimes return; 3091590Srgrimes 3101590Srgrimes /* 3111590Srgrimes * Scan thru the list of users currently logged in, saving 3121590Srgrimes * appropriate data whenever a match occurs. 3131590Srgrimes */ 3141590Srgrimes if (!freopen(_PATH_UTMP, "r", stdin)) 31523693Speter err(1, "%s", _PATH_UTMP); 3161590Srgrimes while (fread((char *)&user, sizeof(user), 1, stdin) == 1) { 3171590Srgrimes if (!user.ut_name[0]) 3181590Srgrimes continue; 3191590Srgrimes if ((pn = find_person(user.ut_name)) == NULL) 3201590Srgrimes continue; 3211590Srgrimes enter_where(&user, pn); 3221590Srgrimes } 3231590Srgrimes if (db) 3241590Srgrimes for (sflag = R_FIRST;; sflag = R_NEXT) { 32523693Speter PERSON *tmp; 32623693Speter 3271590Srgrimes r = (*db->seq)(db, &key, &data, sflag); 3281590Srgrimes if (r == -1) 32923693Speter err(1, "db seq"); 3301590Srgrimes if (r == 1) 3311590Srgrimes break; 33223693Speter memmove(&tmp, data.data, sizeof tmp); 33323693Speter enter_lastlog(tmp); 3341590Srgrimes } 3351590Srgrimes} 336