finger.c revision 11811
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 541590Srgrimesstatic char sccsid[] = "@(#)finger.c 8.2 (Berkeley) 9/30/93"; 551590Srgrimes#endif /* not lint */ 561590Srgrimes 571590Srgrimes/* 581590Srgrimes * Finger prints out information about users. It is not portable since 591590Srgrimes * certain fields (e.g. the full user name, office, and phone numbers) are 601590Srgrimes * extracted from the gecos field of the passwd file which other UNIXes 611590Srgrimes * may not have or may use for other things. 621590Srgrimes * 631590Srgrimes * There are currently two output formats; the short format is one line 641590Srgrimes * per user and displays login name, tty, login time, real name, idle time, 652537Spst * and either remote host information (default) or office location/phone 662537Spst * number, depending on if -h or -o is used respectively. 672537Spst * The long format gives the same information (in a more legible format) as 682537Spst * well as home directory, shell, mail info, and .plan/.project files. 691590Srgrimes */ 701590Srgrimes 711590Srgrimes#include <sys/param.h> 721590Srgrimes#include <fcntl.h> 731590Srgrimes#include <time.h> 741590Srgrimes#include <pwd.h> 751590Srgrimes#include <utmp.h> 761590Srgrimes#include <errno.h> 771590Srgrimes#include <stdio.h> 781590Srgrimes#include <stdlib.h> 791590Srgrimes#include <string.h> 801590Srgrimes#include <db.h> 8111759Sache#include <locale.h> 821590Srgrimes#include "finger.h" 831590Srgrimes 841590SrgrimesDB *db; 851590Srgrimestime_t now; 862537Spstint entries, lflag, mflag, pplan, sflag, oflag; 871590Srgrimeschar tbuf[1024]; 881590Srgrimes 891590Srgrimesstatic void loginlist __P((void)); 901590Srgrimesstatic void userlist __P((int, char **)); 911590Srgrimes 922589Spstint 932589Spstoption(argc, argv) 941590Srgrimes int argc; 951590Srgrimes char **argv; 961590Srgrimes{ 971590Srgrimes int ch; 981590Srgrimes 992589Spst optind = 1; /* reset getopt */ 1002537Spst 1012537Spst while ((ch = getopt(argc, argv, "lmpsho")) != EOF) 1021590Srgrimes switch(ch) { 1031590Srgrimes case 'l': 1041590Srgrimes lflag = 1; /* long format */ 1051590Srgrimes break; 1061590Srgrimes case 'm': 1071590Srgrimes mflag = 1; /* force exact match of names */ 1081590Srgrimes break; 1091590Srgrimes case 'p': 1101590Srgrimes pplan = 1; /* don't show .plan/.project */ 1111590Srgrimes break; 1121590Srgrimes case 's': 1131590Srgrimes sflag = 1; /* short format */ 1141590Srgrimes break; 1152537Spst case 'h': 1162537Spst oflag = 0; /* remote host info */ 1172537Spst break; 1182537Spst case 'o': 1192537Spst oflag = 1; /* office info */ 1202537Spst break; 1211590Srgrimes case '?': 1221590Srgrimes default: 1231590Srgrimes (void)fprintf(stderr, 1242537Spst "usage: finger [-lmpsho] [login ...]\n"); 1251590Srgrimes exit(1); 1261590Srgrimes } 1271590Srgrimes 1282589Spst return optind; 1292589Spst} 1302589Spst 1312589Spstmain(argc, argv) 1322589Spst int argc; 1332589Spst char **argv; 1342589Spst{ 1352589Spst int ch, envargc, argcnt; 1362589Spst char *envargv[3]; 1372589Spst 13811811Sache (void) setlocale(LC_ALL, ""); 13911759Sache 1402589Spst /* remove this line to get remote host */ 1412589Spst oflag = 1; /* default to old "office" behavior */ 1422589Spst 1432589Spst /* 1442589Spst * Process environment variables followed by command line arguments. 1452589Spst */ 1462589Spst if ((envargv[1] = getenv("FINGER"))) { 1472589Spst envargc = 2; 1482589Spst envargv[0] = "finger"; 1492589Spst envargv[2] = NULL; 1502589Spst (void) option(envargc, envargv); 1512589Spst } 1522589Spst 1532589Spst argcnt = option(argc, argv); 1542589Spst argc -= argcnt; 1552589Spst argv += argcnt; 1562589Spst 1571590Srgrimes (void)time(&now); 1581590Srgrimes setpassent(1); 1591590Srgrimes if (!*argv) { 1601590Srgrimes /* 1611590Srgrimes * Assign explicit "small" format if no names given and -l 1621590Srgrimes * not selected. Force the -s BEFORE we get names so proper 1631590Srgrimes * screening will be done. 1641590Srgrimes */ 1651590Srgrimes if (!lflag) 1661590Srgrimes sflag = 1; /* if -l not explicit, force -s */ 1671590Srgrimes loginlist(); 1681590Srgrimes if (entries == 0) 1691590Srgrimes (void)printf("No one logged on.\n"); 1701590Srgrimes } else { 1711590Srgrimes userlist(argc, argv); 1721590Srgrimes /* 1731590Srgrimes * Assign explicit "large" format if names given and -s not 1741590Srgrimes * explicitly stated. Force the -l AFTER we get names so any 1751590Srgrimes * remote finger attempts specified won't be mishandled. 1761590Srgrimes */ 1771590Srgrimes if (!sflag) 1781590Srgrimes lflag = 1; /* if -s not explicit, force -l */ 1791590Srgrimes } 1801590Srgrimes if (entries) 1811590Srgrimes if (lflag) 1821590Srgrimes lflag_print(); 1831590Srgrimes else 1841590Srgrimes sflag_print(); 1851590Srgrimes exit(0); 1861590Srgrimes} 1871590Srgrimes 1881590Srgrimesstatic void 1891590Srgrimesloginlist() 1901590Srgrimes{ 1911590Srgrimes register PERSON *pn; 1921590Srgrimes DBT data, key; 1931590Srgrimes struct passwd *pw; 1941590Srgrimes struct utmp user; 1951590Srgrimes int r, sflag; 1961590Srgrimes char name[UT_NAMESIZE + 1]; 1971590Srgrimes 1981590Srgrimes if (!freopen(_PATH_UTMP, "r", stdin)) 1991590Srgrimes err("%s: %s", _PATH_UTMP, strerror(errno)); 2001590Srgrimes name[UT_NAMESIZE] = NULL; 2011590Srgrimes while (fread((char *)&user, sizeof(user), 1, stdin) == 1) { 2021590Srgrimes if (!user.ut_name[0]) 2031590Srgrimes continue; 2041590Srgrimes if ((pn = find_person(user.ut_name)) == NULL) { 2051590Srgrimes bcopy(user.ut_name, name, UT_NAMESIZE); 2061590Srgrimes if ((pw = getpwnam(name)) == NULL) 2071590Srgrimes continue; 2085369Sjkh if (hide(pw)) 2095369Sjkh continue; 2101590Srgrimes pn = enter_person(pw); 2111590Srgrimes } 2121590Srgrimes enter_where(&user, pn); 2131590Srgrimes } 2141590Srgrimes if (db && lflag) 2151590Srgrimes for (sflag = R_FIRST;; sflag = R_NEXT) { 2161590Srgrimes r = (*db->seq)(db, &key, &data, sflag); 2171590Srgrimes if (r == -1) 2181590Srgrimes err("db seq: %s", strerror(errno)); 2191590Srgrimes if (r == 1) 2201590Srgrimes break; 2211590Srgrimes enter_lastlog(*(PERSON **)data.data); 2221590Srgrimes } 2231590Srgrimes} 2241590Srgrimes 2251590Srgrimesstatic void 2261590Srgrimesuserlist(argc, argv) 2271590Srgrimes register int argc; 2281590Srgrimes register char **argv; 2291590Srgrimes{ 2301590Srgrimes register PERSON *pn; 2311590Srgrimes DBT data, key; 2321590Srgrimes struct utmp user; 2331590Srgrimes struct passwd *pw; 2341590Srgrimes int r, sflag, *used, *ip; 2351590Srgrimes char **ap, **nargv, **np, **p; 2361590Srgrimes 2371590Srgrimes if ((nargv = malloc((argc+1) * sizeof(char *))) == NULL || 2381590Srgrimes (used = calloc(argc, sizeof(int))) == NULL) 2391590Srgrimes err("%s", strerror(errno)); 2401590Srgrimes 2411590Srgrimes /* Pull out all network requests. */ 2421590Srgrimes for (ap = p = argv, np = nargv; *p; ++p) 2431590Srgrimes if (index(*p, '@')) 2441590Srgrimes *np++ = *p; 2451590Srgrimes else 2461590Srgrimes *ap++ = *p; 2471590Srgrimes 2481590Srgrimes *np++ = NULL; 2491590Srgrimes *ap++ = NULL; 2501590Srgrimes 2511590Srgrimes if (!*argv) 2521590Srgrimes goto net; 2531590Srgrimes 2541590Srgrimes /* 2551590Srgrimes * Traverse the list of possible login names and check the login name 2561590Srgrimes * and real name against the name specified by the user. 2571590Srgrimes */ 2581590Srgrimes if (mflag) 2591590Srgrimes for (p = argv; *p; ++p) 2605369Sjkh if ((pw = getpwnam(*p)) && !hide(pw)) 2611590Srgrimes enter_person(pw); 2621590Srgrimes else 2631590Srgrimes (void)fprintf(stderr, 2641590Srgrimes "finger: %s: no such user\n", *p); 2651590Srgrimes else { 2665369Sjkh while (pw = getpwent()) { 2671590Srgrimes for (p = argv, ip = used; *p; ++p, ++ip) 2689280Sache if (match(pw, *p) && !hide(pw)) { 2691590Srgrimes enter_person(pw); 2701590Srgrimes *ip = 1; 2711590Srgrimes } 2725369Sjkh } 2731590Srgrimes for (p = argv, ip = used; *p; ++p, ++ip) 2741590Srgrimes if (!*ip) 2751590Srgrimes (void)fprintf(stderr, 2761590Srgrimes "finger: %s: no such user\n", *p); 2771590Srgrimes } 2781590Srgrimes 2791590Srgrimes /* Handle network requests. */ 2804991Spstnet: for (p = nargv; *p;) { 2811590Srgrimes netfinger(*p++); 2824991Spst if (*p || entries) 2834991Spst printf("\n"); 2844991Spst } 2851590Srgrimes 2861590Srgrimes if (entries == 0) 2871590Srgrimes return; 2881590Srgrimes 2891590Srgrimes /* 2901590Srgrimes * Scan thru the list of users currently logged in, saving 2911590Srgrimes * appropriate data whenever a match occurs. 2921590Srgrimes */ 2931590Srgrimes if (!freopen(_PATH_UTMP, "r", stdin)) 2941590Srgrimes err("%s: %s", _PATH_UTMP, strerror(errno)); 2951590Srgrimes while (fread((char *)&user, sizeof(user), 1, stdin) == 1) { 2961590Srgrimes if (!user.ut_name[0]) 2971590Srgrimes continue; 2981590Srgrimes if ((pn = find_person(user.ut_name)) == NULL) 2991590Srgrimes continue; 3001590Srgrimes enter_where(&user, pn); 3011590Srgrimes } 3021590Srgrimes if (db) 3031590Srgrimes for (sflag = R_FIRST;; sflag = R_NEXT) { 3041590Srgrimes r = (*db->seq)(db, &key, &data, sflag); 3051590Srgrimes if (r == -1) 3061590Srgrimes err("db seq: %s", strerror(errno)); 3071590Srgrimes if (r == 1) 3081590Srgrimes break; 3091590Srgrimes enter_lastlog(*(PERSON **)data.data); 3101590Srgrimes } 3111590Srgrimes} 312