finger.c revision 67467
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 4867467Srustatic const 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[] = 5850477Speter "$FreeBSD: head/usr.bin/finger/finger.c 67467 2000-10-23 12:18:34Z ru $"; 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> 9164775Sbrian#include <sys/syslimits.h> 9223693Speter 931590Srgrimes#include "finger.h" 9464775Sbrian#include "pathnames.h" 951590Srgrimes 961590SrgrimesDB *db; 971590Srgrimestime_t now; 9814631Solahint entries, lflag, mflag, pplan, sflag, oflag, Tflag; 991590Srgrimeschar tbuf[1024]; 1001590Srgrimes 1011590Srgrimesstatic void loginlist __P((void)); 10227169Scharnierstatic void usage __P((void)); 1031590Srgrimesstatic void userlist __P((int, char **)); 1041590Srgrimes 1052589Spstint 1062589Spstoption(argc, argv) 1071590Srgrimes int argc; 1081590Srgrimes char **argv; 1091590Srgrimes{ 1101590Srgrimes int ch; 1111590Srgrimes 1122589Spst optind = 1; /* reset getopt */ 1132537Spst 11424360Simp while ((ch = getopt(argc, argv, "lmpshoT")) != -1) 1151590Srgrimes switch(ch) { 1161590Srgrimes case 'l': 1171590Srgrimes lflag = 1; /* long format */ 1181590Srgrimes break; 1191590Srgrimes case 'm': 1201590Srgrimes mflag = 1; /* force exact match of names */ 1211590Srgrimes break; 1221590Srgrimes case 'p': 1231590Srgrimes pplan = 1; /* don't show .plan/.project */ 1241590Srgrimes break; 1251590Srgrimes case 's': 1261590Srgrimes sflag = 1; /* short format */ 1271590Srgrimes break; 1282537Spst case 'h': 1292537Spst oflag = 0; /* remote host info */ 1302537Spst break; 1312537Spst case 'o': 1322537Spst oflag = 1; /* office info */ 1332537Spst break; 13414631Solah case 'T': 13514631Solah Tflag = 1; /* disable T/TCP */ 13614631Solah break; 1371590Srgrimes case '?': 1381590Srgrimes default: 13927169Scharnier usage(); 1401590Srgrimes } 1411590Srgrimes 1422589Spst return optind; 1432589Spst} 1442589Spst 14527169Scharnierstatic void 14627169Scharnierusage() 14727169Scharnier{ 14827169Scharnier (void)fprintf(stderr, "usage: finger [-lmpshoT] [login ...]\n"); 14927169Scharnier exit(1); 15027169Scharnier} 15127169Scharnier 15227169Scharnierint 1532589Spstmain(argc, argv) 1542589Spst int argc; 1552589Spst char **argv; 1562589Spst{ 15727169Scharnier int envargc, argcnt; 1582589Spst char *envargv[3]; 15946662Sobrien struct passwd *pw; 1602589Spst 16146662Sobrien if (getuid() == 0 || geteuid() == 0) { 16246662Sobrien if ((pw = getpwnam(UNPRIV_NAME)) && pw->pw_uid > 0) { 16346662Sobrien setgid(pw->pw_gid); 16446662Sobrien setuid(pw->pw_uid); 16546662Sobrien } else { 16646662Sobrien setgid(UNPRIV_UGID); 16746662Sobrien setuid(UNPRIV_UGID); 16846662Sobrien } 16946662Sobrien } 17046662Sobrien 17111811Sache (void) setlocale(LC_ALL, ""); 17211759Sache 1732589Spst /* remove this line to get remote host */ 1742589Spst oflag = 1; /* default to old "office" behavior */ 1752589Spst 1762589Spst /* 1772589Spst * Process environment variables followed by command line arguments. 1782589Spst */ 1792589Spst if ((envargv[1] = getenv("FINGER"))) { 1802589Spst envargc = 2; 1812589Spst envargv[0] = "finger"; 1822589Spst envargv[2] = NULL; 1832589Spst (void) option(envargc, envargv); 1842589Spst } 1852589Spst 1862589Spst argcnt = option(argc, argv); 1872589Spst argc -= argcnt; 1882589Spst argv += argcnt; 1892589Spst 1901590Srgrimes (void)time(&now); 1911590Srgrimes setpassent(1); 1921590Srgrimes if (!*argv) { 1931590Srgrimes /* 1941590Srgrimes * Assign explicit "small" format if no names given and -l 1951590Srgrimes * not selected. Force the -s BEFORE we get names so proper 1961590Srgrimes * screening will be done. 1971590Srgrimes */ 1981590Srgrimes if (!lflag) 1991590Srgrimes sflag = 1; /* if -l not explicit, force -s */ 2001590Srgrimes loginlist(); 2011590Srgrimes if (entries == 0) 2021590Srgrimes (void)printf("No one logged on.\n"); 2031590Srgrimes } else { 2041590Srgrimes userlist(argc, argv); 2051590Srgrimes /* 2061590Srgrimes * Assign explicit "large" format if names given and -s not 2071590Srgrimes * explicitly stated. Force the -l AFTER we get names so any 2081590Srgrimes * remote finger attempts specified won't be mishandled. 2091590Srgrimes */ 2101590Srgrimes if (!sflag) 2111590Srgrimes lflag = 1; /* if -s not explicit, force -l */ 2121590Srgrimes } 21348566Sbillf if (entries) { 2141590Srgrimes if (lflag) 2151590Srgrimes lflag_print(); 2161590Srgrimes else 2171590Srgrimes sflag_print(); 21848566Sbillf } 21923693Speter return (0); 2201590Srgrimes} 2211590Srgrimes 2221590Srgrimesstatic void 2231590Srgrimesloginlist() 2241590Srgrimes{ 2251590Srgrimes register PERSON *pn; 2261590Srgrimes DBT data, key; 2271590Srgrimes struct passwd *pw; 2281590Srgrimes struct utmp user; 2291590Srgrimes int r, sflag; 2301590Srgrimes char name[UT_NAMESIZE + 1]; 2311590Srgrimes 2321590Srgrimes if (!freopen(_PATH_UTMP, "r", stdin)) 23323693Speter err(1, "%s", _PATH_UTMP); 23427169Scharnier name[UT_NAMESIZE] = '\0'; 2351590Srgrimes while (fread((char *)&user, sizeof(user), 1, stdin) == 1) { 2361590Srgrimes if (!user.ut_name[0]) 2371590Srgrimes continue; 2381590Srgrimes if ((pn = find_person(user.ut_name)) == NULL) { 2391590Srgrimes bcopy(user.ut_name, name, UT_NAMESIZE); 2401590Srgrimes if ((pw = getpwnam(name)) == NULL) 2411590Srgrimes continue; 2425369Sjkh if (hide(pw)) 2435369Sjkh continue; 2441590Srgrimes pn = enter_person(pw); 2451590Srgrimes } 2461590Srgrimes enter_where(&user, pn); 2471590Srgrimes } 2481590Srgrimes if (db && lflag) 2491590Srgrimes for (sflag = R_FIRST;; sflag = R_NEXT) { 25023693Speter PERSON *tmp; 25123693Speter 2521590Srgrimes r = (*db->seq)(db, &key, &data, sflag); 2531590Srgrimes if (r == -1) 25423693Speter err(1, "db seq"); 2551590Srgrimes if (r == 1) 2561590Srgrimes break; 25723693Speter memmove(&tmp, data.data, sizeof tmp); 25823693Speter enter_lastlog(tmp); 2591590Srgrimes } 2601590Srgrimes} 2611590Srgrimes 2621590Srgrimesstatic void 2631590Srgrimesuserlist(argc, argv) 2641590Srgrimes register int argc; 2651590Srgrimes register char **argv; 2661590Srgrimes{ 2671590Srgrimes register PERSON *pn; 2681590Srgrimes DBT data, key; 2691590Srgrimes struct utmp user; 2701590Srgrimes struct passwd *pw; 2711590Srgrimes int r, sflag, *used, *ip; 2721590Srgrimes char **ap, **nargv, **np, **p; 27364775Sbrian FILE *conf_fp; 27464775Sbrian char conf_alias[LINE_MAX]; 27564775Sbrian char *conf_realname; 27664775Sbrian int conf_length; 2771590Srgrimes 2781590Srgrimes if ((nargv = malloc((argc+1) * sizeof(char *))) == NULL || 2791590Srgrimes (used = calloc(argc, sizeof(int))) == NULL) 28023693Speter err(1, NULL); 2811590Srgrimes 2821590Srgrimes /* Pull out all network requests. */ 2831590Srgrimes for (ap = p = argv, np = nargv; *p; ++p) 2841590Srgrimes if (index(*p, '@')) 2851590Srgrimes *np++ = *p; 2861590Srgrimes else 2871590Srgrimes *ap++ = *p; 2881590Srgrimes 2891590Srgrimes *np++ = NULL; 2901590Srgrimes *ap++ = NULL; 2911590Srgrimes 2921590Srgrimes if (!*argv) 2931590Srgrimes goto net; 2941590Srgrimes 2951590Srgrimes /* 29666563Sbrian * Mark any arguments beginning with '/' as invalid so that we 29766563Sbrian * don't accidently confuse them with expansions from finger.conf 29866563Sbrian */ 29966563Sbrian for (p = argv, ip = used; *p; ++p, ++ip) 30066563Sbrian if (**p == '/') { 30166563Sbrian *ip = 1; 30266563Sbrian warnx("%s: no such user", *p); 30366563Sbrian } 30466563Sbrian 30566563Sbrian /* 30664775Sbrian * Traverse the finger alias configuration file of the form 30764775Sbrian * alias:(user|alias), ignoring comment lines beginning '#'. 30864775Sbrian */ 30964775Sbrian if ((conf_fp = fopen(_PATH_FINGERCONF, "r")) != NULL) { 31064775Sbrian while(fgets(conf_alias, sizeof(conf_alias), conf_fp) != NULL) { 31164775Sbrian conf_length = strlen(conf_alias); 31264775Sbrian if (*conf_alias == '#' || conf_alias[--conf_length] != '\n') 31364775Sbrian continue; 31464775Sbrian conf_alias[conf_length] = '\0'; /* Remove trailing LF */ 31564775Sbrian if ((conf_realname = strchr(conf_alias, ':')) == NULL) 31664775Sbrian continue; 31764775Sbrian *conf_realname = '\0'; /* Replace : with NUL */ 31864775Sbrian for (p = argv; *p; ++p) { 31964775Sbrian if (strcmp(*p, conf_alias) == NULL) { 32064775Sbrian if ((*p = strdup(conf_realname+1)) == NULL) { 32164775Sbrian err(1, NULL); 32264775Sbrian } 32364775Sbrian } 32464775Sbrian } 32564775Sbrian } 32664775Sbrian (void)fclose(conf_fp); 32764775Sbrian } 32864775Sbrian 32964775Sbrian /* 3301590Srgrimes * Traverse the list of possible login names and check the login name 33165064Sbrian * and real name against the name specified by the user. If the name 33265064Sbrian * begins with a '/', try to read the file of that name instead of 33365064Sbrian * gathering the traditional finger information. 3341590Srgrimes */ 3351590Srgrimes if (mflag) 33666675Sru for (p = argv, ip = used; *p; ++p, ++ip) { 33766675Sru if (**p != '/' || *ip == 1 || !show_text("", *p, "")) { 33865064Sbrian if (((pw = getpwnam(*p)) != NULL) && !hide(pw)) 33965064Sbrian enter_person(pw); 34066675Sru else if (!*ip) 34165064Sbrian warnx("%s: no such user", *p); 34265064Sbrian } 34365064Sbrian } 3441590Srgrimes else { 34565787Sbrian while ((pw = getpwent()) != NULL) { 3461590Srgrimes for (p = argv, ip = used; *p; ++p, ++ip) 34765064Sbrian if (**p == '/' && *ip != 1 34865787Sbrian && show_text("", *p, "")) 34965064Sbrian *ip = 1; 35065787Sbrian else if (match(pw, *p) && !hide(pw)) { 3511590Srgrimes enter_person(pw); 3521590Srgrimes *ip = 1; 3531590Srgrimes } 3545369Sjkh } 3551590Srgrimes for (p = argv, ip = used; *p; ++p, ++ip) 3561590Srgrimes if (!*ip) 35727169Scharnier warnx("%s: no such user", *p); 3581590Srgrimes } 3591590Srgrimes 3601590Srgrimes /* Handle network requests. */ 3614991Spstnet: for (p = nargv; *p;) { 3621590Srgrimes netfinger(*p++); 3634991Spst if (*p || entries) 3644991Spst printf("\n"); 3654991Spst } 3661590Srgrimes 3671590Srgrimes if (entries == 0) 3681590Srgrimes return; 3691590Srgrimes 3701590Srgrimes /* 3711590Srgrimes * Scan thru the list of users currently logged in, saving 3721590Srgrimes * appropriate data whenever a match occurs. 3731590Srgrimes */ 3741590Srgrimes if (!freopen(_PATH_UTMP, "r", stdin)) 37523693Speter err(1, "%s", _PATH_UTMP); 3761590Srgrimes while (fread((char *)&user, sizeof(user), 1, stdin) == 1) { 3771590Srgrimes if (!user.ut_name[0]) 3781590Srgrimes continue; 3791590Srgrimes if ((pn = find_person(user.ut_name)) == NULL) 3801590Srgrimes continue; 3811590Srgrimes enter_where(&user, pn); 3821590Srgrimes } 3831590Srgrimes if (db) 3841590Srgrimes for (sflag = R_FIRST;; sflag = R_NEXT) { 38523693Speter PERSON *tmp; 38623693Speter 3871590Srgrimes r = (*db->seq)(db, &key, &data, sflag); 3881590Srgrimes if (r == -1) 38923693Speter err(1, "db seq"); 3901590Srgrimes if (r == 1) 3911590Srgrimes break; 39223693Speter memmove(&tmp, data.data, sizeof tmp); 39323693Speter enter_lastlog(tmp); 3941590Srgrimes } 3951590Srgrimes} 396