finger.c revision 146466
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 5387628Sdwmalone#if 0 541590Srgrimes#ifndef lint 5587628Sdwmalonestatic char sccsid[] = "@(#)finger.c 8.5 (Berkeley) 5/4/95"; 5672109Scharnier#endif 5787628Sdwmalone#endif 581590Srgrimes 5987628Sdwmalone#include <sys/cdefs.h> 6087628Sdwmalone__FBSDID("$FreeBSD: head/usr.bin/finger/finger.c 146466 2005-05-21 09:55:10Z ru $"); 6187628Sdwmalone 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 76100521Sume#include <sys/types.h> 77100521Sume#include <sys/socket.h> 7823693Speter#include <db.h> 7923693Speter#include <err.h> 801590Srgrimes#include <pwd.h> 811590Srgrimes#include <stdio.h> 821590Srgrimes#include <stdlib.h> 831590Srgrimes#include <string.h> 8423693Speter#include <time.h> 8523693Speter#include <unistd.h> 8623693Speter#include <utmp.h> 8711759Sache#include <locale.h> 8823693Speter 891590Srgrimes#include "finger.h" 9064775Sbrian#include "pathnames.h" 911590Srgrimes 921590SrgrimesDB *db; 931590Srgrimestime_t now; 94117010Sjmallettint entries, gflag, kflag, lflag, mflag, pplan, sflag, oflag, Tflag; 95106250Ssobomaxsa_family_t family = PF_UNSPEC; 9674586Sacheint d_first = -1; 971590Srgrimeschar tbuf[1024]; 981590Srgrimes 9992920Simpstatic void loginlist(void); 10092920Simpstatic int option(int, char **); 10192920Simpstatic void usage(void); 10292920Simpstatic void userlist(int, char **); 1031590Srgrimes 10487229Smarkmstatic int 105102944Sdwmaloneoption(int argc, char **argv) 1061590Srgrimes{ 1071590Srgrimes int ch; 1081590Srgrimes 1092589Spst optind = 1; /* reset getopt */ 1102537Spst 111117010Sjmallett while ((ch = getopt(argc, argv, "46gklmpshoT")) != -1) 1121590Srgrimes switch(ch) { 113100521Sume case '4': 114100521Sume family = AF_INET; 115100521Sume break; 116100521Sume case '6': 117100521Sume family = AF_INET6; 118100521Sume break; 11999249Smini case 'g': 12099249Smini gflag = 1; 12199249Smini break; 122117010Sjmallett case 'k': 123117010Sjmallett kflag = 1; /* keep going without utmp */ 124117010Sjmallett break; 1251590Srgrimes case 'l': 1261590Srgrimes lflag = 1; /* long format */ 1271590Srgrimes break; 1281590Srgrimes case 'm': 1291590Srgrimes mflag = 1; /* force exact match of names */ 1301590Srgrimes break; 1311590Srgrimes case 'p': 1321590Srgrimes pplan = 1; /* don't show .plan/.project */ 1331590Srgrimes break; 1341590Srgrimes case 's': 1351590Srgrimes sflag = 1; /* short format */ 1361590Srgrimes break; 1372537Spst case 'h': 1382537Spst oflag = 0; /* remote host info */ 1392537Spst break; 1402537Spst case 'o': 1412537Spst oflag = 1; /* office info */ 1422537Spst break; 14314631Solah case 'T': 14414631Solah Tflag = 1; /* disable T/TCP */ 14514631Solah break; 1461590Srgrimes case '?': 1471590Srgrimes default: 14827169Scharnier usage(); 1491590Srgrimes } 1501590Srgrimes 1512589Spst return optind; 1522589Spst} 1532589Spst 15427169Scharnierstatic void 155102944Sdwmaloneusage(void) 15627169Scharnier{ 157146466Sru (void)fprintf(stderr, 158146466Sru "usage: finger [-46gklmpshoT] [user ...] [user@host ...]\n"); 15927169Scharnier exit(1); 16027169Scharnier} 16127169Scharnier 16227169Scharnierint 163102944Sdwmalonemain(int argc, char **argv) 1642589Spst{ 16527169Scharnier int envargc, argcnt; 1662589Spst char *envargv[3]; 16746662Sobrien struct passwd *pw; 16887229Smarkm static char myname[] = "finger"; 1692589Spst 17046662Sobrien if (getuid() == 0 || geteuid() == 0) { 17146662Sobrien if ((pw = getpwnam(UNPRIV_NAME)) && pw->pw_uid > 0) { 17246662Sobrien setgid(pw->pw_gid); 17346662Sobrien setuid(pw->pw_uid); 17446662Sobrien } else { 17546662Sobrien setgid(UNPRIV_UGID); 17646662Sobrien setuid(UNPRIV_UGID); 17746662Sobrien } 17846662Sobrien } 17946662Sobrien 18011811Sache (void) setlocale(LC_ALL, ""); 18111759Sache 1822589Spst /* remove this line to get remote host */ 1832589Spst oflag = 1; /* default to old "office" behavior */ 1842589Spst 1852589Spst /* 1862589Spst * Process environment variables followed by command line arguments. 1872589Spst */ 1882589Spst if ((envargv[1] = getenv("FINGER"))) { 1892589Spst envargc = 2; 19087229Smarkm envargv[0] = myname; 1912589Spst envargv[2] = NULL; 1922589Spst (void) option(envargc, envargv); 1932589Spst } 1942589Spst 1952589Spst argcnt = option(argc, argv); 1962589Spst argc -= argcnt; 1972589Spst argv += argcnt; 1982589Spst 1991590Srgrimes (void)time(&now); 2001590Srgrimes setpassent(1); 2011590Srgrimes if (!*argv) { 2021590Srgrimes /* 2031590Srgrimes * Assign explicit "small" format if no names given and -l 2041590Srgrimes * not selected. Force the -s BEFORE we get names so proper 2051590Srgrimes * screening will be done. 2061590Srgrimes */ 2071590Srgrimes if (!lflag) 2081590Srgrimes sflag = 1; /* if -l not explicit, force -s */ 2091590Srgrimes loginlist(); 2101590Srgrimes if (entries == 0) 2111590Srgrimes (void)printf("No one logged on.\n"); 2121590Srgrimes } else { 2131590Srgrimes userlist(argc, argv); 2141590Srgrimes /* 2151590Srgrimes * Assign explicit "large" format if names given and -s not 2161590Srgrimes * explicitly stated. Force the -l AFTER we get names so any 2171590Srgrimes * remote finger attempts specified won't be mishandled. 2181590Srgrimes */ 2191590Srgrimes if (!sflag) 2201590Srgrimes lflag = 1; /* if -s not explicit, force -l */ 2211590Srgrimes } 22248566Sbillf if (entries) { 2231590Srgrimes if (lflag) 2241590Srgrimes lflag_print(); 2251590Srgrimes else 2261590Srgrimes sflag_print(); 22748566Sbillf } 22823693Speter return (0); 2291590Srgrimes} 2301590Srgrimes 2311590Srgrimesstatic void 232102944Sdwmaloneloginlist(void) 2331590Srgrimes{ 23487229Smarkm PERSON *pn; 2351590Srgrimes DBT data, key; 2361590Srgrimes struct passwd *pw; 2371590Srgrimes struct utmp user; 23887229Smarkm int r, sflag1; 2391590Srgrimes char name[UT_NAMESIZE + 1]; 2401590Srgrimes 241117010Sjmallett if (kflag) 242117010Sjmallett errx(1, "can't list logins without reading utmp"); 243117010Sjmallett 2441590Srgrimes if (!freopen(_PATH_UTMP, "r", stdin)) 24523693Speter err(1, "%s", _PATH_UTMP); 24627169Scharnier name[UT_NAMESIZE] = '\0'; 2471590Srgrimes while (fread((char *)&user, sizeof(user), 1, stdin) == 1) { 2481590Srgrimes if (!user.ut_name[0]) 2491590Srgrimes continue; 2501590Srgrimes if ((pn = find_person(user.ut_name)) == NULL) { 2511590Srgrimes bcopy(user.ut_name, name, UT_NAMESIZE); 2521590Srgrimes if ((pw = getpwnam(name)) == NULL) 2531590Srgrimes continue; 2545369Sjkh if (hide(pw)) 2555369Sjkh continue; 2561590Srgrimes pn = enter_person(pw); 2571590Srgrimes } 2581590Srgrimes enter_where(&user, pn); 2591590Srgrimes } 2601590Srgrimes if (db && lflag) 26187229Smarkm for (sflag1 = R_FIRST;; sflag1 = R_NEXT) { 26223693Speter PERSON *tmp; 26323693Speter 26487229Smarkm r = (*db->seq)(db, &key, &data, sflag1); 2651590Srgrimes if (r == -1) 26623693Speter err(1, "db seq"); 2671590Srgrimes if (r == 1) 2681590Srgrimes break; 26923693Speter memmove(&tmp, data.data, sizeof tmp); 27023693Speter enter_lastlog(tmp); 2711590Srgrimes } 2721590Srgrimes} 2731590Srgrimes 2741590Srgrimesstatic void 275102944Sdwmaloneuserlist(int argc, char **argv) 2761590Srgrimes{ 27787229Smarkm PERSON *pn; 2781590Srgrimes DBT data, key; 2791590Srgrimes struct utmp user; 2801590Srgrimes struct passwd *pw; 28187229Smarkm int r, sflag1, *used, *ip; 2821590Srgrimes char **ap, **nargv, **np, **p; 28364775Sbrian FILE *conf_fp; 28464775Sbrian char conf_alias[LINE_MAX]; 28564775Sbrian char *conf_realname; 28664775Sbrian int conf_length; 2871590Srgrimes 2881590Srgrimes if ((nargv = malloc((argc+1) * sizeof(char *))) == NULL || 2891590Srgrimes (used = calloc(argc, sizeof(int))) == NULL) 29023693Speter err(1, NULL); 2911590Srgrimes 2921590Srgrimes /* Pull out all network requests. */ 2931590Srgrimes for (ap = p = argv, np = nargv; *p; ++p) 2941590Srgrimes if (index(*p, '@')) 2951590Srgrimes *np++ = *p; 2961590Srgrimes else 2971590Srgrimes *ap++ = *p; 2981590Srgrimes 2991590Srgrimes *np++ = NULL; 3001590Srgrimes *ap++ = NULL; 3011590Srgrimes 3021590Srgrimes if (!*argv) 3031590Srgrimes goto net; 3041590Srgrimes 3051590Srgrimes /* 30666563Sbrian * Mark any arguments beginning with '/' as invalid so that we 30766563Sbrian * don't accidently confuse them with expansions from finger.conf 30866563Sbrian */ 30966563Sbrian for (p = argv, ip = used; *p; ++p, ++ip) 31066563Sbrian if (**p == '/') { 31166563Sbrian *ip = 1; 31266563Sbrian warnx("%s: no such user", *p); 31366563Sbrian } 31466563Sbrian 31566563Sbrian /* 31664775Sbrian * Traverse the finger alias configuration file of the form 31764775Sbrian * alias:(user|alias), ignoring comment lines beginning '#'. 31864775Sbrian */ 31964775Sbrian if ((conf_fp = fopen(_PATH_FINGERCONF, "r")) != NULL) { 32064775Sbrian while(fgets(conf_alias, sizeof(conf_alias), conf_fp) != NULL) { 32164775Sbrian conf_length = strlen(conf_alias); 32264775Sbrian if (*conf_alias == '#' || conf_alias[--conf_length] != '\n') 32364775Sbrian continue; 32464775Sbrian conf_alias[conf_length] = '\0'; /* Remove trailing LF */ 32564775Sbrian if ((conf_realname = strchr(conf_alias, ':')) == NULL) 32664775Sbrian continue; 32764775Sbrian *conf_realname = '\0'; /* Replace : with NUL */ 32864775Sbrian for (p = argv; *p; ++p) { 329126960Sbde if (strcmp(*p, conf_alias) == 0) { 33064775Sbrian if ((*p = strdup(conf_realname+1)) == NULL) { 33164775Sbrian err(1, NULL); 33264775Sbrian } 33364775Sbrian } 33464775Sbrian } 33564775Sbrian } 33664775Sbrian (void)fclose(conf_fp); 33764775Sbrian } 33864775Sbrian 33964775Sbrian /* 3401590Srgrimes * Traverse the list of possible login names and check the login name 34165064Sbrian * and real name against the name specified by the user. If the name 34265064Sbrian * begins with a '/', try to read the file of that name instead of 34365064Sbrian * gathering the traditional finger information. 3441590Srgrimes */ 3451590Srgrimes if (mflag) 34666675Sru for (p = argv, ip = used; *p; ++p, ++ip) { 34766675Sru if (**p != '/' || *ip == 1 || !show_text("", *p, "")) { 34865064Sbrian if (((pw = getpwnam(*p)) != NULL) && !hide(pw)) 34965064Sbrian enter_person(pw); 35066675Sru else if (!*ip) 35165064Sbrian warnx("%s: no such user", *p); 35265064Sbrian } 35365064Sbrian } 3541590Srgrimes else { 35565787Sbrian while ((pw = getpwent()) != NULL) { 3561590Srgrimes for (p = argv, ip = used; *p; ++p, ++ip) 35765064Sbrian if (**p == '/' && *ip != 1 35865787Sbrian && show_text("", *p, "")) 35965064Sbrian *ip = 1; 36065787Sbrian else if (match(pw, *p) && !hide(pw)) { 3611590Srgrimes enter_person(pw); 3621590Srgrimes *ip = 1; 3631590Srgrimes } 3645369Sjkh } 3651590Srgrimes for (p = argv, ip = used; *p; ++p, ++ip) 3661590Srgrimes if (!*ip) 36727169Scharnier warnx("%s: no such user", *p); 3681590Srgrimes } 3691590Srgrimes 3701590Srgrimes /* Handle network requests. */ 3714991Spstnet: for (p = nargv; *p;) { 3721590Srgrimes netfinger(*p++); 3734991Spst if (*p || entries) 3744991Spst printf("\n"); 3754991Spst } 3761590Srgrimes 3771590Srgrimes if (entries == 0) 3781590Srgrimes return; 3791590Srgrimes 380117010Sjmallett if (kflag) 381117010Sjmallett return; 382117010Sjmallett 3831590Srgrimes /* 3841590Srgrimes * Scan thru the list of users currently logged in, saving 3851590Srgrimes * appropriate data whenever a match occurs. 3861590Srgrimes */ 3871590Srgrimes if (!freopen(_PATH_UTMP, "r", stdin)) 38823693Speter err(1, "%s", _PATH_UTMP); 3891590Srgrimes while (fread((char *)&user, sizeof(user), 1, stdin) == 1) { 3901590Srgrimes if (!user.ut_name[0]) 3911590Srgrimes continue; 3921590Srgrimes if ((pn = find_person(user.ut_name)) == NULL) 3931590Srgrimes continue; 3941590Srgrimes enter_where(&user, pn); 3951590Srgrimes } 3961590Srgrimes if (db) 39787229Smarkm for (sflag1 = R_FIRST;; sflag1 = R_NEXT) { 39823693Speter PERSON *tmp; 39923693Speter 40087229Smarkm r = (*db->seq)(db, &key, &data, sflag1); 4011590Srgrimes if (r == -1) 40223693Speter err(1, "db seq"); 4031590Srgrimes if (r == 1) 4041590Srgrimes break; 40523693Speter memmove(&tmp, data.data, sizeof tmp); 40623693Speter enter_lastlog(tmp); 4071590Srgrimes } 4081590Srgrimes} 409