1/* $NetBSD: finger.c,v 1.31 2021/10/30 09:12:09 nia Exp $ */ 2 3/* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Tony Nardo of the Johns Hopkins University/Applied Physics Lab. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35/* 36 * Luke Mewburn <lukem@NetBSD.org> added the following on 961121: 37 * - mail status ("No Mail", "Mail read:...", or "New Mail ..., 38 * Unread since ...".) 39 * - 4 digit phone extensions (3210 is printed as x3210.) 40 * - host/office toggling in short format with -h & -o. 41 * - short day names (`Tue' printed instead of `Jun 21' if the 42 * login time is < 6 days. 43 */ 44 45#include <sys/cdefs.h> 46#ifndef lint 47__COPYRIGHT("@(#) Copyright (c) 1989, 1993\ 48 The Regents of the University of California. All rights reserved."); 49#endif /* not lint */ 50 51#ifndef lint 52#if 0 53static char sccsid[] = "@(#)finger.c 8.5 (Berkeley) 5/4/95"; 54#else 55__RCSID("$NetBSD: finger.c,v 1.31 2021/10/30 09:12:09 nia Exp $"); 56#endif 57#endif /* not lint */ 58 59/* 60 * Finger prints out information about users. It is not portable since 61 * certain fields (e.g. the full user name, office, and phone numbers) are 62 * extracted from the gecos field of the passwd file which other UNIXes 63 * may not have or may use for other things. 64 * 65 * There are currently two output formats; the short format is one line 66 * per user and displays login name, tty, login time, real name, idle time, 67 * and either remote host information (default) or office location/phone 68 * number, depending on if -h or -o is used respectively. 69 * The long format gives the same information (in a more legible format) as 70 * well as home directory, shell, mail info, and .plan/.project files. 71 */ 72 73#include <sys/param.h> 74 75#include <db.h> 76#include <err.h> 77#include <errno.h> 78#include <fcntl.h> 79#include <pwd.h> 80#include <stdio.h> 81#include <stdlib.h> 82#include <string.h> 83#include <time.h> 84#include <unistd.h> 85 86#include <locale.h> 87#include <langinfo.h> 88 89#include "utmpentry.h" 90 91#include "finger.h" 92#include "extern.h" 93 94DB *db; 95time_t now; 96int entries, gflag, lflag, mflag, oflag, sflag, eightflag, pplan; 97char tbuf[1024]; 98struct utmpentry *ehead; 99 100static void loginlist(void); 101static void userlist(int, char **); 102 103int 104main(int argc, char **argv) 105{ 106 int ch; 107 108 /* Allow user's locale settings to affect character output. */ 109 setlocale(LC_CTYPE, ""); 110 111 /* 112 * Reset back to the C locale, unless we are using a known 113 * single-byte 8-bit locale. 114 */ 115 if (strncmp(nl_langinfo(CODESET), "ISO8859-", 8)) 116 setlocale(LC_CTYPE, "C"); 117 118 oflag = 1; /* default to old "office" behavior */ 119 120 while ((ch = getopt(argc, argv, "lmpshog8")) != -1) 121 switch(ch) { 122 case 'l': 123 lflag = 1; /* long format */ 124 break; 125 case 'm': 126 mflag = 1; /* force exact match of names */ 127 break; 128 case 'p': 129 pplan = 1; /* don't show .plan/.project */ 130 break; 131 case 's': 132 sflag = 1; /* short format */ 133 break; 134 case 'h': 135 oflag = 0; /* remote host info */ 136 break; 137 case 'o': 138 oflag = 1; /* office info */ 139 break; 140 case 'g': 141 gflag = 1; /* no gecos info, besides name */ 142 break; 143 case '8': 144 eightflag = 1; /* 8-bit pass-through */ 145 break; 146 case '?': 147 default: 148 (void)fprintf(stderr, 149 "usage: finger [-lmpshog8] [login ...]\n"); 150 exit(1); 151 } 152 argc -= optind; 153 argv += optind; 154 155 (void)time(&now); 156 setpassent(1); 157 entries = getutentries(NULL, &ehead); 158 if (argc == 0) { 159 /* 160 * Assign explicit "small" format if no names given and -l 161 * not selected. Force the -s BEFORE we get names so proper 162 * screening will be done. 163 */ 164 if (!lflag) 165 sflag = 1; /* if -l not explicit, force -s */ 166 loginlist(); 167 if (entries == 0) 168 (void)printf("No one logged on.\n"); 169 } else { 170 userlist(argc, argv); 171 /* 172 * Assign explicit "large" format if names given and -s not 173 * explicitly stated. Force the -l AFTER we get names so any 174 * remote finger attempts specified won't be mishandled. 175 */ 176 if (!sflag) 177 lflag = 1; /* if -s not explicit, force -l */ 178 } 179 if (entries) { 180 if (lflag) 181 lflag_print(); 182 else 183 sflag_print(); 184 } 185 return (0); 186} 187 188static void 189loginlist(void) 190{ 191 PERSON *pn; 192 DBT data, key; 193 struct passwd *pw; 194 int r, seqflag; 195 struct utmpentry *ep; 196 197 for (ep = ehead; ep; ep = ep->next) { 198 if ((pn = find_person(ep->name)) == NULL) { 199 if ((pw = getpwnam(ep->name)) == NULL) 200 continue; 201 pn = enter_person(pw); 202 } 203 enter_where(ep, pn); 204 } 205 if (db && lflag) 206 for (seqflag = R_FIRST;; seqflag = R_NEXT) { 207 PERSON *tmp; 208 209 r = (*db->seq)(db, &key, &data, seqflag); 210 if (r == -1) 211 err(1, "db seq"); 212 if (r == 1) 213 break; 214 memmove(&tmp, data.data, sizeof tmp); 215 enter_lastlog(tmp); 216 } 217} 218 219static void 220userlist(int argc, char **argv) 221{ 222 PERSON *pn; 223 DBT data, key; 224 struct passwd *pw; 225 int r, seqflag, *used, *ip; 226 char **ap, **nargv, **np, **p; 227 struct utmpentry *ep; 228 229 nargv = NULL; 230 if (reallocarr(&nargv, argc + 1, sizeof(char *)) != 0) 231 err(1, NULL); 232 if ((used = calloc(argc, sizeof(int))) == NULL) 233 err(1, NULL); 234 235 /* Pull out all network requests. */ 236 for (ap = p = argv, np = nargv; *p; ++p) 237 if (strchr(*p, '@')) 238 *np++ = *p; 239 else 240 *ap++ = *p; 241 242 *np++ = NULL; 243 *ap++ = NULL; 244 245 if (!*argv) 246 goto net; 247 248 /* 249 * Traverse the list of possible login names and check the login name 250 * and real name against the name specified by the user. 251 */ 252 if (mflag) { 253 for (p = argv; *p; ++p) 254 if ((pw = getpwnam(*p)) != NULL) 255 enter_person(pw); 256 else 257 warnx("%s: no such user", *p); 258 } else { 259 while ((pw = getpwent()) != NULL) 260 for (p = argv, ip = used; *p; ++p, ++ip) 261 if (match(pw, *p)) { 262 enter_person(pw); 263 *ip = 1; 264 } 265 for (p = argv, ip = used; *p; ++p, ++ip) 266 if (!*ip) 267 warnx("%s: no such user", *p); 268 } 269 270 /* Handle network requests. */ 271net: 272 for (p = nargv; *p;) 273 netfinger(*p++); 274 275 if (entries == 0) 276 goto done; 277 278 /* 279 * Scan thru the list of users currently logged in, saving 280 * appropriate data whenever a match occurs. 281 */ 282 for (ep = ehead; ep; ep = ep->next) { 283 if ((pn = find_person(ep->name)) == NULL) 284 continue; 285 enter_where(ep, pn); 286 } 287 if (db != NULL) 288 for (seqflag = R_FIRST;; seqflag = R_NEXT) { 289 PERSON *tmp; 290 291 r = (*db->seq)(db, &key, &data, seqflag); 292 if (r == -1) 293 err(1, "db seq"); 294 if (r == 1) 295 break; 296 memmove(&tmp, data.data, sizeof tmp); 297 enter_lastlog(tmp); 298 } 299done: 300 free(nargv); 301 free(used); 302} 303