1 /* $NetBSD: finger.c,v 1.30 2016/09/05 00:40:28 sevan 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 53 static char sccsid[] = "@(#)finger.c 8.5 (Berkeley) 5/4/95"; 54 #else 55 __RCSID("$NetBSD: finger.c,v 1.30 2016/09/05 00:40:28 sevan 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 94 DB *db; 95 time_t now; 96 int entries, gflag, lflag, mflag, oflag, sflag, eightflag, pplan; 97 char tbuf[1024]; 98 struct utmpentry *ehead; 99 100 static void loginlist(void); 101 static void userlist(int, char **); 102 103 int 104 main(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 } 187 188 static void 189 loginlist(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 } 218 219 static void 220 userlist(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 if ((nargv = malloc((argc+1) * sizeof(char *))) == NULL || 230 (used = calloc(argc, sizeof(int))) == NULL) 231 err(1, NULL); 232 233 /* Pull out all network requests. */ 234 for (ap = p = argv, np = nargv; *p; ++p) 235 if (strchr(*p, '@')) 236 *np++ = *p; 237 else 238 *ap++ = *p; 239 240 *np++ = NULL; 241 *ap++ = NULL; 242 243 if (!*argv) 244 goto net; 245 246 /* 247 * Traverse the list of possible login names and check the login name 248 * and real name against the name specified by the user. 249 */ 250 if (mflag) { 251 for (p = argv; *p; ++p) 252 if ((pw = getpwnam(*p)) != NULL) 253 enter_person(pw); 254 else 255 warnx("%s: no such user", *p); 256 } else { 257 while ((pw = getpwent()) != NULL) 258 for (p = argv, ip = used; *p; ++p, ++ip) 259 if (match(pw, *p)) { 260 enter_person(pw); 261 *ip = 1; 262 } 263 for (p = argv, ip = used; *p; ++p, ++ip) 264 if (!*ip) 265 warnx("%s: no such user", *p); 266 } 267 268 /* Handle network requests. */ 269 net: 270 for (p = nargv; *p;) 271 netfinger(*p++); 272 273 if (entries == 0) 274 goto done; 275 276 /* 277 * Scan thru the list of users currently logged in, saving 278 * appropriate data whenever a match occurs. 279 */ 280 for (ep = ehead; ep; ep = ep->next) { 281 if ((pn = find_person(ep->name)) == NULL) 282 continue; 283 enter_where(ep, pn); 284 } 285 if (db != NULL) 286 for (seqflag = R_FIRST;; seqflag = R_NEXT) { 287 PERSON *tmp; 288 289 r = (*db->seq)(db, &key, &data, seqflag); 290 if (r == -1) 291 err(1, "db seq"); 292 if (r == 1) 293 break; 294 memmove(&tmp, data.data, sizeof tmp); 295 enter_lastlog(tmp); 296 } 297 done: 298 free(nargv); 299 free(used); 300 } 301