1 /* $NetBSD: finger.c,v 1.27 2006/05/11 01:20:33 mrg 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\n\ 48 The Regents of the University of California. All rights reserved.\n"); 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 1.27 2006/05/11 01:20:33 mrg 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 int main(int, char **); 103 104 int 105 main(int argc, char **argv) 106 { 107 int ch; 108 109 /* Allow user's locale settings to affect character output. */ 110 setlocale(LC_CTYPE, ""); 111 112 /* 113 * Reset back to the C locale, unless we are using a known 114 * single-byte 8-bit locale. 115 */ 116 if (strncmp(nl_langinfo(CODESET), "ISO8859-", 8)) 117 setlocale(LC_CTYPE, "C"); 118 119 oflag = 1; /* default to old "office" behavior */ 120 121 while ((ch = getopt(argc, argv, "lmpshog8")) != -1) 122 switch(ch) { 123 case 'l': 124 lflag = 1; /* long format */ 125 break; 126 case 'm': 127 mflag = 1; /* force exact match of names */ 128 break; 129 case 'p': 130 pplan = 1; /* don't show .plan/.project */ 131 break; 132 case 's': 133 sflag = 1; /* short format */ 134 break; 135 case 'h': 136 oflag = 0; /* remote host info */ 137 break; 138 case 'o': 139 oflag = 1; /* office info */ 140 break; 141 case 'g': 142 gflag = 1; /* no gecos info, besides name */ 143 break; 144 case '8': 145 eightflag = 1; /* 8-bit pass-through */ 146 break; 147 case '?': 148 default: 149 (void)fprintf(stderr, 150 "usage: finger [-lmpshog8] [login ...]\n"); 151 exit(1); 152 } 153 argc -= optind; 154 argv += optind; 155 156 (void)time(&now); 157 setpassent(1); 158 entries = getutentries(NULL, &ehead); 159 if (argc == 0) { 160 /* 161 * Assign explicit "small" format if no names given and -l 162 * not selected. Force the -s BEFORE we get names so proper 163 * screening will be done. 164 */ 165 if (!lflag) 166 sflag = 1; /* if -l not explicit, force -s */ 167 loginlist(); 168 if (entries == 0) 169 (void)printf("No one logged on.\n"); 170 } else { 171 userlist(argc, argv); 172 /* 173 * Assign explicit "large" format if names given and -s not 174 * explicitly stated. Force the -l AFTER we get names so any 175 * remote finger attempts specified won't be mishandled. 176 */ 177 if (!sflag) 178 lflag = 1; /* if -s not explicit, force -l */ 179 } 180 if (entries) { 181 if (lflag) 182 lflag_print(); 183 else 184 sflag_print(); 185 } 186 return (0); 187 } 188 189 static void 190 loginlist(void) 191 { 192 PERSON *pn; 193 DBT data, key; 194 struct passwd *pw; 195 int r, sflag; 196 struct utmpentry *ep; 197 198 for (ep = ehead; ep; ep = ep->next) { 199 if ((pn = find_person(ep->name)) == NULL) { 200 if ((pw = getpwnam(ep->name)) == NULL) 201 continue; 202 pn = enter_person(pw); 203 } 204 enter_where(ep, pn); 205 } 206 if (db && lflag) 207 for (sflag = R_FIRST;; sflag = R_NEXT) { 208 PERSON *tmp; 209 210 r = (*db->seq)(db, &key, &data, sflag); 211 if (r == -1) 212 err(1, "db seq"); 213 if (r == 1) 214 break; 215 memmove(&tmp, data.data, sizeof tmp); 216 enter_lastlog(tmp); 217 } 218 } 219 220 static void 221 userlist(int argc, char **argv) 222 { 223 PERSON *pn; 224 DBT data, key; 225 struct passwd *pw; 226 int r, sflag, *used, *ip; 227 char **ap, **nargv, **np, **p; 228 struct utmpentry *ep; 229 230 if ((nargv = malloc((argc+1) * sizeof(char *))) == NULL || 231 (used = calloc(argc, sizeof(int))) == NULL) 232 err(1, NULL); 233 234 /* Pull out all network requests. */ 235 for (ap = p = argv, np = nargv; *p; ++p) 236 if (strchr(*p, '@')) 237 *np++ = *p; 238 else 239 *ap++ = *p; 240 241 *np++ = NULL; 242 *ap++ = NULL; 243 244 if (!*argv) 245 goto net; 246 247 /* 248 * Traverse the list of possible login names and check the login name 249 * and real name against the name specified by the user. 250 */ 251 if (mflag) { 252 for (p = argv; *p; ++p) 253 if ((pw = getpwnam(*p)) != NULL) 254 enter_person(pw); 255 else 256 warnx("%s: no such user", *p); 257 } else { 258 while ((pw = getpwent()) != NULL) 259 for (p = argv, ip = used; *p; ++p, ++ip) 260 if (match(pw, *p)) { 261 enter_person(pw); 262 *ip = 1; 263 } 264 for (p = argv, ip = used; *p; ++p, ++ip) 265 if (!*ip) 266 warnx("%s: no such user", *p); 267 } 268 269 /* Handle network requests. */ 270 net: 271 for (p = nargv; *p;) 272 netfinger(*p++); 273 274 if (entries == 0) 275 goto done; 276 277 /* 278 * Scan thru the list of users currently logged in, saving 279 * appropriate data whenever a match occurs. 280 */ 281 for (ep = ehead; ep; ep = ep->next) { 282 if ((pn = find_person(ep->name)) == NULL) 283 continue; 284 enter_where(ep, pn); 285 } 286 if (db != NULL) 287 for (sflag = R_FIRST;; sflag = R_NEXT) { 288 PERSON *tmp; 289 290 r = (*db->seq)(db, &key, &data, sflag); 291 if (r == -1) 292 err(1, "db seq"); 293 if (r == 1) 294 break; 295 memmove(&tmp, data.data, sizeof tmp); 296 enter_lastlog(tmp); 297 } 298 done: 299 free(nargv); 300 free(used); 301 } 302