1 /* $OpenBSD: finger.c,v 1.18 2009/11/12 15:33:21 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 1989 The Regents of the University of California. 5 * 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 /* 46 * Finger prints out information about users. It is not portable since 47 * certain fields (e.g. the full user name, office, and phone numbers) are 48 * extracted from the gecos field of the passwd file which other UNIXes 49 * may not have or may use for other things. 50 * 51 * There are currently two output formats; the short format is one line 52 * per user and displays login name, tty, login time, real name, idle time, 53 * and either remote host information (default) or office location/phone 54 * number, depending on if -h or -o is used respectively. 55 * The long format gives the same information (in a more legible format) as 56 * well as home directory, shell, mail info, and .plan/.project files. 57 */ 58 59 #include <sys/param.h> 60 #include <sys/file.h> 61 #include <sys/stat.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <time.h> 66 #include <unistd.h> 67 #include <err.h> 68 #include "finger.h" 69 #include "extern.h" 70 71 time_t now; 72 int entries, lflag, sflag, mflag, oflag, pplan, Mflag; 73 char tbuf[1024]; 74 PERSON *htab[HSIZE]; 75 PERSON *phead, *ptail; 76 77 int 78 main(int argc, char *argv[]) 79 { 80 extern int optind; 81 extern char *__progname; 82 int ch; 83 char domain[MAXHOSTNAMELEN]; 84 struct stat sb; 85 86 oflag = 1; /* default to old "office" behavior */ 87 88 while ((ch = getopt(argc, argv, "lmMpsho")) != -1) 89 switch(ch) { 90 case 'l': 91 lflag = 1; /* long format */ 92 break; 93 case 'm': 94 mflag = 1; /* force exact match of names */ 95 break; 96 case 'M': 97 Mflag = 1; /* allow name matching */ 98 break; 99 case 'p': 100 pplan = 1; /* don't show .plan/.project */ 101 break; 102 case 's': 103 sflag = 1; /* short format */ 104 break; 105 case 'h': 106 oflag = 0; /* remote host info */ 107 break; 108 case 'o': 109 oflag = 1; /* office info */ 110 break; 111 case '?': 112 default: 113 (void)fprintf(stderr, 114 "usage: %s [-hlMmops] [login ...]\n", __progname); 115 exit(1); 116 } 117 argc -= optind; 118 argv += optind; 119 120 /* If a domainname is set, increment mflag. */ 121 if ((getdomainname(domain, sizeof(domain)) == 0) && domain[0]) 122 mflag++; 123 /* If _PATH_MP_DB is larger than 1MB, increment mflag. */ 124 if (stat(_PATH_MP_DB, &sb) == 0) { 125 if (sb.st_size > 1048576) 126 mflag++; 127 } 128 129 (void)time(&now); 130 setpassent(1); 131 if (!*argv) { 132 /* 133 * Assign explicit "small" format if no names given and -l 134 * not selected. Force the -s BEFORE we get names so proper 135 * screening will be done. 136 */ 137 if (!lflag) 138 sflag = 1; /* if -l not explicit, force -s */ 139 loginlist(); 140 if (entries == 0) 141 (void)printf("No one logged on.\n"); 142 } else { 143 userlist(argc, argv); 144 /* 145 * Assign explicit "large" format if names given and -s not 146 * explicitly stated. Force the -l AFTER we get names so any 147 * remote finger attempts specified won't be mishandled. 148 */ 149 if (!sflag) 150 lflag = 1; /* if -s not explicit, force -l */ 151 } 152 if (entries != 0) { 153 if (lflag) 154 lflag_print(); 155 else 156 sflag_print(); 157 } 158 exit(0); 159 } 160 161 void 162 loginlist(void) 163 { 164 PERSON *pn; 165 struct passwd *pw; 166 struct utmp user; 167 char name[UT_NAMESIZE + 1]; 168 169 if (!freopen(_PATH_UTMP, "r", stdin)) 170 err(2, _PATH_UTMP); 171 name[UT_NAMESIZE] = '\0'; 172 while (fread((char *)&user, sizeof(user), 1, stdin) == 1) { 173 if (!user.ut_name[0]) 174 continue; 175 if ((pn = find_person(user.ut_name)) == NULL) { 176 bcopy(user.ut_name, name, UT_NAMESIZE); 177 if ((pw = getpwnam(name)) == NULL) 178 continue; 179 pn = enter_person(pw); 180 } 181 enter_where(&user, pn); 182 } 183 for (pn = phead; lflag && pn != NULL; pn = pn->next) 184 enter_lastlog(pn); 185 } 186 187 void 188 userlist(int argc, char **argv) 189 { 190 int i; 191 PERSON *pn; 192 PERSON *nethead, **nettail; 193 struct utmp user; 194 struct passwd *pw; 195 int dolocal, *used; 196 197 if (!(used = (int *)calloc((u_int)argc, (u_int)sizeof(int)))) 198 err(2, "malloc"); 199 200 /* pull out all network requests */ 201 for (i = 0, dolocal = 0, nettail = &nethead; i < argc; i++) { 202 if (!strchr(argv[i], '@')) { 203 dolocal = 1; 204 continue; 205 } 206 pn = palloc(); 207 *nettail = pn; 208 nettail = &pn->next; 209 pn->name = argv[i]; 210 used[i] = -1; 211 } 212 *nettail = NULL; 213 214 if (!dolocal) 215 goto net; 216 217 /* 218 * traverse the list of possible login names and check the login name 219 * and real name against the name specified by the user. 220 */ 221 if ((mflag - Mflag) > 0) { 222 for (i = 0; i < argc; i++) 223 if (used[i] >= 0 && (pw = getpwnam(argv[i]))) { 224 enter_person(pw); 225 used[i] = 1; 226 } 227 } else while ((pw = getpwent()) != NULL) 228 for (i = 0; i < argc; i++) 229 if (used[i] >= 0 && 230 (!strcasecmp(pw->pw_name, argv[i]) || 231 match(pw, argv[i]))) { 232 enter_person(pw); 233 used[i] = 1; 234 } 235 236 /* list errors */ 237 for (i = 0; i < argc; i++) 238 if (!used[i]) 239 warnx("%s: no such user.", argv[i]); 240 241 /* handle network requests */ 242 net: for (pn = nethead; pn; pn = pn->next) { 243 netfinger(pn->name); 244 if (pn->next || entries) 245 putchar('\n'); 246 } 247 248 free(used); 249 if (entries == 0) 250 return; 251 252 /* 253 * Scan thru the list of users currently logged in, saving 254 * appropriate data whenever a match occurs. 255 */ 256 if (!freopen(_PATH_UTMP, "r", stdin)) 257 err(1, _PATH_UTMP); 258 while (fread((char *)&user, sizeof(user), 1, stdin) == 1) { 259 if (!user.ut_name[0]) 260 continue; 261 if ((pn = find_person(user.ut_name)) == NULL) 262 continue; 263 enter_where(&user, pn); 264 } 265 for (pn = phead; pn != NULL; pn = pn->next) 266 enter_lastlog(pn); 267 } 268