1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Tony Nardo of the Johns Hopkins University/Applied Physics Lab. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)util.c 8.3 (Berkeley) 4/28/95 33 * $FreeBSD: src/usr.bin/finger/util.c,v 1.8.2.6 2002/07/03 01:14:24 des Exp $ 34 */ 35 36 #include <sys/param.h> 37 #include <sys/socket.h> 38 #include <sys/stat.h> 39 #include <ctype.h> 40 #include <db.h> 41 #include <err.h> 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <paths.h> 45 #include <pwd.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 #include "utmpentry.h" 51 #include <utmpx.h> 52 #include "finger.h" 53 #include "pathnames.h" 54 55 static void find_idle_and_ttywrite(WHERE *); 56 static void userinfo(PERSON *, struct passwd *); 57 static WHERE *walloc(PERSON *); 58 59 int 60 match(struct passwd *pw, char *user) 61 { 62 char *p, *t; 63 char name[1024]; 64 65 if (!strcasecmp(pw->pw_name, user)) 66 return(1); 67 68 /* 69 * XXX 70 * Why do we skip asterisks!?!? 71 */ 72 (void)strncpy(p = tbuf, pw->pw_gecos, sizeof(tbuf)); 73 tbuf[sizeof(tbuf) - 1] = '\0'; 74 if (*p == '*') 75 ++p; 76 77 /* Ampersands get replaced by the login name. */ 78 if ((p = strtok(p, ",")) == NULL) 79 return(0); 80 81 for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) { 82 if (*t == '&') { 83 (void)strncpy(t, pw->pw_name, 84 sizeof(name) - (t - name)); 85 name[sizeof(name) - 1] = '\0'; 86 while (t < &name[sizeof(name) - 1] && *++t) 87 continue; 88 } else { 89 ++t; 90 } 91 } 92 *t = '\0'; 93 for (t = name; (p = strtok(t, "\t ")) != NULL; t = NULL) 94 if (!strcasecmp(p, user)) 95 return(1); 96 return(0); 97 } 98 99 void 100 enter_lastlog(PERSON *pn) 101 { 102 WHERE *w; 103 struct utmpx *ut = NULL; 104 char doit = 0; 105 106 if (setutxdb(UTX_DB_LASTLOGX, NULL) == 0) 107 ut = getutxuser(pn->name); 108 if ((w = pn->whead) == NULL) 109 doit = 1; 110 else if (ut != NULL && ut->ut_type == USER_PROCESS) { 111 /* if last login is earlier than some current login */ 112 for (; !doit && w != NULL; w = w->next) 113 if (w->info == LOGGEDIN && 114 w->loginat < ut->ut_tv.tv_sec) 115 doit = 1; 116 /* 117 * and if it's not any of the current logins 118 * can't use time comparison because there may be a small 119 * discrepancy since login calls time() twice 120 */ 121 for (w = pn->whead; doit && w != NULL; w = w->next) 122 if (w->info == LOGGEDIN && 123 strcmp(w->tty, ut->ut_line) == 0) 124 doit = 0; 125 } 126 if (ut != NULL && doit) { 127 w = walloc(pn); 128 w->info = LASTLOG; 129 strcpy(w->tty, ut->ut_line); 130 strcpy(w->host, ut->ut_host); 131 w->loginat = ut->ut_tv.tv_sec; 132 } 133 endutxent(); 134 } 135 136 void 137 enter_where(struct utmpentry *ep, PERSON *pn) 138 { 139 WHERE *w; 140 141 w = walloc(pn); 142 w->info = LOGGEDIN; 143 w->tty = ep->line; 144 w->host = ep->host; 145 w->loginat = (time_t)ep->tv.tv_sec; 146 find_idle_and_ttywrite(w); 147 } 148 149 PERSON * 150 enter_person(struct passwd *pw) 151 { 152 DBT data, key; 153 PERSON *pn; 154 155 if (db == NULL && 156 (db = dbopen(NULL, O_RDWR, 0, DB_BTREE, NULL)) == NULL) 157 err(1, NULL); 158 159 key.data = pw->pw_name; 160 key.size = strlen(pw->pw_name); 161 162 switch ((*db->get)(db, &key, &data, 0)) { 163 case 0: 164 memmove(&pn, data.data, sizeof pn); 165 return (pn); 166 default: 167 case -1: 168 err(1, "db get"); 169 /* NOTREACHED */ 170 case 1: 171 ++entries; 172 pn = palloc(); 173 userinfo(pn, pw); 174 pn->whead = NULL; 175 176 data.size = sizeof(PERSON *); 177 data.data = &pn; 178 if ((*db->put)(db, &key, &data, 0)) 179 err(1, "db put"); 180 return (pn); 181 } 182 } 183 184 PERSON * 185 find_person(char *name) 186 { 187 struct passwd *pw; 188 189 DBT data, key; 190 PERSON *p; 191 192 if (!db) 193 return(NULL); 194 195 if ((pw = getpwnam(name)) && hide(pw)) 196 return(NULL); 197 198 key.data = name; 199 key.size = strlen(name); 200 201 if ((*db->get)(db, &key, &data, 0)) 202 return (NULL); 203 memmove(&p, data.data, sizeof p); 204 return (p); 205 } 206 207 PERSON * 208 palloc(void) 209 { 210 PERSON *p; 211 212 if ((p = malloc(sizeof(PERSON))) == NULL) 213 err(1, NULL); 214 return(p); 215 } 216 217 static WHERE * 218 walloc(PERSON *pn) 219 { 220 WHERE *w; 221 222 if ((w = malloc(sizeof(WHERE))) == NULL) 223 err(1, NULL); 224 bzero(w, sizeof(WHERE)); 225 if (pn->whead == NULL) { 226 pn->whead = pn->wtail = w; 227 } else { 228 pn->wtail->next = w; 229 pn->wtail = w; 230 } 231 w->next = NULL; 232 return(w); 233 } 234 235 char * 236 prphone(char *num) 237 { 238 char *p; 239 int len; 240 static char pbuf[20]; 241 242 /* don't touch anything if the user has their own formatting */ 243 for (p = num; *p; ++p) 244 if (!isdigit(*p)) 245 return(num); 246 len = p - num; 247 p = pbuf; 248 switch(len) { 249 case 11: /* +0-123-456-7890 */ 250 *p++ = '+'; 251 *p++ = *num++; 252 *p++ = '-'; 253 /* FALLTHROUGH */ 254 case 10: /* 012-345-6789 */ 255 *p++ = *num++; 256 *p++ = *num++; 257 *p++ = *num++; 258 *p++ = '-'; 259 /* FALLTHROUGH */ 260 case 7: /* 012-3456 */ 261 *p++ = *num++; 262 *p++ = *num++; 263 *p++ = *num++; 264 break; 265 case 5: /* x0-1234 */ 266 case 4: /* x1234 */ 267 *p++ = 'x'; 268 *p++ = *num++; 269 break; 270 default: 271 return(num); 272 } 273 if (len != 4) { 274 *p++ = '-'; 275 *p++ = *num++; 276 } 277 *p++ = *num++; 278 *p++ = *num++; 279 *p++ = *num++; 280 *p = '\0'; 281 return(pbuf); 282 } 283 284 static void 285 find_idle_and_ttywrite(WHERE *w) 286 { 287 struct stat sb; 288 time_t touched; 289 290 (void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_DEV, w->tty); 291 if (stat(tbuf, &sb) < 0) { 292 warn("%s", tbuf); 293 return; 294 } 295 touched = sb.st_atime; 296 if (touched < w->loginat) { 297 /* tty untouched since before login */ 298 touched = w->loginat; 299 } 300 w->idletime = now < touched ? 0 : now - touched; 301 302 #define TALKABLE 0220 /* tty is writable if 220 mode */ 303 w->writable = ((sb.st_mode & TALKABLE) == TALKABLE); 304 } 305 306 static void 307 userinfo(PERSON *pn, struct passwd *pw) 308 { 309 char *p, *t; 310 char *bp, name[1024]; 311 struct stat sb; 312 313 pn->realname = pn->office = pn->officephone = pn->homephone = NULL; 314 315 pn->uid = pw->pw_uid; 316 if ((pn->name = strdup(pw->pw_name)) == NULL) 317 err(1, "strdup failed"); 318 if ((pn->dir = strdup(pw->pw_dir)) == NULL) 319 err(1, "strdup failed"); 320 if ((pn->shell = strdup(pw->pw_shell)) == NULL) 321 err(1, "strdup failed"); 322 323 /* why do we skip asterisks!?!? */ 324 (void)strncpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf)); 325 tbuf[sizeof(tbuf) - 1] = '\0'; 326 if (*bp == '*') 327 ++bp; 328 329 /* ampersands get replaced by the login name */ 330 if (!(p = strsep(&bp, ","))) 331 return; 332 for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) { 333 if (*t == '&') { 334 (void)strncpy(t, pw->pw_name, 335 sizeof(name) - (t - name)); 336 name[sizeof(name) - 1] = '\0'; 337 if (islower(*t)) 338 *t = toupper(*t); 339 while (t < &name[sizeof(name) - 1] && *++t) 340 continue; 341 } else { 342 ++t; 343 } 344 } 345 *t = '\0'; 346 if ((pn->realname = strdup(name)) == NULL) 347 err(1, "strdup failed"); 348 pn->office = ((p = strsep(&bp, ",")) && *p) ? 349 strdup(p) : NULL; 350 pn->officephone = ((p = strsep(&bp, ",")) && *p) ? 351 strdup(p) : NULL; 352 pn->homephone = ((p = strsep(&bp, ",")) && *p) ? 353 strdup(p) : NULL; 354 (void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pw->pw_name); 355 pn->mailrecv = -1; /* -1 == not_valid */ 356 if (stat(tbuf, &sb) < 0) { 357 if (errno != ENOENT) { 358 warn("%s", tbuf); 359 return; 360 } 361 } else if (sb.st_size != 0) { 362 pn->mailrecv = sb.st_mtime; 363 pn->mailread = sb.st_atime; 364 } 365 } 366 367 /* 368 * Is this user hiding from finger? 369 * If ~<user>/.nofinger exists, return 1 (hide), else return 0 (nohide). 370 */ 371 372 int 373 hide(struct passwd *pw) 374 { 375 struct stat st; 376 char buf[MAXPATHLEN]; 377 378 if (!pw->pw_dir) 379 return 0; 380 381 snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir, _PATH_NOFINGER); 382 383 if (stat(buf, &st) == 0) 384 return 1; 385 386 return 0; 387 } 388