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. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)util.c 8.3 (Berkeley) 4/28/95"; 40 #endif 41 static const char rcsid[] = 42 "$FreeBSD$"; 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/stat.h> 47 #include <ctype.h> 48 #include <db.h> 49 #include <err.h> 50 #include <errno.h> 51 #include <fcntl.h> 52 #include <paths.h> 53 #include <pwd.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 #include <utmp.h> 59 #include "finger.h" 60 61 static void find_idle_and_ttywrite __P((WHERE *)); 62 static void userinfo __P((PERSON *, struct passwd *)); 63 static WHERE *walloc __P((PERSON *)); 64 65 int 66 match(pw, user) 67 struct passwd *pw; 68 char *user; 69 { 70 register char *p, *t; 71 char name[1024]; 72 73 if (!strcasecmp(pw->pw_name, user)) 74 return(1); 75 76 /* 77 * XXX 78 * Why do we skip asterisks!?!? 79 */ 80 (void)strncpy(p = tbuf, pw->pw_gecos, sizeof(tbuf)); 81 tbuf[sizeof(tbuf) - 1] = '\0'; 82 if (*p == '*') 83 ++p; 84 85 /* Ampersands get replaced by the login name. */ 86 if ((p = strtok(p, ",")) == NULL) 87 return(0); 88 89 for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) { 90 if (*t == '&') { 91 (void)strncpy(t, pw->pw_name, 92 sizeof(name) - (t - name)); 93 name[sizeof(name) - 1] = '\0'; 94 while (t < &name[sizeof(name) - 1] && *++t) 95 continue; 96 } else { 97 ++t; 98 } 99 } 100 *t = '\0'; 101 for (t = name; (p = strtok(t, "\t ")) != NULL; t = NULL) 102 if (!strcasecmp(p, user)) 103 return(1); 104 return(0); 105 } 106 107 void 108 enter_lastlog(pn) 109 register PERSON *pn; 110 { 111 register WHERE *w; 112 static int opened, fd; 113 struct lastlog ll; 114 char doit = 0; 115 116 /* some systems may not maintain lastlog, don't report errors. */ 117 if (!opened) { 118 fd = open(_PATH_LASTLOG, O_RDONLY, 0); 119 opened = 1; 120 } 121 if (fd == -1 || 122 lseek(fd, (long)pn->uid * sizeof(ll), SEEK_SET) != 123 (long)pn->uid * sizeof(ll) || 124 read(fd, (char *)&ll, sizeof(ll)) != sizeof(ll)) { 125 /* as if never logged in */ 126 ll.ll_line[0] = ll.ll_host[0] = '\0'; 127 ll.ll_time = 0; 128 } 129 if ((w = pn->whead) == NULL) 130 doit = 1; 131 else if (ll.ll_time != 0) { 132 /* if last login is earlier than some current login */ 133 for (; !doit && w != NULL; w = w->next) 134 if (w->info == LOGGEDIN && w->loginat < ll.ll_time) 135 doit = 1; 136 /* 137 * and if it's not any of the current logins 138 * can't use time comparison because there may be a small 139 * discrepancy since login calls time() twice 140 */ 141 for (w = pn->whead; doit && w != NULL; w = w->next) 142 if (w->info == LOGGEDIN && 143 strncmp(w->tty, ll.ll_line, UT_LINESIZE) == 0) 144 doit = 0; 145 } 146 if (doit) { 147 w = walloc(pn); 148 w->info = LASTLOG; 149 bcopy(ll.ll_line, w->tty, UT_LINESIZE); 150 w->tty[UT_LINESIZE] = 0; 151 bcopy(ll.ll_host, w->host, UT_HOSTSIZE); 152 w->host[UT_HOSTSIZE] = 0; 153 w->loginat = ll.ll_time; 154 } 155 } 156 157 void 158 enter_where(ut, pn) 159 struct utmp *ut; 160 PERSON *pn; 161 { 162 register WHERE *w; 163 164 w = walloc(pn); 165 w->info = LOGGEDIN; 166 bcopy(ut->ut_line, w->tty, UT_LINESIZE); 167 w->tty[UT_LINESIZE] = 0; 168 bcopy(ut->ut_host, w->host, UT_HOSTSIZE); 169 w->host[UT_HOSTSIZE] = 0; 170 w->loginat = (time_t)ut->ut_time; 171 find_idle_and_ttywrite(w); 172 } 173 174 PERSON * 175 enter_person(pw) 176 register struct passwd *pw; 177 { 178 DBT data, key; 179 PERSON *pn; 180 181 if (db == NULL && 182 (db = dbopen(NULL, O_RDWR, 0, DB_BTREE, NULL)) == NULL) 183 err(1, NULL); 184 185 key.data = pw->pw_name; 186 key.size = strlen(pw->pw_name); 187 188 switch ((*db->get)(db, &key, &data, 0)) { 189 case 0: 190 memmove(&pn, data.data, sizeof pn); 191 return (pn); 192 default: 193 case -1: 194 err(1, "db get"); 195 /* NOTREACHED */ 196 case 1: 197 ++entries; 198 pn = palloc(); 199 userinfo(pn, pw); 200 pn->whead = NULL; 201 202 data.size = sizeof(PERSON *); 203 data.data = &pn; 204 if ((*db->put)(db, &key, &data, 0)) 205 err(1, "db put"); 206 return (pn); 207 } 208 } 209 210 PERSON * 211 find_person(name) 212 char *name; 213 { 214 struct passwd *pw; 215 216 register int cnt; 217 DBT data, key; 218 PERSON *p; 219 char buf[UT_NAMESIZE + 1]; 220 221 if (!db) 222 return(NULL); 223 224 if ((pw = getpwnam(name)) && hide(pw)) 225 return(NULL); 226 227 /* Name may be only UT_NAMESIZE long and not NUL terminated. */ 228 for (cnt = 0; cnt < UT_NAMESIZE && *name; ++name, ++cnt) 229 buf[cnt] = *name; 230 buf[cnt] = '\0'; 231 key.data = buf; 232 key.size = cnt; 233 234 if ((*db->get)(db, &key, &data, 0)) 235 return (NULL); 236 memmove(&p, data.data, sizeof p); 237 return (p); 238 } 239 240 PERSON * 241 palloc() 242 { 243 PERSON *p; 244 245 if ((p = malloc((u_int) sizeof(PERSON))) == NULL) 246 err(1, NULL); 247 return(p); 248 } 249 250 static WHERE * 251 walloc(pn) 252 register PERSON *pn; 253 { 254 register WHERE *w; 255 256 if ((w = malloc((u_int) sizeof(WHERE))) == NULL) 257 err(1, NULL); 258 if (pn->whead == NULL) 259 pn->whead = pn->wtail = w; 260 else { 261 pn->wtail->next = w; 262 pn->wtail = w; 263 } 264 w->next = NULL; 265 return(w); 266 } 267 268 char * 269 prphone(num) 270 char *num; 271 { 272 register char *p; 273 int len; 274 static char pbuf[20]; 275 276 /* don't touch anything if the user has their own formatting */ 277 for (p = num; *p; ++p) 278 if (!isdigit(*p)) 279 return(num); 280 len = p - num; 281 p = pbuf; 282 switch(len) { 283 case 11: /* +0-123-456-7890 */ 284 *p++ = '+'; 285 *p++ = *num++; 286 *p++ = '-'; 287 /* FALLTHROUGH */ 288 case 10: /* 012-345-6789 */ 289 *p++ = *num++; 290 *p++ = *num++; 291 *p++ = *num++; 292 *p++ = '-'; 293 /* FALLTHROUGH */ 294 case 7: /* 012-3456 */ 295 *p++ = *num++; 296 *p++ = *num++; 297 *p++ = *num++; 298 break; 299 case 5: /* x0-1234 */ 300 case 4: /* x1234 */ 301 *p++ = 'x'; 302 *p++ = *num++; 303 break; 304 default: 305 return(num); 306 } 307 if (len != 4) { 308 *p++ = '-'; 309 *p++ = *num++; 310 } 311 *p++ = *num++; 312 *p++ = *num++; 313 *p++ = *num++; 314 *p = '\0'; 315 return(pbuf); 316 } 317 318 static void 319 find_idle_and_ttywrite(w) 320 register WHERE *w; 321 { 322 extern time_t now; 323 struct stat sb; 324 time_t touched; 325 326 (void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_DEV, w->tty); 327 if (stat(tbuf, &sb) < 0) { 328 warn("%s", tbuf); 329 return; 330 } 331 touched = sb.st_atime; 332 if (touched < w->loginat) { 333 /* tty untouched since before login */ 334 touched = w->loginat; 335 } 336 w->idletime = now < touched ? 0 : now - touched; 337 338 #define TALKABLE 0220 /* tty is writable if 220 mode */ 339 w->writable = ((sb.st_mode & TALKABLE) == TALKABLE); 340 } 341 342 static void 343 userinfo(pn, pw) 344 register PERSON *pn; 345 register struct passwd *pw; 346 { 347 register char *p, *t; 348 char *bp, name[1024]; 349 struct stat sb; 350 351 pn->realname = pn->office = pn->officephone = pn->homephone = NULL; 352 353 pn->uid = pw->pw_uid; 354 if ((pn->name = strdup(pw->pw_name)) == NULL) 355 err(1, "strdup failed"); 356 if ((pn->dir = strdup(pw->pw_dir)) == NULL) 357 err(1, "strdup failed"); 358 if ((pn->shell = strdup(pw->pw_shell)) == NULL) 359 err(1, "strdup failed"); 360 361 /* why do we skip asterisks!?!? */ 362 (void)strncpy(bp = tbuf, pw->pw_gecos, sizeof(tbuf)); 363 tbuf[sizeof(tbuf) - 1] = '\0'; 364 if (*bp == '*') 365 ++bp; 366 367 /* ampersands get replaced by the login name */ 368 if (!(p = strsep(&bp, ","))) 369 return; 370 for (t = name; t < &name[sizeof(name) - 1] && (*t = *p) != '\0'; ++p) { 371 if (*t == '&') { 372 (void)strncpy(t, pw->pw_name, 373 sizeof(name) - (t - name)); 374 name[sizeof(name) - 1] = '\0'; 375 if (islower(*t)) 376 *t = toupper(*t); 377 while (t < &name[sizeof(name) - 1] && *++t) 378 continue; 379 } else { 380 ++t; 381 } 382 } 383 *t = '\0'; 384 if ((pn->realname = strdup(name)) == NULL) 385 err(1, "strdup failed"); 386 pn->office = ((p = strsep(&bp, ",")) && *p) ? 387 strdup(p) : NULL; 388 pn->officephone = ((p = strsep(&bp, ",")) && *p) ? 389 strdup(p) : NULL; 390 pn->homephone = ((p = strsep(&bp, ",")) && *p) ? 391 strdup(p) : NULL; 392 (void)snprintf(tbuf, sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pw->pw_name); 393 pn->mailrecv = -1; /* -1 == not_valid */ 394 if (stat(tbuf, &sb) < 0) { 395 if (errno != ENOENT) { 396 warn("%s", tbuf); 397 return; 398 } 399 } else if (sb.st_size != 0) { 400 pn->mailrecv = sb.st_mtime; 401 pn->mailread = sb.st_atime; 402 } 403 } 404 405 /* 406 * Is this user hiding from finger? 407 * If ~<user>/.nofinger exists, return 1 (hide), else return 0 (nohide). 408 */ 409 410 int 411 hide(pw) 412 struct passwd *pw; 413 { 414 char buf[MAXPATHLEN]; 415 416 if (!pw->pw_dir) 417 return 0; 418 419 snprintf(buf, sizeof(buf), "%s/.nofinger", pw->pw_dir); 420 421 if (access(buf, F_OK) == 0) 422 return 1; 423 424 return 0; 425 } 426