1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * 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 /*static char sccsid[] = "from: @(#)util.c 5.14 (Berkeley) 1/17/91";*/ 39 static char rcsid[] = "$Id: util.c,v 1.6 1995/09/27 01:10:48 jtc Exp $"; 40 #endif /* not lint */ 41 42 #include <sys/param.h> 43 #include <sys/stat.h> 44 #include <sys/file.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <ctype.h> 48 #include <string.h> 49 #include <paths.h> 50 #include <errno.h> 51 #include "finger.h" 52 53 find_idle_and_ttywrite(w) 54 register WHERE *w; 55 { 56 extern time_t now; 57 extern int errno; 58 struct stat sb; 59 char *strerror(); 60 61 (void)sprintf(tbuf, "%s/%s", _PATH_DEV, w->tty); 62 if (stat(tbuf, &sb) < 0) { 63 (void)fprintf(stderr, 64 "finger: %s: %s\n", tbuf, strerror(errno)); 65 return; 66 } 67 w->idletime = now < sb.st_atime ? 0 : now - sb.st_atime; 68 69 #define TALKABLE 0220 /* tty is writable if 220 mode */ 70 w->writable = ((sb.st_mode & TALKABLE) == TALKABLE); 71 } 72 73 userinfo(pn, pw) 74 register PERSON *pn; 75 register struct passwd *pw; 76 { 77 extern time_t now; 78 register char *p, *t; 79 struct stat sb; 80 extern int errno; 81 char *bp, name[1024]; 82 83 pn->realname = pn->office = pn->officephone = pn->homephone = NULL; 84 85 pn->uid = pw->pw_uid; 86 pn->name = strdup(pw->pw_name); 87 pn->dir = strdup(pw->pw_dir); 88 pn->shell = strdup(pw->pw_shell); 89 90 /* why do we skip asterisks!?!? */ 91 (void)strcpy(bp = tbuf, pw->pw_gecos); 92 if (*bp == '*') 93 ++bp; 94 95 /* ampersands get replaced by the login name */ 96 if (!(p = strsep(&bp, ","))) 97 return; 98 for (t = name; *t = *p; ++p) 99 if (*t == '&') { 100 (void)strcpy(t, pw->pw_name); 101 if (islower(*t)) 102 *t = toupper(*t); 103 while (*++t); 104 } 105 else 106 ++t; 107 pn->realname = strdup(name); 108 pn->office = ((p = strsep(&bp, ",")) && *p) ? 109 strdup(p) : NULL; 110 pn->officephone = ((p = strsep(&bp, ",")) && *p) ? 111 strdup(p) : NULL; 112 pn->homephone = ((p = strsep(&bp, ",")) && *p) ? 113 strdup(p) : NULL; 114 (void)sprintf(tbuf, "%s/%s", _PATH_MAILSPOOL, pw->pw_name); 115 pn->mailrecv = -1; /* -1 == not_valid */ 116 if (stat(tbuf, &sb) < 0) { 117 if (errno != ENOENT) { 118 (void)fprintf(stderr, 119 "finger: %s: %s\n", tbuf, strerror(errno)); 120 return; 121 } 122 } else if (sb.st_size != 0) { 123 pn->mailrecv = sb.st_mtime; 124 pn->mailread = sb.st_atime; 125 } 126 } 127 128 match(pw, user) 129 struct passwd *pw; 130 char *user; 131 { 132 register char *p, *t; 133 char name[1024]; 134 135 /* why do we skip asterisks!?!? */ 136 (void)strcpy(p = tbuf, pw->pw_gecos); 137 if (*p == '*') 138 ++p; 139 140 /* ampersands get replaced by the login name */ 141 if (!(p = strtok(p, ","))) 142 return(0); 143 for (t = name; *t = *p; ++p) 144 if (*t == '&') { 145 (void)strcpy(t, pw->pw_name); 146 while (*++t); 147 } 148 else 149 ++t; 150 for (t = name; p = strtok(t, "\t "); t = (char *)NULL) 151 if (!strcasecmp(p, user)) 152 return(1); 153 return(0); 154 } 155 156 enter_lastlog(pn) 157 register PERSON *pn; 158 { 159 register WHERE *w; 160 static int opened, fd; 161 struct lastlog ll; 162 char doit = 0; 163 164 /* some systems may not maintain lastlog, don't report errors. */ 165 if (!opened) { 166 fd = open(_PATH_LASTLOG, O_RDONLY, 0); 167 opened = 1; 168 } 169 if (fd == -1 || 170 lseek(fd, (off_t)(pn->uid * sizeof(ll)), SEEK_SET) != 171 (long)pn->uid * sizeof(ll) || 172 read(fd, (char *)&ll, sizeof(ll)) != sizeof(ll)) { 173 /* as if never logged in */ 174 ll.ll_line[0] = ll.ll_host[0] = NULL; 175 ll.ll_time = 0; 176 } 177 if ((w = pn->whead) == NULL) 178 doit = 1; 179 else if (ll.ll_time != 0) { 180 /* if last login is earlier than some current login */ 181 for (; !doit && w != NULL; w = w->next) 182 if (w->info == LOGGEDIN && w->loginat < ll.ll_time) 183 doit = 1; 184 /* 185 * and if it's not any of the current logins 186 * can't use time comparison because there may be a small 187 * discrepency since login calls time() twice 188 */ 189 for (w = pn->whead; doit && w != NULL; w = w->next) 190 if (w->info == LOGGEDIN && 191 strncmp(w->tty, ll.ll_line, UT_LINESIZE) == 0) 192 doit = 0; 193 } 194 if (doit) { 195 w = walloc(pn); 196 w->info = LASTLOG; 197 bcopy(ll.ll_line, w->tty, UT_LINESIZE); 198 w->tty[UT_LINESIZE] = 0; 199 bcopy(ll.ll_host, w->host, UT_HOSTSIZE); 200 w->host[UT_HOSTSIZE] = 0; 201 w->loginat = ll.ll_time; 202 } 203 } 204 205 enter_where(ut, pn) 206 struct utmp *ut; 207 PERSON *pn; 208 { 209 register WHERE *w = walloc(pn); 210 211 w->info = LOGGEDIN; 212 bcopy(ut->ut_line, w->tty, UT_LINESIZE); 213 w->tty[UT_LINESIZE] = 0; 214 bcopy(ut->ut_host, w->host, UT_HOSTSIZE); 215 w->host[UT_HOSTSIZE] = 0; 216 w->loginat = (time_t)ut->ut_time; 217 find_idle_and_ttywrite(w); 218 } 219 220 PERSON * 221 enter_person(pw) 222 register struct passwd *pw; 223 { 224 register PERSON *pn, **pp; 225 226 for (pp = htab + hash(pw->pw_name); 227 *pp != NULL && strcmp((*pp)->name, pw->pw_name) != 0; 228 pp = &(*pp)->hlink) 229 ; 230 if ((pn = *pp) == NULL) { 231 pn = palloc(); 232 entries++; 233 if (phead == NULL) 234 phead = ptail = pn; 235 else { 236 ptail->next = pn; 237 ptail = pn; 238 } 239 pn->next = NULL; 240 pn->hlink = NULL; 241 *pp = pn; 242 userinfo(pn, pw); 243 pn->whead = NULL; 244 } 245 return(pn); 246 } 247 248 PERSON * 249 find_person(name) 250 char *name; 251 { 252 register PERSON *pn; 253 254 /* name may be only UT_NAMESIZE long and not terminated */ 255 for (pn = htab[hash(name)]; 256 pn != NULL && strncmp(pn->name, name, UT_NAMESIZE) != 0; 257 pn = pn->hlink) 258 ; 259 return(pn); 260 } 261 262 hash(name) 263 register char *name; 264 { 265 register int h, i; 266 267 h = 0; 268 /* name may be only UT_NAMESIZE long and not terminated */ 269 for (i = UT_NAMESIZE; --i >= 0 && *name;) 270 h = ((h << 2 | h >> HBITS - 2) ^ *name++) & HMASK; 271 return(h); 272 } 273 274 PERSON * 275 palloc() 276 { 277 PERSON *p; 278 279 if ((p = (PERSON *)malloc((u_int) sizeof(PERSON))) == NULL) { 280 (void)fprintf(stderr, "finger: out of space.\n"); 281 exit(1); 282 } 283 return(p); 284 } 285 286 WHERE * 287 walloc(pn) 288 register PERSON *pn; 289 { 290 register WHERE *w; 291 292 if ((w = (WHERE *)malloc((u_int) sizeof(WHERE))) == NULL) { 293 (void)fprintf(stderr, "finger: out of space.\n"); 294 exit(1); 295 } 296 if (pn->whead == NULL) 297 pn->whead = pn->wtail = w; 298 else { 299 pn->wtail->next = w; 300 pn->wtail = w; 301 } 302 w->next = NULL; 303 return(w); 304 } 305 306 char * 307 prphone(num) 308 char *num; 309 { 310 register char *p; 311 int len; 312 static char pbuf[15]; 313 314 /* don't touch anything if the user has their own formatting */ 315 for (p = num; *p; ++p) 316 if (!isdigit(*p)) 317 return(num); 318 len = p - num; 319 p = pbuf; 320 switch(len) { 321 case 11: /* +0-123-456-7890 */ 322 *p++ = '+'; 323 *p++ = *num++; 324 *p++ = '-'; 325 /* FALLTHROUGH */ 326 case 10: /* 012-345-6789 */ 327 *p++ = *num++; 328 *p++ = *num++; 329 *p++ = *num++; 330 *p++ = '-'; 331 /* FALLTHROUGH */ 332 case 7: /* 012-3456 */ 333 *p++ = *num++; 334 *p++ = *num++; 335 *p++ = *num++; 336 break; 337 case 5: /* x0-1234 */ 338 case 4: /* x1234 */ 339 *p++ = 'x'; 340 *p++ = *num++; 341 break; 342 default: 343 return(num); 344 } 345 if (len != 4) { 346 *p++ = '-'; 347 *p++ = *num++; 348 } 349 *p++ = *num++; 350 *p++ = *num++; 351 *p++ = *num++; 352 *p = '\0'; 353 return(pbuf); 354 } 355