1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 static char sccsid[] = "@(#)util.c 5.7 (Berkeley) 08/14/89"; 20 #endif /* not lint */ 21 22 #include <sys/param.h> 23 #include <sys/stat.h> 24 #include <sys/file.h> 25 #include <stdio.h> 26 #include <ctype.h> 27 #include <strings.h> 28 #include "finger.h" 29 #include "pathnames.h" 30 31 find_idle_and_ttywrite(w) 32 register WHERE *w; 33 { 34 extern time_t now; 35 extern int errno; 36 struct stat sb; 37 char *strerror(); 38 39 (void)sprintf(tbuf, "%s/%s", _PATH_DEV, w->tty); 40 if (stat(tbuf, &sb) < 0) { 41 (void)fprintf(stderr, 42 "finger: %s: %s\n", tbuf, strerror(errno)); 43 exit(1); 44 } 45 w->idletime = now < sb.st_atime ? 0 : now - sb.st_atime; 46 47 #define TALKABLE 0220 /* tty is writable if 220 mode */ 48 w->writable = ((sb.st_mode & TALKABLE) == TALKABLE); 49 } 50 51 userinfo(pn, pw) 52 register PERSON *pn; 53 register struct passwd *pw; 54 { 55 register char *p, *t; 56 char name[256]; 57 58 pn->realname = pn->office = pn->officephone = pn->homephone = NULL; 59 60 pn->uid = pw->pw_uid; 61 pn->name = strdup(pw->pw_name); 62 pn->dir = strdup(pw->pw_dir); 63 pn->shell = strdup(pw->pw_shell); 64 65 /* why do we skip asterisks!?!? */ 66 (void)strcpy(p = tbuf, pw->pw_gecos); 67 if (*p == '*') 68 ++p; 69 70 /* ampersands get replaced by the login name */ 71 if (!(p = strsep(p, ","))) 72 return; 73 for (t = name; *t = *p; ++p) 74 if (*t == '&') { 75 (void)strcpy(t, pw->pw_name); 76 if (islower(*t)) 77 *t = toupper(*t); 78 while (*++t); 79 } 80 else 81 ++t; 82 pn->realname = strdup(name); 83 pn->office = ((p = strsep((char *)NULL, ",")) && *p) ? 84 strdup(p) : NULL; 85 pn->officephone = ((p = strsep((char *)NULL, ",")) && *p) ? 86 strdup(p) : NULL; 87 pn->homephone = ((p = strsep((char *)NULL, ",")) && *p) ? 88 strdup(p) : NULL; 89 } 90 91 match(pw, user) 92 struct passwd *pw; 93 char *user; 94 { 95 register char *p, *t; 96 char name[256]; 97 98 /* why do we skip asterisks!?!? */ 99 (void)strcpy(p = tbuf, pw->pw_gecos); 100 if (*p == '*') 101 ++p; 102 103 /* ampersands get replaced by the login name */ 104 if (!(p = strtok(p, ","))) 105 return(0); 106 for (t = name; *t = *p; ++p) 107 if (*t == '&') { 108 (void)strcpy(t, pw->pw_name); 109 while (*++t); 110 } 111 else 112 ++t; 113 for (t = name; p = strtok(t, "\t "); t = (char *)NULL) 114 if (!strcasecmp(p, user)) 115 return(1); 116 return(0); 117 } 118 119 enter_lastlog(pn) 120 register PERSON *pn; 121 { 122 register WHERE *w; 123 static int opened, fd; 124 struct lastlog ll; 125 char doit = 0; 126 off_t lseek(); 127 128 /* some systems may not maintain lastlog, don't report errors. */ 129 if (!opened) { 130 fd = open(_PATH_LASTLOG, O_RDONLY, 0); 131 opened = 1; 132 } 133 if (fd == -1 || 134 lseek(fd, (long)pn->uid * sizeof(ll), L_SET) != 135 (long)pn->uid * sizeof(ll) || 136 read(fd, (char *)&ll, sizeof(ll)) != sizeof(ll)) { 137 /* as if never logged in */ 138 ll.ll_line[0] = ll.ll_host[0] = NULL; 139 ll.ll_time = 0; 140 } 141 if ((w = pn->whead) == NULL) 142 doit = 1; 143 else if (ll.ll_time != 0) { 144 /* if last login is earlier than some current login */ 145 for (; !doit && w != NULL; w = w->next) 146 if (w->info == LOGGEDIN && w->loginat < ll.ll_time) 147 doit = 1; 148 /* 149 * and if it's not any of the current logins 150 * can't use time comparison because there may be a small 151 * discrepency since login calls time() twice 152 */ 153 for (w = pn->whead; doit && w != NULL; w = w->next) 154 if (w->info == LOGGEDIN && 155 strncmp(w->tty, ll.ll_line, UT_LINESIZE) == 0) 156 doit = 0; 157 } 158 if (doit) { 159 w = walloc(pn); 160 w->info = LASTLOG; 161 bcopy(ll.ll_line, w->tty, UT_LINESIZE); 162 w->tty[UT_LINESIZE] = 0; 163 bcopy(ll.ll_host, w->host, UT_HOSTSIZE); 164 w->host[UT_HOSTSIZE] = 0; 165 w->loginat = ll.ll_time; 166 } 167 } 168 169 enter_where(ut, pn) 170 struct utmp *ut; 171 PERSON *pn; 172 { 173 register WHERE *w = walloc(pn); 174 175 w->info = LOGGEDIN; 176 bcopy(ut->ut_line, w->tty, UT_LINESIZE); 177 w->tty[UT_LINESIZE] = 0; 178 bcopy(ut->ut_host, w->host, UT_HOSTSIZE); 179 w->host[UT_HOSTSIZE] = 0; 180 w->loginat = (time_t)ut->ut_time; 181 find_idle_and_ttywrite(w); 182 } 183 184 PERSON * 185 enter_person(pw) 186 register struct passwd *pw; 187 { 188 register PERSON *pn, **pp; 189 190 for (pp = htab + hash(pw->pw_name); 191 *pp != NULL && strcmp((*pp)->name, pw->pw_name) != 0; 192 pp = &(*pp)->hlink) 193 ; 194 if ((pn = *pp) == NULL) { 195 pn = palloc(); 196 entries++; 197 if (phead == NULL) 198 phead = ptail = pn; 199 else { 200 ptail->next = pn; 201 ptail = pn; 202 } 203 pn->next = NULL; 204 pn->hlink = NULL; 205 *pp = pn; 206 userinfo(pn, pw); 207 pn->whead = NULL; 208 } 209 return(pn); 210 } 211 212 PERSON * 213 find_person(name) 214 char *name; 215 { 216 register PERSON *pn; 217 218 /* name may be only UT_NAMESIZE long and not terminated */ 219 for (pn = htab[hash(name)]; 220 pn != NULL && strncmp(pn->name, name, UT_NAMESIZE) != 0; 221 pn = pn->hlink) 222 ; 223 return(pn); 224 } 225 226 hash(name) 227 register char *name; 228 { 229 register int h, i; 230 231 h = 0; 232 /* name may be only UT_NAMESIZE long and not terminated */ 233 for (i = UT_NAMESIZE; --i >= 0 && *name;) 234 h = ((h << 2 | h >> HBITS - 2) ^ *name++) & HMASK; 235 return(h); 236 } 237 238 PERSON * 239 palloc() 240 { 241 PERSON *p; 242 243 if ((p = (PERSON *)malloc((u_int) sizeof(PERSON))) == NULL) { 244 (void)fprintf(stderr, "finger: out of space.\n"); 245 exit(1); 246 } 247 return(p); 248 } 249 250 WHERE * 251 walloc(pn) 252 register PERSON *pn; 253 { 254 register WHERE *w; 255 256 if ((w = (WHERE *)malloc((u_int) sizeof(WHERE))) == NULL) { 257 (void)fprintf(stderr, "finger: out of space.\n"); 258 exit(1); 259 } 260 if (pn->whead == NULL) 261 pn->whead = pn->wtail = w; 262 else { 263 pn->wtail->next = w; 264 pn->wtail = w; 265 } 266 w->next = NULL; 267 return(w); 268 } 269 270 char * 271 prphone(num) 272 char *num; 273 { 274 register char *p; 275 int len; 276 static char pbuf[15]; 277 278 /* don't touch anything if the user has their own formatting */ 279 for (p = num; *p; ++p) 280 if (!isdigit(*p)) 281 return(num); 282 len = p - num; 283 p = pbuf; 284 switch(len) { 285 case 11: /* +0-123-456-7890 */ 286 *p++ = '+'; 287 *p++ = *num++; 288 *p++ = '-'; 289 /* FALLTHROUGH */ 290 case 10: /* 012-345-6789 */ 291 *p++ = *num++; 292 *p++ = *num++; 293 *p++ = *num++; 294 *p++ = '-'; 295 /* FALLTHROUGH */ 296 case 7: /* 012-3456 */ 297 *p++ = *num++; 298 *p++ = *num++; 299 *p++ = *num++; 300 break; 301 case 5: /* x0-1234 */ 302 *p++ = 'x'; 303 *p++ = *num++; 304 break; 305 default: 306 return(num); 307 } 308 *p++ = '-'; 309 *p++ = *num++; 310 *p++ = *num++; 311 *p++ = *num++; 312 *p++ = *num++; 313 *p = '\0'; 314 return(pbuf); 315 } 316