2.11BSD#431 - /usr/src/ucb/finger/finger.c

   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.
   7:  *
   8:  * Redistribution and use in source and binary forms are permitted
   9:  * provided that the above copyright notice and this paragraph are
  10:  * duplicated in all such forms and that any documentation,
  11:  * advertising materials, and other materials related to such
  12:  * distribution and use acknowledge that the software was developed
  13:  * by the University of California, Berkeley.  The name of the
  14:  * University may not be used to endorse or promote products derived
  15:  * from this software without specific prior written permission.
  16:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  17:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  18:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  19:  */
  20: 
  21: #ifndef lint
  22: char copyright[] =
  23: "@(#) Copyright (c) 1989 The Regents of the University of California.\n\
  24:  All rights reserved.\n";
  25: #endif /* not lint */
  26: 
  27: #ifndef lint
  28: static char sccsid[] = "@(#)finger.c	5.19 (Berkeley) 2/7/90";
  29: #endif /* not lint */
  30: 
  31: /*
  32:  * Finger prints out information about users.  It is not portable since
  33:  * certain fields (e.g. the full user name, office, and phone numbers) are
  34:  * extracted from the gecos field of the passwd file which other UNIXes
  35:  * may not have or may use for other things.
  36:  *
  37:  * There are currently two output formats; the short format is one line
  38:  * per user and displays login name, tty, login time, real name, idle time,
  39:  * and office location/phone number.  The long format gives the same
  40:  * information (in a more legible format) as well as home directory, shell,
  41:  * mail info, and .plan/.project files.
  42:  */
  43: 
  44: #include <sys/param.h>
  45: #include <sys/file.h>
  46: #include <stdio.h>
  47: #include "finger.h"
  48: #include "pathnames.h"
  49: 
  50: time_t now;
  51: int lflag, sflag, mflag, pplan;
  52: char tbuf[1024];
  53: 
  54: main(argc, argv)
  55:     int argc;
  56:     char **argv;
  57: {
  58:     extern int optind;
  59:     int ch;
  60:     time_t time();
  61: 
  62:     while ((ch = getopt(argc, argv, "lmps")) != EOF)
  63:         switch(ch) {
  64:         case 'l':
  65:             lflag = 1;      /* long format */
  66:             break;
  67:         case 'm':
  68:             mflag = 1;      /* force exact match of names */
  69:             break;
  70:         case 'p':
  71:             pplan = 1;      /* don't show .plan/.project */
  72:             break;
  73:         case 's':
  74:             sflag = 1;      /* short format */
  75:             break;
  76:         case '?':
  77:         default:
  78:             (void)fprintf(stderr,
  79:                 "usage: finger [-lmps] [login ...]\n");
  80:             exit(1);
  81:         }
  82:     argc -= optind;
  83:     argv += optind;
  84: 
  85:     (void)time(&now);
  86:     setpassent(1);
  87:     if (!*argv) {
  88:         /*
  89: 		 * Assign explicit "small" format if no names given and -l
  90: 		 * not selected.  Force the -s BEFORE we get names so proper
  91: 		 * screening will be done.
  92: 		 */
  93:         if (!lflag)
  94:             sflag = 1;  /* if -l not explicit, force -s */
  95:         loginlist();
  96:         if (entries == 0)
  97:             (void)printf("No one logged on.\n");
  98:     } else {
  99:         userlist(argc, argv);
 100:         /*
 101: 		 * Assign explicit "large" format if names given and -s not
 102: 		 * explicitly stated.  Force the -l AFTER we get names so any
 103: 		 * remote finger attempts specified won't be mishandled.
 104: 		 */
 105:         if (!sflag)
 106:             lflag = 1;  /* if -s not explicit, force -l */
 107:     }
 108:     if (entries != 0) {
 109:         if (lflag)
 110:             lflag_print();
 111:         else
 112:             sflag_print();
 113:     }
 114:     exit(0);
 115: }
 116: 
 117: loginlist()
 118: {
 119:     register PERSON *pn;
 120:     struct passwd *pw;
 121:     struct utmp user;
 122:     char name[UT_NAMESIZE + 1];
 123: 
 124:     if (!freopen(_PATH_UTMP, "r", stdin)) {
 125:         (void)fprintf(stderr, "finger: can't read %s.\n", _PATH_UTMP);
 126:         exit(2);
 127:     }
 128:     name[UT_NAMESIZE] = NULL;
 129:     while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
 130:         if (!user.ut_name[0])
 131:             continue;
 132:         if ((pn = find_person(user.ut_name)) == NULL) {
 133:             bcopy(user.ut_name, name, UT_NAMESIZE);
 134:             if ((pw = getpwnam(name)) == NULL)
 135:                 continue;
 136:             pn = enter_person(pw);
 137:         }
 138:         enter_where(&user, pn);
 139:     }
 140:     for (pn = phead; lflag && pn != NULL; pn = pn->next)
 141:         enter_lastlog(pn);
 142: }
 143: 
 144: userlist(argc, argv)
 145:     register argc;
 146:     register char **argv;
 147: {
 148:     register i;
 149:     register PERSON *pn;
 150:     PERSON *nethead;
 151:     struct utmp user;
 152:     struct passwd *pw;
 153:     int dolocal, *used;
 154:     char *index();
 155: 
 156:     if (!(used = (int *)calloc((u_int)argc, (u_int)sizeof(int)))) {
 157:         (void)fprintf(stderr, "finger: out of space.\n");
 158:         exit(1);
 159:     }
 160: 
 161:     /* pull out all network requests */
 162:     for (i = 0, dolocal = 0, nethead = NULL; i < argc; i++) {
 163:         if (!index(argv[i], '@')) {
 164:             dolocal = 1;
 165:             continue;
 166:         }
 167:         pn = palloc();
 168:         pn->next = nethead;
 169:         nethead = pn;
 170:         pn->name = argv[i];
 171:         used[i] = -1;
 172:     }
 173: 
 174:     if (!dolocal)
 175:         goto net;
 176: 
 177:     /*
 178: 	 * traverse the list of possible login names and check the login name
 179: 	 * and real name against the name specified by the user.
 180: 	 */
 181:     if (mflag) {
 182:         for (i = 0; i < argc; i++)
 183:             if (used[i] >= 0 && (pw = getpwnam(argv[i]))) {
 184:                 enter_person(pw);
 185:                 used[i] = 1;
 186:             }
 187:     } else while (pw = getpwent())
 188:         for (i = 0; i < argc; i++)
 189:             if (used[i] >= 0 &&
 190:                 (!strcasecmp(pw->pw_name, argv[i]) ||
 191:                 match(pw, argv[i]))) {
 192:                 enter_person(pw);
 193:                 used[i] = 1;
 194:             }
 195: 
 196:     /* list errors */
 197:     for (i = 0; i < argc; i++)
 198:         if (!used[i])
 199:             (void)fprintf(stderr,
 200:                 "finger: %s: no such user.\n", argv[i]);
 201: 
 202:     /* handle network requests */
 203: net:    for (pn = nethead; pn; pn = pn->next) {
 204:         netfinger(pn->name);
 205:         if (pn->next || entries)
 206:             putchar('\n');
 207:     }
 208: 
 209:     if (entries == 0)
 210:         return;
 211: 
 212:     /*
 213: 	 * Scan thru the list of users currently logged in, saving
 214: 	 * appropriate data whenever a match occurs.
 215: 	 */
 216:     if (!freopen(_PATH_UTMP, "r", stdin)) {
 217:         (void)fprintf( stderr, "finger: can't read %s.\n", _PATH_UTMP);
 218:         exit(1);
 219:     }
 220:     while (fread((char *)&user, sizeof(user), 1, stdin) == 1) {
 221:         if (!user.ut_name[0])
 222:             continue;
 223:         if ((pn = find_person(user.ut_name)) == NULL)
 224:             continue;
 225:         enter_where(&user, pn);
 226:     }
 227:     for (pn = phead; pn != NULL; pn = pn->next)
 228:         enter_lastlog(pn);
 229: }

Defined functions

Defined variables