# 2.11BSD#431 - /usr/src/libexec/fingerd/fingerd.c

##### Functions

    err               X
    main              X

##### Macros

    ENTRIES           X

       1: /*
       2:  * Copyright (c) 1983, 1993
       3:  *	The Regents of the University of California.  All rights reserved.
       4:  *
       5:  * Redistribution and use in source and binary forms, with or without
       6:  * modification, are permitted provided that the following conditions
       7:  * are met:
       8:  * 1. Redistributions of source code must retain the above copyright
       9:  *    notice, this list of conditions and the following disclaimer.
      10:  * 2. Redistributions in binary form must reproduce the above copyright
      11:  *    notice, this list of conditions and the following disclaimer in the
      12:  *    documentation and/or other materials provided with the distribution.
      13:  * 3. All advertising materials mentioning features or use of this software
      14:  *    must display the following acknowledgement:
      15:  *	This product includes software developed by the University of
      16:  *	California, Berkeley and its contributors.
      17:  * 4. Neither the name of the University nor the names of its contributors
      18:  *    may be used to endorse or promote products derived from this software
      19:  *    without specific prior written permission.
      20:  *
      21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
      22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
      25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31:  * SUCH DAMAGE.
      32:  */
      33:
      34: #if defined(DOSCCS) & !defined(lint)
      35: static char copyright[] =
      36: "@(#) Copyright (c) 1983, 1993\n\
      37: 	The Regents of the University of California.  All rights reserved.\n";
      38: #endif /* not lint */
      39:
      40: #if defined(DOSCCS) & !defined(lint)
      41: static char sccsid[] = "@(#)fingerd.c	8.1.1 (2.11BSD) 1995/04/01";
      42: #endif /* not lint */
      43:
      44: #include <sys/types.h>
      45: #include <sys/socket.h>
      46: #include <netinet/in.h>
      47: #include <arpa/inet.h>
      48: #include <sys/errno.h>
      49:
      50: #include <syslog.h>
      51: #include <netdb.h>
      52: #include <stdio.h>
      53: #include <strings.h>
      54: #include "pathnames.h"
      55:
      56: extern char *optarg;
      57: extern int optind, opterr, errno;
      58:
      59: int
      60: main(argc, argv)
      61:     int argc;
      62:     char *argv[];
      63: {
      64:     register FILE *fp;
      65:     register int ch;
      66:     register char *lp;
      67:     struct hostent *hp;
      68:     struct sockaddr_in sin;
      69:     int p[2], logging, secure, sval;
      70: #define ENTRIES 50
      71:     char **ap, *av[ENTRIES + 1], **comp, line[1024], *prog;
      72:
      73:     prog = _PATH_FINGER;
      74:     logging = secure = 0;
      75:     openlog("fingerd", LOG_PID | LOG_CONS, LOG_DAEMON);
      76:     opterr = 0;
      77:     while ((ch = getopt(argc, argv, "slp:")) != EOF)
      78:         switch (ch) {
      79:         case 'l':
      80:             logging = 1;
      81:             break;
      82:         case 'p':
      83:             prog = optarg;
      84:             break;
      85:         case 's':
      86:             secure = 1;
      87:             break;
      88:         case '?':
      89:         default:
      90:             err("illegal option -- %c", ch);
      91:         }
      92:
      93:     if (logging) {
      94:         sval = sizeof(sin);
      95:         if (getpeername(0, (struct sockaddr *)&sin, &sval) < 0)
      96:             err("getpeername: %s", strerror(errno));
      97:         if (hp = gethostbyaddr((char *)&sin.sin_addr.s_addr,
      98:             sizeof(sin.sin_addr.s_addr), AF_INET))
      99:             lp = hp->h_name;
     100:         else
     101:             lp = inet_ntoa(sin.sin_addr);
     102:         syslog(LOG_NOTICE, "query from %s", lp);
     103:     }
     104:
     105:     if (!fgets(line, sizeof(line), stdin))
     106:         exit(1);
     107:
     108:     comp = &av[1];
     109:     for (lp = line, ap = &av[2];;) {
     110:         *ap = strtok(lp, " \t\r\n");
     111:         if (!*ap) {
     112:             if (secure && ap == &av[2]) {
     113:                 puts("must provide username\r\n");
     114:                 exit(1);
     115:             }
     116:             break;
     117:         }
     118:         if (secure && strchr(*ap, '@')) {
     119:             puts("fowarding service denied\r\n");
     120:             exit(1);
     121:         }
     122:
     123:         /* RFC742: "/[Ww]" == "-l" */
     124:         if ((*ap)[0] == '/' && ((*ap)[1] == 'W' || (*ap)[1] == 'w')) {
     125:             av[1] = "-l";
     126:             comp = &av[0];
     127:         }
     128:         else if (++ap == av + ENTRIES)
     129:             break;
     130:         lp = NULL;
     131:     }
     132:
     133:     if (lp = strrchr(prog, '/'))
     134:         *comp = ++lp;
     135:     else
     136:         *comp = prog;
     137:     if (pipe(p) < 0)
     138:         err("pipe: %s", strerror(errno));
     139:
     140:     switch(vfork()) {
     141:     case 0:
     142:         (void)close(p[0]);
     143:         if (p[1] != 1) {
     144:             (void)dup2(p[1], 1);
     145:             (void)close(p[1]);
     146:         }
     147:         execv(prog, comp);
     148:         err("execv: %s: %s", prog, strerror(errno));
     149:         _exit(1);
     150:     case -1:
     151:         err("fork: %s", strerror(errno));
     152:     }
     153:     (void)close(p[1]);
     154:     if (!(fp = fdopen(p[0], "r")))
     155:         err("fdopen: %s", strerror(errno));
     156:     while ((ch = getc(fp)) != EOF) {
     157:         if (ch == '\n')
     158:             putchar('\r');
     159:         putchar(ch);
     160:     }
     161:     exit(0);
     162: }
     163:
     164: #if __STDC__
     165: #include <stdarg.h>
     166: #else
     167: #include <varargs.h>
     168: #endif
     169:
     170: void
     171: #if __STDC__
     172: err(const char *fmt, ...)
     173: #else
     174: err(fmt, va_alist)
     175:     char *fmt;
     176:         va_dcl
     177: #endif
     178: {
     179:     va_list ap;
     180: #if __STDC__
     181:     va_start(ap, fmt);
     182: #else
     183:     va_start(ap);
     184: #endif
     185:     (void)vsyslog(LOG_ERR, fmt, ap);
     186:     va_end(ap);
     187:     exit(1);
     188:     /* NOTREACHED */
     189: }

#### Defined functions

err defined in line 170; used 6 times

- in line 90, 96, 138, 148-155(3)

main defined in line 59; never used

#### Defined variables

copyright defined in line 35; never used
sccsid defined in line 41; never used

#### Defined macros

ENTRIES defined in line 70; used 2 times

- in line 71, 128

Last modified: 1995-04-02 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 1475 |