external/bsd/libpcap/dist/Win32/Src/getservent.c

   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(LIBC_SCCS) && !defined(lint)
  35 static char sccsid[] = "@(#)getservent.c        8.1 (Berkeley) 6/4/93";
  36 #endif /* LIBC_SCCS and not lint */
  37
  38 #include <sys/types.h>
  39 #include <string.h>
  40
  41 #include <stdlib.h>
  42 #include <ctype.h>
  43 #include <net/netdb.h>
  44 #include <stdio.h>
  45 #include <errno.h>
  46 #include <arpa/nameser.h>
  47
  48 #define MAXALIASES      35
  49
  50 static char SERVDB[] = _PATH_SERVICES;
  51 static FILE *servf = NULL;
  52 static char line[BUFSIZ+1];
  53 static struct servent serv;
  54 static char *serv_aliases[MAXALIASES];
  55 int _serv_stayopen;
  56
  57 void
  58 setservent(f)
  59         int f;
  60 {
  61         if (servf == NULL)
  62                 servf = fopen(SERVDB, "r" );
  63         else
  64                 rewind(servf);
  65         _serv_stayopen |= f;
  66 }
  67
  68 void
  69 endservent()
  70 {
  71         if (servf) {
  72                 fclose(servf);
  73                 servf = NULL;
  74         }
  75         _serv_stayopen = 0;
  76 }
  77
  78 struct servent *
  79 getservent()
  80 {
  81         char *p;
  82         register char *cp, **q;
  83
  84         if (servf == NULL && (servf = fopen(SERVDB, "r" )) == NULL)
  85                 return (NULL);
  86 again:
  87         if ((p = fgets(line, BUFSIZ, servf)) == NULL)
  88                 return (NULL);
  89         if (*p == '#')
  90                 goto again;
  91         cp = strpbrk(p, "#\n");
  92         if (cp == NULL)
  93                 goto again;
  94         *cp = '\0';
  95         serv.s_name = p;
  96         p = strpbrk(p, " \t");
  97         if (p == NULL)
  98                 goto again;
  99         *p++ = '\0';
 100         while (*p == ' ' || *p == '\t')
 101                 p++;
 102         cp = strpbrk(p, ",/");
 103         if (cp == NULL)
 104                 goto again;
 105         *cp++ = '\0';
 106         serv.s_port = htons((u_short)atoi(p));
 107         serv.s_proto = cp;
 108         q = serv.s_aliases = serv_aliases;
 109         cp = strpbrk(cp, " \t");
 110         if (cp != NULL)
 111                 *cp++ = '\0';
 112         while (cp && *cp) {
 113                 if (*cp == ' ' || *cp == '\t') {
 114                         cp++;
 115                         continue;
 116                 }
 117                 if (q < &serv_aliases[MAXALIASES - 1])
 118                         *q++ = cp;
 119                 cp = strpbrk(cp, " \t");
 120                 if (cp != NULL)
 121                         *cp++ = '\0';
 122         }
 123         *q = NULL;
 124         return (&serv);
 125 }