src/kits/network/netresolv/irs/getprotobyname_r.c

   1 /*      $NetBSD: getprotobyname_r.c,v 1.3 2005/04/18 19:39:45 kleink Exp $      */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #if defined(LIBC_SCCS) && !defined(lint)
  34 #if 0
  35 static char sccsid[] = "@(#)getprotoname.c      8.1 (Berkeley) 6/4/93";
  36 #else
  37 __RCSID("$NetBSD: getprotobyname_r.c,v 1.3 2005/04/18 19:39:45 kleink Exp $");
  38 #endif
  39 #endif /* LIBC_SCCS and not lint */
  40
  41 #include <assert.h>
  42 #include <netdb.h>
  43 #include <string.h>
  44
  45 #include "protoent.h"
  46
  47 #ifdef __weak_alias
  48 __weak_alias(getprotobyname_r,_getprotobyname_r)
  49 #endif
  50
  51 struct protoent *
  52 getprotobyname_r(const char *name, struct protoent *pr,
  53     struct protoent_data *pd)
  54 {
  55         struct protoent *p;
  56         char **cp;
  57
  58         assert(name != NULL);
  59
  60         setprotoent_r(pd->stayopen, pd);
  61         while ((p = getprotoent_r(pr, pd)) != NULL) {
  62                 if (strcmp(p->p_name, name) == 0)
  63                         break;
  64                 for (cp = p->p_aliases; *cp != NULL; cp++)
  65                         if (strcmp(*cp, name) == 0)
  66                                 goto found;
  67         }
  68 found:
  69         if (!pd->stayopen)
  70                 if (pd->fp != NULL) {
  71                         (void)fclose(pd->fp);
  72                         pd->fp = NULL;
  73                 }
  74         return p;
  75 }