rpc.subproj/getrpcent.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.1 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  26  * unrestricted use provided that this legend is included on all tape
  27  * media and as a part of the software program in whole or part.  Users
  28  * may copy or modify Sun RPC without charge, but are not authorized
  29  * to license or distribute it to anyone else except as part of a product or
  30  * program developed by the user or with the express written consent of
  31  * Sun Microsystems, Inc.
  32  *
  33  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  34  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  35  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  36  *
  37  * Sun RPC is provided with no support and without any obligation on the
  38  * part of Sun Microsystems, Inc. to assist in its use, correction,
  39  * modification or enhancement.
  40  *
  41  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  42  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  43  * OR ANY PART THEREOF.
  44  *
  45  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  46  * or profits or other special, indirect and consequential damages, even if
  47  * Sun has been advised of the possibility of such damages.
  48  *
  49  * Sun Microsystems, Inc.
  50  * 2550 Garcia Avenue
  51  * Mountain View, California  94043
  52  */
  53
  54 #if defined(LIBC_SCCS) && !defined(lint)
  55 /*static char *sccsid = "from: @(#)getrpcent.c 1.14 91/03/11 Copyr 1984 Sun Micro";*/
  56 static char *rcsid = "$Id: getrpcent.c,v 1.3 2002/02/19 20:36:23 epeyton Exp $";
  57 #endif
  58
  59 /*
  60  * Copyright (c) 1984 by Sun Microsystems, Inc.
  61  */
  62
  63 #include <stdio.h>
  64 #include <stdlib.h>
  65 #include <sys/types.h>
  66 #include <string.h>
  67 #include <rpc/rpc.h>
  68
  69 /*
  70  * Internet version.
  71  */
  72 struct rpcdata {
  73         FILE    *rpcf;
  74         int     stayopen;
  75 #define MAXALIASES      35
  76         char    *rpc_aliases[MAXALIASES];
  77         struct  rpcent rpc;
  78         char    line[BUFSIZ+1];
  79 } *rpcdata;
  80
  81 static  struct rpcent *interpret();
  82 struct  hostent *gethostent();
  83 char    *inet_ntoa();
  84
  85 static char RPCDB[] = "/etc/rpc";
  86
  87 static struct rpcdata *
  88 _rpcdata()
  89 {
  90         register struct rpcdata *d = rpcdata;
  91
  92         if (d == 0) {
  93                 d = (struct rpcdata *)calloc(1, sizeof (struct rpcdata));
  94                 rpcdata = d;
  95         }
  96         return (d);
  97 }
  98
  99 struct rpcent *
 100 getrpcbynumber(number)
 101         register long number;
 102 {
 103         register struct rpcdata *d = _rpcdata();
 104         register struct rpcent *p;
 105
 106         if (d == 0)
 107                 return (0);
 108         setrpcent(0);
 109         while ((p = getrpcent())) {
 110                 if (p->r_number == number)
 111                         break;
 112         }
 113         endrpcent();
 114         return (p);
 115 }
 116
 117 struct rpcent *
 118 getrpcbyname(name)
 119 #if defined(__APPLE__)
 120         const char *name;
 121 #else
 122         char *name;
 123 #endif
 124 {
 125         struct rpcent *rpc;
 126         char **rp;
 127
 128         setrpcent(0);
 129         while ((rpc = getrpcent())) {
 130                 if (strcmp(rpc->r_name, name) == 0)
 131                         return (rpc);
 132                 for (rp = rpc->r_aliases; *rp != NULL; rp++) {
 133                         if (strcmp(*rp, name) == 0)
 134                                 return (rpc);
 135                 }
 136         }
 137         endrpcent();
 138         return (NULL);
 139 }
 140
 141 void
 142 setrpcent(f)
 143         int f;
 144 {
 145         register struct rpcdata *d = _rpcdata();
 146
 147         if (d == 0)
 148                 return;
 149         if (d->rpcf == NULL)
 150                 d->rpcf = fopen(RPCDB, "r");
 151         else
 152                 rewind(d->rpcf);
 153         d->stayopen |= f;
 154 }
 155
 156 void
 157 endrpcent()
 158 {
 159         register struct rpcdata *d = _rpcdata();
 160
 161         if (d == 0)
 162                 return;
 163         if (d->rpcf && !d->stayopen) {
 164                 fclose(d->rpcf);
 165                 d->rpcf = NULL;
 166         }
 167 }
 168
 169 struct rpcent *
 170 getrpcent()
 171 {
 172         register struct rpcdata *d = _rpcdata();
 173
 174         if (d == 0)
 175                 return(NULL);
 176         if (d->rpcf == NULL && (d->rpcf = fopen(RPCDB, "r")) == NULL)
 177                 return (NULL);
 178         if (fgets(d->line, BUFSIZ, d->rpcf) == NULL)
 179                 return (NULL);
 180         return (interpret(d->line, strlen(d->line)));
 181 }
 182
 183 static struct rpcent *
 184 interpret(val, len)
 185         char *val;
 186         u_int len;
 187 {
 188         register struct rpcdata *d = _rpcdata();
 189         char *p;
 190         register char *cp, **q;
 191
 192         if (d == 0)
 193                 return (0);
 194         (void) strncpy(d->line, val, len);
 195         p = d->line;
 196         d->line[len] = '\n';
 197         if (*p == '#')
 198                 return (getrpcent());
 199         cp = strpbrk(p, "#\n");
 200         if (cp == NULL)
 201                 return (getrpcent());
 202         *cp = '\0';
 203         cp = strpbrk(p, " \t");
 204         if (cp == NULL)
 205                 return (getrpcent());
 206         *cp++ = '\0';
 207         /* THIS STUFF IS INTERNET SPECIFIC */
 208         d->rpc.r_name = d->line;
 209         while (*cp == ' ' || *cp == '\t')
 210                 cp++;
 211         d->rpc.r_number = atoi(cp);
 212         q = d->rpc.r_aliases = d->rpc_aliases;
 213         cp = strpbrk(cp, " \t");
 214         if (cp != NULL)
 215                 *cp++ = '\0';
 216         while (cp && *cp) {
 217                 if (*cp == ' ' || *cp == '\t') {
 218                         cp++;
 219                         continue;
 220                 }
 221                 if (q < &(d->rpc_aliases[MAXALIASES - 1]))
 222                         *q++ = cp;
 223                 cp = strpbrk(cp, " \t");
 224                 if (cp != NULL)
 225                         *cp++ = '\0';
 226         }
 227         *q = NULL;
 228         return (&d->rpc);
 229 }
 230