rpc.subproj/getrpcent.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  27  * unrestricted use provided that this legend is included on all tape
  28  * media and as a part of the software program in whole or part.  Users
  29  * may copy or modify Sun RPC without charge, but are not authorized
  30  * to license or distribute it to anyone else except as part of a product or
  31  * program developed by the user or with the express written consent of
  32  * Sun Microsystems, Inc.
  33  *
  34  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  35  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  36  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  37  *
  38  * Sun RPC is provided with no support and without any obligation on the
  39  * part of Sun Microsystems, Inc. to assist in its use, correction,
  40  * modification or enhancement.
  41  *
  42  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  43  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  44  * OR ANY PART THEREOF.
  45  *
  46  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  47  * or profits or other special, indirect and consequential damages, even if
  48  * Sun has been advised of the possibility of such damages.
  49  *
  50  * Sun Microsystems, Inc.
  51  * 2550 Garcia Avenue
  52  * Mountain View, California  94043
  53  */
  54
  55 #if defined(LIBC_SCCS) && !defined(lint)
  56 /*static char *sccsid = "from: @(#)getrpcent.c 1.14 91/03/11 Copyr 1984 Sun Micro";*/
  57 static char *rcsid = "$Id: getrpcent.c,v 1.3 2002/02/19 20:36:23 epeyton Exp $";
  58 #endif
  59
  60 /*
  61  * Copyright (c) 1984 by Sun Microsystems, Inc.
  62  */
  63
  64 #include <stdio.h>
  65 #include <stdlib.h>
  66 #include <sys/types.h>
  67 #include <string.h>
  68 #include <rpc/rpc.h>
  69
  70 /*
  71  * Internet version.
  72  */
  73 struct rpcdata {
  74         FILE    *rpcf;
  75         int     stayopen;
  76 #define MAXALIASES      35
  77         char    *rpc_aliases[MAXALIASES];
  78         struct  rpcent rpc;
  79         char    line[BUFSIZ+1];
  80 } *rpcdata;
  81
  82 static  struct rpcent *interpret();
  83 struct  hostent *gethostent();
  84 char    *inet_ntoa();
  85
  86 static char RPCDB[] = "/etc/rpc";
  87
  88 static struct rpcdata *
  89 _rpcdata()
  90 {
  91         register struct rpcdata *d = rpcdata;
  92
  93         if (d == 0) {
  94                 d = (struct rpcdata *)calloc(1, sizeof (struct rpcdata));
  95                 rpcdata = d;
  96         }
  97         return (d);
  98 }
  99
 100 struct rpcent *
 101 getrpcbynumber(number)
 102         register long number;
 103 {
 104         register struct rpcdata *d = _rpcdata();
 105         register struct rpcent *p;
 106
 107         if (d == 0)
 108                 return (0);
 109         setrpcent(0);
 110         while ((p = getrpcent())) {
 111                 if (p->r_number == number)
 112                         break;
 113         }
 114         endrpcent();
 115         return (p);
 116 }
 117
 118 struct rpcent *
 119 getrpcbyname(name)
 120 #if defined(__APPLE__)
 121         const char *name;
 122 #else
 123         char *name;
 124 #endif
 125 {
 126         struct rpcent *rpc;
 127         char **rp;
 128
 129         setrpcent(0);
 130         while ((rpc = getrpcent())) {
 131                 if (strcmp(rpc->r_name, name) == 0)
 132                         return (rpc);
 133                 for (rp = rpc->r_aliases; *rp != NULL; rp++) {
 134                         if (strcmp(*rp, name) == 0)
 135                                 return (rpc);
 136                 }
 137         }
 138         endrpcent();
 139         return (NULL);
 140 }
 141
 142 void
 143 setrpcent(f)
 144         int f;
 145 {
 146         register struct rpcdata *d = _rpcdata();
 147
 148         if (d == 0)
 149                 return;
 150         if (d->rpcf == NULL)
 151                 d->rpcf = fopen(RPCDB, "r");
 152         else
 153                 rewind(d->rpcf);
 154         d->stayopen |= f;
 155 }
 156
 157 void
 158 endrpcent()
 159 {
 160         register struct rpcdata *d = _rpcdata();
 161
 162         if (d == 0)
 163                 return;
 164         if (d->rpcf && !d->stayopen) {
 165                 fclose(d->rpcf);
 166                 d->rpcf = NULL;
 167         }
 168 }
 169
 170 struct rpcent *
 171 getrpcent()
 172 {
 173         register struct rpcdata *d = _rpcdata();
 174
 175         if (d == 0)
 176                 return(NULL);
 177         if (d->rpcf == NULL && (d->rpcf = fopen(RPCDB, "r")) == NULL)
 178                 return (NULL);
 179         if (fgets(d->line, BUFSIZ, d->rpcf) == NULL)
 180                 return (NULL);
 181         return (interpret(d->line, strlen(d->line)));
 182 }
 183
 184 static struct rpcent *
 185 interpret(val, len)
 186         char *val;
 187         int len;
 188 {
 189         register struct rpcdata *d = _rpcdata();
 190         char *p;
 191         register char *cp, **q;
 192
 193         if (d == 0)
 194                 return (0);
 195         (void) strncpy(d->line, val, len);
 196         p = d->line;
 197         d->line[len] = '\n';
 198         if (*p == '#')
 199                 return (getrpcent());
 200         cp = strpbrk(p, "#\n");
 201         if (cp == NULL)
 202                 return (getrpcent());
 203         *cp = '\0';
 204         cp = strpbrk(p, " \t");
 205         if (cp == NULL)
 206                 return (getrpcent());
 207         *cp++ = '\0';
 208         /* THIS STUFF IS INTERNET SPECIFIC */
 209         d->rpc.r_name = d->line;
 210         while (*cp == ' ' || *cp == '\t')
 211                 cp++;
 212         d->rpc.r_number = atoi(cp);
 213         q = d->rpc.r_aliases = d->rpc_aliases;
 214         cp = strpbrk(cp, " \t");
 215         if (cp != NULL)
 216                 *cp++ = '\0';
 217         while (cp && *cp) {
 218                 if (*cp == ' ' || *cp == '\t') {
 219                         cp++;
 220                         continue;
 221                 }
 222                 if (q < &(d->rpc_aliases[MAXALIASES - 1]))
 223                         *q++ = cp;
 224                 cp = strpbrk(cp, " \t");
 225                 if (cp != NULL)
 226                         *cp++ = '\0';
 227         }
 228         *q = NULL;
 229         return (&d->rpc);
 230 }
 231