lib/libc/rpc/getrpcent.c

   1 /*
   2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   3  * unrestricted use provided that this legend is included on all tape
   4  * media and as a part of the software program in whole or part.  Users
   5  * may copy or modify Sun RPC without charge, but are not authorized
   6  * to license or distribute it to anyone else except as part of a product or
   7  * program developed by the user or with the express written consent of
   8  * Sun Microsystems, Inc.
   9  *
  10  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  11  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  12  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  13  *
  14  * Sun RPC is provided with no support and without any obligation on the
  15  * part of Sun Microsystems, Inc. to assist in its use, correction,
  16  * modification or enhancement.
  17  *
  18  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  19  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  20  * OR ANY PART THEREOF.
  21  *
  22  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  23  * or profits or other special, indirect and consequential damages, even if
  24  * Sun has been advised of the possibility of such damages.
  25  *
  26  * Sun Microsystems, Inc.
  27  * 2550 Garcia Avenue
  28  * Mountain View, California  94043
  29  *
  30  * @(#)getrpcent.c 1.14 91/03/11 Copyr 1984 Sun Micro
  31  * $FreeBSD: src/lib/libc/rpc/getrpcent.c,v 1.10 1999/08/28 00:00:39 peter Exp $
  32  * $DragonFly: src/lib/libc/rpc/getrpcent.c,v 1.4 2005/11/13 12:27:04 swildner Exp $
  33  */
  34
  35 /*
  36  * Copyright (c) 1984 by Sun Microsystems, Inc.
  37  */
  38
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <sys/types.h>
  42 #include <string.h>
  43 #include <rpc/rpc.h>
  44 #ifdef YP
  45 #include <rpcsvc/yp_prot.h>
  46 #include <rpcsvc/ypclnt.h>
  47 #endif
  48
  49 /*
  50  * Internet version.
  51  */
  52 struct rpcdata {
  53         FILE    *rpcf;
  54         int     stayopen;
  55 #define MAXALIASES      35
  56         char    *rpc_aliases[MAXALIASES];
  57         struct  rpcent rpc;
  58         char    line[BUFSIZ+1];
  59 #ifdef  YP
  60         char    *domain;
  61         char    *current;
  62         int     currentlen;
  63 #endif
  64 } *rpcdata;
  65
  66 #ifdef  YP
  67 static int      __yp_nomap = 0;
  68 extern int _yp_check(char **);
  69 #endif  /* YP */
  70
  71 static  struct rpcent *interpret();
  72 struct  hostent *gethostent();
  73 char    *inet_ntoa();
  74
  75 static char RPCDB[] = "/etc/rpc";
  76
  77 static struct rpcdata *
  78 _rpcdata(void)
  79 {
  80         struct rpcdata *d = rpcdata;
  81
  82         if (d == 0) {
  83                 d = (struct rpcdata *)calloc(1, sizeof (struct rpcdata));
  84                 rpcdata = d;
  85         }
  86         return (d);
  87 }
  88
  89 struct rpcent *
  90 getrpcbynumber(int number)
  91 {
  92         struct rpcdata *d = _rpcdata();
  93         struct rpcent *p;
  94 #ifdef  YP
  95         int reason;
  96         char adrstr[16];
  97 #endif
  98
  99         if (d == 0)
 100                 return (0);
 101 #ifdef  YP
 102         if (!__yp_nomap && _yp_check(&d->domain)) {
 103                 sprintf(adrstr, "%d", number);
 104                 reason = yp_match(d->domain, "rpc.bynumber", adrstr, strlen(adrstr),
 105                                   &d->current, &d->currentlen);
 106                 switch(reason) {
 107                 case 0:
 108                         break;
 109                 case YPERR_MAP:
 110                         __yp_nomap = 1;
 111                         goto no_yp;
 112                         break;
 113                 default:
 114                         return(0);
 115                         break;
 116                 }
 117                 d->current[d->currentlen] = '\0';
 118                 p = interpret(d->current, d->currentlen);
 119                 free(d->current);
 120                 return p;
 121         }
 122 no_yp:
 123 #endif  /* YP */
 124         setrpcent(0);
 125         while ((p = getrpcent())) {
 126                 if (p->r_number == number)
 127                         break;
 128         }
 129         endrpcent();
 130         return (p);
 131 }
 132
 133 struct rpcent *
 134 getrpcbyname(char *name)
 135 {
 136         struct rpcent *rpc = NULL;
 137         char **rp;
 138
 139         setrpcent(0);
 140         while ((rpc = getrpcent())) {
 141                 if (strcmp(rpc->r_name, name) == 0)
 142                         goto done;
 143                 for (rp = rpc->r_aliases; *rp != NULL; rp++) {
 144                         if (strcmp(*rp, name) == 0)
 145                                 goto done;
 146                 }
 147         }
 148 done:
 149         endrpcent();
 150         return (rpc);
 151 }
 152
 153 void
 154 setrpcent(int f)
 155 {
 156         struct rpcdata *d = _rpcdata();
 157
 158         if (d == 0)
 159                 return;
 160 #ifdef  YP
 161         if (!__yp_nomap && _yp_check(NULL)) {
 162                 if (d->current)
 163                         free(d->current);
 164                 d->current = NULL;
 165                 d->currentlen = 0;
 166                 return;
 167         }
 168         __yp_nomap = 0;
 169 #endif  /* YP */
 170         if (d->rpcf == NULL)
 171                 d->rpcf = fopen(RPCDB, "r");
 172         else
 173                 rewind(d->rpcf);
 174         d->stayopen |= f;
 175 }
 176
 177 void
 178 endrpcent(void)
 179 {
 180         struct rpcdata *d = _rpcdata();
 181
 182         if (d == 0)
 183                 return;
 184 #ifdef  YP
 185         if (!__yp_nomap && _yp_check(NULL)) {
 186                 if (d->current && !d->stayopen)
 187                         free(d->current);
 188                 d->current = NULL;
 189                 d->currentlen = 0;
 190                 return;
 191         }
 192         __yp_nomap = 0;
 193 #endif  /* YP */
 194         if (d->rpcf && !d->stayopen) {
 195                 fclose(d->rpcf);
 196                 d->rpcf = NULL;
 197         }
 198 }
 199
 200 struct rpcent *
 201 getrpcent(void)
 202 {
 203         struct rpcdata *d = _rpcdata();
 204 #ifdef  YP
 205         struct rpcent *hp;
 206         int reason;
 207         char *val = NULL;
 208         int vallen;
 209 #endif
 210
 211         if (d == 0)
 212                 return(NULL);
 213 #ifdef  YP
 214         if (!__yp_nomap && _yp_check(&d->domain)) {
 215                 if (d->current == NULL && d->currentlen == 0) {
 216                         reason = yp_first(d->domain, "rpc.bynumber",
 217                                           &d->current, &d->currentlen,
 218                                           &val, &vallen);
 219                 } else {
 220                         reason = yp_next(d->domain, "rpc.bynumber",
 221                                          d->current, d->currentlen,
 222                                          &d->current, &d->currentlen,
 223                                          &val, &vallen);
 224                 }
 225                 switch(reason) {
 226                 case 0:
 227                         break;
 228                 case YPERR_MAP:
 229                         __yp_nomap = 1;
 230                         goto no_yp;
 231                         break;
 232                 default:
 233                         return(0);
 234                         break;
 235                 }
 236                 val[vallen] = '\0';
 237                 hp = interpret(val, vallen);
 238                 free(val);
 239                 return hp;
 240         }
 241 no_yp:
 242 #endif  /* YP */
 243         if (d->rpcf == NULL && (d->rpcf = fopen(RPCDB, "r")) == NULL)
 244                 return (NULL);
 245         /* -1 so there is room to append a \n below */
 246         if (fgets(d->line, BUFSIZ - 1, d->rpcf) == NULL)
 247                 return (NULL);
 248         return (interpret(d->line, strlen(d->line)));
 249 }
 250
 251 static struct rpcent *
 252 interpret(char *val, int len)
 253 {
 254         struct rpcdata *d = _rpcdata();
 255         char *p;
 256         char *cp, **q;
 257
 258         if (d == 0)
 259                 return (0);
 260         strncpy(d->line, val, BUFSIZ);
 261         d->line[BUFSIZ] = '\0';
 262         p = d->line;
 263         p[len] = '\n';
 264         if (*p == '#')
 265                 return (getrpcent());
 266         cp = strpbrk(p, "#\n");
 267         if (cp == NULL)
 268                 return (getrpcent());
 269         *cp = '\0';
 270         cp = strpbrk(p, " \t");
 271         if (cp == NULL)
 272                 return (getrpcent());
 273         *cp++ = '\0';
 274         /* THIS STUFF IS INTERNET SPECIFIC */
 275         d->rpc.r_name = d->line;
 276         while (*cp == ' ' || *cp == '\t')
 277                 cp++;
 278         d->rpc.r_number = atoi(cp);
 279         q = d->rpc.r_aliases = d->rpc_aliases;
 280         cp = strpbrk(cp, " \t");
 281         if (cp != NULL)
 282                 *cp++ = '\0';
 283         while (cp && *cp) {
 284                 if (*cp == ' ' || *cp == '\t') {
 285                         cp++;
 286                         continue;
 287                 }
 288                 if (q < &(d->rpc_aliases[MAXALIASES - 1]))
 289                         *q++ = cp;
 290                 cp = strpbrk(cp, " \t");
 291                 if (cp != NULL)
 292                         *cp++ = '\0';
 293         }
 294         *q = NULL;
 295         return (&d->rpc);
 296 }
 297