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 1.3 2004/10/25 19:38:01 drhodus 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() 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(number) 91 int number; 92 { 93 struct rpcdata *d = _rpcdata(); 94 struct rpcent *p; 95 #ifdef YP 96 int reason; 97 char adrstr[16]; 98 #endif 99 100 if (d == 0) 101 return (0); 102 #ifdef YP 103 if (!__yp_nomap && _yp_check(&d->domain)) { 104 sprintf(adrstr, "%d", number); 105 reason = yp_match(d->domain, "rpc.bynumber", adrstr, strlen(adrstr), 106 &d->current, &d->currentlen); 107 switch(reason) { 108 case 0: 109 break; 110 case YPERR_MAP: 111 __yp_nomap = 1; 112 goto no_yp; 113 break; 114 default: 115 return(0); 116 break; 117 } 118 d->current[d->currentlen] = '\0'; 119 p = interpret(d->current, d->currentlen); 120 (void) free(d->current); 121 return p; 122 } 123 no_yp: 124 #endif /* YP */ 125 setrpcent(0); 126 while ((p = getrpcent())) { 127 if (p->r_number == number) 128 break; 129 } 130 endrpcent(); 131 return (p); 132 } 133 134 struct rpcent * 135 getrpcbyname(name) 136 char *name; 137 { 138 struct rpcent *rpc = NULL; 139 char **rp; 140 141 setrpcent(0); 142 while ((rpc = getrpcent())) { 143 if (strcmp(rpc->r_name, name) == 0) 144 goto done; 145 for (rp = rpc->r_aliases; *rp != NULL; rp++) { 146 if (strcmp(*rp, name) == 0) 147 goto done; 148 } 149 } 150 done: 151 endrpcent(); 152 return (rpc); 153 } 154 155 void 156 setrpcent(f) 157 int f; 158 { 159 struct rpcdata *d = _rpcdata(); 160 161 if (d == 0) 162 return; 163 #ifdef YP 164 if (!__yp_nomap && _yp_check(NULL)) { 165 if (d->current) 166 free(d->current); 167 d->current = NULL; 168 d->currentlen = 0; 169 return; 170 } 171 __yp_nomap = 0; 172 #endif /* YP */ 173 if (d->rpcf == NULL) 174 d->rpcf = fopen(RPCDB, "r"); 175 else 176 rewind(d->rpcf); 177 d->stayopen |= f; 178 } 179 180 void 181 endrpcent() 182 { 183 struct rpcdata *d = _rpcdata(); 184 185 if (d == 0) 186 return; 187 #ifdef YP 188 if (!__yp_nomap && _yp_check(NULL)) { 189 if (d->current && !d->stayopen) 190 free(d->current); 191 d->current = NULL; 192 d->currentlen = 0; 193 return; 194 } 195 __yp_nomap = 0; 196 #endif /* YP */ 197 if (d->rpcf && !d->stayopen) { 198 fclose(d->rpcf); 199 d->rpcf = NULL; 200 } 201 } 202 203 struct rpcent * 204 getrpcent() 205 { 206 struct rpcdata *d = _rpcdata(); 207 #ifdef YP 208 struct rpcent *hp; 209 int reason; 210 char *val = NULL; 211 int vallen; 212 #endif 213 214 if (d == 0) 215 return(NULL); 216 #ifdef YP 217 if (!__yp_nomap && _yp_check(&d->domain)) { 218 if (d->current == NULL && d->currentlen == 0) { 219 reason = yp_first(d->domain, "rpc.bynumber", 220 &d->current, &d->currentlen, 221 &val, &vallen); 222 } else { 223 reason = yp_next(d->domain, "rpc.bynumber", 224 d->current, d->currentlen, 225 &d->current, &d->currentlen, 226 &val, &vallen); 227 } 228 switch(reason) { 229 case 0: 230 break; 231 case YPERR_MAP: 232 __yp_nomap = 1; 233 goto no_yp; 234 break; 235 default: 236 return(0); 237 break; 238 } 239 val[vallen] = '\0'; 240 hp = interpret(val, vallen); 241 (void) free(val); 242 return hp; 243 } 244 no_yp: 245 #endif /* YP */ 246 if (d->rpcf == NULL && (d->rpcf = fopen(RPCDB, "r")) == NULL) 247 return (NULL); 248 /* -1 so there is room to append a \n below */ 249 if (fgets(d->line, BUFSIZ - 1, d->rpcf) == NULL) 250 return (NULL); 251 return (interpret(d->line, strlen(d->line))); 252 } 253 254 static struct rpcent * 255 interpret(val, len) 256 char *val; 257 int len; 258 { 259 struct rpcdata *d = _rpcdata(); 260 char *p; 261 char *cp, **q; 262 263 if (d == 0) 264 return (0); 265 (void) strncpy(d->line, val, BUFSIZ); 266 d->line[BUFSIZ] = '\0'; 267 p = d->line; 268 p[len] = '\n'; 269 if (*p == '#') 270 return (getrpcent()); 271 cp = strpbrk(p, "#\n"); 272 if (cp == NULL) 273 return (getrpcent()); 274 *cp = '\0'; 275 cp = strpbrk(p, " \t"); 276 if (cp == NULL) 277 return (getrpcent()); 278 *cp++ = '\0'; 279 /* THIS STUFF IS INTERNET SPECIFIC */ 280 d->rpc.r_name = d->line; 281 while (*cp == ' ' || *cp == '\t') 282 cp++; 283 d->rpc.r_number = atoi(cp); 284 q = d->rpc.r_aliases = d->rpc_aliases; 285 cp = strpbrk(cp, " \t"); 286 if (cp != NULL) 287 *cp++ = '\0'; 288 while (cp && *cp) { 289 if (*cp == ' ' || *cp == '\t') { 290 cp++; 291 continue; 292 } 293 if (q < &(d->rpc_aliases[MAXALIASES - 1])) 294 *q++ = cp; 295 cp = strpbrk(cp, " \t"); 296 if (cp != NULL) 297 *cp++ = '\0'; 298 } 299 *q = NULL; 300 return (&d->rpc); 301 } 302 303