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 * $NetBSD: getrpcent.c,v 1.17 2000/01/22 22:19:17 mycroft Exp $ 32 * $FreeBSD: src/lib/libc/rpc/getrpcent.c,v 1.14 2003/02/27 13:40:01 nectar Exp $ 33 * $DragonFly: src/lib/libc/rpc/getrpcent.c,v 1.4 2005/11/13 12:27:04 swildner Exp $ 34 */ 35 36 /* 37 * Copyright (c) 1984 by Sun Microsystems, Inc. 38 */ 39 40 #include "namespace.h" 41 #include <sys/types.h> 42 43 #include <netinet/in.h> 44 #include <arpa/inet.h> 45 46 #include <assert.h> 47 #include <netdb.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 52 #include <rpc/rpc.h> 53 #ifdef YP 54 #include <rpcsvc/yp_prot.h> 55 #include <rpcsvc/ypclnt.h> 56 #endif 57 #include "un-namespace.h" 58 #include "libc_private.h" 59 60 /* 61 * Internet version. 62 */ 63 static struct rpcdata { 64 FILE *rpcf; 65 int stayopen; 66 #define MAXALIASES 35 67 char *rpc_aliases[MAXALIASES]; 68 struct rpcent rpc; 69 char line[BUFSIZ+1]; 70 #ifdef YP 71 char *domain; 72 char *current; 73 int currentlen; 74 #endif 75 } *rpcdata; 76 77 static struct rpcent *interpret(char *val, size_t len); 78 79 #ifdef YP 80 static int __yp_nomap = 0; 81 #endif /* YP */ 82 83 #define RPCDB "/etc/rpc" 84 85 static struct rpcdata *_rpcdata(void); 86 87 static struct rpcdata * 88 _rpcdata(void) 89 { 90 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(int number) 101 { 102 #ifdef YP 103 int reason; 104 char adrstr[16]; 105 #endif 106 struct rpcent *p; 107 struct rpcdata *d = _rpcdata(); 108 109 if (d == 0) 110 return (0); 111 #ifdef YP 112 if (!__yp_nomap && _yp_check(&d->domain)) { 113 sprintf(adrstr, "%d", number); 114 reason = yp_match(d->domain, "rpc.bynumber", adrstr, strlen(adrstr), 115 &d->current, &d->currentlen); 116 switch(reason) { 117 case 0: 118 break; 119 case YPERR_MAP: 120 __yp_nomap = 1; 121 goto no_yp; 122 break; 123 default: 124 return(0); 125 break; 126 } 127 d->current[d->currentlen] = '\0'; 128 p = interpret(d->current, d->currentlen); 129 free(d->current); 130 return p; 131 } 132 no_yp: 133 #endif /* YP */ 134 135 setrpcent(0); 136 while ((p = getrpcent()) != NULL) { 137 if (p->r_number == number) 138 break; 139 } 140 endrpcent(); 141 return (p); 142 } 143 144 struct rpcent * 145 getrpcbyname(char *name) 146 { 147 struct rpcent *rpc = NULL; 148 char **rp; 149 150 assert(name != NULL); 151 152 setrpcent(0); 153 while ((rpc = getrpcent()) != NULL) { 154 if (strcmp(rpc->r_name, name) == 0) 155 goto done; 156 for (rp = rpc->r_aliases; *rp != NULL; rp++) { 157 if (strcmp(*rp, name) == 0) 158 goto done; 159 } 160 } 161 done: 162 endrpcent(); 163 return (rpc); 164 } 165 166 void 167 setrpcent(int f) 168 { 169 struct rpcdata *d = _rpcdata(); 170 171 if (d == 0) 172 return; 173 #ifdef YP 174 if (!__yp_nomap && _yp_check(NULL)) { 175 if (d->current) 176 free(d->current); 177 d->current = NULL; 178 d->currentlen = 0; 179 return; 180 } 181 __yp_nomap = 0; 182 #endif /* YP */ 183 if (d->rpcf == NULL) 184 d->rpcf = fopen(RPCDB, "r"); 185 else 186 rewind(d->rpcf); 187 d->stayopen |= f; 188 } 189 190 void 191 endrpcent(void) 192 { 193 struct rpcdata *d = _rpcdata(); 194 195 if (d == 0) 196 return; 197 #ifdef YP 198 if (!__yp_nomap && _yp_check(NULL)) { 199 if (d->current && !d->stayopen) 200 free(d->current); 201 d->current = NULL; 202 d->currentlen = 0; 203 return; 204 } 205 __yp_nomap = 0; 206 #endif /* YP */ 207 if (d->rpcf && !d->stayopen) { 208 fclose(d->rpcf); 209 d->rpcf = NULL; 210 } 211 } 212 213 struct rpcent * 214 getrpcent(void) 215 { 216 struct rpcdata *d = _rpcdata(); 217 #ifdef YP 218 struct rpcent *hp; 219 int reason; 220 char *val = NULL; 221 int vallen; 222 #endif 223 224 if (d == 0) 225 return(NULL); 226 #ifdef YP 227 if (!__yp_nomap && _yp_check(&d->domain)) { 228 if (d->current == NULL && d->currentlen == 0) { 229 reason = yp_first(d->domain, "rpc.bynumber", 230 &d->current, &d->currentlen, 231 &val, &vallen); 232 } else { 233 reason = yp_next(d->domain, "rpc.bynumber", 234 d->current, d->currentlen, 235 &d->current, &d->currentlen, 236 &val, &vallen); 237 } 238 switch(reason) { 239 case 0: 240 break; 241 case YPERR_MAP: 242 __yp_nomap = 1; 243 goto no_yp; 244 break; 245 default: 246 return(0); 247 break; 248 } 249 val[vallen] = '\0'; 250 hp = interpret(val, vallen); 251 free(val); 252 return hp; 253 } 254 no_yp: 255 #endif /* YP */ 256 if (d->rpcf == NULL && (d->rpcf = fopen(RPCDB, "r")) == NULL) 257 return (NULL); 258 /* -1 so there is room to append a \n below */ 259 if (fgets(d->line, BUFSIZ - 1, d->rpcf) == NULL) 260 return (NULL); 261 return (interpret(d->line, strlen(d->line))); 262 } 263 264 static struct rpcent * 265 interpret(char *val, size_t len) 266 { 267 struct rpcdata *d = _rpcdata(); 268 char *p; 269 char *cp, **q; 270 271 assert(val != NULL); 272 273 if (d == 0) 274 return (0); 275 strncpy(d->line, val, BUFSIZ); 276 d->line[BUFSIZ] = '\0'; 277 p = d->line; 278 p[len] = '\n'; 279 if (*p == '#') 280 return (getrpcent()); 281 cp = strpbrk(p, "#\n"); 282 if (cp == NULL) 283 return (getrpcent()); 284 *cp = '\0'; 285 cp = strpbrk(p, " \t"); 286 if (cp == NULL) 287 return (getrpcent()); 288 *cp++ = '\0'; 289 /* THIS STUFF IS INTERNET SPECIFIC */ 290 d->rpc.r_name = d->line; 291 while (*cp == ' ' || *cp == '\t') 292 cp++; 293 d->rpc.r_number = atoi(cp); 294 q = d->rpc.r_aliases = d->rpc_aliases; 295 cp = strpbrk(cp, " \t"); 296 if (cp != NULL) 297 *cp++ = '\0'; 298 while (cp && *cp) { 299 if (*cp == ' ' || *cp == '\t') { 300 cp++; 301 continue; 302 } 303 if (q < &(d->rpc_aliases[MAXALIASES - 1])) 304 *q++ = cp; 305 cp = strpbrk(cp, " \t"); 306 if (cp != NULL) 307 *cp++ = '\0'; 308 } 309 *q = NULL; 310 return (&d->rpc); 311 } 312 313