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/* $OpenBSD: getrpcent.c,v 1.21 2015/09/13 15:36:56 guenther Exp $ */ |
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/* |
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* Copyright (c) 2010, Oracle America, Inc. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* * Neither the name of the "Oracle America, Inc." nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <sys/types.h> |
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#include <string.h> |
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#include <limits.h> |
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#include <rpc/rpc.h> |
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/* |
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* Internet version. |
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*/ |
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static struct rpcdata { |
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FILE *rpcf; |
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int stayopen; |
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#define MAXALIASES 35 |
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char *rpc_aliases[MAXALIASES]; |
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struct rpcent rpc; |
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char line[BUFSIZ+1]; |
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} *rpcdata; |
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static struct rpcent *interpret(char *val, int len); |
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static char RPCDB[] = "/etc/rpc"; |
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static struct rpcdata * |
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_rpcdata(void) |
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{ |
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struct rpcdata *d = rpcdata; |
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if (d == NULL) { |
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d = calloc(1, sizeof (struct rpcdata)); |
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rpcdata = d; |
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} |
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return (d); |
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} |
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struct rpcent * |
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getrpcbynumber(int number) |
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{ |
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struct rpcdata *d = _rpcdata(); |
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struct rpcent *p; |
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if (d == NULL) |
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return (0); |
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setrpcent(0); |
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while ((p = getrpcent())) { |
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if (p->r_number == number) |
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break; |
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} |
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endrpcent(); |
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return (p); |
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} |
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struct rpcent * |
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getrpcbyname(char *name) |
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{ |
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struct rpcent *rpc; |
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char **rp; |
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setrpcent(0); |
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while ((rpc = getrpcent())) { |
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if (strcmp(rpc->r_name, name) == 0) |
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goto done; |
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for (rp = rpc->r_aliases; *rp != NULL; rp++) { |
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if (strcmp(*rp, name) == 0) |
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goto done; |
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} |
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} |
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done: |
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endrpcent(); |
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return (rpc); |
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} |
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void |
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setrpcent(int f) |
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{ |
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struct rpcdata *d = _rpcdata(); |
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if (d == NULL) |
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return; |
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if (d->rpcf == NULL) |
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d->rpcf = fopen(RPCDB, "re"); |
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else |
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rewind(d->rpcf); |
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d->stayopen |= f; |
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} |
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DEF_WEAK(setrpcent); |
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void |
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endrpcent(void) |
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{ |
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struct rpcdata *d = _rpcdata(); |
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if (d == NULL) |
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return; |
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if (d->rpcf && !d->stayopen) { |
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fclose(d->rpcf); |
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d->rpcf = NULL; |
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} |
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} |
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DEF_WEAK(endrpcent); |
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struct rpcent * |
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getrpcent(void) |
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{ |
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struct rpcdata *d = _rpcdata(); |
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if (d == NULL) |
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return(NULL); |
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if (d->rpcf == NULL && (d->rpcf = fopen(RPCDB, "re")) == NULL) |
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return (NULL); |
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/* -1 so there is room to append a \n below */ |
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if (fgets(d->line, sizeof(d->line) - 1, d->rpcf) == NULL) |
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return (NULL); |
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return (interpret(d->line, strlen(d->line))); |
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} |
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DEF_WEAK(getrpcent); |
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static struct rpcent * |
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interpret(char *val, int len) |
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{ |
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const char *errstr; |
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struct rpcdata *d = _rpcdata(); |
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char *p; |
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char *cp, *num, **q; |
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if (d == NULL) |
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return (0); |
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strlcpy(d->line, val, sizeof(d->line)); |
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p = d->line; |
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p[len] = '\n'; |
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if (*p == '#') |
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return (getrpcent()); |
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cp = strpbrk(p, "#\n"); |
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if (cp == NULL) |
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return (getrpcent()); |
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*cp = '\0'; |
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cp = strpbrk(p, " \t"); |
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if (cp == NULL) |
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return (getrpcent()); |
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*cp++ = '\0'; |
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/* THIS STUFF IS INTERNET SPECIFIC */ |
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d->rpc.r_name = d->line; |
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while (*cp == ' ' || *cp == '\t') |
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cp++; |
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num = cp; |
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cp = strpbrk(cp, " \t"); |
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if (cp != NULL) |
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*cp++ = '\0'; |
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d->rpc.r_number = strtonum(num, 0, INT_MAX, &errstr); |
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if (errstr) |
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return (0); |
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q = d->rpc.r_aliases = d->rpc_aliases; |
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while (cp && *cp) { |
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if (*cp == ' ' || *cp == '\t') { |
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cp++; |
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continue; |
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} |
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if (q < &(d->rpc_aliases[MAXALIASES - 1])) |
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*q++ = cp; |
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cp = strpbrk(cp, " \t"); |
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if (cp != NULL) |
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*cp++ = '\0'; |
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} |
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*q = NULL; |
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return (&d->rpc); |
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} |
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