getrpcent.c

Go to the documentation of this file.

/*
 * Copyright (c) 2009, Sun Microsystems, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name of Sun Microsystems, Inc. nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
 
/*
 * Copyright (c) 1984 by Sun Microsystems, Inc.
 */
 
#include <wintirpc.h>
#include <sys/types.h>
 
//#include <netinet/in.h>
//#include <arpa/inet.h>
 
#include <assert.h>
//#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#include <rpc/rpc.h>
#ifdef YP
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#endif
#include <libc_private.h>
 
/*
 * Internet version.
 */
static struct rpcdata {
    FILE    *rpcf;
    int stayopen;
#define MAXALIASES  35
    char    *rpc_aliases[MAXALIASES];
    struct  rpcent rpc;
    char    line[BUFSIZ+1];
#ifdef  YP
    char    *domain;
    char    *current;
    int currentlen;
#endif
} *rpcdata;
 
static  struct rpcent *interpret(char *val, size_t len);
 
#ifdef  YP
static int  __yp_nomap = 0;
#endif  /* YP */
 
#define RPCDB   "/etc/rpc"
 
static struct rpcdata *_rpcdata(void);
 
static struct rpcdata *
_rpcdata()
{
    struct rpcdata *d = rpcdata;
 
    if (d == 0) {
        d = (struct rpcdata *)calloc(1, sizeof (struct rpcdata));
        rpcdata = d;
    }
    return (d);
}
 
#ifdef GQ
struct rpcent *
getrpcbynumber(number)
    int number;
{
#ifdef  YP
    int reason;
    char adrstr[16];
#endif
    struct rpcent *p;
    struct rpcdata *d = _rpcdata();
 
    if (d == 0)
        return (0);
#ifdef  YP
        if (!__yp_nomap && _yp_check(&d->domain)) {
                sprintf(adrstr, "%d", number);
                reason = yp_match(d->domain, "rpc.bynumber", adrstr, strlen(adrstr),
                                  &d->current, &d->currentlen);
                switch(reason) {
                case 0:
                        break;
                case YPERR_MAP:
                        __yp_nomap = 1;
                        goto no_yp;
                        break;
                default:
                        return(0);
                        break;
                }
                d->current[d->currentlen] = '\0';
                p = interpret(d->current, d->currentlen);
                (void) free(d->current);
                return p;
        }
no_yp:
#endif  /* YP */
 
    setrpcent(0);
    while ((p = getrpcent()) != NULL) {
        if (p->r_number == number)
            break;
    }
    endrpcent();
    return (p);
}
 
struct rpcent *
getrpcbyname(name)
    char *name;
{
    struct rpcent *rpc = NULL;
    char **rp;
 
    assert(name != NULL);
 
    setrpcent(0);
    while ((rpc = getrpcent()) != NULL) {
        if (strcmp(rpc->r_name, name) == 0)
            goto done;
        for (rp = rpc->r_aliases; *rp != NULL; rp++) {
            if (strcmp(*rp, name) == 0)
                goto done;
        }
    }
done:
    endrpcent();
    return (rpc);
}
#endif /* GQ */
 
void
setrpcent(f)
    int f;
{
    struct rpcdata *d = _rpcdata();
 
    if (d == 0)
        return;
#ifdef  YP
        if (!__yp_nomap && _yp_check(NULL)) {
                if (d->current)
                        free(d->current);
                d->current = NULL;
                d->currentlen = 0;
                return;
        }
        __yp_nomap = 0;
#endif  /* YP */
    if (d->rpcf == NULL)
        d->rpcf = fopen(RPCDB, "r");
    else
        rewind(d->rpcf);
    d->stayopen |= f;
}
 
void
endrpcent()
{
    struct rpcdata *d = _rpcdata();
 
    if (d == 0)
        return;
#ifdef  YP
        if (!__yp_nomap && _yp_check(NULL)) {
            if (d->current && !d->stayopen)
                        free(d->current);
                d->current = NULL;
                d->currentlen = 0;
                return;
        }
        __yp_nomap = 0;
#endif  /* YP */
    if (d->rpcf && !d->stayopen) {
        fclose(d->rpcf);
        d->rpcf = NULL;
    }
}
 
struct rpcent *
getrpcent()
{
    struct rpcdata *d = _rpcdata();
#ifdef  YP
    struct rpcent *hp;
    int reason;
    char *val = NULL;
    int vallen;
#endif
 
    if (d == 0)
        return(NULL);
#ifdef  YP
        if (!__yp_nomap && _yp_check(&d->domain)) {
                if (d->current == NULL && d->currentlen == 0) {
                        reason = yp_first(d->domain, "rpc.bynumber",
                                          &d->current, &d->currentlen,
                                          &val, &vallen);
                } else {
                        reason = yp_next(d->domain, "rpc.bynumber",
                                         d->current, d->currentlen,
                                         &d->current, &d->currentlen,
                                         &val, &vallen);
                }
                switch(reason) {
                case 0:
                        break;
                case YPERR_MAP:
                        __yp_nomap = 1;
                        goto no_yp;
                        break;
                default:
                        return(0);
                        break;
                }
                val[vallen] = '\0';
                hp = interpret(val, vallen);
                (void) free(val);
                return hp;
        }
no_yp:
#endif  /* YP */
    if (d->rpcf == NULL && (d->rpcf = fopen(RPCDB, "r")) == NULL)
        return (NULL);
    /* -1 so there is room to append a \n below */
        if (fgets(d->line, BUFSIZ - 1, d->rpcf) == NULL)
        return (NULL);
    return (interpret(d->line, strlen(d->line)));
}
 
static struct rpcent *
interpret(val, len)
    char *val;
    size_t len;
{
    struct rpcdata *d = _rpcdata();
    char *p;
    char *cp, **q;
 
    assert(val != NULL);
 
    if (d == 0)
        return (0);
    (void) strncpy(d->line, val, BUFSIZ);
    d->line[BUFSIZ] = '\0';
    p = d->line;
    p[len] = '\n';
    if (*p == '#')
        return (getrpcent());
    cp = strpbrk(p, "#\n");
    if (cp == NULL)
        return (getrpcent());
    *cp = '\0';
    cp = strpbrk(p, " \t");
    if (cp == NULL)
        return (getrpcent());
    *cp++ = '\0';
    /* THIS STUFF IS INTERNET SPECIFIC */
    d->rpc.r_name = d->line;
    while (*cp == ' ' || *cp == '\t')
        cp++;
    d->rpc.r_number = atoi(cp);
    q = d->rpc.r_aliases = d->rpc_aliases;
    cp = strpbrk(cp, " \t");
    if (cp != NULL)
        *cp++ = '\0';
    while (cp && *cp) {
        if (*cp == ' ' || *cp == '\t') {
            cp++;
            continue;
        }
        if (q < &(d->rpc_aliases[MAXALIASES - 1]))
            *q++ = cp;
        cp = strpbrk(cp, " \t");
        if (cp != NULL)
            *cp++ = '\0';
    }
    *q = NULL;
    return (&d->rpc);
}