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getrpcent.c revision 1.1.2.1 
      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 
     31 #if defined(LIBC_SCCS) && !defined(lint)
     32 /*static char *sccsid = "from: @(#)getrpcent.c 1.14 91/03/11 Copyr 1984 Sun Micro";*/
     33 static char *rcsid = "$Id: getrpcent.c,v 1.1.2.1 1994/09/16 17:40:52 cgd Exp $";
     34 #endif
     35 
     36 /*
     37  * Copyright (c) 1984 by Sun Microsystems, Inc.
     38  */
     39 
     40 #include <stdio.h>
     41 #include <sys/types.h>
     42 #include <string.h>
     43 #include <rpc/rpc.h>
     44 
     45 /*
     46  * Internet version.
     47  */
     48 struct rpcdata {
     49 	FILE	*rpcf;
     50 	int	stayopen;
     51 #define	MAXALIASES	35
     52 	char	*rpc_aliases[MAXALIASES];
     53 	struct	rpcent rpc;
     54 	char	line[BUFSIZ+1];
     55 } *rpcdata;
     56 
     57 static	struct rpcent *interpret();
     58 struct	hostent *gethostent();
     59 char	*inet_ntoa();
     60 
     61 static char RPCDB[] = "/etc/rpc";
     62 
     63 static struct rpcdata *
     64 _rpcdata()
     65 {
     66 	register struct rpcdata *d = rpcdata;
     67 
     68 	if (d == 0) {
     69 		d = (struct rpcdata *)calloc(1, sizeof (struct rpcdata));
     70 		rpcdata = d;
     71 	}
     72 	return (d);
     73 }
     74 
     75 struct rpcent *
     76 getrpcbynumber(number)
     77 	register int number;
     78 {
     79 	register struct rpcdata *d = _rpcdata();
     80 	register struct rpcent *p;
     81 
     82 	if (d == 0)
     83 		return (0);
     84 	setrpcent(0);
     85 	while (p = getrpcent()) {
     86 		if (p->r_number == number)
     87 			break;
     88 	}
     89 	endrpcent();
     90 	return (p);
     91 }
     92 
     93 struct rpcent *
     94 getrpcbyname(name)
     95 	char *name;
     96 {
     97 	struct rpcent *rpc;
     98 	char **rp;
     99 
    100 	setrpcent(0);
    101 	while (rpc = getrpcent()) {
    102 		if (strcmp(rpc->r_name, name) == 0)
    103 			return (rpc);
    104 		for (rp = rpc->r_aliases; *rp != NULL; rp++) {
    105 			if (strcmp(*rp, name) == 0)
    106 				return (rpc);
    107 		}
    108 	}
    109 	endrpcent();
    110 	return (NULL);
    111 }
    112 
    113 void
    114 setrpcent(f)
    115 	int f;
    116 {
    117 	register struct rpcdata *d = _rpcdata();
    118 
    119 	if (d == 0)
    120 		return;
    121 	if (d->rpcf == NULL)
    122 		d->rpcf = fopen(RPCDB, "r");
    123 	else
    124 		rewind(d->rpcf);
    125 	d->stayopen |= f;
    126 }
    127 
    128 void
    129 endrpcent()
    130 {
    131 	register struct rpcdata *d = _rpcdata();
    132 
    133 	if (d == 0)
    134 		return;
    135 	if (d->rpcf && !d->stayopen) {
    136 		fclose(d->rpcf);
    137 		d->rpcf = NULL;
    138 	}
    139 }
    140 
    141 struct rpcent *
    142 getrpcent()
    143 {
    144 	struct rpcent *hp;
    145 	int reason;
    146 	register struct rpcdata *d = _rpcdata();
    147 
    148 	if (d == 0)
    149 		return(NULL);
    150 	if (d->rpcf == NULL && (d->rpcf = fopen(RPCDB, "r")) == NULL)
    151 		return (NULL);
    152         if (fgets(d->line, BUFSIZ, d->rpcf) == NULL)
    153 		return (NULL);
    154 	return (interpret(d->line, strlen(d->line)));
    155 }
    156 
    157 static struct rpcent *
    158 interpret(val, len)
    159 	char *val;
    160 	int len;
    161 {
    162 	register struct rpcdata *d = _rpcdata();
    163 	char *p;
    164 	register char *cp, **q;
    165 
    166 	if (d == 0)
    167 		return (0);
    168 	(void) strncpy(d->line, val, len);
    169 	p = d->line;
    170 	d->line[len] = '\n';
    171 	if (*p == '#')
    172 		return (getrpcent());
    173 	cp = strpbrk(p, "#\n");
    174 	if (cp == NULL)
    175 		return (getrpcent());
    176 	*cp = '\0';
    177 	cp = strpbrk(p, " \t");
    178 	if (cp == NULL)
    179 		return (getrpcent());
    180 	*cp++ = '\0';
    181 	/* THIS STUFF IS INTERNET SPECIFIC */
    182 	d->rpc.r_name = d->line;
    183 	while (*cp == ' ' || *cp == '\t')
    184 		cp++;
    185 	d->rpc.r_number = atoi(cp);
    186 	q = d->rpc.r_aliases = d->rpc_aliases;
    187 	cp = strpbrk(cp, " \t");
    188 	if (cp != NULL)
    189 		*cp++ = '\0';
    190 	while (cp && *cp) {
    191 		if (*cp == ' ' || *cp == '\t') {
    192 			cp++;
    193 			continue;
    194 		}
    195 		if (q < &(d->rpc_aliases[MAXALIASES - 1]))
    196 			*q++ = cp;
    197 		cp = strpbrk(cp, " \t");
    198 		if (cp != NULL)
    199 			*cp++ = '\0';
    200 	}
    201 	*q = NULL;
    202 	return (&d->rpc);
    203 }
    204 
    205