source: rtems/cpukit/librpc/src/rpc/netname.c @ df49c60

/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user or with the express written consent of
 * Sun Microsystems, Inc.
 *
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 *
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 *
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 *
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 *
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)netname.c 1.8 91/03/11 Copyr 1986 Sun Micro";
#endif

/*
 * netname utility routines
 * convert from unix names to network names and vice-versa
 * This module is operating system dependent!
 * What we define here will work with any unix system that has adopted
 * the sun NIS domain architecture.
 */

#include <sys/param.h>
#include <rpc/rpc.h>
#include <rpc/rpc_com.h>
#ifdef YP
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#endif
#include <ctype.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>

#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 256
#endif
#ifndef NGROUPS
#define NGROUPS 16
#endif

static char *OPSYS = "unix";

/*
 * Figure out my fully qualified network name
 */
int
getnetname(name)
        char name[MAXNETNAMELEN+1];
{
        uid_t uid;

        uid = geteuid();
        if (uid == 0) {
                return (host2netname(name, (char *) NULL, (char *) NULL));
        } else {
                return (user2netname(name, uid, (char *) NULL));
        }
}


/*
 * Convert unix cred to network-name
 */
int
user2netname(netname, uid, domain)
        char netname[MAXNETNAMELEN + 1];
        uid_t uid;
        char *domain;
{
        char *dfltdom;

#define MAXIPRINT       (11)    /* max length of printed integer */

        if (domain == NULL) {
                if (_rpc_get_default_domain(&dfltdom) != 0) {
                        return (0);
                }
                domain = dfltdom;
        }
        if (strlen(domain) + 1 + MAXIPRINT > MAXNETNAMELEN) {
                return (0);
        }
        (void) sprintf(netname, "%s.%ld@%s", OPSYS, (u_long)uid, domain);       
        return (1);
}


/*
 * Convert host to network-name
 */
int
host2netname(netname, host, domain)
        char netname[MAXNETNAMELEN + 1];
        char *host;
        char *domain;
{
        char *dfltdom;
        char hostname[MAXHOSTNAMELEN+1];

        if (domain == NULL) {
                if (_rpc_get_default_domain(&dfltdom) != 0) {
                        return (0);
                }
                domain = dfltdom;
        }
        if (host == NULL) {
                (void) gethostname(hostname, sizeof(hostname));
                host = hostname;
        }
        if (strlen(domain) + 1 + strlen(host) > MAXNETNAMELEN) {
                return (0);
        } 
        (void) sprintf(netname, "%s.%s@%s", OPSYS, host, domain);
        return (1);
}