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/*
* 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.
*/
/*
* 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_com.h"
#ifdef YP
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#endif
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 256
#endif
#ifndef NGROUPS
#define NGROUPS 16
#endif
#define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
#define TYPE_SIGNED(type) (((type) -1) < 0)
/*
** 302 / 1000 is log10(2.0) rounded up.
** Subtract one for the sign bit if the type is signed;
** add one for integer division truncation;
** add one more for a minus sign if the type is signed.
*/
#define INT_STRLEN_MAXIMUM(type) \
((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type))
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];
const uid_t uid;
const char *domain;
{
char *dfltdom;
if (domain == NULL) {
if (__rpc_get_default_domain(&dfltdom) != 0) {
return (0);
}
domain = dfltdom;
}
if (strlen(domain) + 1 + INT_STRLEN_MAXIMUM(u_long) + 1 + strlen(OPSYS) > 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];
const char *host;
const 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) + 1 + strlen(OPSYS) > MAXNETNAMELEN) {
return (0);
}
(void) sprintf(netname, "%s.%s@%s", OPSYS, host, domain);
return (1);
}
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