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) 32static char sccsid[] = "@(#)netname.c 1.8 91/03/11 Copyr 1986 Sun Micro"; 33#endif 34#include <sys/cdefs.h> 35__FBSDID("$FreeBSD$"); 36 37/* 38 * netname utility routines 39 * convert from unix names to network names and vice-versa 40 * This module is operating system dependent! 41 * What we define here will work with any unix system that has adopted 42 * the sun NIS domain architecture. 43 */ 44 45#include "namespace.h" 46#include <sys/param.h> 47#include <rpc/rpc.h> 48#include <rpc/rpc_com.h> 49#ifdef YP 50#include <rpcsvc/yp_prot.h> 51#include <rpcsvc/ypclnt.h> 52#endif 53#include <ctype.h> 54#include <limits.h> 55#include <stdio.h> 56#include <stdlib.h> 57#include <string.h> 58#include <unistd.h> 59#include "un-namespace.h" 60 61#ifndef MAXHOSTNAMELEN 62#define MAXHOSTNAMELEN 256 63#endif 64 65#define TYPE_BIT(type) (sizeof (type) * CHAR_BIT) 66 67#define TYPE_SIGNED(type) (((type) -1) < 0) 68 69/* 70** 302 / 1000 is log10(2.0) rounded up. 71** Subtract one for the sign bit if the type is signed; 72** add one for integer division truncation; 73** add one more for a minus sign if the type is signed. 74*/ 75#define INT_STRLEN_MAXIMUM(type) \ 76 ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type)) 77 78static char *OPSYS = "unix"; 79 80/* 81 * Figure out my fully qualified network name 82 */ 83int 84getnetname(name) 85 char name[MAXNETNAMELEN+1]; 86{ 87 uid_t uid; 88 89 uid = geteuid(); 90 if (uid == 0) { 91 return (host2netname(name, (char *) NULL, (char *) NULL)); 92 } else { 93 return (user2netname(name, uid, (char *) NULL)); 94 } 95} 96 97 98/* 99 * Convert unix cred to network-name 100 */ 101int 102user2netname(netname, uid, domain) 103 char netname[MAXNETNAMELEN + 1]; 104 const uid_t uid; 105 const char *domain; 106{ 107 char *dfltdom; 108 109 if (domain == NULL) { 110 if (__rpc_get_default_domain(&dfltdom) != 0) { 111 return (0); 112 } 113 domain = dfltdom; 114 } 115 if (strlen(domain) + 1 + INT_STRLEN_MAXIMUM(u_long) + 1 + strlen(OPSYS) > MAXNETNAMELEN) { 116 return (0); 117 } 118 (void) sprintf(netname, "%s.%ld@%s", OPSYS, (u_long)uid, domain); 119 return (1); 120} 121 122 123/* 124 * Convert host to network-name 125 */ 126int 127host2netname(netname, host, domain) 128 char netname[MAXNETNAMELEN + 1]; 129 const char *host; 130 const char *domain; 131{ 132 char *dfltdom; 133 char hostname[MAXHOSTNAMELEN+1]; 134 135 if (domain == NULL) { 136 if (__rpc_get_default_domain(&dfltdom) != 0) { 137 return (0); 138 } 139 domain = dfltdom; 140 } 141 if (host == NULL) { 142 (void) gethostname(hostname, sizeof(hostname)); 143 host = hostname; 144 } 145 if (strlen(domain) + 1 + strlen(host) + 1 + strlen(OPSYS) > MAXNETNAMELEN) { 146 return (0); 147 } 148 (void) sprintf(netname, "%s.%s@%s", OPSYS, host, domain); 149 return (1); 150} 151