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 #if !defined(lint) && defined(SCCSIDS) 31 static char sccsid[] = "@(#)netname.c 1.8 91/03/11 Copyr 1986 Sun Micro"; 32 #endif 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 /* 37 * netname utility routines 38 * convert from unix names to network names and vice-versa 39 * This module is operating system dependent! 40 * What we define here will work with any unix system that has adopted 41 * the sun NIS domain architecture. 42 */ 43 44 #include "namespace.h" 45 #include <sys/param.h> 46 #include <rpc/rpc.h> 47 #include <rpc/rpc_com.h> 48 #ifdef YP 49 #include <rpcsvc/yp_prot.h> 50 #include <rpcsvc/ypclnt.h> 51 #endif 52 #include <ctype.h> 53 #include <limits.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 #include "un-namespace.h" 59 60 #ifndef MAXHOSTNAMELEN 61 #define MAXHOSTNAMELEN 256 62 #endif 63 #ifndef NGROUPS 64 #define NGROUPS 16 65 #endif 66 67 #define TYPE_BIT(type) (sizeof (type) * CHAR_BIT) 68 69 #define TYPE_SIGNED(type) (((type) -1) < 0) 70 71 /* 72 ** 302 / 1000 is log10(2.0) rounded up. 73 ** Subtract one for the sign bit if the type is signed; 74 ** add one for integer division truncation; 75 ** add one more for a minus sign if the type is signed. 76 */ 77 #define INT_STRLEN_MAXIMUM(type) \ 78 ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type)) 79 80 static char *OPSYS = "unix"; 81 82 /* 83 * Figure out my fully qualified network name 84 */ 85 int 86 getnetname(name) 87 char name[MAXNETNAMELEN+1]; 88 { 89 uid_t uid; 90 91 uid = geteuid(); 92 if (uid == 0) { 93 return (host2netname(name, (char *) NULL, (char *) NULL)); 94 } else { 95 return (user2netname(name, uid, (char *) NULL)); 96 } 97 } 98 99 100 /* 101 * Convert unix cred to network-name 102 */ 103 int 104 user2netname(netname, uid, domain) 105 char netname[MAXNETNAMELEN + 1]; 106 const uid_t uid; 107 const char *domain; 108 { 109 char *dfltdom; 110 111 if (domain == NULL) { 112 if (__rpc_get_default_domain(&dfltdom) != 0) { 113 return (0); 114 } 115 domain = dfltdom; 116 } 117 if (strlen(domain) + 1 + INT_STRLEN_MAXIMUM(u_long) + 1 + strlen(OPSYS) > MAXNETNAMELEN) { 118 return (0); 119 } 120 (void) sprintf(netname, "%s.%ld@%s", OPSYS, (u_long)uid, domain); 121 return (1); 122 } 123 124 125 /* 126 * Convert host to network-name 127 */ 128 int 129 host2netname(netname, host, domain) 130 char netname[MAXNETNAMELEN + 1]; 131 const char *host; 132 const char *domain; 133 { 134 char *dfltdom; 135 char hostname[MAXHOSTNAMELEN+1]; 136 137 if (domain == NULL) { 138 if (__rpc_get_default_domain(&dfltdom) != 0) { 139 return (0); 140 } 141 domain = dfltdom; 142 } 143 if (host == NULL) { 144 (void) gethostname(hostname, sizeof(hostname)); 145 host = hostname; 146 } 147 if (strlen(domain) + 1 + strlen(host) + 1 + strlen(OPSYS) > MAXNETNAMELEN) { 148 return (0); 149 } 150 (void) sprintf(netname, "%s.%s@%s", OPSYS, host, domain); 151 return (1); 152 } 153