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[] = "@(#)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 #ifndef NGROUPS 65 #define NGROUPS 16 66 #endif 67 68 #define TYPE_BIT(type) (sizeof (type) * CHAR_BIT) 69 70 #define TYPE_SIGNED(type) (((type) -1) < 0) 71 72 /* 73 ** 302 / 1000 is log10(2.0) rounded up. 74 ** Subtract one for the sign bit if the type is signed; 75 ** add one for integer division truncation; 76 ** add one more for a minus sign if the type is signed. 77 */ 78 #define INT_STRLEN_MAXIMUM(type) \ 79 ((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type)) 80 81 static char *OPSYS = "unix"; 82 83 /* 84 * Figure out my fully qualified network name 85 */ 86 int 87 getnetname(name) 88 char name[MAXNETNAMELEN+1]; 89 { 90 uid_t uid; 91 92 uid = geteuid(); 93 if (uid == 0) { 94 return (host2netname(name, (char *) NULL, (char *) NULL)); 95 } else { 96 return (user2netname(name, uid, (char *) NULL)); 97 } 98 } 99 100 101 /* 102 * Convert unix cred to network-name 103 */ 104 int 105 user2netname(netname, uid, domain) 106 char netname[MAXNETNAMELEN + 1]; 107 const uid_t uid; 108 const char *domain; 109 { 110 char *dfltdom; 111 112 if (domain == NULL) { 113 if (__rpc_get_default_domain(&dfltdom) != 0) { 114 return (0); 115 } 116 domain = dfltdom; 117 } 118 if (strlen(domain) + 1 + INT_STRLEN_MAXIMUM(u_long) + 1 + strlen(OPSYS) > MAXNETNAMELEN) { 119 return (0); 120 } 121 (void) sprintf(netname, "%s.%ld@%s", OPSYS, (u_long)uid, domain); 122 return (1); 123 } 124 125 126 /* 127 * Convert host to network-name 128 */ 129 int 130 host2netname(netname, host, domain) 131 char netname[MAXNETNAMELEN + 1]; 132 const char *host; 133 const char *domain; 134 { 135 char *dfltdom; 136 char hostname[MAXHOSTNAMELEN+1]; 137 138 if (domain == NULL) { 139 if (__rpc_get_default_domain(&dfltdom) != 0) { 140 return (0); 141 } 142 domain = dfltdom; 143 } 144 if (host == NULL) { 145 (void) gethostname(hostname, sizeof(hostname)); 146 host = hostname; 147 } 148 if (strlen(domain) + 1 + strlen(host) + 1 + strlen(OPSYS) > MAXNETNAMELEN) { 149 return (0); 150 } 151 (void) sprintf(netname, "%s.%s@%s", OPSYS, host, domain); 152 return (1); 153 } 154