1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include <unistd.h> 28 #include <strings.h> 29 #include <limits.h> 30 #include <dlfcn.h> 31 #include "_conv.h" 32 #include "lddstub_msg.h" 33 34 static int 35 originlddstub(char *buffer, const char *orgfile) 36 { 37 int len; 38 39 if (dlinfo(RTLD_SELF, RTLD_DI_ORIGIN, (void *)buffer) == -1) 40 return (-1); 41 if (strlcat(buffer, orgfile, PATH_MAX) >= PATH_MAX) 42 return (-1); 43 if ((len = resolvepath(buffer, buffer, (PATH_MAX - 1))) == -1) 44 return (-1); 45 buffer[len] = '\0'; 46 if (access(buffer, X_OK) == -1) 47 return (-1); 48 49 return (1); 50 } 51 52 static char orgstub[PATH_MAX], orgstub64[PATH_MAX]; 53 static int orgflag, orgflag64; 54 55 /* 56 * Determine what lddstub to run. 57 */ 58 const char * 59 conv_lddstub(int class) 60 { 61 const char *stub; 62 63 /* 64 * Establish defaults. 65 */ 66 if (class == ELFCLASS32) 67 stub = MSG_ORIG(MSG_PTH_LDDSTUB); 68 else 69 stub = MSG_ORIG(MSG_PTH_LDDSTUB_64); 70 71 /* 72 * Provided we're not secure, determine lddstub's location from our 73 * own origin. 74 */ 75 if (geteuid()) { 76 if ((class == ELFCLASS32) && (orgflag != -1)) { 77 if (orgflag == 0) { 78 /* BEGIN CSTYLED */ 79 if ((orgflag = originlddstub(orgstub, 80 #ifdef _LP64 81 MSG_ORIG(MSG_ORG_64LDD_32STUB))) == -1) 82 #else 83 MSG_ORIG(MSG_ORG_32LDD_32STUB))) == -1) 84 #endif 85 return (stub); 86 /* END CSTYLED */ 87 } 88 stub = (const char *)orgstub; 89 } 90 if ((class == ELFCLASS64) && (orgflag64 != -1)) { 91 if (orgflag64 == 0) { 92 /* BEGIN CSTYLED */ 93 if ((orgflag64 = originlddstub(orgstub64, 94 #ifdef _LP64 95 MSG_ORIG(MSG_ORG_64LDD_64STUB))) == -1) 96 #else 97 MSG_ORIG(MSG_ORG_32LDD_64STUB))) == -1) 98 #endif 99 return (stub); 100 /* END CSTYLED */ 101 } 102 stub = (const char *)orgstub64; 103 } 104 } 105 return (stub); 106 } 107