1 /* 2 * BinReloc - a library for creating relocatable executables 3 * Written by: Mike Hearn <mike@theoretic.com> 4 * Hongli Lai <h.lai@chello.nl> 5 * http://autopackage.org/ 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 3 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this library; if not, write to the 19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 20 * Boston, MA 02111-1307, USA. 21 * 22 * See http://autopackage.org/docs/binreloc/ for 23 * more information and how to use this. 24 * 25 * NOTE: if you're using C++ and are getting "undefined reference 26 * to br_*", try renaming prefix.c to prefix.cpp 27 */ 28 29 #ifndef _PREFIX_H_ 30 #define _PREFIX_H_ 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif /* __cplusplus */ 35 36 /* WARNING, BEFORE YOU MODIFY PREFIX.C: 37 * 38 * If you make changes to any of the functions in prefix.c, you MUST 39 * change the BR_NAMESPACE macro. 40 * This way you can avoid symbol table conflicts with other libraries 41 * that also happen to use BinReloc. 42 * 43 * Example: 44 * #define BR_NAMESPACE(funcName) foobar_ ## funcName 45 * --> expands br_locate to foobar_br_locate 46 */ 47 #undef BR_NAMESPACE 48 #define BR_NAMESPACE(funcName) funcName 49 50 51 #ifdef ENABLE_BINRELOC 52 53 #define br_thread_local_store BR_NAMESPACE(br_thread_local_store) 54 #define br_locate BR_NAMESPACE(br_locate) 55 #define br_locate_prefix BR_NAMESPACE(br_locate_prefix) 56 #define br_prepend_prefix BR_NAMESPACE(br_prepend_prefix) 57 58 /* These are convience macros that replace the ones usually used 59 in Autoconf/Automake projects */ 60 #undef SELFPATH 61 #undef PREFIX 62 #undef PREFIXDIR 63 #undef BINDIR 64 #undef SBINDIR 65 #undef DATADIR 66 #undef LIBDIR 67 #undef LIBEXECDIR 68 #undef ETCDIR 69 #undef SYSCONFDIR 70 #undef CONFDIR 71 #undef LOCALEDIR 72 73 #define SELFPATH (br_thread_local_store (br_locate ((void *) ""))) 74 #define PREFIX (br_thread_local_store (br_locate_prefix ((void *) ""))) 75 #define PREFIXDIR (br_thread_local_store (br_locate_prefix ((void *) ""))) 76 #define BINDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/bin"))) 77 #define SBINDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/sbin"))) 78 #define DATADIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/share"))) 79 #define LIBDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/lib"))) 80 #define LIBEXECDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/libexec"))) 81 #define ETCDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/etc"))) 82 #define SYSCONFDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/etc"))) 83 #define CONFDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/etc"))) 84 #define LOCALEDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/share/locale"))) 85 86 /* The following functions are used internally by BinReloc 87 and shouldn't be used directly in applications. */ 88 89 const char *br_thread_local_store (char *str); 90 char *br_locate (void *symbol); 91 char *br_locate_prefix (void *symbol); 92 char *br_prepend_prefix (void *symbol, char *path); 93 94 95 #endif /* ENABLE_BINRELOC */ 96 97 98 /* These macros and functions are not guarded by the ENABLE_BINRELOC 99 * macro because they are portable. You can use these functions. 100 */ 101 102 #define br_strcat BR_NAMESPACE(br_strcat) 103 #define br_extract_dir BR_NAMESPACE(br_extract_dir) 104 #define br_extract_prefix BR_NAMESPACE(br_extract_prefix) 105 106 /* Convenience functions for concatenating paths */ 107 #define BR_SELFPATH(suffix) (br_thread_local_store (br_strcat (SELFPATH, suffix))) 108 #define BR_PREFIX(suffix) (br_thread_local_store (br_strcat (PREFIX, suffix))) 109 #define BR_PREFIXDIR(suffix) (br_thread_local_store (br_strcat (BR_PREFIX, suffix))) 110 #define BR_BINDIR(suffix) (br_thread_local_store (br_strcat (BINDIR, suffix))) 111 #define BR_SBINDIR(suffix) (br_thread_local_store (br_strcat (SBINDIR, suffix))) 112 #define BR_DATADIR(suffix) (br_thread_local_store (br_strcat (DATADIR, suffix))) 113 #define BR_LIBDIR(suffix) (br_thread_local_store (br_strcat (LIBDIR, suffix))) 114 #define BR_LIBEXECDIR(suffix) (br_thread_local_store (br_strcat (LIBEXECDIR, suffix))) 115 #define BR_ETCDIR(suffix) (br_thread_local_store (br_strcat (ETCDIR, suffix))) 116 #define BR_SYSCONFDIR(suffix) (br_thread_local_store (br_strcat (SYSCONFDIR, suffix))) 117 #define BR_CONFDIR(suffix) (br_thread_local_store (br_strcat (CONFDIR, suffix))) 118 #define BR_LOCALEDIR(suffix) (br_thread_local_store (br_strcat (LOCALEDIR, suffix))) 119 120 char *br_strcat (const char *str1, const char *str2); 121 char *br_extract_dir (const char *path); 122 char *br_extract_prefix(const char *path); 123 124 125 #ifdef __cplusplus 126 } 127 #endif /* __cplusplus */ 128 129 #endif /* _PREFIX_H_ */ 130