1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2011 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Eclipse Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.eclipse.org/org/documents/epl-v10.html * 11 * (with md5 checksum b35adb5213ca9657e911e9befb180842) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * David Korn <dgk@research.att.com> * 19 * Phong Vo <kpv@research.att.com> * 20 * * 21 ***********************************************************************/ 22 #pragma prototyped 23 /* 24 * resolvepath implementation 25 */ 26 27 #define resolvepath ______resolvepath 28 29 #include <ast.h> 30 #include <error.h> 31 32 #undef resolvepath 33 34 #undef _def_map_ast 35 #include <ast_map.h> 36 #undef _AST_API_H 37 #include <ast_api.h> 38 39 #if defined(__EXPORT__) 40 #define extern __EXPORT__ 41 #endif 42 43 extern int 44 resolvepath(const char* file, char* path, size_t size) 45 { 46 register char* s; 47 register int n; 48 register int r; 49 50 r = *file != '/'; 51 n = strlen(file) + r + 1; 52 if (n >= size) 53 { 54 #ifdef ENAMETOOLONG 55 errno = ENAMETOOLONG; 56 #else 57 errno = ENOMEM; 58 #endif 59 return 0; 60 } 61 if (!r) 62 s = path; 63 else if (!getcwd(path, size - n)) 64 return 0; 65 else 66 { 67 s = path + strlen(path); 68 *s++ = '/'; 69 } 70 strlcpy(s, file, size - (s - path)); 71 return (s = pathcanon(path, size, PATH_PHYSICAL|PATH_DOTDOT|PATH_EXISTS)) ? (s - path) : -1; 72 } 73