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*                  Common Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*            http://www.opensource.org/licenses/cpl1.0.txt             *
11*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
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
43extern int
44resolvepath(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