1*4887Schin /***********************************************************************
2*4887Schin *                                                                      *
3*4887Schin *               This software is part of the ast package               *
4*4887Schin *           Copyright (c) 1985-2007 AT&T Knowledge Ventures            *
5*4887Schin *                      and is licensed under the                       *
6*4887Schin *                  Common Public License, Version 1.0                  *
7*4887Schin *                      by AT&T Knowledge Ventures                      *
8*4887Schin *                                                                      *
9*4887Schin *                A copy of the License is available at                 *
10*4887Schin *            http://www.opensource.org/licenses/cpl1.0.txt             *
11*4887Schin *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*4887Schin *                                                                      *
13*4887Schin *              Information and Software Systems Research               *
14*4887Schin *                            AT&T Research                             *
15*4887Schin *                           Florham Park NJ                            *
16*4887Schin *                                                                      *
17*4887Schin *                 Glenn Fowler <gsf@research.att.com>                  *
18*4887Schin *                  David Korn <dgk@research.att.com>                   *
19*4887Schin *                   Phong Vo <kpv@research.att.com>                    *
20*4887Schin *                                                                      *
21*4887Schin ***********************************************************************/
22*4887Schin #pragma prototyped
23*4887Schin /*
24*4887Schin  * resolvepath implementation
25*4887Schin  */
26*4887Schin 
27*4887Schin #define resolvepath	______resolvepath
28*4887Schin 
29*4887Schin #include <ast.h>
30*4887Schin #include <error.h>
31*4887Schin 
32*4887Schin #undef	resolvepath
33*4887Schin 
34*4887Schin #undef	_def_map_ast
35*4887Schin #include <ast_map.h>
36*4887Schin 
37*4887Schin #if defined(__EXPORT__)
38*4887Schin #define extern	__EXPORT__
39*4887Schin #endif
40*4887Schin 
41*4887Schin extern char*
42*4887Schin resolvepath(const char* file, char* path, size_t size)
43*4887Schin {
44*4887Schin 	register char*	s;
45*4887Schin 	register int	n;
46*4887Schin 	register int	r;
47*4887Schin 
48*4887Schin 	r = *file != '/';
49*4887Schin 	n = strlen(file) + r + 1;
50*4887Schin 	if (n >= size)
51*4887Schin 	{
52*4887Schin #ifdef ENAMETOOLONG
53*4887Schin 		errno = ENAMETOOLONG;
54*4887Schin #else
55*4887Schin 		errno = ENOMEM;
56*4887Schin #endif
57*4887Schin 		return 0;
58*4887Schin 	}
59*4887Schin 	if (!r)
60*4887Schin 		s = path;
61*4887Schin 	else if (!getcwd(path, size - n))
62*4887Schin 		return 0;
63*4887Schin 	else
64*4887Schin 	{
65*4887Schin 		s = path + strlen(path);
66*4887Schin 		*s++ = '/';
67*4887Schin 	}
68*4887Schin 	strcpy(s, file);
69*4887Schin 	return pathcanon(path, PATH_PHYSICAL|PATH_DOTDOT|PATH_EXISTS) ? path : (char*)0;
70*4887Schin }
71