14887Schin /***********************************************************************
24887Schin * *
34887Schin * This software is part of the ast package *
4*12068SRoger.Faulkner@Oracle.COM * Copyright (c) 1985-2010 AT&T Intellectual Property *
54887Schin * and is licensed under the *
64887Schin * Common Public License, Version 1.0 *
78462SApril.Chin@Sun.COM * by AT&T Intellectual Property *
84887Schin * *
94887Schin * A copy of the License is available at *
104887Schin * http://www.opensource.org/licenses/cpl1.0.txt *
114887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
124887Schin * *
134887Schin * Information and Software Systems Research *
144887Schin * AT&T Research *
154887Schin * Florham Park NJ *
164887Schin * *
174887Schin * Glenn Fowler <gsf@research.att.com> *
184887Schin * David Korn <dgk@research.att.com> *
194887Schin * Phong Vo <kpv@research.att.com> *
204887Schin * *
214887Schin ***********************************************************************/
224887Schin #pragma prototyped
234887Schin /*
244887Schin * Glenn Fowler
254887Schin * AT&T Bell Laboratories
264887Schin *
274887Schin * return path to file a/b with access mode using : separated dirs
284887Schin * both a and b may be 0
294887Schin * if a==".." then relative paths in dirs are ignored
304887Schin * if (mode&PATH_REGULAR) then path must not be a directory
314887Schin * if (mode&PATH_ABSOLUTE) then path must be rooted
324887Schin * path returned in path buffer
334887Schin */
344887Schin
354887Schin #include <ast.h>
364887Schin
374887Schin char*
pathaccess(register char * path,register const char * dirs,const char * a,const char * b,register int mode)384887Schin pathaccess(register char* path, register const char* dirs, const char* a, const char* b, register int mode)
394887Schin {
404887Schin int sib = a && a[0] == '.' && a[1] == '.' && a[2] == 0;
414887Schin int sep = ':';
424887Schin char cwd[PATH_MAX];
434887Schin
444887Schin do
454887Schin {
464887Schin dirs = pathcat(path, dirs, sep, a, b);
474887Schin pathcanon(path, 0);
484887Schin if ((!sib || *path == '/') && pathexists(path, mode))
494887Schin {
504887Schin if (*path == '/' || !(mode & PATH_ABSOLUTE))
514887Schin return path;
524887Schin dirs = getcwd(cwd, sizeof(cwd));
534887Schin sep = 0;
544887Schin }
554887Schin } while (dirs);
564887Schin return 0;
574887Schin }
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