usr/src/lib/libast/common/comp/nftw.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 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  * nftw implementation
  25  */
  26
  27 #include <ast.h>
  28 #include <ftw.h>
  29
  30 static int      nftw_flags;
  31 static int      (*nftw_userf)(const char*, const struct stat*, int, struct FTW*);
  32
  33 static int
  34 nftw_user(Ftw_t* ftw)
  35 {
  36         register int    n = ftw->info;
  37         struct FTW      nftw;
  38         struct stat     st;
  39
  40         if (n & (FTW_C|FTW_NX))
  41                 n = FTW_DNR;
  42         else if ((n & FTW_SL) && (!(nftw_flags & FTW_PHYSICAL) || stat(ftw->path, &st)))
  43                 n = FTW_SLN;
  44         nftw.base = ftw->pathlen - ftw->namelen;
  45         nftw.level = ftw->level;
  46         nftw.quit = 0;
  47         n = (*nftw_userf)(ftw->path, &ftw->statb, n, &nftw);
  48         ftw->status = nftw.quit;
  49         return n;
  50 }
  51
  52 int
  53 nftw(const char* path, int(*userf)(const char*, const struct stat*, int, struct FTW*), int depth, int flags)
  54 {
  55         NoP(depth);
  56         nftw_userf = userf;
  57         if (flags & FTW_CHDIR) flags &= ~FTW_DOT;
  58         else flags |= FTW_DOT;
  59         nftw_flags = flags;
  60         return ftwalk(path, nftw_user, flags, NiL);
  61 }