lib/xfts.c

   1 /* xfts.c -- a wrapper for fts_open
   2
   3    Copyright (C) 2003, 2005, 2006 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 /* Written by Jim Meyering.  */
  20
  21 #include <config.h>
  22
  23 #include <stdbool.h>
  24
  25 #include "exit.h"
  26 #include "error.h"
  27
  28 #include "gettext.h"
  29 #define _(msgid) gettext (msgid)
  30
  31 #include "quote.h"
  32 #include "xalloc.h"
  33 #include "xfts.h"
  34
  35 /* Fail with a proper diagnostic if fts_open fails.  */
  36
  37 FTS *
  38 xfts_open (char * const *argv, int options,
  39            int (*compar) (const FTSENT **, const FTSENT **))
  40 {
  41   FTS *fts = fts_open (argv, options | FTS_CWDFD, compar);
  42   if (fts == NULL)
  43     {
  44       /* This can fail in three ways: out of memory, invalid bit_flags,
  45          and one or more of the FILES is an empty string.  We could try
  46          to decipher that errno==EINVAL means invalid bit_flags and
  47          errno==ENOENT means there's an empty string, but that seems wrong.
  48          Ideally, fts_open would return a proper error indicator.  For now,
  49          we'll presume that the bit_flags are valid and just check for
  50          empty strings.  */
  51       bool invalid_arg = false;
  52       for (; *argv; ++argv)
  53         {
  54           if (**argv == '\0')
  55             invalid_arg = true;
  56         }
  57       if (invalid_arg)
  58         error (EXIT_FAILURE, 0, _("invalid argument: %s"), quote (""));
  59       else
  60         xalloc_die ();
  61     }
  62
  63   return fts;
  64 }