lib/xfts.c

   1 /* xfts.c -- a wrapper for fts_open
   2
   3    Copyright (C) 2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 /* Written by Jim Meyering.  */
  20
  21 #if HAVE_CONFIG_H
  22 # include <config.h>
  23 #endif
  24
  25 #include <stdbool.h>
  26
  27 #include "exit.h"
  28 #include "error.h"
  29
  30 #include "gettext.h"
  31 #define _(msgid) gettext (msgid)
  32
  33 #include "quote.h"
  34 #include "xalloc.h"
  35 #include "xfts.h"
  36
  37 /* Fail with a proper diagnostic if fts_open fails.  */
  38
  39 FTS *
  40 xfts_open (char * const *argv, int options,
  41            int (*compar) (const FTSENT **, const FTSENT **))
  42 {
  43   FTS *fts = fts_open (argv, options, compar);
  44   if (fts == NULL)
  45     {
  46       /* This can fail in three ways: out of memory, invalid bit_flags,
  47          and one or more of the FILES is an empty string.  We could try
  48          to decipher that errno==EINVAL means invalid bit_flags and
  49          errno==ENOENT means there's an empty string, but that seems wrong.
  50          Ideally, fts_open would return a proper error indicator.  For now,
  51          we'll presume that the bit_flags are valid and just check for
  52          empty strings.  */
  53       bool invalid_arg = false;
  54       for (; *argv; ++argv)
  55         {
  56           if (**argv == '\0')
  57             invalid_arg = true;
  58         }
  59       if (invalid_arg)
  60         error (EXIT_FAILURE, 0, _("invalid argument: %s"), quote (""));
  61       else
  62         xalloc_die ();
  63     }
  64
  65   return fts;
  66 }