Line data    Source code

       1             : /* xfts.c -- a wrapper for fts_open
       2             : 
       3             :    Copyright (C) 2003, 2005-2007 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 3 of the License, or
       8             :    (at your option) 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, see <http://www.gnu.org/licenses/>.  */
      17             : 
      18             : /* Written by Jim Meyering.  */
      19             : 
      20             : #include <config.h>
      21             : 
      22             : #include <stdbool.h>
      23             : #include <stdlib.h>
      24             : 
      25             : #include "error.h"
      26             : 
      27             : #include "gettext.h"
      28             : #define _(msgid) gettext (msgid)
      29             : 
      30             : #include "quote.h"
      31             : #include "xalloc.h"
      32             : #include "xfts.h"
      33             : 
      34             : /* Fail with a proper diagnostic if fts_open fails.  */
      35             : 
      36             : FTS *
      37         197 : xfts_open (char * const *argv, int options,
      38             :            int (*compar) (const FTSENT **, const FTSENT **))
      39             : {
      40         197 :   FTS *fts = fts_open (argv, options | FTS_CWDFD, compar);
      41         197 :   if (fts == NULL)
      42             :     {
      43             :       /* This can fail in three ways: out of memory, invalid bit_flags,
      44             :          and one or more of the FILES is an empty string.  We could try
      45             :          to decipher that errno==EINVAL means invalid bit_flags and
      46             :          errno==ENOENT means there's an empty string, but that seems wrong.
      47             :          Ideally, fts_open would return a proper error indicator.  For now,
      48             :          we'll presume that the bit_flags are valid and just check for
      49             :          empty strings.  */
      50          21 :       bool invalid_arg = false;
      51          50 :       for (; *argv; ++argv)
      52             :         {
      53          29 :           if (**argv == '\0')
      54          21 :             invalid_arg = true;
      55             :         }
      56          21 :       if (invalid_arg)
      57          21 :         error (EXIT_FAILURE, 0, _("invalid argument: %s"), quote (""));
      58             :       else
      59           0 :         xalloc_die ();
      60             :     }
      61             : 
      62         176 :   return fts;
      63             : }