1 files changed, 64 insertions, 0 deletions
diff --git a/lib/xfts.c b/lib/xfts.c
new file mode 100644
index 0000000..1402e95
--- /dev/null
+++ b/lib/xfts.c
@@ -0,0 +1,64 @@
+/* xfts.c -- a wrapper for fts_open
+
+   Copyright (C) 2003, 2005-2007 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* Written by Jim Meyering.  */
+
+#include <config.h>
+
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include "error.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+#include "quote.h"
+#include "xalloc.h"
+#include "xfts.h"
+
+/* Fail with a proper diagnostic if fts_open fails.  */
+
+FTS *
+xfts_open (char * const *argv, int options,
+	   int (*compar) (const FTSENT **, const FTSENT **))
+{
+  FTS *fts = fts_open (argv, options | FTS_CWDFD, compar);
+  if (fts == NULL)
+    {
+      /* This can fail in three ways: out of memory, invalid bit_flags,
+	 and one or more of the FILES is an empty string.  We could try
+	 to decipher that errno==EINVAL means invalid bit_flags and
+	 errno==ENOENT means there's an empty string, but that seems wrong.
+	 Ideally, fts_open would return a proper error indicator.  For now,
+	 we'll presume that the bit_flags are valid and just check for
+	 empty strings.  */
+      bool invalid_arg = false;
+      for (; *argv; ++argv)
+	{
+	  if (**argv == '\0')
+	    invalid_arg = true;
+	}
+      if (invalid_arg)
+	error (EXIT_FAILURE, 0, _("invalid argument: %s"), quote (""));
+      else
+	xalloc_die ();
+    }
+
+  return fts;
+}