/*
# xrename.c: conceptually rename with error checking.
#
# Copyright (C) 1992, 2011 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
#
*/


#include "config.h"


/* Copy FROM to TO, then unlink FROM.  It would probably be faster to
   read and write buffers, but the files we use this for aren't big
   enough for it to make a substantial difference.  */

void
xrename (string from, string to)
{
  int c;
  FILE *input = xfopen (from, "r");
  FILE *output = xfopen (to, "w");

  while ((c = getc (input)) != EOF || !feof (input))
    putc (c, output);

  xfclose (input, from);
  xfclose (output, to);

  if (unlink (from) != 0)
    {
      fprintf (stderr, "warning: Could not unlink ");
      perror (from);
    }
}