stripslash.c revision 9663:ace9a2ac3683 
1/* stripslash.c -- remove redundant trailing slashes from a file name
2
3   Copyright (C) 1990, 2001, 2003-2006 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#include <config.h>
20
21#include "dirname.h"
22
23/* Remove trailing slashes from FILE.  Return true if a trailing slash
24   was removed.  This is useful when using file name completion from a
25   shell that adds a "/" after directory names (such as tcsh and
26   bash), because on symlinks to directories, several system calls
27   have different semantics according to whether a trailing slash is
28   present.  */
29
30bool
31strip_trailing_slashes (char *file)
32{
33  char *base = last_component (file);
34  char *base_lim;
35  bool had_slash;
36
37  /* last_component returns "" for file system roots, but we need to turn
38     `///' into `/'.  */
39  if (! *base)
40    base = file;
41  base_lim = base + base_len (base);
42  had_slash = (*base_lim != '\0');
43  *base_lim = '\0';
44  return had_slash;
45}
46