1  /* stripslash.c -- remove redundant trailing slashes from a file name
       2  
       3     Copyright (C) 1990, 2001, 2003-2006, 2009-2023 Free Software Foundation,
       4     Inc.
       5  
       6     This file is free software: you can redistribute it and/or modify
       7     it under the terms of the GNU Lesser General Public License as
       8     published by the Free Software Foundation; either version 2.1 of the
       9     License, or (at your option) any later version.
      10  
      11     This file is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14     GNU Lesser General Public License for more details.
      15  
      16     You should have received a copy of the GNU Lesser General Public License
      17     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      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  
      30  bool
      31  strip_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  }