1  /* Copyright (C) 1998-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library.  If not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  /* This file contains only wrappers around the real glob functions.  It
      19     became necessary since the glob_t structure changed.  */
      20  #include <sys/types.h>
      21  #include <glob.h>
      22  #include <shlib-compat.h>
      23  
      24  #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
      25  
      26  /* This is the old structure.  The difference is that the gl_pathc and
      27     gl_offs elements have type `int'.  */
      28  typedef struct
      29    {
      30      int gl_pathc;		/* Count of paths matched by the pattern.  */
      31      char **gl_pathv;		/* List of matched pathnames.  */
      32      int gl_offs;		/* Slots to reserve in `gl_pathv'.  */
      33      int gl_flags;		/* Set to FLAGS, maybe | GLOB_MAGCHAR.  */
      34  
      35      /* If the GLOB_ALTDIRFUNC flag is set, the following functions
      36         are used instead of the normal file access functions.  */
      37      void (*gl_closedir) (void *);
      38      struct dirent *(*gl_readdir) (void *);
      39      void *(*gl_opendir) (const char *);
      40      int (*gl_lstat) (const char *, struct stat *);
      41      int (*gl_stat) (const char *, struct stat *);
      42    } old_glob_t;
      43  
      44  
      45  int
      46  attribute_compat_text_section
      47  __old_glob (const char *pattern, int flags,
      48  	    int (*errfunc) (const char *, int),
      49  	    old_glob_t *pglob)
      50  {
      51    glob_t correct;
      52    int result;
      53  
      54    /* Construct an object of correct type.  */
      55    correct.gl_pathc = pglob->gl_pathc;
      56    correct.gl_pathv = pglob->gl_pathv;
      57    correct.gl_offs = pglob->gl_offs;
      58    correct.gl_flags = pglob->gl_flags;
      59    correct.gl_closedir = pglob->gl_closedir;
      60    correct.gl_readdir = pglob->gl_readdir;
      61    correct.gl_opendir = pglob->gl_opendir;
      62    /* Set gl_lstat and gl_stat for both gl_stat for compatibility with old
      63       implementation that did not follow dangling symlinks.  */
      64    correct.gl_lstat = pglob->gl_stat;
      65    correct.gl_stat = pglob->gl_stat;
      66  
      67    result = glob (pattern, flags, errfunc, &correct);
      68  
      69    /* And convert it back.  */
      70    pglob->gl_pathc = correct.gl_pathc;
      71    pglob->gl_pathv = correct.gl_pathv;
      72    pglob->gl_offs = correct.gl_offs;
      73    pglob->gl_flags = correct.gl_flags;
      74    pglob->gl_closedir = correct.gl_closedir;
      75    pglob->gl_readdir = correct.gl_readdir;
      76    pglob->gl_opendir = correct.gl_opendir;
      77    /* Only need to restore gl_stat.  */
      78    pglob->gl_stat = correct.gl_stat;
      79  
      80    return result;
      81  }
      82  compat_symbol (libc, __old_glob, glob, GLIBC_2_0);
      83  
      84  
      85  /* Free storage allocated in PGLOB by a previous `glob' call.  */
      86  void
      87  attribute_compat_text_section
      88  __old_globfree (old_glob_t *pglob)
      89  {
      90    glob_t correct;
      91  
      92    /* We only need these two symbols.  */
      93    correct.gl_pathc = pglob->gl_pathc;
      94    correct.gl_pathv = pglob->gl_pathv;
      95    correct.gl_offs = pglob->gl_offs;
      96  
      97    globfree (&correct);
      98  }
      99  compat_symbol (libc, __old_globfree, globfree, GLIBC_2_0);
     100  
     101  #endif