kc3-lang/gnulib/lib/savedir.c

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• Hash : 552a680f
  Author :
  Date : 2003-05-29T07:21:59
  

  in lib:
  
  	* addext.c, backupfile.c, fsusage.c, human.c, pathmax.h,
  	rpmatch.c, userspec.c, xreadlink.c, xstrtol.c: Include <limits.h>
  	without checking for HAVE_LIMITS_H.
  	* backupfile.c, fsusage.c, hash.c, human.c, safe-read.c, userspec.c,
  	xstrtol.c (CHAR_BIT) : Don't define, since <limits.h> is guaranteed
  	to do that.
  	* fatal.c: Include <stdarg.h> without checking for __STDC__.
  	* exclude.c: Include <stdbool.h> unconditionally.
  	* tempname.c: Include <stddef.h> unconditionally.
  	* hash.c: Include <limits.h>, since we no longer define CHAR_BIT.
  	* modechange.c, rpmatch.c (NULL): Don't define, since
  	<stddef.h> does that.
  	* quote.c: Dont include <stddef.h> or <sys/types.h>; not needed.
  	* safe-read.c (INT_MAX): Don't define, since <limits.h> does that.
  	* safe-read.c (TYPE_MINIMUM, TYPE_MAXIMUM): Remove; no longer needed.
  	* xstrtol.c: Likewise.
  	* safe-read.c: Remove TYPE_SIGNED; no longer needed.
  	* savedir.c: Include <stddef.h> instead of defining NULL.
  
  in m4:
  
  	* backupfile.m4 (gl_BACKUPFILE): Don't check for limits.h.
  	* fsusage.m4 (gl_PREREQ_FSUSAGE_EXTRA): Likewise.
  	* human.m4 (gl_HUMAN): Likewise.
  	* pathmax.m4 (gl_PATHMAX): Likewise.
  	* rpmatch.m4 (gl_FUNC_RPMATCH): Likewise.
  	* userspec.m4 (gl_USERSPEC): Likewise.
  	* xreadlink.m4 (gl_XREADLINK): Likewise.
  	* m4/xstrtol.m4 (gl_PREREQ_XSTRTOL): Likewise.
  	* quote.m4 (gl_QUOTE): Don't check for stddef.h.
  

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• lib/savedir.c

• /* savedir.c -- save the list of files in a directory in a string
  
     Copyright 1990, 1997, 1998, 1999, 2000, 2001, 2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  
  /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
  
  #if HAVE_CONFIG_H
  # include <config.h>
  #endif
  
  #include <sys/types.h>
  
  #include <errno.h>
  #ifndef errno
  extern int errno;
  #endif
  
  #if HAVE_DIRENT_H
  # include <dirent.h>
  #else
  # define dirent direct
  # if HAVE_SYS_NDIR_H
  #  include <sys/ndir.h>
  # endif
  # if HAVE_SYS_DIR_H
  #  include <sys/dir.h>
  # endif
  # if HAVE_NDIR_H
  #  include <ndir.h>
  # endif
  #endif
  
  #ifdef CLOSEDIR_VOID
  /* Fake a return value. */
  # define CLOSEDIR(d) (closedir (d), 0)
  #else
  # define CLOSEDIR(d) closedir (d)
  #endif
  
  #ifdef STDC_HEADERS
  # include <stdlib.h>
  # include <string.h>
  #endif
  #include <stddef.h>
  
  #include "savedir.h"
  #include "xalloc.h"
  
  /* Return a freshly allocated string containing the filenames
     in directory DIR, separated by '\0' characters;
     the end is marked by two '\0' characters in a row.
     Return NULL (setting errno) if DIR cannot be opened, read, or closed.  */
  
  #ifndef NAME_SIZE_DEFAULT
  # define NAME_SIZE_DEFAULT 512
  #endif
  
  char *
  savedir (const char *dir)
  {
    DIR *dirp;
    struct dirent *dp;
    char *name_space;
    size_t allocated = NAME_SIZE_DEFAULT;
    size_t used = 0;
    int save_errno;
  
    dirp = opendir (dir);
    if (dirp == NULL)
      return NULL;
  
    name_space = xmalloc (allocated);
  
    errno = 0;
    while ((dp = readdir (dirp)) != NULL)
      {
        /* Skip "", ".", and "..".  "" is returned by at least one buggy
           implementation: Solaris 2.4 readdir on NFS filesystems.  */
        char const *entry = dp->d_name;
        if (entry[entry[0] != '.' ? 0 : entry[1] != '.' ? 1 : 2] != '\0')
  	{
  	  size_t entry_size = strlen (entry) + 1;
  	  if (used + entry_size < used)
  	    xalloc_die ();
  	  if (allocated <= used + entry_size)
  	    {
  	      do
  		{
  		  if (2 * allocated < allocated)
  		    xalloc_die ();
  		  allocated *= 2;
  		}
  	      while (allocated <= used + entry_size);
  
  	      name_space = xrealloc (name_space, allocated);
  	    }
  	  memcpy (name_space + used, entry, entry_size);
  	  used += entry_size;
  	}
      }
    name_space[used] = '\0';
    save_errno = errno;
    if (CLOSEDIR (dirp) != 0)
      save_errno = errno;
    if (save_errno != 0)
      {
        free (name_space);
        errno = save_errno;
        return NULL;
      }
    return name_space;
  }
  

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