148 lines
4.0 KiB
C
148 lines
4.0 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: savedir.c,v 1.1 94/04/13 18:26:54 rws Exp $ */
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/* savedir.c -- save the list of files in a directory in a string
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Copyright 1990, 1993 Free Software Foundation, Inc.
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Permission to use, copy, modify, and distribute this program for
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any purpose and without fee is hereby granted, provided that this
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copyright and permission notice appear on all copies, and that
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notice be given that copying and distribution is by permission of
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the Free Software Foundation. The Free Software Foundation makes
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no representations about the suitability of this software for any
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purpose. It is provided "as is" without expressed or implied
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warranty.
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(The FSF has modified its usual distribution terms, for this file,
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as a courtesy to the X project.) */
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/* Written by David MacKenzie <djm@ai.mit.edu>.
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Modified to use <dirent.h> by default. Per Bothner <bothner@cygnus.com>. */
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#include <sys/types.h>
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#if !defined(DIRECT) && !defined(BSD)
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#include <dirent.h>
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#define NLENGTH(direct) (strlen((direct)->d_name))
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#else
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#undef dirent
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#define dirent direct
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#define NLENGTH(direct) ((direct)->d_namlen)
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#ifdef BSD
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#include <sys/dir.h>
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#else
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#ifdef SYSNDIR
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#include <sys/ndir.h>
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#else
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#include <ndir.h>
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#endif
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#endif
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#endif
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#if defined(VOID_CLOSEDIR) || defined(BSD)
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/* Fake a return value. */
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#define CLOSEDIR(d) (closedir (d), 0)
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#else
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#define CLOSEDIR(d) closedir (d)
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#endif
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#ifdef STDC_HEADERS
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#include <stdlib.h>
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#include <string.h>
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#else
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char *malloc ();
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char *realloc ();
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int strlen ();
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#ifndef NULL
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#define NULL 0
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#endif
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#endif
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char *stpcpy ();
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/* Return a freshly allocated string containing the filenames
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in directory DIR, separated by '\0' characters;
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the end is marked by two '\0' characters in a row.
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NAME_SIZE is the number of bytes to initially allocate
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for the string; it will be enlarged as needed.
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Return NULL if DIR cannot be opened or if out of memory. */
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char *
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savedir (dir, name_size)
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char *dir;
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unsigned name_size;
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{
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DIR *dirp;
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struct dirent *dp;
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char *name_space;
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char *namep;
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dirp = opendir (dir);
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if (dirp == NULL)
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return NULL;
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name_space = (char *) malloc (name_size);
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if (name_space == NULL)
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{
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closedir (dirp);
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return NULL;
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}
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namep = name_space;
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while ((dp = readdir (dirp)) != NULL)
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{
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/* Skip "." and ".." (some NFS filesystems' directories lack them). */
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if (dp->d_name[0] != '.'
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|| (dp->d_name[1] != '\0'
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&& (dp->d_name[1] != '.' || dp->d_name[2] != '\0')))
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{
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unsigned size_needed = (namep - name_space) + NLENGTH (dp) + 2;
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if (size_needed > name_size)
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{
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char *new_name_space;
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while (size_needed > name_size)
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name_size += 1024;
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new_name_space = realloc (name_space, name_size);
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if (new_name_space == NULL)
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{
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closedir (dirp);
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return NULL;
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}
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namep += new_name_space - name_space;
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name_space = new_name_space;
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}
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strcpy (namep, dp->d_name);
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namep += strlen (namep) + 1;
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}
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}
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*namep = '\0';
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if (CLOSEDIR (dirp))
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{
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free (name_space);
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return NULL;
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}
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return name_space;
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}
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