138 lines
3.2 KiB
C
138 lines
3.2 KiB
C
/* savedir.c -- save the list of files in a directory in a string
|
|
Copyright (C) 1990, 1997, 1998, 1999, 2000 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>
|
|
|
|
#if HAVE_UNISTD_H
|
|
# include <unistd.h>
|
|
#endif
|
|
|
|
#if HAVE_DIRENT_H
|
|
# include <dirent.h>
|
|
# define NAMLEN(dirent) strlen((dirent)->d_name)
|
|
#else
|
|
# define dirent direct
|
|
# define NAMLEN(dirent) (dirent)->d_namlen
|
|
# 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>
|
|
#else
|
|
char *malloc ();
|
|
char *realloc ();
|
|
#endif
|
|
#ifndef NULL
|
|
# define NULL 0
|
|
#endif
|
|
|
|
#ifndef stpcpy
|
|
char *stpcpy ();
|
|
#endif
|
|
|
|
#include "savedir.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.
|
|
NAME_SIZE is the number of bytes to initially allocate
|
|
for the string; it will be enlarged as needed.
|
|
Return NULL if DIR cannot be opened or if out of memory. */
|
|
|
|
char *
|
|
savedir (const char *dir, off_t name_size)
|
|
{
|
|
DIR *dirp;
|
|
struct dirent *dp;
|
|
char *name_space;
|
|
char *namep;
|
|
|
|
dirp = opendir (dir);
|
|
if (dirp == NULL)
|
|
return NULL;
|
|
|
|
/* Be sure name_size is at least `1' so there's room for
|
|
the final NUL byte. */
|
|
name_size += !name_size;
|
|
|
|
name_space = (char *) malloc (name_size);
|
|
if (name_space == NULL)
|
|
{
|
|
closedir (dirp);
|
|
return NULL;
|
|
}
|
|
namep = name_space;
|
|
|
|
while ((dp = readdir (dirp)) != NULL)
|
|
{
|
|
/* Skip "." and ".." (some NFS filesystems' directories lack them). */
|
|
if (dp->d_name[0] != '.'
|
|
|| (dp->d_name[1] != '\0'
|
|
&& (dp->d_name[1] != '.' || dp->d_name[2] != '\0')))
|
|
{
|
|
off_t size_needed = (namep - name_space) + NAMLEN (dp) + 2;
|
|
|
|
if (size_needed > name_size)
|
|
{
|
|
char *new_name_space;
|
|
|
|
while (size_needed > name_size)
|
|
name_size += 1024;
|
|
|
|
new_name_space = realloc (name_space, name_size);
|
|
if (new_name_space == NULL)
|
|
{
|
|
closedir (dirp);
|
|
return NULL;
|
|
}
|
|
namep += new_name_space - name_space;
|
|
name_space = new_name_space;
|
|
}
|
|
namep = stpcpy (namep, dp->d_name) + 1;
|
|
}
|
|
}
|
|
*namep = '\0';
|
|
if (CLOSEDIR (dirp))
|
|
{
|
|
free (name_space);
|
|
return NULL;
|
|
}
|
|
return name_space;
|
|
}
|