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/* savedir.c -- save the list of files in a directory in a string
Copyright (C) 1990, 1997-2001, 2009-2012 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 3, 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
#include <config.h>
#include <sys/types.h>
#include <unistd.h>
#include <dirent.h>
#ifdef CLOSEDIR_VOID
/* Fake a return value. */
# define CLOSEDIR(d) (closedir (d), 0)
#else
# define CLOSEDIR(d) closedir (d)
#endif
#include <stdlib.h>
#include <string.h>
#include <fnmatch.h>
#include "savedir.h"
#include "xalloc.h"
static char *path;
static size_t pathlen;
extern int isdir (const char *name);
static int
isdir1 (const char *dir, const char *file)
{
size_t dirlen = strlen (dir);
size_t filelen = strlen (file);
while (dirlen && dir[dirlen - 1] == '/')
dirlen--;
if ((dirlen + filelen + 2) > pathlen)
{
pathlen *= 2;
if ((dirlen + filelen + 2) > pathlen)
pathlen = dirlen + filelen + 2;
path = xrealloc (path, pathlen);
}
memcpy (path, dir, dirlen);
path[dirlen] = '/';
strcpy (path + dirlen + 1, file);
return isdir (path);
}
/* 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, struct exclude *included_patterns,
struct exclude *excluded_patterns, struct exclude *excluded_directory_patterns )
{
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. */
if (name_size <= 0)
name_size = 1;
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 file systems' directories lack them). */
if (dp->d_name[0] != '.'
|| (dp->d_name[1] != '\0'
&& (dp->d_name[1] != '.' || dp->d_name[2] != '\0')))
{
size_t namlen = strlen (dp->d_name);
size_t size_needed = (namep - name_space) + namlen + 2;
if ((included_patterns || excluded_patterns)
&& !isdir1 (dir, dp->d_name))
{
if (included_patterns
&& excluded_file_name (included_patterns, dp->d_name))
continue;
if (excluded_patterns
&& excluded_file_name (excluded_patterns, dp->d_name))
continue;
}
if ( excluded_directory_patterns
&& isdir1 (dir, dp->d_name) )
{
if (excluded_directory_patterns
&& excluded_file_name (excluded_directory_patterns, dp->d_name))
continue;
}
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);
goto fail;
}
namep = new_name_space + (namep - name_space);
name_space = new_name_space;
}
strcpy (namep, dp->d_name);
namep += namlen + 1;
}
}
*namep = '\0';
if (CLOSEDIR (dirp))
{
fail:
free (name_space);
name_space = NULL;
}
if (path)
{
free (path);
path = NULL;
pathlen = 0;
}
return name_space;
}
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