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/*
* Squashfs
*
* Copyright (c) 2021, 2022
* Phillip Lougher <phillip@squashfs.org.uk>
*
* 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* tar_xattr.c
*/
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <regex.h>
#include "squashfs_fs.h"
#include "mksquashfs.h"
#include "mksquashfs_error.h"
#include "tar.h"
#include "xattr.h"
#define TRUE 1
#define FALSE 0
extern regex_t *xattr_exclude_preg;
extern regex_t *xattr_include_preg;
void read_tar_xattr(char *name, char *value, int size, int encoding, struct tar_file *file)
{
char *data;
struct xattr_list *xattr;
int i;
/* Some tars output both LIBARCHIVE and SCHILY xattrs, which
* will lead to multiple definitions of the same xattr.
* So check that this xattr hasn't already been defined */
for(i = 0; i < file->xattrs; i++)
if(strcmp(name, file->xattr_list[i].full_name) == 0)
return;
if(xattr_exclude_preg) {
int res = regexec(xattr_exclude_preg, name, (size_t) 0, NULL, 0);
if(res == 0)
return;
}
if(xattr_include_preg) {
int res = regexec(xattr_include_preg, name, (size_t) 0, NULL, 0);
if(res)
return;
}
if(encoding == ENCODING_BASE64) {
data = base64_decode(value, size, &size);
if(data == NULL) {
ERROR("Invalid LIBARCHIVE xattr base64 value, ignoring\n");
return;
}
} else {
data = malloc(size);
if(data == NULL)
MEM_ERROR();
memcpy(data, value, size);
}
file->xattr_list = realloc(file->xattr_list, (file->xattrs + 1) *
sizeof(struct xattr_list));
if(file->xattr_list == NULL)
MEM_ERROR();
xattr = &file->xattr_list[file->xattrs];
xattr->type = xattr_get_prefix(xattr, name);
if(xattr->type == -1) {
ERROR("Unrecognised tar xattr prefix %s, ignoring\n", name);
free(data);
return;
}
xattr->value = data;
xattr->vsize = size;
file->xattrs ++;
}
int read_xattrs_from_tarfile(struct inode_info *inode, struct xattr_list **xattr_list)
{
if(inode->tar_file) {
*xattr_list = inode->tar_file->xattr_list;
return inode->tar_file->xattrs;
} else
return 0;
}
void free_tar_xattrs(struct tar_file *file)
{
int i;
for(i = 0; i < file->xattrs; i++)
free(file->xattr_list[i].full_name);
free(file->xattr_list);
}
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