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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* xattr.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "sqfs2tar.h"
static tar_xattr_t *mkxattr(const sqfs_xattr_entry_t *key,
const sqfs_xattr_value_t *value)
{
tar_xattr_t *ent;
ent = calloc(1, sizeof(*ent) + strlen((const char *)key->key) +
value->size + 2);
if (ent == NULL) {
perror("creating xattr entry");
return NULL;
}
ent->key = ent->data;
ent->value = (sqfs_u8 *)ent->key + strlen((const char *)key->key) + 1;
ent->value_len = value->size;
strcpy(ent->key, (const char *)key->key);
memcpy(ent->value, value->value, value->size + 1);
return ent;
}
int get_xattrs(const char *name, const sqfs_inode_generic_t *inode,
tar_xattr_t **out)
{
tar_xattr_t *list = NULL, *ent;
sqfs_xattr_value_t *value;
sqfs_xattr_entry_t *key;
sqfs_xattr_id_t desc;
sqfs_u32 index;
size_t i;
int ret;
if (xr == NULL)
return 0;
sqfs_inode_get_xattr_index(inode, &index);
if (index == 0xFFFFFFFF)
return 0;
ret = sqfs_xattr_reader_get_desc(xr, index, &desc);
if (ret) {
sqfs_perror(name, "resolving xattr index", ret);
return -1;
}
ret = sqfs_xattr_reader_seek_kv(xr, &desc);
if (ret) {
sqfs_perror(name, "locating xattr key-value pairs", ret);
return -1;
}
for (i = 0; i < desc.count; ++i) {
ret = sqfs_xattr_reader_read_key(xr, &key);
if (ret) {
sqfs_perror(name, "reading xattr key", ret);
goto fail;
}
ret = sqfs_xattr_reader_read_value(xr, key, &value);
if (ret) {
sqfs_perror(name, "reading xattr value", ret);
sqfs_free(key);
goto fail;
}
ent = mkxattr(key, value);
sqfs_free(key);
sqfs_free(value);
if (ent == NULL)
goto fail;
ent->next = list;
list = ent;
}
*out = list;
return 0;
fail:
free_xattr_list(list);
return -1;
}
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