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path: root/lib/sqfs/xattr.c
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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
 * write_xattr.c
 *
 * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
 */
#include "config.h"
#include "sqfs/squashfs.h"

#include <string.h>

static const struct {
	const char *prefix;
	E_SQFS_XATTR_TYPE type;
} xattr_types[] = {
	{ "user.", SQUASHFS_XATTR_USER },
	{ "trusted.", SQUASHFS_XATTR_TRUSTED },
	{ "security.", SQUASHFS_XATTR_SECURITY },
};

int sqfs_get_xattr_prefix_id(const char *key)
{
	size_t i, len;

	for (i = 0; i < sizeof(xattr_types) / sizeof(xattr_types[0]); ++i) {
		len = strlen(xattr_types[i].prefix);

		if (strncmp(key, xattr_types[i].prefix, len) == 0 &&
		    strlen(key) > len) {
			return xattr_types[i].type;
		}
	}

	return -1;
}

const char *sqfs_get_xattr_prefix(E_SQFS_XATTR_TYPE id)
{
	size_t i;

	for (i = 0; i < sizeof(xattr_types) / sizeof(xattr_types[0]); ++i) {
		if (xattr_types[i].type == id)
			return xattr_types[i].prefix;
	}

	return NULL;
}

bool sqfs_has_xattr(const char *key)
{
	return sqfs_get_xattr_prefix_id(key) >= 0;
}