libkmod: fix return error when opening index

[thirdparty/kmod.git] / libkmod / libkmod-index.h

/*
 * libkmod - interface to kernel module operations
 *
 * Copyright (C) 2011-2013  ProFUSION embedded systems
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include <inttypes.h>

struct index_value {
	struct index_value *next;
	unsigned int priority;
	unsigned int len;
	char value[0];
};

/* In-memory index (depmod only) */
struct index_file;
struct index_file *index_file_open(const char *filename);
void index_file_close(struct index_file *idx);
char *index_search(struct index_file *idx, const char *key);
void index_dump(struct index_file *in, int fd, const char *prefix);
struct index_value *index_searchwild(struct index_file *idx, const char *key);

void index_values_free(struct index_value *values);

/* Implementation using mmap */
struct index_mm;
int index_mm_open(const struct kmod_ctx *ctx, const char *filename,
		  unsigned long long *stamp, struct index_mm **pidx);
void index_mm_close(struct index_mm *index);
char *index_mm_search(struct index_mm *idx, const char *key);
struct index_value *index_mm_searchwild(struct index_mm *idx, const char *key);
void index_mm_dump(struct index_mm *idx, int fd, const char *prefix);