1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
4 *               2005-2007 Takahiro Hirofuchi
5 */
6
7#include <errno.h>
8#include <stdio.h>
9#include <string.h>
10
11#include "usbip_common.h"
12#include "utils.h"
13#include "sysfs_utils.h"
14
15int modify_match_busid(char *busid, int add)
16{
17	char attr_name[] = "match_busid";
18	char command[SYSFS_BUS_ID_SIZE + 4];
19	char match_busid_attr_path[SYSFS_PATH_MAX];
20	int rc;
21	int cmd_size;
22
23	snprintf(match_busid_attr_path, sizeof(match_busid_attr_path),
24		 "%s/%s/%s/%s/%s/%s", SYSFS_MNT_PATH, SYSFS_BUS_NAME,
25		 SYSFS_BUS_TYPE, SYSFS_DRIVERS_NAME, USBIP_HOST_DRV_NAME,
26		 attr_name);
27
28	if (add)
29		cmd_size = snprintf(command, SYSFS_BUS_ID_SIZE + 4, "add %s",
30				    busid);
31	else
32		cmd_size = snprintf(command, SYSFS_BUS_ID_SIZE + 4, "del %s",
33				    busid);
34
35	rc = write_sysfs_attribute(match_busid_attr_path, command,
36				   cmd_size);
37	if (rc < 0) {
38		dbg("failed to write match_busid: %s", strerror(errno));
39		return -1;
40	}
41
42	return 0;
43}
44