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 
modify_match_busid(char * busid,int add)15 int 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