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
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
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