2 * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
3 * 2005-2007 Takahiro Hirofuchi
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #include <sysfs/libsysfs.h>
25 #include "usbip_common.h"
28 int modify_match_busid(char *busid, int add)
30 char bus_type[] = "usb";
31 char attr_name[] = "match_busid";
32 char buff[SYSFS_BUS_ID_SIZE + 4];
33 char sysfs_mntpath[SYSFS_PATH_MAX];
34 char match_busid_attr_path[SYSFS_PATH_MAX];
35 struct sysfs_attribute *match_busid_attr;
39 if (strnlen(busid, SYSFS_BUS_ID_SIZE) > SYSFS_BUS_ID_SIZE - 1) {
40 dbg("busid is too long");
44 rc = sysfs_get_mnt_path(sysfs_mntpath, SYSFS_PATH_MAX);
46 err("sysfs must be mounted: %s", strerror(errno));
50 snprintf(match_busid_attr_path, sizeof(match_busid_attr_path),
51 "%s/%s/%s/%s/%s/%s", sysfs_mntpath, SYSFS_BUS_NAME, bus_type,
52 SYSFS_DRIVERS_NAME, USBIP_HOST_DRV_NAME, attr_name);
54 match_busid_attr = sysfs_open_attribute(match_busid_attr_path);
55 if (!match_busid_attr) {
56 dbg("problem getting match_busid attribute: %s",
62 cmd_size = snprintf(buff, SYSFS_BUS_ID_SIZE + 4, "add %s",
65 cmd_size = snprintf(buff, SYSFS_BUS_ID_SIZE + 4, "del %s",
68 dbg("write \"%s\" to %s", buff, match_busid_attr->path);
70 rc = sysfs_write_attribute(match_busid_attr, buff, cmd_size);
72 dbg("failed to write match_busid: %s", strerror(errno));
76 sysfs_close_attribute(match_busid_attr);