| /* |
| * Copyright (C) 2011 matt mooney <mfm@muteddisk.com> |
| * 2005-2007 Takahiro Hirofuchi |
| * |
| * This program is free software: you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation, either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <sysfs/libsysfs.h> |
| |
| #include <errno.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "usbip_common.h" |
| #include "utils.h" |
| |
| int modify_match_busid(char *busid, int add) |
| { |
| char bus_type[] = "usb"; |
| char attr_name[] = "match_busid"; |
| char buff[SYSFS_BUS_ID_SIZE + 4]; |
| char sysfs_mntpath[SYSFS_PATH_MAX]; |
| char match_busid_attr_path[SYSFS_PATH_MAX]; |
| struct sysfs_attribute *match_busid_attr; |
| int rc, ret = 0; |
| |
| if (strnlen(busid, SYSFS_BUS_ID_SIZE) > SYSFS_BUS_ID_SIZE - 1) { |
| dbg("busid is too long"); |
| return -1; |
| } |
| |
| rc = sysfs_get_mnt_path(sysfs_mntpath, SYSFS_PATH_MAX); |
| if (rc < 0) { |
| err("sysfs must be mounted: %s", strerror(errno)); |
| return -1; |
| } |
| |
| snprintf(match_busid_attr_path, sizeof(match_busid_attr_path), |
| "%s/%s/%s/%s/%s/%s", sysfs_mntpath, SYSFS_BUS_NAME, bus_type, |
| SYSFS_DRIVERS_NAME, USBIP_HOST_DRV_NAME, attr_name); |
| |
| match_busid_attr = sysfs_open_attribute(match_busid_attr_path); |
| if (!match_busid_attr) { |
| dbg("problem getting match_busid attribute: %s", |
| strerror(errno)); |
| return -1; |
| } |
| |
| if (add) |
| snprintf(buff, SYSFS_BUS_ID_SIZE + 4, "add %s", busid); |
| else |
| snprintf(buff, SYSFS_BUS_ID_SIZE + 4, "del %s", busid); |
| |
| dbg("write \"%s\" to %s", buff, match_busid_attr->path); |
| |
| rc = sysfs_write_attribute(match_busid_attr, buff, sizeof(buff)); |
| if (rc < 0) { |
| dbg("failed to write match_busid: %s", strerror(errno)); |
| ret = -1; |
| } |
| |
| sysfs_close_attribute(match_busid_attr); |
| |
| return ret; |
| } |