text: /*
   * 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 <errno.h>
  #include <stdio.h>
  #include <string.h>
  
  #include "usbip_common.h"
  #include "utils.h"
  #include "sysfs_utils.h"
  
  int modify_match_busid(char *busid, int add)
  {
  	char attr_name[] = "match_busid";
  	char command[SYSFS_BUS_ID_SIZE + 4];
  	char match_busid_attr_path[SYSFS_PATH_MAX];
  	int rc;
  	int cmd_size;
  
  	snprintf(match_busid_attr_path, sizeof(match_busid_attr_path),
  		 "%s/%s/%s/%s/%s/%s", SYSFS_MNT_PATH, SYSFS_BUS_NAME,
  		 SYSFS_BUS_TYPE, SYSFS_DRIVERS_NAME, USBIP_HOST_DRV_NAME,
  		 attr_name);
  
  	if (add)
  		cmd_size = snprintf(command, SYSFS_BUS_ID_SIZE + 4, "add %s",
  				    busid);
  	else
  		cmd_size = snprintf(command, SYSFS_BUS_ID_SIZE + 4, "del %s",
  				    busid);
  
  	rc = write_sysfs_attribute(match_busid_attr_path, command,
  				   cmd_size);
  	if (rc < 0) {
  		dbg("failed to write match_busid: %s", strerror(errno));
  		return -1;
  	}
  
  	return 0;
  }
  