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