1 /* 2 * Copyright (C) 2011 matt mooney <mfm@muteddisk.com> 3 * 2005-2007 Takahiro Hirofuchi 4 * 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. 9 * 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. 14 * 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/>. 17 */ 18 19 #include <ctype.h> 20 #include <limits.h> 21 #include <stdint.h> 22 #include <stdio.h> 23 #include <stdlib.h> 24 #include <string.h> 25 26 #include <getopt.h> 27 #include <unistd.h> 28 29 #include "vhci_driver.h" 30 #include "usbip_common.h" 31 #include "usbip_network.h" 32 #include "usbip.h" 33 34 static const char usbip_detach_usage_string[] = 35 "usbip detach <args>\n" 36 " -p, --port=<port> " USBIP_VHCI_DRV_NAME 37 " port the device is on\n"; 38 39 void usbip_detach_usage(void) 40 { 41 printf("usage: %s", usbip_detach_usage_string); 42 } 43 44 static int detach_port(char *port) 45 { 46 int ret; 47 uint8_t portnum; 48 char path[PATH_MAX+1]; 49 50 unsigned int port_len = strlen(port); 51 52 for (unsigned int i = 0; i < port_len; i++) 53 if (!isdigit(port[i])) { 54 err("invalid port %s", port); 55 return -1; 56 } 57 58 /* check max port */ 59 60 portnum = atoi(port); 61 62 /* remove the port state file */ 63 64 snprintf(path, PATH_MAX, VHCI_STATE_PATH"/port%d", portnum); 65 66 remove(path); 67 rmdir(VHCI_STATE_PATH); 68 69 ret = usbip_vhci_driver_open(); 70 if (ret < 0) { 71 err("open vhci_driver"); 72 return -1; 73 } 74 75 ret = usbip_vhci_detach_device(portnum); 76 if (ret < 0) 77 return -1; 78 79 usbip_vhci_driver_close(); 80 81 return ret; 82 } 83 84 int usbip_detach(int argc, char *argv[]) 85 { 86 static const struct option opts[] = { 87 { "port", required_argument, NULL, 'p' }, 88 { NULL, 0, NULL, 0 } 89 }; 90 int opt; 91 int ret = -1; 92 93 for (;;) { 94 opt = getopt_long(argc, argv, "p:", opts, NULL); 95 96 if (opt == -1) 97 break; 98 99 switch (opt) { 100 case 'p': 101 ret = detach_port(optarg); 102 goto out; 103 default: 104 goto err_out; 105 } 106 } 107 108 err_out: 109 usbip_detach_usage(); 110 out: 111 return ret; 112 } 113