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
usbip_detach_usage(void)39 void usbip_detach_usage(void)
40 {
41 printf("usage: %s", usbip_detach_usage_string);
42 }
43
detach_port(char * port)44 static int detach_port(char *port)
45 {
46 int ret;
47 uint8_t portnum;
48 char path[PATH_MAX+1];
49
50 for (unsigned int i = 0; i < strlen(port); i++)
51 if (!isdigit(port[i])) {
52 err("invalid port %s", port);
53 return -1;
54 }
55
56 /* check max port */
57
58 portnum = atoi(port);
59
60 /* remove the port state file */
61
62 snprintf(path, PATH_MAX, VHCI_STATE_PATH"/port%d", portnum);
63
64 remove(path);
65 rmdir(VHCI_STATE_PATH);
66
67 ret = usbip_vhci_driver_open();
68 if (ret < 0) {
69 err("open vhci_driver");
70 return -1;
71 }
72
73 ret = usbip_vhci_detach_device(portnum);
74 if (ret < 0)
75 return -1;
76
77 usbip_vhci_driver_close();
78
79 return ret;
80 }
81
usbip_detach(int argc,char * argv[])82 int usbip_detach(int argc, char *argv[])
83 {
84 static const struct option opts[] = {
85 { "port", required_argument, NULL, 'p' },
86 { NULL, 0, NULL, 0 }
87 };
88 int opt;
89 int ret = -1;
90
91 for (;;) {
92 opt = getopt_long(argc, argv, "p:", opts, NULL);
93
94 if (opt == -1)
95 break;
96
97 switch (opt) {
98 case 'p':
99 ret = detach_port(optarg);
100 goto out;
101 default:
102 goto err_out;
103 }
104 }
105
106 err_out:
107 usbip_detach_usage();
108 out:
109 return ret;
110 }
111