tools/usb/usbip/src/usbip.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * command structure borrowed from udev
   4  * (git://git.kernel.org/pub/scm/linux/hotplug/udev.git)
   5  *
   6  * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
   7  *               2005-2007 Takahiro Hirofuchi
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12
  13 #include <getopt.h>
  14 #include <syslog.h>
  15
  16 #include "usbip_common.h"
  17 #include "usbip_network.h"
  18 #include "usbip.h"
  19
  20 static int usbip_help(int argc, char *argv[]);
  21 static int usbip_version(int argc, char *argv[]);
  22
  23 static const char usbip_version_string[] = PACKAGE_STRING;
  24
  25 static const char usbip_usage_string[] =
  26         "usbip [--debug] [--log] [--tcp-port PORT] [version]\n"
  27         "             [help] <command> <args>\n";
  28
  29 static void usbip_usage(void)
  30 {
  31         printf("usage: %s", usbip_usage_string);
  32 }
  33
  34 struct command {
  35         const char *name;
  36         int (*fn)(int argc, char *argv[]);
  37         const char *help;
  38         void (*usage)(void);
  39 };
  40
  41 static const struct command cmds[] = {
  42         {
  43                 .name  = "help",
  44                 .fn    = usbip_help,
  45                 .help  = NULL,
  46                 .usage = NULL
  47         },
  48         {
  49                 .name  = "version",
  50                 .fn    = usbip_version,
  51                 .help  = NULL,
  52                 .usage = NULL
  53         },
  54         {
  55                 .name  = "attach",
  56                 .fn    = usbip_attach,
  57                 .help  = "Attach a remote USB device",
  58                 .usage = usbip_attach_usage
  59         },
  60         {
  61                 .name  = "detach",
  62                 .fn    = usbip_detach,
  63                 .help  = "Detach a remote USB device",
  64                 .usage = usbip_detach_usage
  65         },
  66         {
  67                 .name  = "list",
  68                 .fn    = usbip_list,
  69                 .help  = "List exportable or local USB devices",
  70                 .usage = usbip_list_usage
  71         },
  72         {
  73                 .name  = "bind",
  74                 .fn    = usbip_bind,
  75                 .help  = "Bind device to " USBIP_HOST_DRV_NAME ".ko",
  76                 .usage = usbip_bind_usage
  77         },
  78         {
  79                 .name  = "unbind",
  80                 .fn    = usbip_unbind,
  81                 .help  = "Unbind device from " USBIP_HOST_DRV_NAME ".ko",
  82                 .usage = usbip_unbind_usage
  83         },
  84         {
  85                 .name  = "port",
  86                 .fn    = usbip_port_show,
  87                 .help  = "Show imported USB devices",
  88                 .usage = NULL
  89         },
  90         { NULL, NULL, NULL, NULL }
  91 };
  92
  93 static int usbip_help(int argc, char *argv[])
  94 {
  95         const struct command *cmd;
  96         int i;
  97         int ret = 0;
  98
  99         if (argc > 1 && argv++) {
 100                 for (i = 0; cmds[i].name != NULL; i++)
 101                         if (!strcmp(cmds[i].name, argv[0]) && cmds[i].usage) {
 102                                 cmds[i].usage();
 103                                 goto done;
 104                         }
 105                 ret = -1;
 106         }
 107
 108         usbip_usage();
 109         printf("\n");
 110         for (cmd = cmds; cmd->name != NULL; cmd++)
 111                 if (cmd->help != NULL)
 112                         printf("  %-10s %s\n", cmd->name, cmd->help);
 113         printf("\n");
 114 done:
 115         return ret;
 116 }
 117
 118 static int usbip_version(int argc, char *argv[])
 119 {
 120         (void) argc;
 121         (void) argv;
 122
 123         printf(PROGNAME " (%s)\n", usbip_version_string);
 124         return 0;
 125 }
 126
 127 static int run_command(const struct command *cmd, int argc, char *argv[])
 128 {
 129         dbg("running command: `%s'", cmd->name);
 130         return cmd->fn(argc, argv);
 131 }
 132
 133 int main(int argc, char *argv[])
 134 {
 135         static const struct option opts[] = {
 136                 { "debug",    no_argument,       NULL, 'd' },
 137                 { "log",      no_argument,       NULL, 'l' },
 138                 { "tcp-port", required_argument, NULL, 't' },
 139                 { NULL,       0,                 NULL,  0  }
 140         };
 141
 142         char *cmd;
 143         int opt;
 144         int i, rc = -1;
 145
 146         usbip_use_stderr = 1;
 147         opterr = 0;
 148         for (;;) {
 149                 opt = getopt_long(argc, argv, "+dlt:", opts, NULL);
 150
 151                 if (opt == -1)
 152                         break;
 153
 154                 switch (opt) {
 155                 case 'd':
 156                         usbip_use_debug = 1;
 157                         break;
 158                 case 'l':
 159                         usbip_use_syslog = 1;
 160                         openlog("", LOG_PID, LOG_USER);
 161                         break;
 162                 case 't':
 163                         usbip_setup_port_number(optarg);
 164                         break;
 165                 case '?':
 166                         printf("usbip: invalid option\n");
 167                         /* Terminate after printing error */
 168                         /* FALLTHRU */
 169                 default:
 170                         usbip_usage();
 171                         goto out;
 172                 }
 173         }
 174
 175         cmd = argv[optind];
 176         if (cmd) {
 177                 for (i = 0; cmds[i].name != NULL; i++)
 178                         if (!strcmp(cmds[i].name, cmd)) {
 179                                 argc -= optind;
 180                                 argv += optind;
 181                                 optind = 0;
 182                                 rc = run_command(&cmds[i], argc, argv);
 183                                 goto out;
 184                         }
 185         }
 186
 187         /* invalid command */
 188         usbip_help(0, NULL);
 189 out:
 190         return (rc > -1 ? EXIT_SUCCESS : EXIT_FAILURE);
 191 }