usbip_detach.c

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/*
 * Copyright (C) 2011 matt mooney <[email protected]>
 *               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 <sysfs/libsysfs.h>

#include <ctype.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <getopt.h>
#include <unistd.h>

#include "vhci_driver.h"
#include "usbip_common.h"
#include "usbip_network.h"
#include "usbip.h"

static const char usbip_detach_usage_string[] =
    "usbip detach <args>\n"
    "    -p, --port=<port>    " USBIP_VHCI_DRV_NAME
    " port the device is on\n";

void usbip_detach_usage(void)
{
    printf("usage: %s", usbip_detach_usage_string);
}

static int detach_port(char *port)
{
    int ret;
    uint8_t portnum;

    for (unsigned int i=0; i < strlen(port); i++)
        if (!isdigit(port[i])) {
            err("invalid port %s", port);
            return -1;
        }

    /* check max port */

    portnum = atoi(port);

    ret = usbip_vhci_driver_open();
    if (ret < 0) {
        err("open vhci_driver");
        return -1;
    }

    ret = usbip_vhci_detach_device(portnum);
    if (ret < 0)
        return -1;

    usbip_vhci_driver_close();

    return ret;
}

int usbip_detach(int argc, char *argv[])
{
    static const struct option opts[] = {
        { "port", required_argument, NULL, 'p' },
        { NULL, 0, NULL, 0 }
    };
    int opt;
    int ret = -1;

    for (;;) {
        opt = getopt_long(argc, argv, "p:", opts, NULL);

        if (opt == -1)
            break;

        switch (opt) {
        case 'p':
            ret = detach_port(optarg);
            goto out;
        default:
            goto err_out;
        }
    }

err_out:
    usbip_detach_usage();
out:
    return ret;
}