xref: /freebsd/stand/userboot/userboot/devicename.c (revision 910de60a7e43c593b5126b2f1ee468c089c8116e)

/*-
 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <stand.h>
#include <string.h>

#include "bootstrap.h"
#include "disk.h"
#include "libuserboot.h"

/*
 * Point (dev) at an allocated device specifier for the device matching the
 * path in (devspec). If it contains an explicit device specification,
 * use that.  If not, use the default device.
 */
int
userboot_getdev(void **vdev, const char *devspec, const char **path)
{
	struct devdesc **dev = (struct devdesc **)vdev;
	int rv;

	/*
	 * If it looks like this is just a path and no
	 * device, go with the current device.
	 */
	if ((devspec == NULL) ||
	    (devspec[0] == '/') ||
	    (strchr(devspec, ':') == NULL)) {

		rv = devparse(dev, getenv("currdev"), NULL);
		if (rv == 0 && path != NULL)
			*path = devspec;
		return (rv);
	}

	/*
	 * Try to parse the device name off the beginning of the devspec
	 */
	return (devparse(dev, devspec, path));
}

/*
 * Set currdev to suit the value being supplied in (value)
 */
int
userboot_setcurrdev(struct env_var *ev, int flags, const void *value)
{
	struct devdesc *ncurr;
	int rv;

	if ((rv = devparse(&ncurr, value, NULL)) != 0)
		return (rv);
	free(ncurr);

	return (mount_currdev(ev, flags, value));
}