xref: /freebsd/stand/i386/libi386/devicename.c (revision 370e009188ba90c3290b1479aa06ec98b66e140a)
1 /*-
2  * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26 
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29 
30 #include <stand.h>
31 #include <string.h>
32 #include "bootstrap.h"
33 #include "disk.h"
34 #include "libi386.h"
35 
36 /*
37  * Point (dev) at an allocated device specifier for the device matching the
38  * path in (devspec). If it contains an explicit device specification,
39  * use that.  If not, use the default device.
40  */
41 int
42 i386_getdev(void **vdev, const char *devspec, const char **path)
43 {
44     struct devdesc **dev = (struct devdesc **)vdev;
45     int				rv;
46 
47     /*
48      * If it looks like this is just a path and no
49      * device, go with the current device.
50      */
51     if ((devspec == NULL) ||
52 	(devspec[0] == '/') ||
53 	(strchr(devspec, ':') == NULL)) {
54 
55 	if (((rv = devparse(dev, getenv("currdev"), NULL)) == 0) &&
56 	    (path != NULL))
57 		*path = devspec;
58 	return(rv);
59     }
60 
61     /*
62      * Try to parse the device name off the beginning of the devspec
63      */
64     return(devparse(dev, devspec, path));
65 }
66