/*
* Copyright 2001, 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
/*
* Open the "device" named by the combined file system/file name
* given as the fname arg. Format is:
*
* nfs:netbsd
* tftp:netbsd
* netbsd
*
* If no file system is specified, we default to the first in the
* file system table (which ought to be NFS).
*
* We always open just one device (the PXE netif).
*/
int
devopen(struct open_file *f, const char *fname, char **file)
{
struct devsw *dp;
char *filename;
size_t fsnamelen;
int i, error;
dp = &devsw[0];
/* Set the default boot file system. */
memcpy(file_system, pxeboot_fstab[0].fst_ops, sizeof(struct fs_ops));
/* if we got passed a filename, pass it to the BOOTP server */
if (fname)
strncpy(bootfile, fname, FNAME_SIZE);
/* Open the device; this might give us a boot file name. */
error = (*dp->dv_open)(f, NULL);
if (error)
return (error);
f->f_dev = dp;
/*
* If the DHCP server provided a file name:
* - If it contains a ":", assume it points to a NetBSD kernel.
* - If not, assume that the DHCP server was not able to pass
* a separate filename for the kernel. (The name probably
* was the same as used to load "pxeboot".) Ignore it and
* use the default in this case.
* So we cater to simple DHCP servers while being able to
* use the power of conditional behaviour in modern ones.
*/
if (strchr(bootfile, ':'))
fname = bootfile;
filename = (fname ? strchr(fname, ':') : NULL);
if (filename != NULL) {
fsnamelen = (size_t)((const char *)filename - fname);
for (i = 0; i < npxeboot_fstab; i++) {
if (strncmp(fname, pxeboot_fstab[i].fst_name,
fsnamelen) == 0) {
memcpy(file_system, pxeboot_fstab[i].fst_ops,
sizeof(struct fs_ops));
break;
}
}
if (i == npxeboot_fstab) {
printf("Invalid file system type specified in %s\n",
fname);
error = EINVAL;
goto bad;
}
filename++;
if (filename[0] == '\0') {
printf("No file specified in %s\n", fname);
error = EINVAL;
goto bad;
}
} else
filename = (char *)fname;
