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/* $OpenBSD: parse_args.c,v 1.2 2010/04/18 15:09:00 miod Exp $ */
/*-
* Copyright (c) 1995 Theo de Raadt
*
* 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 ``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 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/param.h>
#include <sys/reboot.h>
#include <machine/prom.h>
#include <a.out.h>
#include "stand.h"
#include "libsa.h"
#define KERNEL_NAME "bsd"
int boothowto = 0;
/* skip end of token and whitespace */
static char *stws(char *);
static char *
stws(char *p)
{
while (*p != ' ' && *p != '\0')
p++;
while (*p == ' ')
p++;
return p;
}
int
parse_args(char *line, char **filep, int first)
{
char *s = NULL, *p;
char *name;
size_t namelen;
if (first == 0) {
/* recognize the special ``halt'' keyword */
if (strcmp(line, "halt") == 0)
return (1);
}
/*
* The command line should be under the form
* devtype(...)filename args
* such as
* inen()bsd -s
* and we only care about the kernel name here.
*
* However, if the kernel could not be loaded, and we asked the
* user, he may not give the devtype() part - especially since
* at the moment we only support inen() anyway.
*/
/* search for a set of braces */
for (p = line; *p != '\0' && *p != '('; p++) ;
if (*p != '\0') {
for (p = line; *p != '\0' && *p != ')'; p++) ;
if (*p != '\0')
s = ++p;
}
if (s == NULL)
s = line;
/* figure out how long the kernel name is */
for (p = s; *p != '\0' && *p != ' '; p++) ;
namelen = p - s;
/* empty, use the default */
if (namelen == 0)
name = KERNEL_NAME;
else {
name = (char *)alloc(1 + namelen);
if (name == NULL)
panic("out of memory");
bcopy(s, name, namelen);
name[namelen] = '\0';
}
*filep = name;
/*
* If this commandline is the one passed by the PROM, then look
* for options specific to the standalone code.
*/
if (first) {
p = stws(p);
while (*p != '\0') {
if (*p++ == '-')
while (*p != ' ' && *p != '\0')
switch (*p++) {
case 'z':
boothowto |= BOOT_ETHERNET_ZERO;
break;
}
p = stws(p);
}
}
return 0;
}
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