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/* $NetBSD: parseutils.c,v 1.7 2014/01/05 20:52:57 jakllsch Exp $ */
/*
* Copyright (c) 1996, 1997
* Matthias Drochner. All rights reserved.
* Copyright (c) 1996, 1997
* Perry E. Metzger. All rights reserved.
* Copyright (c) 1997
* Jason R. Thorpe. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgements:
* This product includes software developed for the NetBSD Project
* by Matthias Drochner.
* This product includes software developed for the NetBSD Project
* by Perry E. Metzger.
* 4. The names of the authors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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 <lib/libkern/libkern.h>
#include <lib/libsa/stand.h>
#include <sys/boot_flag.h>
#include "libi386.h"
/*
* chops the head from the arguments and returns the arguments if any,
* or possibly an empty string.
*/
char *
gettrailer(char *arg)
{
char *options;
for (options = arg; *options; options++) {
switch (*options) {
case ' ':
case '\t':
*options++ = '\0';
break;
default:
continue;
}
break;
}
if (*options == '\0')
return options;
/* trim leading blanks/tabs */
while (*options == ' ' || *options == '\t')
options++;
return options;
}
int
parseopts(const char *opts, int *howto)
{
int r, tmpopt = 0;
opts++; /* skip - */
while (*opts) {
r = 0;
BOOT_FLAG(*opts, r);
if (r == 0) {
printf("-%c: unknown flag\n", *opts);
command_help(NULL);
return 0;
}
tmpopt |= r;
opts++;
if (*opts == ' ' || *opts == '\t') {
do
opts++; /* skip whitespace */
while (*opts == ' ' || *opts == '\t');
if (*opts == '-')
opts++; /* skip - */
else if (*opts != '\0') {
printf("invalid arguments\n");
command_help(NULL);
return 0;
}
}
}
*howto = tmpopt;
return 1;
}
int
parseboot(char *arg, char **filename, int *howto)
{
char *opts = NULL;
*filename = 0;
*howto = 0;
/* if there were no arguments */
if (!*arg)
return 1;
/* format is... */
/* [[xxNx:]filename] [-adqsv] */
/* check for just args */
if (arg[0] == '-')
opts = arg;
else {
/* there's a file name */
*filename = arg;
opts = gettrailer(arg);
if (!*opts)
opts = NULL;
else if (*opts != '-') {
printf("invalid arguments\n");
command_help(NULL);
return 0;
}
}
/* at this point, we have dealt with filenames. */
/* now, deal with options */
if (opts) {
if (parseopts(opts, howto) == 0)
return 0;
}
return 1;
}
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