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/*
* Copyright (c) 1996 The University of Utah and
* the Computer Systems Laboratory at the University of Utah (CSL).
* All rights reserved.
*
* Permission to use, copy, modify and distribute this software is hereby
* granted provided that (1) source code retains these copyright, permission,
* and disclaimer notices, and (2) redistributions including binaries
* reproduce the notices in supporting documentation, and (3) all advertising
* materials mentioning features or use of this software display the following
* acknowledgement: ``This product includes software developed by the
* Computer Systems Laboratory at the University of Utah.''
*
* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* CSL requests users of this software to return to csl-dist@cs.utah.edu any
* improvements that they make and grant CSL redistribution rights.
*/
#include <boot/multiboot.h>
#include <boot/util.h>
#include <kvmphys.h>
#include <stdlib/ctype.h>
#include <stdlib/stdlib.h>
#include <string/string.h>
#include <malloc/malloc_internal.h>
/* Note that this system uses _malloc to grab memory before the whole
* environment is up and running.
*
* Requires that malloc_lmm is initialized somehow (see mb_util_lmm).
*/
static char prog_name[] = "kernel";
static char *null_args[2] = {prog_name, 0};
static const char delim[] = " \f\n\r\t\v";
void mb_util_cmdline(mbinfo_t *mbi, int *argc, char ***argv, char ***envp)
{
if (mbi->flags & MULTIBOOT_CMDLINE)
{
char *cl = (char*)phystokv(mbi->cmdline);
unsigned cllen = strlen(cl);
char *targ[1 + cllen], *tvar[cllen];
unsigned narg = 0, nvar = 0;
char *tok;
/* Parse out the tokens in the command line.
XXX Might be good to handle quotes. */
for (tok = strtok(cl, delim); tok; tok = strtok(0, delim))
{
if (strchr(tok, '='))
tvar[nvar++] = tok;
else
targ[narg++] = tok;
}
/* Copy the pointer arrays to permanent heap memory. */
*argv = _malloc(sizeof(char*) * (narg + nvar + 2));
if (!*argv) panic("No memory to parse command line");
memcpy(*argv, targ, sizeof(char*) * narg);
(*argv)[narg] = 0;
*argc = narg;
*envp = &((*argv)[narg+1]);
memcpy(*envp, tvar, sizeof(char*) * nvar);
(*envp)[nvar] = 0;
}
else
{
/* No command line. */
*argc = 1;
*argv = null_args;
*envp = null_args + 1;
}
}
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