89 lines
2.9 KiB
C
89 lines
2.9 KiB
C
|
/*
|
||
|
|
* This file is part of the libpayload project.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2008 coresystems GmbH
|
||
|
|
*
|
||
|
|
* 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. The name of the author 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @file libc/readline.c
|
||
|
|
* Simple readline implementation
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <libpayload.h>
|
||
|
|
#include <getopt.h>
|
||
|
|
|
||
|
|
/* We don't want to waste malloc on this, so we live with a small
|
||
|
|
* fixed size array
|
||
|
|
*/
|
||
|
|
char *string_argv[MAX_ARGS];
|
||
|
|
int string_argc;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Take a string and make char *argv[] and int argc from it.
|
||
|
|
*
|
||
|
|
* This function allows the user to use getopt on an arbitrary string.
|
||
|
|
*
|
||
|
|
* global variables valid after a successful run of string_to_args():
|
||
|
|
* string_argc pointer to number of arguments
|
||
|
|
* string_argv pointer to argument list.
|
||
|
|
*
|
||
|
|
* @param caller to be used as argv[0] (may be NULL to ignore)
|
||
|
|
* @param string to process
|
||
|
|
* @return 0 if no error occured.
|
||
|
|
*/
|
||
|
|
int string_to_args(char *caller, char *string)
|
||
|
|
{
|
||
|
|
int i = 0;
|
||
|
|
|
||
|
|
if (caller)
|
||
|
|
string_argv[i++] = caller;
|
||
|
|
|
||
|
|
if (*string)
|
||
|
|
string_argv[i++] = string;
|
||
|
|
|
||
|
|
/* Terminate if the string ends */
|
||
|
|
while (string && *string) {
|
||
|
|
/* whitespace occured? */
|
||
|
|
if ((*string == ' ') || (*string == '\t')) {
|
||
|
|
/* skip all whitespace (and null it) */
|
||
|
|
while (*string == ' ' || *string == '\t')
|
||
|
|
*string++ = 0;
|
||
|
|
/* if our ugly static array is big enough, store
|
||
|
|
* argument to string_argv[]
|
||
|
|
*/
|
||
|
|
if (i < MAX_ARGS)
|
||
|
|
string_argv[i++] = string;
|
||
|
|
}
|
||
|
|
string++;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* prevent array from overflowing */
|
||
|
|
string_argc = (i <= MAX_ARGS) ? i : MAX_ARGS;
|
||
|
|
|
||
|
|
/* and return whether there was an overflow */
|
||
|
|
return (i <= MAX_ARGS) ? 0 : 1;
|
||
|
|
}
|