/* * vivi/drivers/serial/getcmd.c * * Based on bootldr/bootldr.c * * Author: Janghoon Lyu <nandy@mizi.com> * Date  : $Date: 2002/08/20 08:17:09 $ * * $Revision: 1.1 $ */#include <config.h>#include <serial.h>#include "getcmd.h"void getcmd(char *cmd_buf, unsigned int len){	char curpos = 0;	/* current position - index into cmd_buf */	char c;	int cmd_echo = 1;	/* Clear out the buffer */	memset(cmd_buf, 0, MAX_CMDBUF_SIZE);	for (;;) {		c = getc();		switch (c) {		case 0x08:		case 0x06:		case 0x07:		case 0x7E:		case 0x7F:	/* backspace or delete */			/* we're not at the beginning of the line */			if (curpos) {				curpos--;				putc(0x08);	/* go backwards */				putc(' ');	/* overwrite the char */				putc(0x08);	/* go back again */			}			cmd_buf[curpos] = '\0';			break;		case '\r':		case '\n':		case '\0':			putc('\r');			putc('\n');			goto end_cmd;		case CTL_CH('x'):			curpos = 0;			break;		default:			if (curpos < MAX_CMDBUF_SIZE) {				cmd_buf[curpos] = c;				/* echo it back out to the screen */				if (cmd_echo)					putc(c);				curpos++;			}			break;		}	}end_cmd:	DPRINTK("COMMAND: %s\n", cmd_buf);}