ash/stty usage

[James Simmons]

On Fri, 13 Jun 2008, Denys Vlasenko wrote:

> On Thursday 12 June 2008 22:59, James Simmons wrote:
> > 
> > > > Hi!
> > > > 
> > > >    I'm attempting color text but I'm getting "K[37;1mTextK[31;1m". Any 
> > > > idea what is wrong?
> > > 
> > > What do you do to get it?
> > 
> > echo "IP address <$ip>"
> 
> Well, I meant "give me means to reproduce your case" :)

Here you go. In bash the text is:
  Software version: 1.0.0

In ash it prints: 
 Software version: K[37;1m1.0.0K[37;0m

#!/busybox-1.6.1/_install/bin/sh

_reset='\033[0m'
_black='\033[30;00m'
_grey='\033[37;0m'
_dgrey='\033[30;1m'
_white='\033[37;1m'
_red='\033[31;1m'
_dred='\033[31;0m'
_green='\033[32;1m'
_dgreen='\033[32;0m'
_yellow='\033[33;1m'
_brown='\033[33;0m'
_blue='\033[34;1m'
_dblue='\033[34;0m'
_magenta='\033[35;1m'
_dmagenta='\033[35;0m'
_cyan='\033[36;1m'
_dcyan='\033[36;0m'

color() {
        local c="$1"
        local name

        case "$c" in
        ""|default)     c=grey ;;
        grey)           ;;
        dgrey)          ;;
        white)          ;;
        red)            ;;
        dred)           ;;
        green)          ;;
        dgreen)         ;;
        yellow)         ;;
        brown)          ;;
        blue)           ;;
        dblue)          ;;
        magenta)        ;;
        dmagenta)       ;;
        cyan)           ;;
        dcyan)          ;;
        *)              return 1 ;;
        esac

        name="_${c}"
        CURRENT_COLOR="$c"
        eval CURRENT_COLOR_ESC=\"\$${name}\"
        echo -en "${CURRENT_COLOR_ESC}"
}

echo_with_bold() {
	[ -n "$CURRENT_COLOR_ESC" ] || color default
	local tmp="$2"
	tmp=${tmp//</${1}}
	tmp=${tmp//>/${CURRENT_COLOR_ESC}}
	echo -e "${tmp}"
}

VERSION=1.0.0
ver_color=${_white}
text="Software version: <${VERSION}>"
echo_with_bold "${ver_color}" " ${text}"

> > > > Also I'm looking to flush the tty. Currently I'm doing 
> > > > 
> > > > Do you know of a better way?
> > > 
> > > Don't know for sure, maybe this?
> > > 
> > > int tcflush(int fd, int queue_selector);
> > 
> > I was hoping some app in busybox did that in some way. Will search for 
> > tools to do that.
> 
> If you can confirm that the above code works for you
> as a tiny standalone executable, it can be added to busybox.

Hum. I'm going to dig into this some more. There must be a terminal 
control code to flush the buffer. Prehaps ^O to the terminal.