[PATCH] Use printf(1) builtin for hexprint function in etc/network.subr

Devin Teske dteske at vicor.com
Sun May 8 18:59:32 UTC 2011


On May 8, 2011, at 5:37 AM, Jilles Tjoelker wrote:

> Now that printf(1) is a shell builtin, there is no need to emulate it
> anymore.

Did you realize that when you committed printf(1) back to the sh(1) Makefile, you were about 28 hours away from the 9 year anniversary of when knu removed it. knu removed printf(1) from the sh(1) makefile on Nov 20th, 2001, and you brought it back on Nov 19th, 2010. According to:

	http://www.freebsd.org/cgi/cvsweb.cgi/src/bin/sh/Makefile


Hallelujah!! Thank you so much for bringing printf(1) back as a builtin! Anytime you're near San Francisco, I'll buy you a beer (seriously... _thank_ _you_).
-- 
Cheers,
Devin


> 
> It may be faster to use printf directly but the function is useful for
> compatibility.
> 
> Index: etc/network.subr
> ===================================================================
> --- etc/network.subr	(revision 220966)
> +++ etc/network.subr	(working copy)
> @@ -1333,38 +1333,14 @@
> #	Echo decimal number $arg (single digit) in hexadecimal format.
> hexdigit()
> {
> -	if [ $1 -lt 10 ]; then
> -		echo $1
> -	else
> -		case $1 in
> -		10)	echo a ;;
> -		11)	echo b ;;
> -		12)	echo c ;;
> -		13)	echo d ;;
> -		14)	echo e ;;
> -		15)	echo f ;;
> -		esac
> -	fi
> +	printf '%x\n' "$1"
> }
> 
> # hexprint arg
> #	Echo decimal number $arg (multiple digits) in hexadecimal format.
> hexprint()
> {
> -	local val str dig
> -	val=$1
> -	str=''
> -	dig=`hexdigit $((${val} & 15))`
> -	str=${dig}${str}
> -	val=$((${val} >> 4))
> -
> -	while [ ${val} -gt 0 ]; do
> -		dig=`hexdigit $((${val} & 15))`
> -		str=${dig}${str}
> -		val=$((${val} >> 4))
> -	done
> -
> -	echo ${str}
> +	printf '%x\n' "$1"
> }
> 
> is_wired_interface()
> 
> -- 
> Jilles Tjoelker
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-- 
Cheers,
Devin Teske

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