POSIX compliance... Post: 302976888

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Operating Systems OS X (Apple) POSIX compliance... Post 302976888 by wisecracker on Thursday 7th of July 2016 03:56:42 PM

07-07-2016

Registered User

Well I have been experimenting with sleep <secs> to give me a smaller time accurate to about + or - 5mS on this MacBook Pro, OSX 10.7.5.

It would be good enough for the Egg_Timer.sh and passes the ShellCheck test.

It is fully posix compliant with SLEEPs unity seconds timer only.

Boy am I gonna get some flak over this one, (yes I bend the rules a little)... ;o)

Code:

#!/bin/sh
# delay.sh <secs> <millisecs[0-999]>
secs="$1"
millisecs=$( awk -v mS="$2" -v correction=0.94 ' BEGIN { print (( mS / 2 ) * correction ); } ' )
millisecs="${millisecs%.*}"

# Accuracy on my MBP OSX 10.7.5 + or - 5mS of FSD.
mS()
{
	loop=0
	while [ "$loop" -le "$millisecs" ]
	do
		sleep 0
		wait
		loop=$(( loop + 1 ))
	done
}
# Test the mS function only.
time mS
sleep "$secs"

As I quoted in a previous post I could create a resonably accurate timer using 'afplay', 'aplay' or '/dev/dsp'. I might use afplay and make it Apple dedicated...

Thanks Don for the info...

I await the flak... ;o)

wisecracker

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LEARN ABOUT DEBIAN

nyancat

NYANCAT(1)						      General Commands Manual							NYANCAT(1)

NAME

       nyancat - terminal-based Pop Tart Cat animation

SYNOPSIS

       nyancat [ -hitn ] [-f frames]

DESCRIPTION

       nyancat is an animated, color, ANSI-text program that renders a loop of the classic Nyan Cat animation.

       nyancat makes use of various ANSI escape sequences to render color, or in the case of a VT220, simply dumps text to the screen.

OPTIONS

       -i, --intro
	      Show introduction / about information on startup.

       -t, --telnet
	      Enable telnet mode.

       -n, --no-counter
	      Do not display the timer.

       -s, --no-title
	      Do not set the titlebar text.

       -e, --no-clear
	      Do not clear the display between frames.

       -f, --frames
	      Display the requested number of frames, then quit.

       -r, --min-rows
	      Crop the animation from the top.

       -R, --max-rows
	      Crop the animation from the bottom.

       -c, --min-cols
	      Crop the animation from the left.

       -C, --max-cols
	      Crop the animation from the right.

       -W, --width
	      Crop the animation to the given width.

       -H, --height
	      Crop the animation to the given height.

       -h, --help
	      Show help message and exit.

HOMEPAGE

       Homepage: http://miku.acm.uiuc.edu/

       Repository: https://github.com/klange/nyancat

AUTHOR

       nyancat was written by Kevin Lange.

       This manual page was written by Jonathan McCrohan <jmccrohan@gmail.com>, for the Debian project (and may be used by others).

								     May, 2012								NYANCAT(1)