On Tue, 01 Feb 2011 09:16:16 -0500, Gregory Seidman wrote:
> Now, those are the actual commands to run from the shell. You aren't
> going to get microsecond granularity that way.
FYI,
$ apt-cache show sleepenh
Package: sleepenh
Priority: extra
Section: universe/utils
Installed-Size: 60
Maintainer: Ubuntu MOTU Developers <ubuntu-motu@lists.ubuntu.com>
Original-Maintainer: Pedro Zorzenon Neto <pzn@debian.org>
Architecture: amd64
Version: 1.3-1
Depends: libc6 (>= 2.3.4)
Filename: pool/universe/s/sleepenh/sleepenh_1.3-1_amd64.deb
Size: 7526
MD5sum: 31d12f1bae42bd568535114ed397c4e5
SHA1: fa3a1f38fa7a3e456b4190dc6bbb4aa5b3bafae4
SHA256: 4105c3ef7dcf7014efb625d72dca95993d1a856d081e417bd379a0b66122fbff
Description: Sleep until a given date with subsecond resolution
sleepenh is an sleep program for using in shell scripts
that need to perform a loop that repeats at a regular
time interval, without cumulative errors.
.
It supports microsecond resolution.
.
You can also specify the time you need between two calls
of sleepenh.
.
Here follows an usage example to clarify its purpose. This
example sends 'A' to ttyS0 every 1.2 seconds.
#!/bin/sh
# does not wait (or wait 0), just to get initial timestamp
TIMESTAMP=`sleepenh 0`
while true; do
# send the byte to ttyS0
echo -n "A" > /dev/ttyS0;
# wait until the required time
TIMESTAMP=`sleepenh $TIMESTAMP 1.200`;
done
.
For more details, please read the manpage.
--
Tong (remove underscore(s) to reply)
http://xpt.sourceforge.net/techdocs/
http://xpt.sourceforge.net/tools/