02-13-2006
suspend/restart a process in shell script
Hi,
I have a task that Im stuck on. I have an elementary script named 'myscript' that prints "the script is running" once a second. It runs for 27 seconds. I need to write a 2nd script that starts 'myscript' and takes a parameter '$1' for a number. my 2nd script then needs to pause myscript every $1 seconds for $1 seconds until myscript completes. myscript should not be 'aware' or 'listen' for anything.
I tried the wait command but it starts over instead of picking up where it left off. I looked at setting myscript as a background process, but again that doesnt seem like the solution as it wouldn't pause.
Please can someone explain what commands/approach they would use to solve my problem?
My only other thought would be to grep the process from ps as a looping condition, if it exists then put it to sleep (I dont think I can use the sleep command in this way though..?).
Thank you in advance for any help you can offer my noob self.
Best regards,
Dane Ensign
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LEARN ABOUT DEBIAN
shcomp
SHCOMP(1) User Environment Utilities SHCOMP(1)
NAME
shcomp - compile a ksh93 shell script
SYNOPSIS
shcomp [ options ] [infile] [outfile]]
ORIGIN OF THIS MAN PAGE
This man page was written by Christophe Martin <Schplurtz@free.fr> for the Debian GNU/Linux system. It is based on "shcomp --man" output.
DESCRIPTION
Unless -D is specified, shcomp takes a shell script, infile, and creates a binary format file, outfile, that ksh93 can read and execute
with the same effect as the original script.
Since aliases are processed as the script is read, alias definitions whose value requires variable expansion will not work correctly.
If -D is specified, all double quoted strings that are preceded by $ are output. These are the messages that need to be translated to
locale specific versions for internationalization.
If outfile is omitted, then the results will be written to standard output. If infile is also omitted, the shell script will be read from
standard input.
OPTIONS
-D, --dictionary
Generate a list of strings that need to be placed in a message catalog for internationalization.
-n, --noexec
Displays warning messages for obsolete or non-conforming constructs.
-v, --verbose
Displays input from infile onto standard error as it reads it.
--man Displays this man page on standard error and exits.
--help Shows a short help message and exits.
EXIT STATUS
0 Successful completion.
>0 An error occurred.
DEBIAN WARNING
On a Debian GNU/Linux system, more than one package may provide ksh. the output of shcomp can only be used by ksh93. Any other ksh will be
unable to run the compiled script.
EXAMPLE
( echo '#! /bin/ksh93' ; shcomp myscript ) > myscript.bin &&
chmod 755 myscript.bin
./myscript.bin
SEE ALSO
ksh(1)
IMPLEMENTATION
version shcomp (AT&T Labs Research) 2012-02-29
author David Korn <dgk@research.att.com>
copyright Copyright (c) 1982-2012 AT&T Intellectual Property
license http://www.eclipse.org/org/documents/epl-v10.html
KSH93 Fri Jun 3 2005 SHCOMP(1)