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Top Forums UNIX for Dummies Questions & Answers Can cron be modified via a script? Post 302908661 by Corona688 on Wednesday 9th of July 2014 11:44:31 AM
Old 07-09-2014
The safest way is to have your script do it. [ -f /path/to/myscript-lock ] && exit 0

If you must edit cron automatically, I put a unique ID in the cron line to make it easy to match and difficult for a script to mistake.

Code:
0 * * * * /path/to/myscript.sh # 1234123132

This User Gave Thanks to Corona688 For This Post:
 

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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)
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