Help to enchance unix tool..

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# 8  
Old 12-18-2007
Some operating systems support Access Control Lists but they are really glorified permissions, it won't solve your requirement.
# 9  
Old 12-18-2007
in my opinion, you need to tell all people not to edit those files directly, and provide them access to your tools using which they can do the required editing (if your tools are good enough, then they may quit their old habits and start using the tools)

if you are going ahead with fcntl, this is a good place to visit
# 10  
Old 12-23-2007
Comon workaround

Since mandatory file locking in *nix is somewhat, well, borked , you could use the common kludge of an independent lockfile for exclusive access per file. The trick there is
making bulletproof the removal of the same based on client behavior, implementing a timed wait, etc..Not impossible, but challenging.
# 11  
Old 12-23-2007
Could some lateral thinking work?

Perhaps you could save the file encrypted, so that editing it has to be a 2-stage process.
Of course, your would have to decrypt it for use too.

Alternatively, you could secure the file so it could not be edited, and then use sudo to access it.
If you did a wrapper on the front, then that could take care of locking.

Another option would be to use NFS to share the file, and then mount it back with extra controls.

Or perhaps you could make the control files binary, so that they need a front-end of your choice to edit.

Or maybe a version control system (eg. RCS) could be used to check in and out the file.

But at the end of the day, essentially you've got a security situation - directory and file permissions should be set so that only designated and authorised persons have access to (view/edit) files, and anything that circumvents this is badly designed and/or implemented.
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