Determine if a file is writable by a Bourne script user

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From the computer of: Rex (39 recipes)
Created: Oct 20, 2003


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From a Bourne shell script (sh, ksh, bash, ...), it is possible to test if a file exists and is writable by the user running the script.

if [ -w testfile ]
then
  echo testfile is writable!
else
  echo non writable...
fi

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