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#!/usr/bin/env bash
#
# sue(8) -- Run sudoedit(8) with an appropriate user on a set of files
#
# Author: Tom Ryder
# Copyright: 2015
# License: Public domain
#
# Name self
self=sue
# Define a function to show usage
usage() {
printf 'USAGE: %s FILE1 [FILE2 ...]\n' \
"$self"
}
# Test the first argument
case $1 in
# Give help on stdout if requested
-h|--help|-\?)
usage
exit
;;
# If no file was given, give help on stderr and bail
'')
usage >&2
exit 1
;;
esac
# Iterate through the files and check they all have the same owner
user=
for file ; do
# Use stat(1) to get the file owner
if ! file_owner=$(stat -c %U -- "$file") ; then
printf '%s: Failed to run stat(1) on file %s\n' \
"$self" "$file" >&2
exit 1
fi
# If this is the first file, we'll use its owner as our user
if [[ -z $user ]] ; then
user=$file_owner
# If not, and the user we're going to use and this file's owner don't
# match, bail with an error
elif [[ $user != $file_owner ]] ; then
printf '%s: Files do not share a common owner\n' \
"$self" >&2
exit 1
fi
done
# If we got this far, there's at least one file and all the files are owned by
# the same user; we can safely edit them
exec sudoedit -u "$user" -- "$@"
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