TnSb/doasedit
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use trap to properly cleanup temporary files

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This commit is contained in:
Joel Beckmeyer 2021-02-03 17:23:53 -05:00
parent 3ec27a66b4
commit 0008abdc23
1 changed files with 4 additions and 2 deletions
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6
doasedit
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@ -10,7 +10,7 @@ elif [ "$EUID" -eq 0 ]; then
exit 1 exit 1
fi fi
set -euo pipefail set -Eeuo pipefail
destfile_pfx="$(cat /dev/urandom | tr -cd 'a-f0-9' | head -c 32)" || true destfile_pfx="$(cat /dev/urandom | tr -cd 'a-f0-9' | head -c 32)" || true
@ -21,6 +21,7 @@ done
tempdir="/tmp/doasedit/$destfile_pfx" tempdir="/tmp/doasedit/$destfile_pfx"
mkdir -p $tempdir mkdir -p $tempdir
trap "rm -rf $tempdir" EXIT
srcfile="$(doas realpath $1)" srcfile="$(doas realpath $1)"
if doas [ -f "$srcfile" ]; then if doas [ -f "$srcfile" ]; then
@ -39,8 +40,9 @@ cat $tempdir/edit | doas tee $tempdir/file 1>/dev/null
if cmp -s "$tempdir/file" "$srcfile"; then if cmp -s "$tempdir/file" "$srcfile"; then
echo "Skipping write; no changes." echo "Skipping write; no changes."
exit 0
else else
doas mv -f $tempdir/file $srcfile doas mv -f $tempdir/file $srcfile
exit 0
fi fi
rm -rf $tempdir