root/bin/in_place @ 9870
| 1 |
#!/bin/sh -e
|
|---|---|
| 2 |
# Runs a stream command on a file
|
| 3 |
# Usage: self file command
|
| 4 |
|
| 5 |
file="$1" |
| 6 |
shift
|
| 7 |
|
| 8 |
test "$#" -ge 1 || exit 0 # no command to run |
| 9 |
|
| 10 |
temp="$(tempfile)" |
| 11 |
onExit () { rm -f "$temp"; } |
| 12 |
trap onExit EXIT
|
| 13 |
|
| 14 |
"$@" <"$file" >"$temp" # exits on error so file not updated |
| 15 |
diff "$file" "$temp" >/dev/null && exit # don't update file if no change |
| 16 |
case "$(uname)" in Linux) chmod --reference="$file" "$temp";; esac |
| 17 |
mv "$temp" "$file" |