mdw@git.distorted.org.uk Git - misc/blob - create

   1 #! /bin/sh
   2
   3 set -e
   4 case "$#:$1" in
   5   0:* | 1:-h | 1:--help)
   6     echo "$0 FILE PROG ARGS"
   7     echo "  Run PROG with ARGS, writing its stdout to FILE if it succeeds."
   8     echo "  Clobbers FILE.new."
   9     exit 0
  10     ;;
  11   1:*)
  12     echo >&2 "$0 FILE PROG ARGS"
  13     exit 1
  14     ;;
  15 esac
  16 file=$1; shift
  17 set +e; "$@" >"$file.new"; st=$?; set -e
  18 if [ $st -eq 0 ]; then
  19   mv "$file.new" "$file"
  20 else
  21   rm "$file.new"
  22 fi
  23 exit $st