install

unix系统下top命令的源代码

#!/bin/sh
#
# this shell script is amazingly similar to the old and lamented
# BSD "install" command.  It recognized the following options:
#
#	-o target file owner
#	-m target file mode
#	-g target file group owner
#
#
# scan the options
#
while [ $# -gt 0 ]; do
    case $1 in
      -o)
	owner=$2
	shift ; shift
	;;

      -m)
	mode=$2
	shift; shift
	;;

      -g)
	group=$2
	shift ; shift
	;;

      -*)
	echo "install: unknown option $1"
	exit
	;;

      *)
	break
	;;
    esac
done
#
# we need two more:  filename and destination
#
if [ $# -ne 2 ]; then
    echo "Usage:  install [ -o owner ] [ -m mode ] [ -g group ] file destination"
    exit
fi
#
# first, copy
#
cp $1 $2
#
# normalize the name
#
dest=$2
if [ -d $2 ]; then
    dest=$2/`basename $1`
fi
#
# do optional things
#
if [ "$owner" ]; then
    chown $owner $dest
fi
if [ "$group" ]; then
    chgrp $group $dest
fi
if [ "$mode" ]; then
    chmod $mode $dest
fi