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#!/bin/sh
# Convert an ls-style permission string, like drwxr----x and -rw-r-x-wx
# to the equivalent chmod --mode (-m) argument, (=,u=rwx,g=r,o=x and
# =,u=rw,g=rx,o=wx).
# FIXME: handle special bits, too.
case $# in
1) rwx=$1;;
*) echo "$0: wrong number of arguments" 1>&2
echo "Usage: $0 ls-style-mode-string" 1>&2
exit 1;;
esac
case $rwx in
[ld-][rwx-][rwx-][rwxs-][rwx-][rwx-][rwxs-][rwx-][rwx-][rwxt-]) ;;
*) echo "$0: invalid mode string: $rwx";;
esac
u=`echo $rwx|sed 's/^.\(...\).*/,u=\1/;s/-//g;s/^,u=$//'`
g=`echo $rwx|sed 's/^....\(...\).*/,g=\1/;s/-//g;s/^,g=$//'`
o=`echo $rwx|sed 's/^.......\(...\).*/,o=\1/;s/-//g;s/^,o=$//'`
echo "=$u$g$o"
exit 0
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