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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). Ignore ACLs.
# Copyright (C) 2000, 2005 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
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-][rwxsS-][rwx-][rwx-][rwxsS-][rwx-][rwx-][rwxtT-]) ;;
[ld-][rwx-][rwx-][rwxsS-][rwx-][rwx-][rwxsS-][rwx-][rwx-][rwxtT-]+) ;;
*) echo "$0: invalid mode string: $rwx" 1>&2; exit 1;;
esac
# Perform these conversions:
# S s
# s xs
# T t
# t xt
# The `T' and `t' ones are only valid for `other'.
s='s/S/@/;s/s/x@/;s/@/s/'
t='s/T/@/;s/t/x@/;s/@/t/'
u=`echo $rwx|sed 's/^.\(...\).*/,u=\1/;s/-//g;s/^,u=$//;'$s`
g=`echo $rwx|sed 's/^....\(...\).*/,g=\1/;s/-//g;s/^,g=$//;'$s`
o=`echo $rwx|sed 's/^.......\(...\).*/,o=\1/;s/-//g;s/^,o=$//;'$s';'$t`
echo "=$u$g$o"
exit 0
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