#Newsgroups: comp.unix.shell #From: gwc@root.co.uk (Geoff Clare) #Subject: Re: Determining permissions on a file #Message-ID: #Date: Fri, 10 May 1996 17:23:56 GMT #Here's a bit of Korn shell that converts the symbolic permissions produced #by "ls -l" into octal, using only shell builtins. How to create a script #combining this with an "ls -l" is left as an exercise... # # # Converted to Bash v2 syntax by Chet Ramey # # usage: showperm modestring # # example: showperm '-rwsr-x--x' # [ -z "$1" ] && { echo "showperm: usage: showperm modestring" >&2 exit 2 } tmode="$1" typeset -i omode sbits typeset pmode # check for set-uid, etc. bits sbits=0 case $tmode in ???[sS]*) (( sbits += 8#4000 )) ;; # set-uid ??????[sSl]*) (( sbits += 8#2000 )) ;; # set-gid or mand. lock ?????????[tT]*) (( sbits += 8#1000 )) ;; # sticky esac omode=0 while : do tmode=${tmode#?} case $tmode in "") break ;; [-STl]*) (( omode *= 2 )) ;; [rwxst]*) (( omode = omode*2 + 1 )) ;; *) echo "$0: first letter of \"$tmode\" is unrecognized" >&2 (( omode *= 2 )) ;; esac done (( omode += sbits )) printf "0%o\n" $omode