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|
#!/bin/bash
#
# shop - Show Permissions at all levels of a given path
#
# With `tree(1)` you start at a trunk and show all leaves that
# originate from that trunk, optionally showing permissions.
# `shop` starts at a leaf and shows the permissions back to a
# trunk.
#
# CREATED: 2009-09-03 17:30
# MODIFIED: 2009-11-17 11:05
_NAME=$(basename $0)
_VERSION=1.0
# DEFAULTS
unset octal # use text mode instead of octal mode
level=-1 # traverse all the way up to /
trunk='/' # traverse all the way up to /
pad=17 # padding for pathname
usage() {
cat <<EOT
Usage: $_NAME [-L N] [-o] [-t PATH] [PATH1..]
Options:
-L, --level N traverse N levels up the tree
-o, --octal show octal mode instead of human readable mode
-t, --trunk PATH only traverse up to PATH instead of / (root)
- takes precedence over --level
-p, --pad N allow USER:GROUP N characters before directory name
default: 17
-h, --help show this message
--version show version info
EOT
}
_shop() {
[ $octal ] && stat_str="%a" || stat_str="%A"
stats=( $(stat -c "$stat_str %U:%G %n" "$1") )
if [ $octal ]; then
# `stat -c "%a"` only returns a 4 digit mode when the first digit is
# nonzero, yet `stat` always returns a 4 digit mode. how annoying...
[ ${#stats} -eq 3 ] && echo -n "0"
fi
printf "%s %-${pad}s ${stats[@]:2}\n" "${stats[@]:0:2}"
}
main() {
arg="$1"
if [ -z "$arg" ]; then
# user didn't supply an arg, use current working dir
arg="$PWD"
fi
until [ -z "$arg" ]; do
if ! [ -a "$arg" ]; then
echo "error: $arg does not exist"
return 1
fi
# if $arg is a directory, prime the directory stack, else use
# the parent dir of $arg to prime the stack
if [ -d "$arg" ]; then
cd "$arg" || return 1
unset file_arg
else
cd $(dirname -- "$arg") || return 1
file_arg=1
let "level -=1"
fi
start_dir=$PWD
# populate directory stack with $level levels on the path to
# the $trunk
while [ "$PWD" != "$trunk" ]; do
if [ $level -gt 0 ] || [ $level -lt 0 ]; then
let "level -= 1"
pushd .. &> /dev/null
elif [ $level -eq 0 ]; then
break;
fi
done
# display the permissions for each level
while [ "$PWD" != "$start_dir" ]; do
_shop "$PWD"
popd &> /dev/null
done
_shop "$PWD"
# leaf was a file, run _shop on this file as well
if [ $file_arg ]; then
_shop "${PWD}/$(basename -- "$arg")"
else
cd .. || return 1
fi
# user passed multiple leafs, separate output for each leaf
if [ $# -gt 1 ]; then
echo
fi
shift
arg="$1"
done
}
declare -a args
until [ -z "$1" ]; do
case "$1" in
-L|--level) level="$2"
shift 2
;;
-o|--octal) octal=1
shift
;;
-t|--trunk) trunk="$(readlink -f $2)"
shift 2
;;
-p|--pad) pad="$2"
shift 2
;;
-h|--help) usage
exit
;;
--version) echo "$_NAME v$_VERSION"
exit
;;
--) shift
args=( "${args[@]}" "$@" )
break
;;
-*) echo -e "$_NAME: unknown option: $1\n"
usage
exit
;;
*) args[${#args[*]}]="$1"
shift
;;
esac
done
main "${args[@]}"
|
