iankelling.org Git - small-misc-bash/blob - ll-function

   1 #!/bin/bash
   2 # Copyright (C) 2014 Ian Kelling
   3
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at
   7
   8 #     http://www.apache.org/licenses/LICENSE-2.0
   9
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15
  16
  17 # ls -lA with enhanced output
  18 # octal permissions
  19 # omited acl type specifier
  20 # better hard link count: number of subdirectories or number of linked files or omitted if 0
  21 # better human readable size
  22 # more natural date/time format for my American raised eyes
  23 # remove first line size summary
  24 ll() {
  25     case $1 in
  26         -h|--help)
  27             cat <<'EOF'
  28 usage: ll [ARGS_TO_LS]
  29
  30 ls -lA with enhanced output
  31 EOF
  32             ;;
  33     esac
  34     local x y perm line binls sizePadding middle tail size \
  35           max_hl_digits hardlinks initial_space hardlink_spacing
  36     local max_hl_digits=0
  37     local -a lines hl
  38     binls=$(type -P ls)
  39     local aclchar=false
  40     # there's no way to tell if ls uses the acl specifier unless we loop over the data twice
  41     # the 11th char is either
  42     #  . for selinux context
  43     #  + for any other kind of acl
  44     #  or blank for no other kind of acl
  45     #  I don't want to see this generally.
  46     while read line; do
  47         # if we did want the first line, it would need to be stripped of non-printing chars:
  48         #line=${line#$'\E[00m'}
  49         # lines like "total 123M", we don't want
  50         if [[ ! $line =~ ^total\ [0-9][^\ ]*$ ]]; then
  51             lines+=("$line")
  52             if ! [[ $line == [-dscbl][-r][-w][-xsS][-r][-w][-xsS][-r][-w][-xtT]* ]]; then
  53                 hardlinks=
  54             else
  55                 [[ ! ${line:10:1} == " " ]] && aclchar=true
  56
  57                 # we also need to parse the hardlinks on the first pass, because for
  58                 # example ls could see the highest count as 11, and thus use 3
  59                 # places for hardlinks, " 10", but then we use 9 or 8 for a more
  60                 # useful count, and would then use 2 places. So we have to look
  61                 # through them all because we can't rely on the spacing that ls
  62                 # decided on.
  63                 y="${line:11}"
  64                 initial_space="${y%%[![:space:]]*}"
  65                 hardlinks="${y#$initial_space}" # remove any initial spaces
  66                 hardlinks="${hardlinks%%[[:space:]]*}" # remove everything beyond first word
  67                 # ignore the hardlinks that files/dirs always have
  68                 hardlinks=$(( hardlinks - 1 ))
  69                 [[ $hardlinks == 0 ]] && hardlinks=
  70                 if (( ${#hardlinks} > max_hl_digits )); then
  71                     max_hl_digits=${#hardlinks}
  72                 fi
  73             fi
  74             hl+=("$hardlinks")
  75         fi
  76     done< <( "$binls" -lAh --color=always "--time-style=+%m-%d     %Y
  77 %m-%d %I:%M %P" "$@" )
  78
  79     hardlink_spacing=$((max_hl_digits + 1))
  80
  81     for index in "${!lines[@]}"; do
  82         line=${lines[index]}
  83         hardlinks=${hl[index]}
  84         if ! [[ $line == [-dscbl][-r][-w][-xsS][-r][-w][-xsS][-r][-w][-xtT]* ]]; then
  85             printf "%s\n" "$line"
  86         else
  87             perm=0
  88             for (( x=0; x<=8; x++ )); do
  89                 y=${line:$(( -1*x + 9 )):1}
  90                 [[ $y == [tT] ]] && perm=$(( perm + 512 ))
  91                 if [[ $y == [sS] ]]; then
  92                     [[ $x == 3 ]] && perm=$(( perm + 1024 ))
  93                     [[ $x == 6 ]] && perm=$(( perm + 2048 ))
  94                 fi
  95                 [[ $y != [-ST] ]] && perm=$(( perm + 2**x ))
  96             done
  97             if $aclchar; then
  98                 y="${line:11}"
  99             else
 100                 y="${line:10}"
 101             fi
 102             middle=${y#*[^ ]* }
 103             size=${middle#*[^ ]* *[^ ]* }
 104             middle=${middle%"$size"}
 105             tail=${size#*[^ ]* }
 106             size=${size%"$tail"}
 107             declare -i sizePadding="${#size} - 1"
 108             size=( $size ) # remove spaces
 109             size=${size/.?/}
 110
 111             printf "%s%4o%${hardlink_spacing}s%s%${sizePadding}s%s\n" \
 112                    "${line:0:1}" $perm "$hardlinks" " $middle" "$size" " $tail"
 113         fi
 114     done
 115 }