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     local x y perm line binls sizePadding middle tail size \
  26           max_hl_digits hardlinks initial_space hardlink_spacing
  27     local max_hl_digits=0
  28     local -a lines hl
  29     binls=$(type -P ls)
  30     local aclchar=false
  31     # there's no way to tell if ls uses the acl specifier unless we loop over the data twice
  32     # the 11th char is either
  33     #  . for selinux context
  34     #  + for any other kind of acl
  35     #  or blank for no other kind of acl
  36     #  I don't want to see this generally.
  37     while read line; do
  38         # if we did want the first line, it would need to be stripped of non-printing chars:
  39         #line=${line#$'\E[00m'}
  40         # lines like "total 123M", we don't want
  41         if [[ ! $line =~ ^total\ [0-9][^\ ]*$ ]]; then
  42             lines+=("$line")
  43             if ! [[ $line == [-dscbl][-r][-w][-xsS][-r][-w][-xsS][-r][-w][-xtT]* ]]; then
  44                 hardlinks=
  45             else
  46                 [[ ! ${line:10:1} == " " ]] && aclchar=true
  47
  48                 # we also need to parse the hardlinks on the first pass, because for
  49                 # example ls could see the highest count as 11, and thus use 3
  50                 # places for hardlinks, " 10", but then we use 9 or 8 for a more
  51                 # useful count, and would then use 2 places. So we have to look
  52                 # through them all because we can't rely on the spacing that ls
  53                 # decided on.
  54                 y="${line:11}"
  55                 initial_space="${y%%[![:space:]]*}"
  56                 hardlinks="${y#$initial_space}" # remove any initial spaces
  57                 hardlinks="${hardlinks%%[[:space:]]*}" # remove everything beyond first word
  58                 # ignore the hardlinks that files/dirs always have
  59                 if [[ ${line:0:1} == d ]]; then
  60                     hardlinks=$(( hardlinks - 2 ))
  61                 else
  62                     hardlinks=$(( hardlinks - 1 ))
  63                 fi
  64                 [[ $hardlinks == 0 ]] && hardlinks=
  65                 if (( ${#hardlinks} > max_hl_digits )); then
  66                     max_hl_digits=${#hardlinks}
  67                 fi
  68             fi
  69             hl+=("$hardlinks")
  70         fi
  71     done< <( "$binls" -lAh --color=always "--time-style=+%m-%d     %Y
  72 %m-%d %I:%M %P" "$@" )
  73
  74     hardlink_spacing=$((max_hl_digits + 1))
  75
  76     for index in "${!lines[@]}"; do
  77         line=${lines[index]}
  78         hardlinks=${hl[index]}
  79         if ! [[ $line == [-dscbl][-r][-w][-xsS][-r][-w][-xsS][-r][-w][-xtT]* ]]; then
  80             printf "%s\n" "$line"
  81         else
  82             perm=0
  83             for (( x=0; x<=8; x++ )); do
  84                 y=${line:$(( -1*x + 9 )):1}
  85                 [[ $y == [tT] ]] && perm=$(( perm + 512 ))
  86                 if [[ $y == [sS] ]]; then
  87                     [[ $x == 3 ]] && perm=$(( perm + 1024 ))
  88                     [[ $x == 6 ]] && perm=$(( perm + 2048 ))
  89                 fi
  90                 [[ $y != [-ST] ]] && perm=$(( perm + 2**x ))
  91             done
  92             if $aclchar; then
  93                 y="${line:11}"
  94             else
  95                 y="${line:10}"
  96             fi
  97             middle=${y#*[^ ]* }
  98             size=${middle#*[^ ]* *[^ ]* }
  99             middle=${middle%"$size"}
 100             tail=${size#*[^ ]* }
 101             size=${size%"$tail"}
 102             declare -i sizePadding="${#size} - 1"
 103             size=( $size ) # remove spaces
 104             size=${size/.?/}
 105
 106             printf "%s%4o%${hardlink_spacing}s%s%${sizePadding}s%s\n" \
 107                    "${line:0:1}" $perm "$hardlinks" " $middle" "$size" " $tail"
 108         fi
 109     done
 110 }
 111