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 ll() {
  18     case $1 in
  19         -h|--help)
  20             cat <<'EOF'
  21 usage: ll [ARGS_TO_LS]
  22 ls -lA with enhanced output
  23
  24 octal permissions
  25 omited acl type specifier
  26 better hard link count: number of subdirectories or the
  27     number of linked files or omitted if it is 0
  28 better human readable size
  29 more natural date/time format for my American raised eyes
  30 remove first line size summary
  31
  32 /bin/ls output is below:
  33
  34 EOF
  35             ;;
  36     esac
  37     local x y perm line binls sizePadding middle tail size \
  38           max_hl_digits hardlinks initial_space hardlink_spacing
  39     local max_hl_digits=0
  40     local -a lines hl
  41     binls=$(type -P ls)
  42     local aclchar=false
  43     # there's no way to tell if ls uses the acl specifier unless we loop over the data twice
  44     # the 11th char is either
  45     #  . for selinux context
  46     #  + for any other kind of acl
  47     #  or blank for no other kind of acl
  48     #  I don't want to see this generally.
  49     while read line; do
  50         # if we did want the first line, it would need to be stripped of non-printing chars:
  51         #line=${line#$'\E[00m'}
  52         # lines like "total 123M", we don't want
  53         if [[ ! $line =~ ^total\ [0-9][^\ ]*$ ]]; then
  54             lines+=("$line")
  55             if ! [[ $line == [-dscbl][-r][-w][-xsS][-r][-w][-xsS][-r][-w][-xtT]* ]]; then
  56                 hardlinks=
  57             else
  58                 [[ ! ${line:10:1} == " " ]] && aclchar=true
  59
  60                 # we also need to parse the hardlinks on the first pass, because for
  61                 # example ls could see the highest count as 11, and thus use 3
  62                 # places for hardlinks, " 10", but then we use 9 or 8 for a more
  63                 # useful count, and would then use 2 places. So we have to look
  64                 # through them all because we can't rely on the spacing that ls
  65                 # decided on.
  66                 y="${line:11}"
  67                 initial_space="${y%%[![:space:]]*}"
  68                 hardlinks="${y#$initial_space}" # remove any initial spaces
  69                 hardlinks="${hardlinks%%[[:space:]]*}" # remove everything beyond first word
  70                 # ignore the hardlinks that files/dirs always have
  71                 hardlinks=$(( hardlinks - 1 ))
  72                 [[ $hardlinks == 0 ]] && hardlinks=
  73                 if (( ${#hardlinks} > max_hl_digits )); then
  74                     max_hl_digits=${#hardlinks}
  75                 fi
  76             fi
  77             hl+=("$hardlinks")
  78         fi
  79     done< <( "$binls" -lAh --color=always "--time-style=+%m-%d     %Y
  80 %m-%d %I:%M %P" "$@" )
  81
  82     hardlink_spacing=$((max_hl_digits + 1))
  83
  84     for index in "${!lines[@]}"; do
  85         line=${lines[index]}
  86         hardlinks=${hl[index]}
  87         if ! [[ $line == [-dscbl][-r][-w][-xsS][-r][-w][-xsS][-r][-w][-xtT]* ]]; then
  88             printf "%s\n" "$line"
  89         else
  90             perm=0
  91             for (( x=0; x<=8; x++ )); do
  92                 y=${line:$(( -1*x + 9 )):1}
  93                 [[ $y == [tT] ]] && perm=$(( perm + 512 ))
  94                 if [[ $y == [sS] ]]; then
  95                     [[ $x == 3 ]] && perm=$(( perm + 1024 ))
  96                     [[ $x == 6 ]] && perm=$(( perm + 2048 ))
  97                 fi
  98                 [[ $y != [-ST] ]] && perm=$(( perm + 2**x ))
  99             done
 100             if $aclchar; then
 101                 y="${line:11}"
 102             else
 103                 y="${line:10}"
 104             fi
 105             middle=${y#*[^ ]* }
 106             size=${middle#*[^ ]* *[^ ]* }
 107             middle=${middle%"$size"}
 108             tail=${size#*[^ ]* }
 109             size=${size%"$tail"}
 110             declare -i sizePadding="${#size} - 1"
 111             size=( $size ) # remove spaces
 112             size=${size/.?/}
 113
 114             printf "%s%4o%${hardlink_spacing}s%s%${sizePadding}s%s\n" \
 115                    "${line:0:1}" $perm "$hardlinks" " $middle" "$size" " $tail"
 116         fi
 117     done
 118 }