bin/sde-config-ini

   1 #!/bin/sh
   2 # --- SDE-COPYRIGHT-NOTE-BEGIN ---
   3 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
   4 #
   5 # Filename: bin/sde-config-ini
   6 # Copyright (C) 2006 - 2008 The OpenSDE Project
   7 #
   8 # More information can be found in the files COPYING and README.
   9 #
  10 # This program is free software; you can redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation; version 2 of the License. A copy of the
  13 # GNU General Public License can be found in the file COPYING.
  14 # --- SDE-COPYRIGHT-NOTE-END ---
  15
  16 [ -n "$SDEROOT" ] ||
  17         export SDEROOT=$( cd "${0%/*}/.."; pwd -P )
  18
  19 . $SDEROOT/lib/libsde.in
  20
  21 ini_usage() {
  22         local progname=${0##*/}
  23 cat <<EOT
  24 Usage:  $progname --file <file> --sections
  25         $progname --file <file> --keys <section>
  26         $progname --file <file> [--delete] section[.key] ...
  27         $progname --file <file> section[[.key]=value] ...
  28
  29 Valid aliases:
  30         --file (-F)
  31         --sections (-S)
  32         --keys (-K)
  33 EOT
  34 }
  35
  36 # splits an .ini file in three parts:
  37 # * before the section ($tmpname.0)
  38 # * the section ($tmpname.1)
  39 # * after the section ($tmpname.2)
  40 #
  41 # USAGE: ini_split "file" "section" "tmpname"
  42 #
  43 ini_split() {
  44         local file="$1" section="$2" tmpname="$3"
  45
  46         rm -rf $tmpname.{0,1,2}
  47
  48         if [ ! -e "$file" ]; then
  49                 # create the file if it's not there
  50                 touch "$file" || echo_abort 1 "$file: can't write."
  51         fi
  52
  53         [ -f "$file" -a -w "$file" ] || echo_abort 1 "$file: can't write."
  54
  55         gawk "BEGIN { level=0; }
  56         /^\[/ {
  57                 if ( level == 0 && \$0 ~ /^\[$section\][ \t]*\$/ )
  58                         level=1;
  59                 else if ( level == 1 )
  60                         level=2;
  61         }
  62         { print > \"$tmpname.\" level }
  63         " "$file"
  64
  65         # clean empty lines on the section to alter
  66         [ ! -s "$tmpname.1" ] || sed -i -e "/^[ \t]*$/d;" "$tmpname.1"
  67
  68 }
  69
  70 # merge a previously split .ini file
  71 # USAGE: ini_merge "file" "section" "tmpname"
  72 #
  73 ini_merge() {
  74         local file="$1" tmpname="$2"
  75         local x=
  76
  77         # new empty line at the end of the section, if there is a next
  78         if [ -s "$tmpname.1" -a -s "$tmpname.2" ]; then
  79                 echo >> "$tmpname.1"
  80         fi
  81
  82         for x in 0 1 2; do
  83                 if [ -s $tmpname.$x ]; then
  84                         cat $tmpname.$x
  85                 fi
  86         done > "$file"
  87
  88         rm -rf $tmpname.{0,1,2}
  89 }
  90
  91 # dumps the raw content of a section
  92 # USAGE: ini_section_raw "file" "section"
  93 #
  94 ini_section_raw() {
  95         gawk "BEGIN { show=0; }
  96         /^\[/ {
  97                 if ( \$0 ~ /^\[$2\][ \t]*\$/ )
  98                         show=1;
  99                 else
 100                         show=0;
 101                 }
 102         /^[^\[]/ { if ( show ) print; }" "$1"
 103 }
 104
 105 shortopts='F:SK:'
 106 longopts='file:,sections,keys:,delete'
 107 options=$( getopt -o "$shortopts" -l "$longopts" -- "$@" )
 108 if [ $? -ne 0 ]; then
 109         ini_usage
 110         exit -1
 111 fi
 112
 113 # load new arguments list
 114 eval set -- "$options"
 115
 116 if [ $# -lt 2 ]; then
 117         ini_usage
 118         exit -1
 119 fi
 120
 121 file=
 122 delete=
 123 while [ $# -gt 0 ]; do
 124         case "$1" in
 125                 -F|--file)      shift; file="$1" ;;
 126                 --delete)       delete=yes ;;
 127
 128                 --)             shift; break ;;
 129
 130                 -S|--sections)
 131                         [ -r "$file" ] || echo_abort 1 "${file:-none}: can't read."
 132
 133                         exec sed -n -e 's,^\[\(.*\)\][ \t]*$,\1,p' "$file"
 134                         ;;
 135                 -K|--keys)
 136                         [ -r "$file" ] || echo_abort 1 "${file:-none}: can't read."
 137
 138                         ini_section_raw "$file" "$2" |
 139                                 sed -n -e 's,^[ \t]*\([^;= ]*\)[ \t]*=.*,\1,p'
 140                         exit $?
 141                         ;;
 142         esac
 143         shift
 144 done
 145
 146 if [ -z "$file" ]; then
 147         echo_abort 1 "no ini file specified."
 148 fi
 149
 150 oldsection=
 151 tmpfile="$file.$$"
 152 section= key= value= action=
 153
 154 for item; do
 155         # parse 'item'
 156         section="${item%%.*}"
 157         value="${item#*=}"
 158         key="${item#*.}"; key="${key%%=*}"
 159
 160         [ "$section" != "$key" ] || key=
 161
 162         # choose an action
 163         if [ "$value" = "$item" ]; then
 164                 if [ -n "$delete" ]; then
 165                         action='delete'
 166                 else
 167                         action='get'
 168                 fi
 169         else
 170                 action='set'
 171         fi
 172
 173         case "$action" in
 174                 get)    [ -r "$file" ] || echo_abort 1 "${file:-none}: can't read."
 175
 176                         if [ -n "$key" ]; then
 177                                 # just on key
 178                                 ini_section_raw "$file" "$section" | sed -n \
 179                                         -e "s,^[ \t]*$key[ \t]*=\(.*\),\1,p"
 180                         else
 181                                 # the entire section, as variables
 182                                 ini_section_raw "$file" "$section" | sed \
 183                                         -e '/^[ \t]*;/d;' -e '/^[ \t]*$/d;' -e 's,",\\",g' -e 's,=\(..*\)$,="\1",'
 184                         fi ;;
 185                 set)
 186                         if [ -n "$oldsection" -a "$oldsection" != "$section" ]; then
 187                                 # close previous split
 188                                 ini_merge "$file" "$tmpfile"
 189                                 oldsection=
 190                         fi
 191
 192                         if [ -z "$oldsection" ]; then
 193                                 # split before mangling
 194                                 ini_split "$file" "$section" "$tmpfile"
 195                                 oldsection="$section"
 196                         fi
 197
 198                         if [ ! -s "$tmpfile.1" ]; then
 199                                 # new section
 200                                 if [ -s "$tmpfile.0" ]; then
 201                                         # empty line at the end of the last section
 202                                         echo >> "$tmpfile.0"
 203                                 fi
 204                                 echo -e "[$section]" >> "$tmpfile.1"
 205                         fi
 206
 207                         if grep -q "^[ \t]*$key[ \t]*=" $tmpfile.1; then
 208                                 sed -i -e "s|^[ \t]*$key[ \t]*=.*|$key=$value|" "$tmpfile.1"
 209                         else
 210                                 echo "$key=$value" >> "$tmpfile.1"
 211                         fi
 212                         ;;
 213                 delete)
 214                         if [ -n "$oldsection" -a "$oldsection" != "$section" ]; then
 215                                 # close previous split
 216                                 ini_merge "$file" "$tmpfile"
 217                                 oldsection=
 218                         fi
 219
 220                         if [ -z "$oldsection" ]; then
 221                                 # split before mangling
 222                                 ini_split "$file" "$section" "$tmpfile"
 223                                 oldsection="$section"
 224                         fi
 225
 226                         if [ -n "$key" ]; then
 227                                 # just on key
 228                                 grep -v "^[ \t]*$key[ \t]*=" "$tmpfile.1" > "$tmpfile.1+"
 229                                 mv -f "$tmpfile.1+" "$tmpfile.1"
 230                         else
 231                                 # the entire section
 232                                 echo "[$section]" > "$tmpfile.1"
 233                         fi
 234                         ;;
 235         esac
 236 done
 237
 238 if [ -n "$oldsection" ]; then
 239         ini_merge "$file" "$tmpfile"
 240 fi