#!/bin/sh
#
# myini.cgi
#
# This scriptis more of my shell scripting practice than for real use,
# although it should do respective job.
#
# It will read and parse /www/U/USER/etc/myini.txt and
# replace corresponding entries found in /usr/local/lib/php.ini
# and write the result into /www/U/USER/htdocs directory.
# It'll remove the comments and blank lines, as well.
#
# This is a pure shell script and uses NO external command !
# So, it should perform better than a scripts with test [ ] and sed.
#

case "$HOME" in ));;'')echo -e "Content-type: text/plain\n\n" ;;esac

main (){
# "main" function, just for easy redirect.

U=`whoami`
QQ=${HOME:=/www/${U%${U#?}}/$U}

INI='/usr/local/lib/php.ini'
MYINI="$HOME/etc/myini.txt"
INIOUT="$HOME/htdocs/php.ini"

getmyini () {
# A function to parse and prepare the keyword list (or array, dict, whatever)
  C=0
  KL=''
  while :;do
    read R || break
    case "$R" in ));;'')continue;;'#'*)continue;;';'*)continue;;esac
    KEY=${R%%=*}
    while :;do case "$KEY" in ));;*' ')KEY=${KEY%?};;*)break;;esac;done
    case "$KEY" in ));;'')continue;;esac
    C=$(($C+1))
    KL="$KL${C}_=_${KEY},$R "
  done
}


rini () {
# Read php.ini and replace lines that match one of keyword
# stored in the kyword list, and eliminates blank&comment lines.
  CL=0
  DL=' '
  while :;do
    CL=$(($CL+1))
    read R || break

    # Comment out following line if you don't want blank&comment stripping
    case "$R" in ));;'')continue;;';'*)continue;;esac
   
    CC=0
    while :;
    do 
      CC=$(($CC+1))
      E=${KL##*${CC}_=_}
      K=${E%%,*}
      L=${E%% $(($CC+1))_=_*}
      L=${L#*,}
      FOUND=0
      case "$R" in ));;
       *"$K"*)
        echo ";;; Following line is from $MYINI ;;;";
        echo "$L";FOUND=1
        DL="$DL${CC} " ;break
        ;;
      esac
      case "$CC" in ));;$C)break;;esac
    done

    case "$FOUND" in ));;0)echo "$R";;esac
  done
#  echo '; Additional elements, if any.'
  CC=0
  while :;
  do 
    case "$CC" in ));;$C)break;;esac
    CC=$(($CC+1))
    case "$DL" in ));;*" $CC "*)continue;;
    *)
      E=${KL##*${CC}_=_}
      L=${E%% $(($CC+1))_=_*}
      L=${L#*,}
      echo ";;; Following line 'Added' from $MYINI ;;;";
      echo "$L";FOUND=1
      ;;
    esac
  done

}


# Parse myini.txt and prepare the replacement list $KL
getmyini <"$MYINI"

# Treat the php.ini
rini <"$INI" >"$INIOUT"

echo "processed $INI ($CL lines) !"
}

main 2>&1

exit