quote args and eval

quote-args-and-eval.sh

#!/bin/sh

fn()
{
  local _first=y
  while [ $# -gt 0 ]
  do
      if [ -z "${_first}" ]; then
          echo -n ' '
      fi
      echo -n "'"
      echo -n "$1" | sed -e "s/'/'\\\\''/g"
      echo -n "'"
      _first=
      shift
  done
}

printargs()
{
    local _index=1
    while [ $# -gt 0 ]
    do
        echo "#${_index}: $1"
        _index=$(expr "${_index}" + 1)
        shift
    done
}

# standard call.
printargs 'a b' 'c "d"' "e 'f'"

# generate quoted string for eval.
args=$(fn 'a b' 'c "d"' "e 'f'")
echo "args: ${args}"

# do eval.
eval "printargs ${args}"

run.txt

$ sh test.sh
#1: a b
#2: c "d"
#3: e 'f'
args: 'a b' 'c "d"' 'e '\''f'\'''
#1: a b
#2: c "d"
#3: e 'f'