pass-lsv-to-a-command.sh

#!/bin/sh
##
## Pass LSV (Line-separated values) to a command
##

LF='
'

samplecmd() {
  for x; do
    echo "<<$x>>"
  done
}

run_cmd_with_word_splitting_arg() {
  local cmd="$1"; shift
  local arg="$1"; shift
  local shopts="$-"
  set -f
  "$cmd" $arg
  local rc="$?"
  [ -n "${shopts##*f*}" ] && set +f
  return "$rc"
}

run_cmd_with_lsv() {
  local cmd="$1"; shift
  local lsv="$1"; shift

  IFS="$LF" run_cmd_with_word_splitting_arg "$cmd" "$lsv"
}

lsv='aaa
bbb ccc
*
?'

run_cmd_with_lsv samplecmd "$lsv"