* Ralf Wildenhues wrote on Thu, Jan 27, 2005 at 09:39:46AM CET:
>
> I have attached a small script, and encourage
> people to test it on all their shells they can find on their systems.
> It should reveal at least one working echo, and, in most cases, find
> builtins to do the job.
and here it is..
#! /bin/sh
# Be Bourne compatible
if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
emulate sh
NULLCMD=:
# Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which
# is contrary to our usage. Disable this feature.
alias -g '${1+"$@"}'='"$@"'
setopt NO_GLOB_SUBST
elif test -n "${BASH_VERSION+set}${KSH_VERSION+set}" && (set -o posix)
>/dev/null 2>&1; then
set -o posix
fi
BIN_SH=xpg4; export BIN_SH # for Tru64
DUALCASE=1; export DUALCASE # for MKS sh
: ${lt_ECHO=echo}
func_fallback_echo ()
{
# Without the eval, Bourne shells create the here doc at definition time.
eval 'cat <<_LT_EOF
$*
_LT_EOF
'
: # work around bash bug
}
for ECHO in "$lt_ECHO" 'print -r' 'printf %s\n' func_fallback_echo \
'/usr/bin/printf %s\n' false
do
if test X`{ $ECHO '\t'; } 2>/dev/null` = 'X\t'; then
set x $ECHO; shift
type $1
case `{ type $1; } 2>/dev/null` in
*builtin*) $ECHO "$ECHO is a working builtin echo." ;;
*) $ECHO "$ECHO is a working external echo." ;;
esac
fi
done
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