On Wed, Sep 20, 2000 at 04:37:43PM +0200, Akim Demaille wrote:
>
> #!/bin/sh
>
> test -f /bin/sh5 && test -z "$RUNNING_SH5" \
> && { UNAMES=`uname -s`; test "x$UNAMES" = xULTRIX; } 2>/dev/null \
> && { RUNNING_SH5=true; export RUNNING_SH5; exec /bin/sh5 $0 ${1+"$@"}; }
> unset RUNNING_SH5
>
> test -f /bin/bsh && test -z "$RUNNING_BSH" \
> && { UNAMES=`uname -s`; test "x$UNAMES" = xAIX; } 2>/dev/null \
> && { RUNNING_BSH=true; export RUNNING_BSH; exec /bin/bsh $0 ${1+"$@"}; }
> unset RUNNING_BSH
>
> Gary has a better method somewhere.
Attached =)O|
Cheers,
Gary.
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#! /bin/sh
# Zsh is not Bourne compatible without the following:
if test -n "$ZSH_VERSION"; then
emulate sh
NULLCMD=:
fi
# Bash is not POSIX compliant without the following:
test -n "$BASH_VERSION" && set -o posix
SHELL="${SHELL-/bin/sh}"
if test x"$1" = x--re-executed; then
# Functional shell was found. Remove option and continue
shift
elif "$SHELL" -c 'foo () { exit 0; }; foo' 2>/dev/null; then
# The current shell works already!
:
else
# Try alternative shells that (sometimes) support functions
for cmd in sh bash ash bsh ksh zsh sh5; do
set `IFS=:; X="$PATH:/bin:/usr/bin:/usr/afsws/bin:/usr/ucb"; echo $X`
for dir
shell="$dir/$cmd"
if (test -f "$shell" || test -f "$shell.exe") &&
"$shell" -c 'foo () { exit 0; }; foo' 2>/dev/null
then
# Re-execute with discovered functional shell
SHELL="$shell" exec "$shell" "$0" --re-executed ${1+"$@"}
fi
done
done
echo "Unable to locate a shell interpreter with function support" >&2
exit 1
fi
foo () {
echo "$SHELL: ta da!"
}
foo
exit 0
