how to pass numeric array from bash to csh

I'm not familiar with arrays in csh, but exporting seems easy enough:

in bash:

bdom=${BDOM[*]} mday=${MDAY[*]} ${PARTNER_FP}

You don't need the "env" command, bash has that built in.

To make $bdom into a list of words, instead of a single string, use ().in csh:

set bdom_array = ( $bdom )

bash doesn't let you export arrays. ("Yet", although it's been "not yet" for a long time.) So it's not that there is a problem exporting arrays from bash to csh. You can't export them from bash to bash either. (Nor, as far as I know, from csh to csh.)

There isn't really a great workaround either. You could use the printf '%q' format to print the elements out in a format which could be eval'd, but you'd have to do that every time you changed an array element, or at least every time you might need to import it into a subshell. Also, bash's printf doesn't necessarily export values in a format which csh's eval will understand.

As @rici points out, bash doesn't support exporting arrays - neither with export nor with env - and there's no robust workaround.

That said, if you know that:

• the array elements contain no embedded spaces or other characters that need escaping
• the array contains no elements that happen to be valid globbing patterns (e.g., '*')

then you can flatten your arrays into single-line, space-separated lists, and pass them that way.

In your example:

In array_writer.sh:

# export array as word list, i.e.:# as single-line string with space-separated tokensexport BDOM_LIST="${BDOM[@]}"

In array_reader.csh:

# Convert word list back into array.set BDOM=($BDOM_LIST)