I'm trying to get last modification date of a file with this command

TM_LOCAL=`ls -l --time-style=long-iso ~/.vimrc | awk '{ print $6" "$7 }'`

TM_LOCAL has value like "2012-05-16 23:18" after execution of this line

I'd also like to check PIPESTATUS to see if there was an error. For example if file does not exists, ls returns 2. But $? has value 0 as it has the return value of awk.

If I run this command alone, I can check the return value of ls by looking at ${PIPESTATUS[0]}

ls -l --time-style=long-iso ~/.vimrc | awk '{ print $6" "$7 }'

But $PIPESTATUS does not work as I've expected if I assign the output to a variable as in the first example. In this case, $PIPESTATUS array has only 1 element which is same as $?

So, the question is, how can I get both $PIPESTATUS and assign the output to a variable at the same time?