Greg Wooledge wrote:
On Fri, Mar 28, 2014 at 06:14:27PM -0700, Linda Walsh wrote:
Does read varname <<<$(...) use process substitution?
I wouldn't dare write it like that, because who knows how the parser
will treat it. I'd write it this way:
read varname <<< "$(...)"
This is a command substitution and a here-string. Here-strings are
implemented with a temporary file, I believe.
----
Well don't know if it circumvents the /fd/62 prob
yet (got a few places more to check & convert),
but this seems to work for checking if a file
or dir is empty:
function empty {
[[ $# -lt 1 ]] && return -1
[[ -f $1 && ! -s $1 ]] && return 0
[[ -d $1 ]] && {
readarray entries<<<"$(cd "$1" && printf "%s\n" * 2>/dev/null)"
((${#entries[@]} < 3)) && return 0
}
return 1
}
Had one with find+wc, but this one doesn't rely on any
sub-utils.
