# $1 - file-descriptor to be read from
# $2 - name of output variable (default: REPLY)

local __in_fd=${1:-0} __out_var=${2:-REPLY}
local -a __tmp
integer __ret=1 __repeat=10 __tmp_size=0

while sysread -s 65535 -i "$__in_fd" '__tmp[__tmp_size + 1]'; do
    (( ( __ret=$? ) == 0 )) && (( ++ __tmp_size ))
    (( __ret == 5 )) && { __ret=0; (( --__repeat == 0 )) && break; }
done

: ${(P)__out_var::="${(j::)__tmp}"}

return __ret

# vim: ft=zsh:et:sw=4:sts=4