#!/bin/bash
seq 5 | xargs echo
( seq 5 | 4<&0 0<&3 xargs -a /dev/fd/4 echo ) 3<&0
xargs -a <( seq 5 ) echo

# stdin接続先比較
ls -l /proc/self/fd/0
cat /dev/null | xargs ls -l /proc/self/fd/0
( cat /dev/null | 4<&0 0<&3 xargs -a /dev/fd/4 ls -l /proc/self/fd/0 ) 3<&0
xargs -a <( cat /dev/null ) ls -l /proc/self/fd/0