add-prefix-to-each-output-line.md

给命令的每一行输出加前缀的方法

#! /bin/bash
exec > >(trap "" INT TERM; sed 's/^/foo: /')
exec 2> >(trap "" INT TERM; sed 's/^/foo: (stderr) /' >&2)
echo foo
echo bar >&2
date

输出结果

foo: foo
foo: (stderr) bar
foo: Fri Apr 27 20:04:34 IST 2018

出自 https://unix.stackexchange.com/a/440439/373303