如何将STDOUT发送到文件，将STDOUT + STDERR发送到bash脚本中的另一个文件？

Question

我想编写一个bash shell脚本，将STDOUT重定向到文件“result.log”，将STDERR + STDOUT重定向到文件“complete.log。最好将是第三个文件，只有STDERR成为”error.log。最后向终端显示STDOUT

Linux就像19.1

#!/bin/bash
exec  > >(tee -a result.log full.log) 
exec 2>>full.log 
echo "This is stdout" 
echo "This is stderr" >&2 
echo "This is stdout 2" 
echo "This is stderr 2" >&2 
echo "This is stdout 3" 
echo "This is stderr 3" >&2 
echo "This is stdout 4" 
echo "This is stderr 4" >&2 

产量

full.log:This is stderr 
full.log:This is stderr 2
full.log:This is stderr 3 
full.log:This is stderr 4
full.log:This is stdout
full.log:This is stdout 2
full.log:This is stdout 3
full.log:This is stdout 4
result.log:This is stdout
result.log:This is stdout 2
result.log:This is stdout 3
result.log:This is stdout 4

预期

full.log:This is stdout
full.log:This is stderr
full.log:This is stdout 2
full.log:This is stderr 2
full.log:This is stdout 3
full.log:This is stderr 3
full.log:This is stdout 4
full.log:This is stderr 4
result.log:This is stdout
result.log:This is stdout 2
result.log:This is stdout 3
result.log:This is stdout 4

Answer 1

试试这种方式：

exec 1> >(tee -a result.log >>full.log)
exec 2>>full.log

但请考虑一下，full.log中的输出顺序现在是：

This is stderr
This is stderr 2
This is stderr 3
This is stderr 4
This is stdout
This is stdout 2
This is stdout 3
This is stdout 4

Answer 2

以下解决方案仅在bash支持/dev/fd/NUM时有效。它使输出保持有序。

#!/bin/bash
exec 1>>result.log 2>>full.log

echo "This is stdout"   | tee -a /dev/fd/2
echo "This is stderr"   >&2 
echo "This is stdout 2" | tee -a /dev/fd/2
echo "This is stderr 2" >&2 
echo "This is stdout 3" | tee -a /dev/fd/2
echo "This is stderr 3" >&2 
echo "This is stdout 4" | tee -a /dev/fd/2
echo "This is stderr 4" >&2