相关疑难解决方法(0)

考虑源代码：

1. 父.sh

#!/usr/bin/ksh
# No tee
ksh Child.sh;
exit_status=$?;
echo "Exit status: ${exit_status}"
# Using tee
ksh Child.sh | tee -a log.txt;
exit_status=$?;
echo "Exit status: ${exit_status}"

2. 子.sh

#!/usr/bin/ksh
...
exit 1;

输出：

Exit status: 1
Exit status: 0

• 变量$exit_status正在捕获 Child.sh 的退出状态，1.
• 在第二种情况下，$exit_status正在捕获 tee 的退出状态，即0.

那么如何捕获退出状态并使用 tee 呢？

This question is similar to the following link, but focused on using the command line (bash shell).

Using a simple example, when doing the following command:

$ cat <(date); echo $?
Fri Jul  7 21:04:38 UTC 2017
0

The exit value is 0 as expected.

In the following command there is an error introduced on purpose, but the return value is still 0:

$ cat <(datE); echo $?
bash: datE: command not found...
Similar command is: 'date'
0

Is …