./a.out的重定向无法捕捉段错误 [英] redirection of ./a.out is not capturing segmentation fault

问题描述

我运行命令

I run the command

./a.out < in &> output.txt

我想要的错误也被放置在 output.txt的。

该命令的退出状态为139和终端输出是：

I want the errors also to be placed in output.txt.
The exit status of the command was 139 and on terminal its output was:

Segmentation fault (core dumped)

和文件 output.txt的是空的。

推荐答案

消息分割故障（核心转储）是的不的从哪里来的程序。

The message Segmentation fault (core dumped) is not coming from your program.

它是由外壳由它接收的信号的结果而产生。这不是的标准错误的一部分或标准输出的程序的。

It's produced by shell as result of a signal received by it. It's not a part of stderr or stdout of your program.

所以外壳的消息可以被捕获为：

So shell's message can be captured as:

{ ./a.out; } 2> out_err 

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