如何测试命令的退出代码是否等于给定值?我正在寻找与以下内容等效的内容,而无需先运行命令并检索
$?
:
diff a.txt b.txt
if [ $? = 2 ]; then
echo diff failed
exit 2
fi
这与以下问题不同,因为该问题询问检查退出代码是否等于特定值而不是零或不为零:
退出代码没有大于 1 的快捷方式。不过你可以这样写:
if² diff a.txt b.txt; [ $? = 2 ]; then
echo diff failed
exit 2
fi