open()如果我打开同一文件两次会怎样? [英] open() what happens if I open twice the same file?

问题描述

如果我打开同一文件两次，它会给出错误消息，还是会创建两个不同的文件描述符?例如

If I open the same file twice, will it give an error, or will it create two different file descriptors? For example

a = open("teste.txt", O_RDONLY);
b = open("teste.txt", O_RDONLY);

推荐答案

在这种情况下，由于您将两个文件都以只读方式打开，因此您将获得两个引用同一文件的不同文件描述符.有关更多详细信息，请参见打开手册页.

In this case, since you're opening both files as read-only, you will get two different file descriptors that refer to the same file. See the man page for open for more details.

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