现在，要从全部共享内存文件读取和打印所有记录，创建一个循环。

Now, to read and print all the records from the entire Shared memory file, create a loop.

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在Linux系统中，您不能通过使用通常用于文件显示的cat实用工具来查看共享内存文件(常指的是shm文件)，因为这些shm文件是以二进制的格式存储的。

You cannot view the Shared memory files (commonly referred as SHM files) by using the cat utility generally used for file display in Linux since these SHM files are in a binary format.

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除了实际的文件，设备与共享内存对象都能够被映射。

In addition to actual files, devices and Shared memory objects can be mapped.

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