产生读取错误 [英] Generate a read error

问题描述

通过写入 /dev/full 在测试套件中生成写入错误很简单.是否有产生读取错误的好技术?我目前正在使用 LD_PRELOAD 来覆盖 read 但这似乎太复杂且不可移植(不是说/dev/full 是可移植的......).

It's simple to generate a write error in a test suite by writing to /dev/full. Is there a good technique to generate a read error? I'm currently using LD_PRELOAD to override read but that seems too complicated and non-portable (not that /dev/full is portable...).

推荐答案

除了从目录中读取(如之前的答案中提到的)之外，您还可以尝试读取 /proc/self/mem 以获取一个错误(这应该会让你在 Linux 上获得一个 EIO).有关说明，请参阅:https://unix.stackexchange.com/a/6302

Besides reading from a directory (as mentioned in a previous answer) you can try to read /proc/self/mem to get an error (this should get you an EIO on Linux). For an explanation, please see: https://unix.stackexchange.com/a/6302

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