定义EOF字符 [英] Define EOF character

问题描述

出于好奇，是否可以暂时添加应解释为EOF的字符?例如，在循环中使用read()系统调用，并通过将新行字符临时注册为EOF来使其在'\n'上中止.

Out of curiosity is it possible to temporarily add a character that should be interpreted as EOF? For example using the read() syscall in a loop, and have it abort on '\n' by register the new line character as EOF temporarily.

推荐答案

否，不可能.如果要从文件描述符中读取数据，直到遇到特定字符，并避免读取任何超出其的字符(例如，以免消耗其他进程稍后需要的输入)，唯一的解决方案是执行1字节读取.速度很慢，但事实就是如此.

Nope, not possible. If you want to read from a file descriptor until you encounter a specific character, and avoid reading anything past it (so as not to consume input needed later by another process, for instance) the only solution is to perform 1-byte reads. It's slow but that's how it is.

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