c - 使用 getline 获取输入并检查它是否是 C 中的 CTRL-D

Question

我对 C 还很陌生，基本上我遇到的问题是目前我有这个

  char* buf = (char*) malloc(sizeof(char) * MAX_LINE);
  size_t n=MAX_LINE;
  getline(&buf, &n, stdin);

如何检查 buf 以查看何时输入了 CTRL-D？

非常感谢

Answer 1

^D 将在标准输入上发送 EOF。

来自联机帮助页:

   On success, getline() and getdelim() return the number of characters read, including the delimiter character, but not includ‐
   ing the terminating null byte.  This value can be used to handle embedded null bytes in the line read.

   Both functions return -1 on failure to read a line (including end-of-file condition).