使用getline获取输入并检查C中是否为CTRL-D

Question

im pretty new to c and bascially the problem im having is this currently i have this

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

How do i check buf in order to see when CTRL-D has been entered?

Thank you so much

Answer 1

^D will send an EOF on stdin.

From the manpage:

   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).