Re: [c-prog] fgets() behaviour after EOF

[andrew clarke]

On Wed 2009-11-25 14:48:42 UTC-0000, johnmatthews2000 (jm5...@gmail.com) wrote:

> If fgets() on a FILE* returns 0 indicating end-of-file, is it safe to
> call it again? That is, is it guaranteed that the function will return
> 0 again with no undesirable side effects?

fgets() returns a pointer, not an integer.

What are you trying to achieve?

Normally you'd do something like:

  #define BUFSIZE 512
  char s[BUFSIZE], *p;

  p = fgets(s, sizeof s, fp);

  while (p != NULL)
  {
      print("%s", p);
      p = fgets(s, sizeof s, fp);
  }

  if (ferror(fp))
  {
      /* something bad happened! */

      /* ... */
  }