Comment by froh

I wonder if then The Right Way of scanf-scanning potentially large strings is the fmemopen route?

  /* ... goal: scanf some looong char *s in some loop */

  FILE *s_as_FILE = fmemopen(s, strlen(s), "r");
  /* loop loop loop */ ... {
      fscanf(s_as_FILE, "FORMAT", &v);
  }
  fclose(s_as_FILE);

fmemopen is around for a while now, it should work with many libc implementations these days.

?