ref: af25b58d05b0700990057ce3f8c853bd43f2ece0 dir: /lib/c/stdio/setbuf.c/
#include <stdio.h> #undef setbuf void setbuf(FILE * restrict fp, char * restrict buf) { setvbuf(fp, buf, (buf) ? _IOFBF : _IONBF, BUFSIZ); }