ref: 9cdf8d4b4c9ecf24e8e065fdbf9a6aea48d5f4af dir: /lib/c/setbuf.c/
#include <stdio.h> #undef setbuf void setbuf(FILE * restrict fp, char * restrict buf) { setvbuf(fp, buf, (buf) ? _IOFBF : _IONBF, BUFSIZ); }