github.com/afumu/libc@v0.0.6/musl/src/stdio/setbuffer.c (about)

     1  #define _GNU_SOURCE
     2  #include <stdio.h>
     3  
     4  void setbuffer(FILE *f, char *buf, size_t size)
     5  {
     6  	setvbuf(f, buf, buf ? _IOFBF : _IONBF, size);
     7  }