HelenOS sources

setbuf            183 uspace/lib/c/include/stdio.h extern void setbuf(FILE *, void *);
setbuf             78 uspace/lib/cpp/include/__bits/io/streambuf.hpp                 return setbuf(s, n);
setbuf            183 uspace/lib/posix/include/libc/stdio.h extern void setbuf(FILE *, void *);