ref: 3f9d5e4a4f9e4f0b5fe66e4a6745a4b8c5f6e447 dir: /sys/src/libstdio/fileno.c/
/* * Posix stdio -- fileno */ #include "iolib.h" int fileno(FILE *f){ if(f==NULL) return -1; else return f->fd; }