ref: 3d0ebdc439039f1e01ee5fa0f75b1de1a12c12f1
dir: /sys/src/9/boot/boot.h/
enum { Debug = 0, }; extern void fatal(char*); extern int readfile(char*, char*, int); extern void run(char*, ...); extern void setenv(char*, char*, int); extern int writefile(char*, char*, int);