ref: a351bcdccdf5a4273bc8dc3360a48fbb8b8aa9ea
dir: /src/before.c/
#include <u.h> #include <libc.h> void main(int, char*[]) { int fd; fd = create("afile", OWRITE, 0644); write(fd, "hello\n", 6); if (fork() == 0) write(fd, "child\n", 6); else write(fd, "dad\n", 4); close(fd); exits(nil); }