Plan 9 from Bell Labs’s /usr/web/sources/plan9/sys/src/cmd/unix/drawterm/kern/uart.c
#include "u.h" #include "lib.h" #include "dat.h" #include "fns.h" #include "error.h" extern int panicking; void uartputs(char *s, int n) { if(panicking) write(1, s, n); }