Plan 9 from Bell Labs’s /usr/web/sources/contrib/quanstro/root/sys/src/fs/port/print.c
#include "all.h" static Lock fmtl; void _fmtlock(void) { lock(&fmtl); } void _fmtunlock(void) { unlock(&fmtl); } int _efgfmt(Fmt*) { return -1; }