ref: 5ebb1a29d8250027e8b7f2287f3bfa3a6f3d13ac dir: /sys/src/ape/lib/ap/plan9/sigsuspend.c/
#include <signal.h> #include <errno.h> /* * BUG: doesn't work */ int sigsuspend(sigset_t *set) { errno = EINVAL; return -1; }