ref: 47c48b42c3463844a3fa0ca0a9d6dbc8a2e8b0f6 dir: /sys/src/ape/lib/ap/plan9/sigsuspend.c/
#include <signal.h> #include <errno.h> /* * BUG: doesn't work */ int sigsuspend(sigset_t *) { errno = EINVAL; return -1; }