ref: 1b44caa0c40d7b722a7d9edd0a6eaefe1616c4b0 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; }