ref: 9e3dbd0b075d3b8f48c6279c79e35d3e5963ea20 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; }