ref: c2a5d7e3f28e86aeef1e4e37e2b88e46af90b62c 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; }