ref: 11b5c4b8bf0a15777e9a7f2292f6c80f5a7b4a2d dir: /sys/src/ape/lib/ap/plan9/sigpending.c/
#include <signal.h> /* * BUG: don't keep track of these */ int sigpending(sigset_t *set) { *set = 0; return 0; }