ref: 0e54aa2a4df49f9a4fb7f1a275940332d3bee3c6 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; }