ref: 0ab5d34be4b8b9faa96d4691de95d6ae8c691f0b 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; }