oldset 37 usr/lib/posix/signal/sigprocmask.c sigprocmask(int how, const sigset_t *set, sigset_t *oldset) oldset 46 usr/lib/posix/signal/sigprocmask.c if (oldset != NULL) oldset 47 usr/lib/posix/signal/sigprocmask.c *oldset = __sig_mask;