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#ifndef _SIGNAL_H
#if defined __need_sig_atomic_t || defined __need_sigset_t
# include <signal/signal.h>
#else
# include <signal/signal.h>
/* Now define the internal interfaces. */
extern __sighandler_t __bsd_signal (int __sig, __sighandler_t __handler);
extern int __kill (__pid_t __pid, int __sig);
extern int __sigblock (int __mask);
extern int __sigsetmask (int __mask);
extern int __sigprocmask (int __how,
__const sigset_t *__set, sigset_t *__oset);
extern int __sigsuspend (__const sigset_t *__set);
extern int __sigwait (__const sigset_t *__set, int *__sig);
extern int __sigwaitinfo (__const sigset_t *__set, siginfo_t *__info);
extern int __sigtimedwait (__const sigset_t *__set, siginfo_t *__info,
__const struct timespec *__timeout);
extern int __sigqueue (__pid_t __pid, int __sig,
__const union sigval __val);
extern int __sigvec (int __sig, __const struct sigvec *__vec,
struct sigvec *__ovec);
extern int __sigreturn (struct sigcontext *__scp);
extern int __sigaltstack (__const struct sigaltstack *__ss,
struct sigaltstack *__oss);
/* Allocate real-time signal with highest/lowest available priority. */
extern int __libc_allocate_rtsig (int __high);
#endif
#endif
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