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signal.h

#ifndef _SIGNAL_H
#if defined __need_sig_atomic_t || defined __need_sigset_t
# include <signal/signal.h>
#else
# include <signal/signal.h>

libc_hidden_proto (sigemptyset)
libc_hidden_proto (sigfillset)
libc_hidden_proto (sigismember)
libc_hidden_proto (__sigpause)
libc_hidden_proto (raise)
libc_hidden_proto (__libc_current_sigrtmin)
libc_hidden_proto (__libc_current_sigrtmax)

/* 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 __sigaction (int __sig, __const struct sigaction *__restrict __act,
                  struct sigaction *__restrict __oact);
libc_hidden_proto (__sigaction)
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);
libc_hidden_proto (__sigsuspend)
extern int __sigwait (__const sigset_t *__set, int *__sig);
libc_hidden_proto (__sigwait)
extern int __sigwaitinfo (__const sigset_t *__set, siginfo_t *__info);
libc_hidden_proto (__sigwaitinfo)
extern int __sigtimedwait (__const sigset_t *__set, siginfo_t *__info,
                     __const struct timespec *__timeout);
libc_hidden_proto (__sigtimedwait)
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);
extern int __libc_sigaction (int sig, const struct sigaction *act,
                       struct sigaction *oact);
libc_hidden_proto (__libc_sigaction)

extern int __sigpause (int sig_or_mask, int is_sig);
extern int __default_sigpause (int mask);
extern int __xpg_sigpause (int sig);



/* Allocate real-time signal with highest/lowest available priority.  */
extern int __libc_allocate_rtsig (int __high);
#endif
#endif

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