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#ifndef SIG_H
#define SIG_H
extern int sig_alarm;
extern int sig_child;
extern int sig_cont;
extern int sig_hangup;
extern int sig_pipe;
extern int sig_term;
extern void (*sig_defaulthandler)();
extern void (*sig_ignorehandler)();
extern void sig_catch(int,void (*)());
#define sig_ignore(s) (sig_catch((s),sig_ignorehandler))
#define sig_uncatch(s) (sig_catch((s),sig_defaulthandler))
extern void sig_block(int);
extern void sig_unblock(int);
extern void sig_blocknone(void);
extern void sig_pause(void);
extern void sig_dfl(int);
#endif
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