#ifndef SIG_H#define SIG_Hextern void sig_catch();extern void sig_block();extern void sig_unblock();extern void sig_blocknone();extern void sig_pause();extern void sig_dfl();extern void sig_miscignore();extern void sig_bugcatch();extern void sig_pipeignore();extern void sig_pipedefault();extern void sig_contblock();extern void sig_contunblock();extern void sig_contcatch();extern void sig_contdefault();extern void sig_termblock();extern void sig_termunblock();extern void sig_termcatch();extern void sig_termdefault();extern void sig_alarmblock();extern void sig_alarmunblock();extern void sig_alarmcatch();extern void sig_alarmdefault();extern void sig_childblock();extern void sig_childunblock();extern void sig_childcatch();extern void sig_childdefault();extern void sig_hangupblock();extern void sig_hangupunblock();extern void sig_hangupcatch();extern void sig_hangupdefault();#endif