SIG_DFL           154 gtags-cscope/exec.c 		oldsigtstp = signal(SIGTSTP, SIG_DFL);
SIG_DFL           159 gtags-cscope/exec.c 		signal(SIGINT, SIG_DFL);
SIG_DFL           160 gtags-cscope/exec.c 		signal(SIGQUIT, SIG_DFL);
SIG_DFL           161 gtags-cscope/exec.c 		signal(SIGHUP, SIG_DFL);
SIG_DFL           163 gtags-cscope/exec.c 		signal(SIGTSTP, SIG_DFL);
SIG_DFL           174 gtags-cscope/mypopen.c 		tstat = signal(SIGTSTP, SIG_DFL);