signal 441 lib/utilunix.c signal (SIGINT, SIG_DFL); signal 442 lib/utilunix.c signal (SIGQUIT, SIG_DFL); signal 443 lib/utilunix.c signal (SIGTSTP, SIG_DFL); signal 444 lib/utilunix.c signal (SIGCHLD, SIG_DFL); signal 486 src/main.c (void) signal (SIGCHLD, SIG_DFL); /* Disable the SIGCHLD handler */