Unix 下常見的處理信號

No    Name                Default Action          Description
 1     SIGHUP             terminate process       terminal line hangup
 2     SIGINT               terminate process       interrupt program
 3     SIGQUIT            create core image       quit program
 4     SIGILL                create core image       illegal instruction
 5     SIGTRAP           create core image       trace trap
 6     SIGABRT           create core image       abort program (formerly SIGIOT)
 7     SIGEMT             create core image       emulate instruction executed
 8     SIGFPE              create core image       floating-point exception
 9     SIGKILL             terminate process       kill program
 10    SIGBUS            create core image       bus error
 11    SIGSEGV          create core image       segmentation violation
 12    SIGSYS             create core image       non-existent system call invoked
 13    SIGPIPE            terminate process       write on a pipe with no reader
 14    SIGALRM          terminate process       real-time timer expired
 15    SIGTERM          terminate process       software termination signal
 16    SIGURG            discard signal          urgent condition present on socket
 17    SIGSTOP          stop process            stop (cannot be caught or ignored)
 18    SIGTSTP           stop process            stop signal generated from keyboard
 19    SIGCONT          discard signal          continue after stop
 20    SIGCHLD          discard signal          child status has changed
 21    SIGTTIN            stop process            background read attempted from control terminal
 22    SIGTTOU          stop process            background write attempted to control terminal
 23    SIGIO                 discard signal          I/O is possible on a descriptor (see fcntl(2))
 24    SIGXCPU          terminate process       cpu time limit exceeded (see setrlimit(2))
 25    SIGXFSZ           terminate process       file size limit exceeded (see setrlimit(2))
 26    SIGVTALRM     terminate process       virtual time alarm (see setitimer(2))
 27    SIGPROF           terminate process       profiling timer alarm (see setitimer(2))
 28    SIGWINCH        discard signal          Window size change
 29    SIGINFO            discard signal          status request from keyboard
 30    SIGUSR1           terminate process       User defined signal 1
 31    SIGUSR2           terminate process       User defined signal 2