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- #define NSIG 31 /* number of signals recognized */
-
- #define SIGNULL 0 /* not really a signal */
- #define SIGHUP 1 /* hangup signal */
- #define SIGINT 2 /* sent by ^C */
- #define SIGQUIT 3 /* quit signal */
- #define SIGILL 4 /* illegal instruction */
- #define SIGTRAP 5 /* trace trap */
- #define SIGABRT 6 /* abort signal */
- #define SIGPRIV 7 /* privilege violation */
- #define SIGFPE 8 /* divide by zero */
- #define SIGKILL 9 /* cannot be ignored */
- #define SIGBUS 10 /* bus error */
- #define SIGSEGV 11 /* illegal memory reference */
- #define SIGSYS 12 /* bad argument to a system call */
- #define SIGPIPE 13 /* broken pipe */
- #define SIGALRM 14 /* alarm clock */
- #define SIGTERM 15 /* software termination signal */
-
- #define SIGURG 16 /* urgent condition on I/O channel */
- #define SIGSTOP 17 /* stop signal not from terminal */
- #define SIGTSTP 18 /* stop signal from terminal */
- #define SIGCONT 19 /* continue stopped process */
- #define SIGCHLD 20 /* child stopped or exited */
- #define SIGTTIN 21 /* read by background process */
- #define SIGTTOU 22 /* write by background process */
- #define SIGIO 23 /* I/O possible on a descriptor */
- #define SIGXCPU 24 /* CPU time exhausted */
- #define SIGXFSZ 25 /* file size limited exceeded */
- #define SIGVTALRM 26 /* virtual timer alarm */
- #define SIGPROF 27 /* profiling timer expired */
- #define SIGWINCH 28 /* window size changed */
- #define SIGUSR1 29 /* user signal 1 */
- #define SIGUSR2 30 /* user signal 2 */
-
- #define SIG_DFL 0
- #define SIG_IGN 1
- #define SIG_ERR -1
-
- /* which signals are not maskable? */
- #define UNMASKABLE (1L | (1L << SIGKILL) | (1L << SIGCONT) | (1L << SIGSTOP))
-
- /* which signals are stop signals? */
- #define STOPSIGS ((1L<< SIGTTIN)|(1L<< SIGTTOU)|(1L<< SIGTSTP)|(1L<<SIGSTOP))
-
- /* sigaction: extended POSIX signal handling facility */
-
- struct sigaction {
- ulong sa_handler; /* pointer to signal handler */
- ulong sa_mask; /* additional signals masked during delivery */
- ushort sa_flags; /* signal specific flags */
- /* signal flags */
- #define SA_NOCLDSTOP 1 /* don't send SIGCHLD when child stops */
- #define SA_RESET 0x8000 /* reset to SIG_DFL just before delivery */
- };
-
-
- #define SAUSER (SA_NOCLDSTOP) /* signal flags which the process may set */
- #define SAPARENT (0) /* signal flags which the parent (of ptraced) processes may set */
- #define SAKERNEL (SA_RESET) /* kernel only flags */
-