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signal.h
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C/C++ Source or Header
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1993-08-16
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2KB
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61 lines
#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 */