| 1 | /* The <signal.h> header defines all the ANSI and POSIX signals.
|
|---|
| 2 | * MINIX supports all the signals required by POSIX. They are defined below.
|
|---|
| 3 | * Some additional signals are also supported.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | #ifndef _SIGNAL_H
|
|---|
| 7 | #define _SIGNAL_H
|
|---|
| 8 |
|
|---|
| 9 | #ifndef _ANSI_H
|
|---|
| 10 | #include <ansi.h>
|
|---|
| 11 | #endif
|
|---|
| 12 | #ifdef _POSIX_SOURCE
|
|---|
| 13 | #ifndef _TYPES_H
|
|---|
| 14 | #include <sys/types.h>
|
|---|
| 15 | #endif
|
|---|
| 16 | #endif
|
|---|
| 17 |
|
|---|
| 18 | /* Here are types that are closely associated with signal handling. */
|
|---|
| 19 | typedef int sig_atomic_t;
|
|---|
| 20 |
|
|---|
| 21 | #ifdef _POSIX_SOURCE
|
|---|
| 22 | #ifndef _SIGSET_T
|
|---|
| 23 | #define _SIGSET_T
|
|---|
| 24 | typedef unsigned long sigset_t;
|
|---|
| 25 | #endif
|
|---|
| 26 | #endif
|
|---|
| 27 |
|
|---|
| 28 | #define _NSIG 20 /* number of signals used */
|
|---|
| 29 |
|
|---|
| 30 | #define SIGHUP 1 /* hangup */
|
|---|
| 31 | #define SIGINT 2 /* interrupt (DEL) */
|
|---|
| 32 | #define SIGQUIT 3 /* quit (ASCII FS) */
|
|---|
| 33 | #define SIGILL 4 /* illegal instruction */
|
|---|
| 34 | #define SIGTRAP 5 /* trace trap (not reset when caught) */
|
|---|
| 35 | #define SIGABRT 6 /* IOT instruction */
|
|---|
| 36 | #define SIGIOT 6 /* SIGABRT for people who speak PDP-11 */
|
|---|
| 37 | #define SIGUNUSED 7 /* spare code */
|
|---|
| 38 | #define SIGFPE 8 /* floating point exception */
|
|---|
| 39 | #define SIGKILL 9 /* kill (cannot be caught or ignored) */
|
|---|
| 40 | #define SIGUSR1 10 /* user defined signal # 1 */
|
|---|
| 41 | #define SIGSEGV 11 /* segmentation violation */
|
|---|
| 42 | #define SIGUSR2 12 /* user defined signal # 2 */
|
|---|
| 43 | #define SIGPIPE 13 /* write on a pipe with no one to read it */
|
|---|
| 44 | #define SIGALRM 14 /* alarm clock */
|
|---|
| 45 | #define SIGTERM 15 /* software termination signal from kill */
|
|---|
| 46 | #define SIGCHLD 17 /* child process terminated or stopped */
|
|---|
| 47 |
|
|---|
| 48 | #define SIGEMT 7 /* obsolete */
|
|---|
| 49 | #define SIGBUS 10 /* obsolete */
|
|---|
| 50 |
|
|---|
| 51 | /* MINIX specific signals. These signals are not used by user proceses,
|
|---|
| 52 | * but meant to inform system processes, like the PM, about system events.
|
|---|
| 53 | */
|
|---|
| 54 | #define SIGKMESS 18 /* new kernel message */
|
|---|
| 55 | #define SIGKSIG 19 /* kernel signal pending */
|
|---|
| 56 | #define SIGKSTOP 20 /* kernel shutting down */
|
|---|
| 57 |
|
|---|
| 58 | /* POSIX requires the following signals to be defined, even if they are
|
|---|
| 59 | * not supported. Here are the definitions, but they are not supported.
|
|---|
| 60 | */
|
|---|
| 61 | #define SIGCONT 18 /* continue if stopped */
|
|---|
| 62 | #define SIGSTOP 19 /* stop signal */
|
|---|
| 63 | #define SIGTSTP 20 /* interactive stop signal */
|
|---|
| 64 | #define SIGTTIN 21 /* background process wants to read */
|
|---|
| 65 | #define SIGTTOU 22 /* background process wants to write */
|
|---|
| 66 |
|
|---|
| 67 | /* The sighandler_t type is not allowed unless _POSIX_SOURCE is defined. */
|
|---|
| 68 | typedef void _PROTOTYPE( (*__sighandler_t), (int) );
|
|---|
| 69 |
|
|---|
| 70 | /* Macros used as function pointers. */
|
|---|
| 71 | #define SIG_ERR ((__sighandler_t) -1) /* error return */
|
|---|
| 72 | #define SIG_DFL ((__sighandler_t) 0) /* default signal handling */
|
|---|
| 73 | #define SIG_IGN ((__sighandler_t) 1) /* ignore signal */
|
|---|
| 74 | #define SIG_HOLD ((__sighandler_t) 2) /* block signal */
|
|---|
| 75 | #define SIG_CATCH ((__sighandler_t) 3) /* catch signal */
|
|---|
| 76 | #define SIG_MESS ((__sighandler_t) 4) /* pass as message (MINIX) */
|
|---|
| 77 |
|
|---|
| 78 | #ifdef _POSIX_SOURCE
|
|---|
| 79 | struct sigaction {
|
|---|
| 80 | __sighandler_t sa_handler; /* SIG_DFL, SIG_IGN, or pointer to function */
|
|---|
| 81 | sigset_t sa_mask; /* signals to be blocked during handler */
|
|---|
| 82 | int sa_flags; /* special flags */
|
|---|
| 83 | };
|
|---|
| 84 |
|
|---|
| 85 | /* Fields for sa_flags. */
|
|---|
| 86 | #define SA_ONSTACK 0x0001 /* deliver signal on alternate stack */
|
|---|
| 87 | #define SA_RESETHAND 0x0002 /* reset signal handler when signal caught */
|
|---|
| 88 | #define SA_NODEFER 0x0004 /* don't block signal while catching it */
|
|---|
| 89 | #define SA_RESTART 0x0008 /* automatic system call restart */
|
|---|
| 90 | #define SA_SIGINFO 0x0010 /* extended signal handling */
|
|---|
| 91 | #define SA_NOCLDWAIT 0x0020 /* don't create zombies */
|
|---|
| 92 | #define SA_NOCLDSTOP 0x0040 /* don't receive SIGCHLD when child stops */
|
|---|
| 93 |
|
|---|
| 94 | /* POSIX requires these values for use with sigprocmask(2). */
|
|---|
| 95 | #define SIG_BLOCK 0 /* for blocking signals */
|
|---|
| 96 | #define SIG_UNBLOCK 1 /* for unblocking signals */
|
|---|
| 97 | #define SIG_SETMASK 2 /* for setting the signal mask */
|
|---|
| 98 | #define SIG_INQUIRE 4 /* for internal use only */
|
|---|
| 99 | #endif /* _POSIX_SOURCE */
|
|---|
| 100 |
|
|---|
| 101 | /* POSIX and ANSI function prototypes. */
|
|---|
| 102 | _PROTOTYPE( int raise, (int _sig) );
|
|---|
| 103 | _PROTOTYPE( __sighandler_t signal, (int _sig, __sighandler_t _func) );
|
|---|
| 104 |
|
|---|
| 105 | #ifdef _POSIX_SOURCE
|
|---|
| 106 | _PROTOTYPE( int kill, (pid_t _pid, int _sig) );
|
|---|
| 107 | _PROTOTYPE( int sigaction,
|
|---|
| 108 | (int _sig, const struct sigaction *_act, struct sigaction *_oact) );
|
|---|
| 109 | _PROTOTYPE( int sigaddset, (sigset_t *_set, int _sig) );
|
|---|
| 110 | _PROTOTYPE( int sigdelset, (sigset_t *_set, int _sig) );
|
|---|
| 111 | _PROTOTYPE( int sigemptyset, (sigset_t *_set) );
|
|---|
| 112 | _PROTOTYPE( int sigfillset, (sigset_t *_set) );
|
|---|
| 113 | _PROTOTYPE( int sigismember, (const sigset_t *_set, int _sig) );
|
|---|
| 114 | _PROTOTYPE( int sigpending, (sigset_t *_set) );
|
|---|
| 115 | _PROTOTYPE( int sigprocmask,
|
|---|
| 116 | (int _how, const sigset_t *_set, sigset_t *_oset) );
|
|---|
| 117 | _PROTOTYPE( int sigsuspend, (const sigset_t *_sigmask) );
|
|---|
| 118 | #endif
|
|---|
| 119 |
|
|---|
| 120 | #endif /* _SIGNAL_H */
|
|---|
