FreeBSD/Linux Kernel Cross Reference
sys/bsd/sys/signal.h

     /*
      * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
     * Version 2.0 (the 'License'). You may not use this file except in
     * compliance with the License. Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this
     * file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_LICENSE_HEADER_END@
     */
    /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
    /*
     * Copyright (c) 1982, 1986, 1989, 1991, 1993
     *      The Regents of the University of California.  All rights reserved.
     * (c) UNIX System Laboratories, Inc.
     * All or some portions of this file are derived from material licensed
     * to the University of California by American Telephone and Telegraph
     * Co. or Unix System Laboratories, Inc. and are reproduced herein with
     * the permission of UNIX System Laboratories, Inc.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)signal.h    8.2 (Berkeley) 1/21/94
     */
    
    #ifndef _SYS_SIGNAL_H_
    #define _SYS_SIGNAL_H_
    
    #include <sys/appleapiopts.h>
    
    #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
    #define NSIG    32              /* counting 0; could be 33 (mask is 1-32) */
    #endif
    
    #include <machine/signal.h>     /* sigcontext; codes for SIGILL, SIGFPE */
    
    #define SIGHUP  1       /* hangup */
    #define SIGINT  2       /* interrupt */
    #define SIGQUIT 3       /* quit */
    #define SIGILL  4       /* illegal instruction (not reset when caught) */
    #if  !defined(_POSIX_SOURCE)
    #define SIGTRAP 5       /* trace trap (not reset when caught) */
    #endif
    #define SIGABRT 6       /* abort() */
    #if  !defined(_POSIX_SOURCE)
    #define SIGIOT  SIGABRT /* compatibility */
    #define SIGEMT  7       /* EMT instruction */
    #endif
    #define SIGFPE  8       /* floating point exception */
    #define SIGKILL 9       /* kill (cannot be caught or ignored) */
    #if  !defined(_POSIX_SOURCE)
    #define SIGBUS  10      /* bus error */
    #endif
    #define SIGSEGV 11      /* segmentation violation */
    #if  !defined(_POSIX_SOURCE)
    #define SIGSYS  12      /* bad argument to system call */
    #endif
    #define SIGPIPE 13      /* write on a pipe with no one to read it */
    #define SIGALRM 14      /* alarm clock */
   #define SIGTERM 15      /* software termination signal from kill */
   #if  !defined(_POSIX_SOURCE)
   #define SIGURG  16      /* urgent condition on IO channel */
   #endif
   #define SIGSTOP 17      /* sendable stop signal not from tty */
   #define SIGTSTP 18      /* stop signal from tty */
   #define SIGCONT 19      /* continue a stopped process */
   #define SIGCHLD 20      /* to parent on child stop or exit */
   #define SIGTTIN 21      /* to readers pgrp upon background tty read */
   #define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
   #if  !defined(_POSIX_SOURCE)
   #define SIGIO   23      /* input/output possible signal */
   #define SIGXCPU 24      /* exceeded CPU time limit */
   #define SIGXFSZ 25      /* exceeded file size limit */
   #define SIGVTALRM 26    /* virtual time alarm */
   #define SIGPROF 27      /* profiling time alarm */
   #define SIGWINCH 28     /* window size changes */
   #define SIGINFO 29      /* information request */
   #endif
   #define SIGUSR1 30      /* user defined signal 1 */
   #define SIGUSR2 31      /* user defined signal 2 */
   
   #if defined(_ANSI_SOURCE) || defined(__cplusplus)
   /*
    * Language spec sez we must list exactly one parameter, even though we
    * actually supply three.  Ugh!
    */
   #define SIG_DFL         (void (*)(int))0
   #define SIG_IGN         (void (*)(int))1
   #define SIG_ERR         (void (*)(int))-1
   #else
   #define SIG_DFL         (void (*)())0
   #define SIG_IGN         (void (*)())1
   #define SIG_ERR         (void (*)())-1
   #endif
   
   #ifndef _ANSI_SOURCE
   #include <sys/types.h>
   
   typedef unsigned int sigset_t;
   
   union sigval {
           /* Members as suggested by Annex C of POSIX 1003.1b. */
           int     sigval_int;
           void    *sigval_ptr;
   };
   
   #define SIGEV_NONE              0               /* No async notification */
   #define SIGEV_SIGNAL    1               /* aio - completion notification */
   #ifdef __APPLE_API_PRIVATE
   #define SIGEV_THREAD    3               /* A notification function will be called to perform notification */
   #endif /*__APPLE_API_PRIVATE */
   
   struct sigevent {
           int                             sigev_notify;                           /* Notification type */
           int                             sigev_signo;                            /* Signal number */
           union sigval    sigev_value;                            /* Signal value */
           void                    (*sigev_notify_function)(union sigval);   /* Notification function */
           pthread_attr_t  *sigev_notify_attributes;       /* Notification attributes */
   };
   
   typedef struct __siginfo {
           int     si_signo;               /* signal number */
           int     si_errno;               /* errno association */
           int     si_code;                /* signal code */
           int     si_pid;                 /* sending process */
           unsigned int si_uid;            /* sender's ruid */
           int     si_status;              /* exit value */
           void    *si_addr;               /* faulting instruction */
           union sigval si_value;          /* signal value */
           long    si_band;                /* band event for SIGPOLL */
           unsigned int    pad[7];         /* Reserved for Future Use */
   } siginfo_t;
   
   /* 
    * Incase of SIGILL and SIGFPE, si_addr contains the address of 
    *  faulting instruction.
    * Incase of SIGSEGV and SIGBUS, si_addr contains address of 
    *  faulting memory reference.
    * Incase of SIGCHLD, si_pid willhave child process ID,
    *  si_status will contain exit value or signal.
    *  si_uid contains real user ID of the process that sent the signal
    */
   
   /* Values for si_code */
   
   /* Codes for SIGILL */
   #define ILL_NOOP        0       /* if only I knew... */
   #define ILL_ILLOPC      1       /* illegal opcode */
   #define ILL_ILLTRP      2       /* illegal trap */
   #define ILL_PRVOPC      3       /* privileged opcode */
   
   /* Codes for SIGFPE */
   #define FPE_NOOP        0       /* if only I knew... */
   #define FPE_FLTDIV      1       /* floating point divide by zero */
   #define FPE_FLTOVF      2       /* floating point overflow */
   #define FPE_FLTUND      3       /* floating point underflow */
   #define FPE_FLTRES      4       /* floating point inexact result */
   #define FPE_FLTINV      5       /* invalid floating point operation */
   
   /* Codes for SIGSEGV */
   #define SEGV_NOOP       0       /* if only I knew... */
   #define SEGV_MAPERR     1       /* address not mapped to object */
   #define SEGV_ACCERR     2       /* invalid permissions for mapped to object */
   
   /* Codes for SIGBUS */
   #define BUS_NOOP        0       /* if only I knew... */
   #define BUS_ADRALN      1       /* invalid address alignment */
   
   /* Codes for SIGCHLD */
   #define CLD_NOOP        0       /* if only I knew... */
   #define CLD_EXITED      1       /* child has exited */
   #define CLD_KILLED      2       
           /* child has terminated abnormally and did not create a core file */
   #define CLD_DUMPED      3       
           /* child has terminated abnormally and create a core file */
   #define CLD_TRAPPED     4       /* traced child has trapped */
   #define CLD_STOPPED     5       /* child has stopped */
   #define CLD_CONTINUED   6       /* stopped child has continued */
   
   /* union for signal handlers */
   union __sigaction_u {
           void    (*__sa_handler)(int);
           void    (*__sa_sigaction)(int, struct __siginfo *,
                          void *);
   };
   
   /* Signal vector template for Kernel user boundary */
   struct  __sigaction {
           union __sigaction_u __sigaction_u;  /* signal handler */
           void    (*sa_tramp)(void *, int, int, siginfo_t *, void *);
           sigset_t sa_mask;               /* signal mask to apply */
           int     sa_flags;               /* see signal options below */
   };
   
   /*
    * Signal vector "template" used in sigaction call.
    */
   struct  sigaction {
           union __sigaction_u __sigaction_u;  /* signal handler */
           sigset_t sa_mask;               /* signal mask to apply */
           int     sa_flags;               /* see signal options below */
   };
   /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
   #define sa_handler      __sigaction_u.__sa_handler
   #define sa_sigaction    __sigaction_u.__sa_sigaction
   
   
   #if  !defined(_POSIX_SOURCE)
   #define SA_ONSTACK      0x0001  /* take signal on signal stack */
   #define SA_RESTART      0x0002  /* restart system on signal return */
   #define SA_DISABLE      0x0004  /* disable taking signals on alternate stack */
   #define SA_RESETHAND    0x0004  /* reset to SIG_DFL when taking signal */
   #define SA_NODEFER      0x0010  /* don't mask the signal we're delivering */
   #define SA_NOCLDWAIT    0x0020  /* don't keep zombies around */
   #define SA_SIGINFO      0x0040  /* signal handler with SA_SIGINFO args */
   #define SA_USERTRAMP    0x0100  /* do not bounce off kernel's sigtramp */
   /* This will provide 64bit register set in a 32bit user address space */
   #define SA_64REGSET     0x0200  /* signal handler with SA_SIGINFO args with 64bit regs information */
   #endif
   #define SA_NOCLDSTOP    0x0008  /* do not generate SIGCHLD on child stop */
   
   /*
    * Flags for sigprocmask:
    */
   #define SIG_BLOCK       1       /* block specified signal set */
   #define SIG_UNBLOCK     2       /* unblock specified signal set */
   #define SIG_SETMASK     3       /* set specified signal set */
   
   /* POSIX 1003.1b required values. */
   #define SI_USER         0x10001
   #define SI_QUEUE        0x10002
   #define SI_TIMER        0x10003
   #define SI_ASYNCIO      0x10004
   #define SI_MESGQ        0x10005
   
   #if !defined(_POSIX_SOURCE)
   #include <sys/cdefs.h>
   typedef void (*sig_t) __P((int));       /* type of signal function */
   
   /*
    * Structure used in sigaltstack call.
    */
   struct  sigaltstack {
           char    *ss_sp;         /* signal stack base */
           int     ss_size;                /* signal stack length */
           int     ss_flags;               /* SA_DISABLE and/or SA_ONSTACK */
   };
   
   typedef struct  sigaltstack stack_t;
   
   #define SS_ONSTACK      0x0001  /* take signal on signal stack */
   #define SS_DISABLE      0x0004  /* disable taking signals on alternate stack */
   #define MINSIGSTKSZ     32768   /* (32K)minimum allowable stack */
   #define SIGSTKSZ        131072  /* (128K)recommended stack size */
   
   /*
    * 4.3 compatibility:
    * Signal vector "template" used in sigvec call.
    */
   struct  sigvec {
           void    (*sv_handler)(int);     /* signal handler */
           int     sv_mask;                /* signal mask to apply */
           int     sv_flags;               /* see signal options below */
   };
   
   #define SV_ONSTACK      SA_ONSTACK
   #define SV_INTERRUPT    SA_RESTART      /* same bit, opposite sense */
   #define SV_RESETHAND    SA_RESETHAND
   #define SV_NODEFER      SA_NODEFER
   #define SV_NOCLDSTOP    SA_NOCLDSTOP
   #define SV_SIGINFO      SA_SIGINFO
   
   #define sv_onstack sv_flags     /* isn't compatibility wonderful! */
   
   /*
    * Structure used in sigstack call.
    */
   struct  sigstack {
           char    *ss_sp;                 /* signal stack pointer */
           int     ss_onstack;             /* current status */
   };
   
   /*
    * Macro for converting signal number to a mask suitable for
    * sigblock().
    */
   #define sigmask(m)      (1 << ((m)-1))
   
   #ifdef  KERNEL
   #ifdef __APPLE_API_PRIVATE
   /*
    *      signals delivered on a per-thread basis.
    */
   #define threadmask (sigmask(SIGILL)|sigmask(SIGTRAP)|\
                       sigmask(SIGIOT)|sigmask(SIGEMT)|\
                       sigmask(SIGFPE)|sigmask(SIGBUS)|\
                       sigmask(SIGSEGV)|sigmask(SIGSYS)|\
                       sigmask(SIGPIPE))
   #endif /* __APPLE_API_PRIVATE */
   #endif  /* KERNEL */
   
   #define BADSIG          SIG_ERR
   
   #endif  /* !_POSIX_SOURCE */
   #endif  /* !_ANSI_SOURCE */
   
   /*
    * For historical reasons; programs expect signal's return value to be
    * defined by <sys/signal.h>.
    */
   __BEGIN_DECLS
   void    (*signal __P((int, void (*) __P((int))))) __P((int));
   __END_DECLS
   #endif  /* !_SYS_SIGNAL_H_ */

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