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Annotation of Net2/sys/signalvar.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1991 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)signalvar.h 7.1 (Berkeley) 5/9/91
        !            34:  */
        !            35: 
        !            36: #ifndef        _SIGNALVAR_H_           /* tmp for user.h */
        !            37: #define        _SIGNALVAR_H_
        !            38: 
        !            39: /*
        !            40:  * Kernel signal definitions and data structures,
        !            41:  * not exported to user programs.
        !            42:  */
        !            43: 
        !            44: /*
        !            45:  * Process signal actions and state, needed only within the process
        !            46:  * (not necessarily resident).
        !            47:  */
        !            48: struct sigacts {
        !            49:        sig_t   ps_sigact[NSIG];        /* disposition of signals */
        !            50:        sigset_t ps_catchmask[NSIG];    /* signals to be blocked */
        !            51:        sigset_t ps_sigonstack;         /* signals to take on sigstack */
        !            52:        sigset_t ps_sigintr;            /* signals that interrupt syscalls */
        !            53:        sigset_t ps_oldmask;            /* saved mask from before sigpause */
        !            54:        int     ps_flags;               /* signal flags, below */
        !            55:        struct  sigstack ps_sigstack;   /* sp & on stack state variable */
        !            56:        int     ps_sig;                 /* for core dump/debugger XXX */
        !            57:        int     ps_code;                /* for core dump/debugger XXX */
        !            58: };
        !            59: 
        !            60: #define        ps_onstack      ps_sigstack.ss_onstack
        !            61: #define        ps_sigsp        ps_sigstack.ss_sp
        !            62: 
        !            63: /* signal flags */
        !            64: #define        SA_OLDMASK      0x01            /* need to restore mask before pause */
        !            65: 
        !            66: /* additional signal action values, used only temporarily/internally */
        !            67: #define        SIG_CATCH       (void (*)())2
        !            68: #define        SIG_HOLD        (void (*)())3
        !            69: 
        !            70: /*
        !            71:  * get signal action for process and signal; currently only for current process
        !            72:  */
        !            73: #define SIGACTION(p, sig)      (p->p_sigacts->ps_sigact[(sig)])
        !            74: 
        !            75: /*
        !            76:  * Determine signal that should be delivered to process p, the current process,
        !            77:  * 0 if none.  If there is a pending stop signal with default action,
        !            78:  * the process stops in issig().
        !            79:  */
        !            80: #define        CURSIG(p) \
        !            81:        (((p)->p_sig == 0 || \
        !            82:            ((p)->p_flag&STRC) == 0 && ((p)->p_sig &~ (p)->p_sigmask) == 0) ? \
        !            83:            0 : issig(p))
        !            84: 
        !            85: /*
        !            86:  * Clear a pending signal from a process.
        !            87:  */
        !            88: #define        CLRSIG(p, sig)  { (p)->p_sig &= ~sigmask(sig); }
        !            89: 
        !            90: /*
        !            91:  * Signal properties and actions.
        !            92:  * The array below categorizes the signals and their default actions
        !            93:  * according to the following properties:
        !            94:  */
        !            95: #define        SA_KILL         0x01            /* terminates process by default */
        !            96: #define        SA_CORE         0x02            /* ditto and coredumps */
        !            97: #define        SA_STOP         0x04            /* suspend process */
        !            98: #define        SA_TTYSTOP      (0x08|SA_STOP)  /* ditto, from tty */
        !            99: #define        SA_IGNORE       0x10            /* ignore by default */
        !           100: #define        SA_CONT         0x20            /* continue if suspended */
        !           101: #define        SA_CANTMASK     0x40            /* non-maskable, catchable */
        !           102: 
        !           103: #ifdef SIGPROP
        !           104: int sigprop[NSIG + 1] = {
        !           105:        0,                      /* unused */
        !           106:        SA_KILL,                /* SIGHUP */
        !           107:        SA_KILL,                /* SIGINT */
        !           108:        SA_KILL|SA_CORE,        /* SIGQUIT */
        !           109:        SA_KILL|SA_CORE,        /* SIGILL */
        !           110:        SA_KILL|SA_CORE,        /* SIGTRAP */
        !           111:        SA_KILL|SA_CORE,        /* SIGABRT */
        !           112:        SA_KILL|SA_CORE,        /* SIGEMT */
        !           113:        SA_KILL|SA_CORE,        /* SIGFPE */
        !           114:        SA_KILL,                /* SIGKILL */
        !           115:        SA_KILL|SA_CORE,        /* SIGBUS */
        !           116:        SA_KILL|SA_CORE,        /* SIGSEGV */
        !           117:        SA_KILL|SA_CORE,        /* SIGSYS */
        !           118:        SA_KILL,                /* SIGPIPE */
        !           119:        SA_KILL,                /* SIGALRM */
        !           120:        SA_KILL,                /* SIGTERM */
        !           121:        SA_IGNORE,              /* SIGURG */
        !           122:        SA_STOP,                /* SIGSTOP */
        !           123:        SA_TTYSTOP,             /* SIGTSTP */
        !           124:        SA_IGNORE|SA_CONT,      /* SIGCONT */
        !           125:        SA_IGNORE,              /* SIGCHLD */
        !           126:        SA_TTYSTOP,             /* SIGTTIN */
        !           127:        SA_TTYSTOP,             /* SIGTTOU */
        !           128:        SA_IGNORE,              /* SIGIO */
        !           129:        SA_KILL,                /* SIGXCPU */
        !           130:        SA_KILL,                /* SIGXFSZ */
        !           131:        SA_KILL,                /* SIGVTALRM */
        !           132:        SA_KILL,                /* SIGPROF */
        !           133:        SA_IGNORE,              /* SIGWINCH  */
        !           134:        SA_IGNORE,              /* SIGINFO */
        !           135:        SA_KILL,                /* SIGUSR1 */
        !           136:        SA_KILL,                /* SIGUSR2 */
        !           137: };
        !           138: 
        !           139: #define        stopsigmask     (sigmask(SIGSTOP)|sigmask(SIGTSTP)|\
        !           140:                         sigmask(SIGTTIN)|sigmask(SIGTTOU))
        !           141: #define        contsigmask     (sigmask(SIGCONT))
        !           142: 
        !           143: #endif /* SIGPROP */
        !           144: 
        !           145: #define        sigcantmask     (sigmask(SIGKILL)|sigmask(SIGSTOP))
        !           146: 
        !           147: #ifdef KERNEL
        !           148: /*
        !           149:  * Machine-independent functions:
        !           150:  */
        !           151: void   siginit __P((struct proc *p));
        !           152: void   execsigs __P((struct proc *p));
        !           153: void   gsignal __P((int pgid, int sig));
        !           154: void   pgsignal __P((struct pgrp *pgrp, int sig, int checkctty));
        !           155: void   trapsignal __P((struct proc *p, int sig, unsigned code));
        !           156: void   psignal __P((struct proc *p, int sig));
        !           157: int    issig __P((struct proc *p));
        !           158: void   psig __P((int sig));
        !           159: int    coredump __P((struct proc *p));
        !           160: 
        !           161: /*
        !           162:  * Machine-dependent functions:
        !           163:  */
        !           164: void   sendsig __P((sig_t action, int sig, int returnmask, unsigned code));
        !           165: #endif /* KERNEL */
        !           166: #endif /* !_SIGNALVAR_H_ */

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