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Annotation of 43BSDTahoe/sys/h/signal.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)signal.h    7.3 (Berkeley) 5/14/88
        !             7:  */
        !             8: 
        !             9: #ifndef        NSIG
        !            10: #define NSIG   32
        !            11: 
        !            12: #ifdef KERNEL
        !            13: #include "../machine/trap.h"   /* codes for SIGILL, SIGFPE */
        !            14: #else
        !            15: #include <machine/trap.h>      /* codes for SIGILL, SIGFPE */
        !            16: #endif
        !            17: 
        !            18: #define        SIGHUP  1       /* hangup */
        !            19: #define        SIGINT  2       /* interrupt */
        !            20: #define        SIGQUIT 3       /* quit */
        !            21: #define        SIGILL  4       /* illegal instruction (not reset when caught) */
        !            22: #define        SIGTRAP 5       /* trace trap (not reset when caught) */
        !            23: #define        SIGIOT  6       /* IOT instruction */
        !            24: #define        SIGABRT SIGIOT  /* compatibility */
        !            25: #define        SIGEMT  7       /* EMT instruction */
        !            26: #define        SIGFPE  8       /* floating point exception */
        !            27: #define        SIGKILL 9       /* kill (cannot be caught or ignored) */
        !            28: #define        SIGBUS  10      /* bus error */
        !            29: #define        SIGSEGV 11      /* segmentation violation */
        !            30: #define        SIGSYS  12      /* bad argument to system call */
        !            31: #define        SIGPIPE 13      /* write on a pipe with no one to read it */
        !            32: #define        SIGALRM 14      /* alarm clock */
        !            33: #define        SIGTERM 15      /* software termination signal from kill */
        !            34: #define        SIGURG  16      /* urgent condition on IO channel */
        !            35: #define        SIGSTOP 17      /* sendable stop signal not from tty */
        !            36: #define        SIGTSTP 18      /* stop signal from tty */
        !            37: #define        SIGCONT 19      /* continue a stopped process */
        !            38: #define        SIGCHLD 20      /* to parent on child stop or exit */
        !            39: #define        SIGCLD  SIGCHLD /* compatibility */
        !            40: #define        SIGTTIN 21      /* to readers pgrp upon background tty read */
        !            41: #define        SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
        !            42: #define        SIGIO   23      /* input/output possible signal */
        !            43: #define        SIGXCPU 24      /* exceeded CPU time limit */
        !            44: #define        SIGXFSZ 25      /* exceeded file size limit */
        !            45: #define        SIGVTALRM 26    /* virtual time alarm */
        !            46: #define        SIGPROF 27      /* profiling time alarm */
        !            47: #define SIGWINCH 28    /* window size changes */
        !            48: #define SIGUSR1 30     /* user defined signal 1 */
        !            49: #define SIGUSR2 31     /* user defined signal 2 */
        !            50: 
        !            51: #ifndef KERNEL
        !            52: int    (*signal())();
        !            53: #endif
        !            54: 
        !            55: /*
        !            56:  * Signal vector "template" used in sigvec call.
        !            57:  */
        !            58: struct sigvec {
        !            59:        int     (*sv_handler)();        /* signal handler */
        !            60:        int     sv_mask;                /* signal mask to apply */
        !            61:        int     sv_flags;               /* see signal options below */
        !            62: };
        !            63: #define SV_ONSTACK     0x0001  /* take signal on signal stack */
        !            64: #define SV_INTERRUPT   0x0002  /* do not restart system on signal return */
        !            65: #define sv_onstack sv_flags    /* isn't compatibility wonderful! */
        !            66: 
        !            67: /*
        !            68:  * Structure used in sigstack call.
        !            69:  */
        !            70: struct sigstack {
        !            71:        char    *ss_sp;                 /* signal stack pointer */
        !            72:        int     ss_onstack;             /* current status */
        !            73: };
        !            74: 
        !            75: /*
        !            76:  * Information pushed on stack when a signal is delivered.
        !            77:  * This is used by the kernel to restore state following
        !            78:  * execution of the signal handler.  It is also made available
        !            79:  * to the handler to allow it to properly restore state if
        !            80:  * a non-standard exit is performed.
        !            81:  */
        !            82: struct sigcontext {
        !            83:        int     sc_onstack;             /* sigstack state to restore */
        !            84:        int     sc_mask;                /* signal mask to restore */
        !            85:        int     sc_sp;                  /* sp to restore */
        !            86:        int     sc_fp;                  /* fp to restore */
        !            87:        int     sc_ap;                  /* ap to restore */
        !            88:        int     sc_pc;                  /* pc to restore */
        !            89:        int     sc_ps;                  /* psl to restore */
        !            90: };
        !            91: 
        !            92: #define        BADSIG          (int (*)())-1
        !            93: #define        SIG_DFL         (int (*)())0
        !            94: #define        SIG_IGN         (int (*)())1
        !            95: 
        !            96: #ifdef KERNEL
        !            97: #define        SIG_CATCH       (int (*)())2
        !            98: #define        SIG_HOLD        (int (*)())3
        !            99: #endif
        !           100: #endif
        !           101: 
        !           102: /*
        !           103:  * Macro for converting signal number to a mask suitable for
        !           104:  * sigblock().
        !           105:  */
        !           106: #define sigmask(m)     (1 << ((m)-1))

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