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Annotation of 43BSDTahoe/sys/h/signal.h, revision 1.1.1.1

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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