2.11BSD#431 - /usr/src/sys/h/signal.h

   1: /*
   2:  * Copyright (c) 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	1.2 (2.11BSD) 1997/8/28
   7:  */
   8: 
   9: #ifndef NSIG
  10: #define NSIG    32
  11: 
  12: #define SIGHUP  1   /* hangup */
  13: #define SIGINT  2   /* interrupt */
  14: #define SIGQUIT 3   /* quit */
  15: #define SIGILL  4   /* illegal instruction (not reset when caught) */
  16: #define     ILL_RESAD_FAULT 0x0 /* reserved addressing fault */
  17: /* CHME, CHMS, CHMU are not yet given back to users reasonably */
  18: #define SIGTRAP 5   /* trace trap (not reset when caught) */
  19: #define SIGIOT  6   /* IOT instruction */
  20: #define SIGABRT SIGIOT  /* compatibility */
  21: #define SIGEMT  7   /* EMT instruction */
  22: #define SIGFPE  8   /* floating point exception */
  23: #define SIGKILL 9   /* kill (cannot be caught or ignored) */
  24: #define SIGBUS  10  /* bus error */
  25: #define SIGSEGV 11  /* segmentation violation */
  26: #define SIGSYS  12  /* bad argument to system call */
  27: #define SIGPIPE 13  /* write on a pipe with no one to read it */
  28: #define SIGALRM 14  /* alarm clock */
  29: #define SIGTERM 15  /* software termination signal from kill */
  30: #define SIGURG  16  /* urgent condition on IO channel */
  31: #define SIGSTOP 17  /* sendable stop signal not from tty */
  32: #define SIGTSTP 18  /* stop signal from tty */
  33: #define SIGCONT 19  /* continue a stopped process */
  34: #define SIGCHLD 20  /* to parent on child stop or exit */
  35: #define SIGCLD  SIGCHLD /* compatibility */
  36: #define SIGTTIN 21  /* to readers pgrp upon background tty read */
  37: #define SIGTTOU 22  /* like TTIN for output if (tp->t_local&LTOSTOP) */
  38: #define SIGIO   23  /* input/output possible signal */
  39: #define SIGXCPU 24  /* exceeded CPU time limit */
  40: #define SIGXFSZ 25  /* exceeded file size limit */
  41: #define SIGVTALRM 26    /* virtual time alarm */
  42: #define SIGPROF 27  /* profiling time alarm */
  43: #define SIGWINCH 28 /* window size changes */
  44: #define SIGUSR1 30  /* user defined signal 1 */
  45: #define SIGUSR2 31  /* user defined signal 2 */
  46: 
  47: #define SIG_ERR     (int (*)())-1
  48: #define SIG_DFL     (int (*)())0
  49: #define SIG_IGN     (int (*)())1
  50: 
  51: #ifndef KERNEL
  52: int (*signal())();
  53: #endif
  54: 
  55: typedef unsigned long sigset_t;
  56: 
  57: /*
  58:  * Signal vector "template" used in sigaction call.
  59:  */
  60: struct  sigaction {
  61:     int (*sa_handler)();    /* signal handler */
  62:     sigset_t sa_mask;       /* signal mask to apply */
  63:     int sa_flags;       /* see signal options below */
  64: };
  65: 
  66: #define SA_ONSTACK  0x0001  /* take signal on signal stack */
  67: #define SA_RESTART  0x0002  /* restart system on signal return */
  68: #define SA_DISABLE  0x0004  /* disable taking signals on alternate stack */
  69: #define SA_NOCLDSTOP    0x0008  /* do not generate SIGCHLD on child stop */
  70: 
  71: /*
  72:  * Flags for sigprocmask:
  73:  */
  74: #define SIG_BLOCK   1   /* block specified signal set */
  75: #define SIG_UNBLOCK 2   /* unblock specified signal set */
  76: #define SIG_SETMASK 3   /* set specified signal set */
  77: 
  78: typedef int (*sig_t)();     /* type of signal function */
  79: 
  80: /*
  81:  * Structure used in sigaltstack call.
  82:  */
  83: struct  sigaltstack {
  84:     char    *ss_base;       /* signal stack base */
  85:     int ss_size;        /* signal stack length */
  86:     int ss_flags;       /* SA_DISABLE and/or SA_ONSTACK */
  87: };
  88: #define MINSIGSTKSZ 128         /* minimum allowable stack */
  89: #define SIGSTKSZ    (MINSIGSTKSZ + 384) /* recommended stack size */
  90: 
  91: /*
  92:  * 4.3 compatibility:
  93:  * Signal vector "template" used in sigvec call.
  94:  */
  95: struct  sigvec {
  96:     int (*sv_handler)();    /* signal handler */
  97:     long    sv_mask;        /* signal mask to apply */
  98:     int sv_flags;       /* see signal options below */
  99: };
 100: #define SV_ONSTACK  SA_ONSTACK  /* take signal on signal stack */
 101: #define SV_INTERRUPT    SA_RESTART  /* same bit, opposite sense */
 102: #define sv_onstack sv_flags     /* isn't compatibility wonderful! */
 103: 
 104: /*
 105:  * 4.3 compatibility:
 106:  * Structure used in sigstack call.
 107:  */
 108: struct  sigstack {
 109:     char    *ss_sp;         /* signal stack pointer */
 110:     int ss_onstack;     /* current status */
 111: };
 112: 
 113: /*
 114:  * Information pushed on stack when a signal is delivered.
 115:  * This is used by the kernel to restore state following
 116:  * execution of the signal handler.  It is also made available
 117:  * to the handler to allow it to properly restore state if
 118:  * a non-standard exit is performed.
 119:  */
 120: struct  sigcontext {
 121:     int sc_onstack;     /* sigstack state to restore */
 122:     long    sc_mask;        /* signal mask to restore */
 123:     int sc_sp;          /* sp to restore */
 124:     int sc_fp;          /* fp to restore */
 125:     int sc_r1;          /* r1 to restore */
 126:     int sc_r0;          /* r0 to restore */
 127:     int sc_pc;          /* pc to restore */
 128:     int sc_ps;          /* psl to restore */
 129:     int sc_ovno         /* overlay to restore */
 130: };
 131: 
 132: /*
 133:  * Macro for converting signal number to a mask suitable for
 134:  * sigblock().
 135:  */
 136: #define sigmask(m)      (1L << ((m)-1))
 137: #define sigaddset(set, signo)   (*(set) |= 1L << ((signo) - 1), 0)
 138: #define sigdelset(set, signo)   (*(set) &= ~(1L << ((signo) - 1)), 0)
 139: #define sigemptyset(set)    (*(set) = (sigset_t)0, (int)0)
 140: #define sigfillset(set)         (*(set) = ~(sigset_t)0, (int)0)
 141: #define sigismember(set, signo) ((*(set) & (1L << ((signo) - 1))) != 0)
 142: 
 143: #ifndef KERNEL
 144: extern long sigblock(), sigsetmask();
 145: #define BADSIG  SIG_ERR
 146: #endif
 147: 
 148: #endif /* NSIG */

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