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Annotation of sys/sys/signal.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: signal.h,v 1.19 2006/01/08 14:20:16 millert Exp $     */
                      2: /*     $NetBSD: signal.h,v 1.21 1996/02/09 18:25:32 christos Exp $     */
                      3:
                      4: /*
                      5:  * Copyright (c) 1982, 1986, 1989, 1991, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  * (c) UNIX System Laboratories, Inc.
                      8:  * All or some portions of this file are derived from material licensed
                      9:  * to the University of California by American Telephone and Telegraph
                     10:  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
                     11:  * the permission of UNIX System Laboratories, Inc.
                     12:  *
                     13:  * Redistribution and use in source and binary forms, with or without
                     14:  * modification, are permitted provided that the following conditions
                     15:  * are met:
                     16:  * 1. Redistributions of source code must retain the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer.
                     18:  * 2. Redistributions in binary form must reproduce the above copyright
                     19:  *    notice, this list of conditions and the following disclaimer in the
                     20:  *    documentation and/or other materials provided with the distribution.
                     21:  * 3. Neither the name of the University nor the names of its contributors
                     22:  *    may be used to endorse or promote products derived from this software
                     23:  *    without specific prior written permission.
                     24:  *
                     25:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     26:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     27:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     28:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     29:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     30:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     31:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     32:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     33:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     34:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     35:  * SUCH DAMAGE.
                     36:  *
                     37:  *     @(#)signal.h    8.2 (Berkeley) 1/21/94
                     38:  */
                     39:
                     40: #ifndef        _SYS_SIGNAL_H_
                     41: #define        _SYS_SIGNAL_H_
                     42:
                     43: #include <sys/cdefs.h>
                     44: #include <machine/signal.h>    /* sigcontext; codes for SIGILL, SIGFPE */
                     45:
                     46: #define _NSIG  32              /* counting 0; could be 33 (mask is 1-32) */
                     47:
                     48: #if __BSD_VISIBLE
                     49: #define NSIG _NSIG
                     50: #endif
                     51:
                     52: #define        SIGHUP  1       /* hangup */
                     53: #define        SIGINT  2       /* interrupt */
                     54: #define        SIGQUIT 3       /* quit */
                     55: #define        SIGILL  4       /* illegal instruction (not reset when caught) */
                     56: #define        SIGTRAP 5       /* trace trap (not reset when caught) */
                     57: #define        SIGABRT 6       /* abort() */
                     58: #if __BSD_VISIBLE
                     59: #define        SIGIOT  SIGABRT /* compatibility */
                     60: #define        SIGEMT  7       /* EMT instruction */
                     61: #endif
                     62: #define        SIGFPE  8       /* floating point exception */
                     63: #define        SIGKILL 9       /* kill (cannot be caught or ignored) */
                     64: #define        SIGBUS  10      /* bus error */
                     65: #define        SIGSEGV 11      /* segmentation violation */
                     66: #define        SIGSYS  12      /* bad argument to system call */
                     67: #define        SIGPIPE 13      /* write on a pipe with no one to read it */
                     68: #define        SIGALRM 14      /* alarm clock */
                     69: #define        SIGTERM 15      /* software termination signal from kill */
                     70: #define        SIGURG  16      /* urgent condition on IO channel */
                     71: #define        SIGSTOP 17      /* sendable stop signal not from tty */
                     72: #define        SIGTSTP 18      /* stop signal from tty */
                     73: #define        SIGCONT 19      /* continue a stopped process */
                     74: #define        SIGCHLD 20      /* to parent on child stop or exit */
                     75: #define        SIGTTIN 21      /* to readers pgrp upon background tty read */
                     76: #define        SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
                     77: #if __BSD_VISIBLE
                     78: #define        SIGIO   23      /* input/output possible signal */
                     79: #endif
                     80: #define        SIGXCPU 24      /* exceeded CPU time limit */
                     81: #define        SIGXFSZ 25      /* exceeded file size limit */
                     82: #define        SIGVTALRM 26    /* virtual time alarm */
                     83: #define        SIGPROF 27      /* profiling time alarm */
                     84: #if __BSD_VISIBLE
                     85: #define SIGWINCH 28    /* window size changes */
                     86: #define SIGINFO        29      /* information request */
                     87: #endif
                     88: #define SIGUSR1 30     /* user defined signal 1 */
                     89: #define SIGUSR2 31     /* user defined signal 2 */
                     90:
                     91: /*
                     92:  * Language spec says we must list exactly one parameter, even though we
                     93:  * actually supply three.  Ugh!
                     94:  */
                     95: #define        SIG_DFL         (void (*)(int))0
                     96: #define        SIG_IGN         (void (*)(int))1
                     97: #define        SIG_ERR         (void (*)(int))-1
                     98:
                     99: #if __POSIX_VISIBLE || __XPG_VISIBLE
                    100: typedef unsigned int sigset_t;
                    101:
                    102: #include <sys/siginfo.h>
                    103:
                    104: /*
                    105:  * Signal vector "template" used in sigaction call.
                    106:  */
                    107: struct sigaction {
                    108:        union {         /* signal handler */
                    109:                void    (*__sa_handler)(int);
                    110:                void    (*__sa_sigaction)(int, siginfo_t *, void *);
                    111:        } __sigaction_u;
                    112:        sigset_t sa_mask;               /* signal mask to apply */
                    113:        int     sa_flags;               /* see signal options below */
                    114: };
                    115:
                    116: /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
                    117: #define sa_handler      __sigaction_u.__sa_handler
                    118: #define sa_sigaction    __sigaction_u.__sa_sigaction
                    119:
                    120: #if __XPG_VISIBLE >= 500
                    121: #define SA_ONSTACK     0x0001  /* take signal on signal stack */
                    122: #define SA_RESTART     0x0002  /* restart system on signal return */
                    123: #define SA_RESETHAND   0x0004  /* reset to SIG_DFL when taking signal */
                    124: #define SA_NODEFER     0x0010  /* don't mask the signal we're delivering */
                    125: #define SA_NOCLDWAIT   0x0020  /* don't create zombies (assign to pid 1) */
                    126: #ifdef COMPAT_SUNOS
                    127: #define        SA_USERTRAMP    0x0100  /* do not bounce off kernel's sigtramp */
                    128: #endif
                    129: #endif /* __XPG_VISIBLE >= 500 */
                    130: #define SA_NOCLDSTOP   0x0008  /* do not generate SIGCHLD on child stop */
                    131: #if __POSIX_VISIBLE >= 199309 || __XPG_VISIBLE >= 500
                    132: #define SA_SIGINFO     0x0040  /* generate siginfo_t */
                    133: #endif
                    134:
                    135: /*
                    136:  * Flags for sigprocmask:
                    137:  */
                    138: #define        SIG_BLOCK       1       /* block specified signal set */
                    139: #define        SIG_UNBLOCK     2       /* unblock specified signal set */
                    140: #define        SIG_SETMASK     3       /* set specified signal set */
                    141: #endif /* __POSIX_VISIBLE || __XPG_VISIBLE */
                    142:
                    143: #if __BSD_VISIBLE
                    144: typedef        void (*sig_t)(int);     /* type of signal function */
                    145:
                    146: /*
                    147:  * 4.3 compatibility:
                    148:  * Signal vector "template" used in sigvec call.
                    149:  */
                    150: struct sigvec {
                    151:        void    (*sv_handler)(int);     /* signal handler */
                    152:        int     sv_mask;                /* signal mask to apply */
                    153:        int     sv_flags;               /* see signal options below */
                    154: };
                    155: #define SV_ONSTACK     SA_ONSTACK
                    156: #define SV_INTERRUPT   SA_RESTART      /* same bit, opposite sense */
                    157: #define SV_RESETHAND   SA_RESETHAND
                    158: #define sv_onstack     sv_flags        /* isn't compatibility wonderful! */
                    159:
                    160: /*
                    161:  * Macro for converting signal number to a mask suitable for
                    162:  * sigblock().
                    163:  */
                    164: #define sigmask(m)     (1 << ((m)-1))
                    165:
                    166: #define        BADSIG          SIG_ERR
                    167:
                    168: #endif /* __BSD_VISIBLE */
                    169:
                    170: #if __BSD_VISIBLE || __XPG_VISIBLE >= 420
                    171: /*
                    172:  * Structure used in sigstack call.
                    173:  */
                    174: struct sigstack {
                    175:        void    *ss_sp;                 /* signal stack pointer */
                    176:        int     ss_onstack;             /* current status */
                    177: };
                    178:
                    179: /*
                    180:  * Structure used in sigaltstack call.
                    181:  */
                    182: typedef struct sigaltstack {
                    183:        void    *ss_sp;                 /* signal stack base */
                    184:        size_t  ss_size;                /* signal stack length */
                    185:        int     ss_flags;               /* SS_DISABLE and/or SS_ONSTACK */
                    186: } stack_t;
                    187: #define SS_ONSTACK     0x0001  /* take signals on alternate stack */
                    188: #define SS_DISABLE     0x0004  /* disable taking signals on alternate stack */
                    189: #define        MINSIGSTKSZ     8192                    /* minimum allowable stack */
                    190: #define        SIGSTKSZ        (MINSIGSTKSZ + 32768)   /* recommended stack size */
                    191:
                    192: #ifdef _KERNEL
                    193: struct osigaltstack {
                    194:        void    *ss_sp;                 /* signal stack base */
                    195:        int     ss_size;                /* signal stack length */
                    196:        int     ss_flags;               /* SS_DISABLE and/or SS_ONSTACK */
                    197: };
                    198: #endif
                    199:
                    200: typedef struct sigcontext ucontext_t;
                    201: #endif /* __BSD_VISIBLE || __XPG_VISIBLE >= 420 */
                    202:
                    203: /*
                    204:  * For historical reasons; programs expect signal's return value to be
                    205:  * defined by <sys/signal.h>.
                    206:  */
                    207: __BEGIN_DECLS
                    208: void   (*signal(int, void (*)(int)))(int);
                    209: __END_DECLS
                    210: #endif /* !_SYS_SIGNAL_H_ */

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