bsd/sys/signal.h

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  23 /*
  24  * Copyright (c) 1982, 1986, 1989, 1991, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  * (c) UNIX System Laboratories, Inc.
  27  * All or some portions of this file are derived from material licensed
  28  * to the University of California by American Telephone and Telegraph
  29  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  30  * the permission of UNIX System Laboratories, Inc.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      @(#)signal.h    8.2 (Berkeley) 1/21/94
  61  */
  62
  63 #ifndef _SYS_SIGNAL_H_
  64 #define _SYS_SIGNAL_H_
  65
  66 #include <sys/cdefs.h>
  67 #include <sys/appleapiopts.h>
  68
  69 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
  70 #define NSIG    32              /* counting 0; could be 33 (mask is 1-32) */
  71 #endif
  72
  73 #include <machine/signal.h>     /* sigcontext; codes for SIGILL, SIGFPE */
  74
  75 #define SIGHUP  1       /* hangup */
  76 #define SIGINT  2       /* interrupt */
  77 #define SIGQUIT 3       /* quit */
  78 #define SIGILL  4       /* illegal instruction (not reset when caught) */
  79 #define SIGTRAP 5       /* trace trap (not reset when caught) */
  80 #define SIGABRT 6       /* abort() */
  81 #if  defined(_POSIX_C_SOURCE)
  82 #define SIGPOLL 7       /* pollable event ([XSR] generated, not supported) */
  83 #else   /* !_POSIX_C_SOURCE */
  84 #define SIGIOT  SIGABRT /* compatibility */
  85 #define SIGEMT  7       /* EMT instruction */
  86 #endif  /* !_POSIX_C_SOURCE */
  87 #define SIGFPE  8       /* floating point exception */
  88 #define SIGKILL 9       /* kill (cannot be caught or ignored) */
  89 #define SIGBUS  10      /* bus error */
  90 #define SIGSEGV 11      /* segmentation violation */
  91 #define SIGSYS  12      /* bad argument to system call */
  92 #define SIGPIPE 13      /* write on a pipe with no one to read it */
  93 #define SIGALRM 14      /* alarm clock */
  94 #define SIGTERM 15      /* software termination signal from kill */
  95 #define SIGURG  16      /* urgent condition on IO channel */
  96 #define SIGSTOP 17      /* sendable stop signal not from tty */
  97 #define SIGTSTP 18      /* stop signal from tty */
  98 #define SIGCONT 19      /* continue a stopped process */
  99 #define SIGCHLD 20      /* to parent on child stop or exit */
 100 #define SIGTTIN 21      /* to readers pgrp upon background tty read */
 101 #define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
 102 #if  !defined(_POSIX_C_SOURCE)
 103 #define SIGIO   23      /* input/output possible signal */
 104 #endif
 105 #define SIGXCPU 24      /* exceeded CPU time limit */
 106 #define SIGXFSZ 25      /* exceeded file size limit */
 107 #define SIGVTALRM 26    /* virtual time alarm */
 108 #define SIGPROF 27      /* profiling time alarm */
 109 #if  !defined(_POSIX_C_SOURCE)
 110 #define SIGWINCH 28     /* window size changes */
 111 #define SIGINFO 29      /* information request */
 112 #endif
 113 #define SIGUSR1 30      /* user defined signal 1 */
 114 #define SIGUSR2 31      /* user defined signal 2 */
 115
 116 #if defined(_ANSI_SOURCE) || defined(_POSIX_C_SOURCE) || defined(__cplusplus)
 117 /*
 118  * Language spec sez we must list exactly one parameter, even though we
 119  * actually supply three.  Ugh!
 120  * SIG_HOLD is chosen to avoid KERN_SIG_* values in <sys/signalvar.h>
 121  */
 122 #define SIG_DFL         (void (*)(int))0
 123 #define SIG_IGN         (void (*)(int))1
 124 #define SIG_HOLD        (void (*)(int))5
 125 #define SIG_ERR         ((void (*)(int))-1)
 126 #else
 127 /* DO NOT REMOVE THE COMMENTED OUT int: fixincludes needs to see them */
 128 #define SIG_DFL         (void (*)(/*int*/))0
 129 #define SIG_IGN         (void (*)(/*int*/))1
 130 #define SIG_HOLD        (void (*)(/*int*/))5
 131 #define SIG_ERR         ((void (*)(/*int*/))-1)
 132 #endif
 133
 134 #ifndef _ANSI_SOURCE
 135 #include <sys/_types.h>
 136
 137 #ifndef _MCONTEXT_T
 138 #define _MCONTEXT_T
 139 typedef __darwin_mcontext_t             mcontext_t;
 140 #endif
 141
 142 #ifndef _POSIX_C_SOURCE
 143 #ifndef _MCONTEXT64_T
 144 #define _MCONTEXT64_T
 145 typedef __darwin_mcontext64_t           mcontext64_t;
 146 #endif
 147 #endif /* _POSIX_C_SOURCE */
 148
 149 #ifndef _PID_T
 150 #define _PID_T
 151 typedef __darwin_pid_t                  pid_t;
 152 #endif
 153
 154 #ifndef _PTHREAD_ATTR_T
 155 #define _PTHREAD_ATTR_T
 156 typedef __darwin_pthread_attr_t         pthread_attr_t;
 157 #endif
 158
 159 #ifndef _SIGSET_T
 160 #define _SIGSET_T
 161 typedef __darwin_sigset_t               sigset_t;
 162 #endif
 163
 164 #ifndef _SIZE_T
 165 #define _SIZE_T
 166 typedef __darwin_size_t                 size_t;
 167 #endif
 168
 169 #ifndef _UCONTEXT_T
 170 #define _UCONTEXT_T
 171 typedef __darwin_ucontext_t             ucontext_t;
 172 #endif
 173
 174 #ifndef _POSIX_C_SOURCE
 175 #ifndef _UCONTEXT64_T
 176 #define _UCONTEXT64_T
 177 typedef __darwin_ucontext64_t           ucontext64_t;
 178 #endif
 179 #endif /* _POSIX_C_SOURCE */
 180
 181 #ifndef _UID_T
 182 #define _UID_T
 183 typedef __darwin_uid_t                  uid_t;
 184 #endif
 185
 186 union sigval {
 187         /* Members as suggested by Annex C of POSIX 1003.1b. */
 188         int     sival_int;
 189         void    *sival_ptr;
 190 };
 191
 192 #define SIGEV_NONE      0               /* No async notification */
 193 #define SIGEV_SIGNAL    1               /* aio - completion notification */
 194 #define SIGEV_THREAD    3               /* A notification function will be called to perform notification */
 195
 196 struct sigevent {
 197         int                             sigev_notify;                           /* Notification type */
 198         int                             sigev_signo;                            /* Signal number */
 199         union sigval    sigev_value;                            /* Signal value */
 200         void                    (*sigev_notify_function)(union sigval);   /* Notification function */
 201         pthread_attr_t  *sigev_notify_attributes;       /* Notification attributes */
 202 };
 203
 204 // LP64todo - should this move?
 205 #ifdef BSD_KERNEL_PRIVATE
 206
 207 #if __DARWIN_ALIGN_NATURAL
 208 #pragma options align=natural
 209 #endif
 210
 211 union user_sigval {
 212         struct {
 213                 int             pad;    /* assumes Motorolla byte order */
 214                 int             sival_int;
 215         } size_equivalent;
 216         user_addr_t     sival_ptr;
 217 };
 218
 219 struct user_sigevent {
 220         int             sigev_notify;                   /* Notification type */
 221         int             sigev_signo;                    /* Signal number */
 222         union user_sigval sigev_value;                  /* Signal value */
 223         user_addr_t     sigev_notify_function;          /* Notify function */
 224         user_addr_t     sigev_notify_attributes;        /* Notify attributes */
 225 };
 226
 227 #if __DARWIN_ALIGN_NATURAL
 228 #pragma options align=reset
 229 #endif
 230
 231 #endif  /* BSD_KERNEL_PRIVATE */
 232
 233 typedef struct __siginfo {
 234         int     si_signo;               /* signal number */
 235         int     si_errno;               /* errno association */
 236         int     si_code;                /* signal code */
 237         pid_t   si_pid;                 /* sending process */
 238         uid_t   si_uid;                 /* sender's ruid */
 239         int     si_status;              /* exit value */
 240         void    *si_addr;               /* faulting instruction */
 241         union sigval si_value;          /* signal value */
 242         long    si_band;                /* band event for SIGPOLL */
 243         unsigned long   pad[7];         /* Reserved for Future Use */
 244 } siginfo_t;
 245
 246 #ifdef BSD_KERNEL_PRIVATE
 247
 248 #if __DARWIN_ALIGN_NATURAL
 249 #pragma options align=natural
 250 #endif
 251
 252 typedef struct __user_siginfo {
 253         int             si_signo;       /* signal number */
 254         int             si_errno;       /* errno association */
 255         int             si_code;        /* signal code */
 256         pid_t           si_pid;         /* sending process */
 257         uid_t           si_uid;         /* sender's ruid */
 258         int             si_status;      /* exit value */
 259         user_addr_t     si_addr;        /* faulting instruction */
 260         union user_sigval si_value;     /* signal value */
 261         user_long_t     si_band;        /* band event for SIGPOLL */
 262         user_ulong_t    pad[7];         /* Reserved for Future Use */
 263 } user_siginfo_t;
 264
 265 #if __DARWIN_ALIGN_NATURAL
 266 #pragma options align=reset
 267 #endif
 268
 269 #endif  /* BSD_KERNEL_PRIVATE */
 270
 271 /*
 272  * Incase of SIGILL and SIGFPE, si_addr contains the address of
 273  *  faulting instruction.
 274  * Incase of SIGSEGV and SIGBUS, si_addr contains address of
 275  *  faulting memory reference.
 276  * Incase of SIGCHLD, si_pid willhave child process ID,
 277  *  si_status will contain exit value or signal.
 278  *  si_uid contains real user ID of the process that sent the signal
 279  */
 280
 281 /* Values for si_code */
 282
 283 /* Codes for SIGILL */
 284 #ifndef _POSIX_C_SOURCE
 285 #define ILL_NOOP        0       /* if only I knew... */
 286 #endif
 287 #define ILL_ILLOPC      1       /* [XSI] illegal opcode */
 288 #define ILL_ILLTRP      2       /* [XSI] illegal trap */
 289 #define ILL_PRVOPC      3       /* [XSI] privileged opcode */
 290 #define ILL_ILLOPN      4       /* [XSI] illegal operand -NOTIMP */
 291 #define ILL_ILLADR      5       /* [XSI] illegal addressing mode -NOTIMP */
 292 #define ILL_PRVREG      6       /* [XSI] privileged register -NOTIMP */
 293 #define ILL_COPROC      7       /* [XSI] coprocessor error -NOTIMP */
 294 #define ILL_BADSTK      8       /* [XSI] internal stack error -NOTIMP */
 295
 296 /* Codes for SIGFPE */
 297 #ifndef _POSIX_C_SOURCE
 298 #define FPE_NOOP        0       /* if only I knew... */
 299 #endif
 300 #define FPE_FLTDIV      1       /* [XSI] floating point divide by zero */
 301 #define FPE_FLTOVF      2       /* [XSI] floating point overflow */
 302 #define FPE_FLTUND      3       /* [XSI] floating point underflow */
 303 #define FPE_FLTRES      4       /* [XSI] floating point inexact result */
 304 #define FPE_FLTINV      5       /* [XSI] invalid floating point operation */
 305 #define FPE_FLTSUB      6       /* [XSI] subscript out of range -NOTIMP */
 306 #define FPE_INTDIV      7       /* [XSI] integer divide by zero -NOTIMP */
 307 #define FPE_INTOVF      8       /* [XSI] integer overflow -NOTIMP */
 308
 309 /* Codes for SIGSEGV */
 310 #ifndef _POSIX_C_SOURCE
 311 #define SEGV_NOOP       0       /* if only I knew... */
 312 #endif
 313 #define SEGV_MAPERR     1       /* [XSI] address not mapped to object */
 314 #define SEGV_ACCERR     2       /* [XSI] invalid permission for mapped object */
 315
 316 /* Codes for SIGBUS */
 317 #ifndef _POSIX_C_SOURCE
 318 #define BUS_NOOP        0       /* if only I knew... */
 319 #endif
 320 #define BUS_ADRALN      1       /* [XSI] Invalid address alignment */
 321 #define BUS_ADRERR      2       /* [XSI] Nonexistent physical address -NOTIMP */
 322 #define BUS_OBJERR      3       /* [XSI] Object-specific HW error - NOTIMP */
 323
 324 /* Codes for SIGTRAP */
 325 #define TRAP_BRKPT      1       /* [XSI] Process breakpoint -NOTIMP */
 326 #define TRAP_TRACE      2       /* [XSI] Process trace trap -NOTIMP */
 327
 328 /* Codes for SIGCHLD */
 329 #ifndef _POSIX_C_SOURCE
 330 #define CLD_NOOP        0       /* if only I knew... */
 331 #endif
 332 #define CLD_EXITED      1       /* [XSI] child has exited */
 333 #define CLD_KILLED      2       /* [XSI] terminated abnormally, no core file */
 334 #define CLD_DUMPED      3       /* [XSI] terminated abnormally, core file */
 335 #define CLD_TRAPPED     4       /* [XSI] traced child has trapped */
 336 #define CLD_STOPPED     5       /* [XSI] child has stopped */
 337 #define CLD_CONTINUED   6       /* [XSI] stopped child has continued */
 338
 339 /* Codes for SIGPOLL */
 340 #define POLL_IN         1       /* [XSR] Data input available */
 341 #define POLL_OUT        2       /* [XSR] Output buffers available */
 342 #define POLL_MSG        3       /* [XSR] Input message available */
 343 #define POLL_ERR        4       /* [XSR] I/O error */
 344 #define POLL_PRI        5       /* [XSR] High priority input available */
 345 #define POLL_HUP        6       /* [XSR] Device disconnected */
 346
 347 /* union for signal handlers */
 348 union __sigaction_u {
 349         void    (*__sa_handler)(int);
 350         void    (*__sa_sigaction)(int, struct __siginfo *,
 351                        void *);
 352 };
 353
 354 /* Signal vector template for Kernel user boundary */
 355 struct  __sigaction {
 356         union __sigaction_u __sigaction_u;  /* signal handler */
 357         void    (*sa_tramp)(void *, int, int, siginfo_t *, void *);
 358         sigset_t sa_mask;               /* signal mask to apply */
 359         int     sa_flags;               /* see signal options below */
 360 };
 361
 362 /*
 363  * Signal vector "template" used in sigaction call.
 364  */
 365 struct  sigaction {
 366         union __sigaction_u __sigaction_u;  /* signal handler */
 367         sigset_t sa_mask;               /* signal mask to apply */
 368         int     sa_flags;               /* see signal options below */
 369 };
 370
 371 #ifdef  BSD_KERNEL_PRIVATE
 372 #include <machine/types.h>
 373
 374 #if __DARWIN_ALIGN_NATURAL
 375 #pragma options align=natural
 376 #endif
 377
 378 union __user_sigaction_u {
 379         user_addr_t     __sa_handler;
 380         user_addr_t     __sa_sigaction;
 381 };
 382
 383 struct  user_sigaction {
 384         union __user_sigaction_u __sigaction_u;  /* signal handler */
 385         sigset_t sa_mask;               /* signal mask to apply */
 386         int     sa_flags;               /* see signal options below */
 387 };
 388
 389 struct  __user_sigaction {
 390         union __user_sigaction_u __sigaction_u;  /* signal handler */
 391         user_addr_t     sa_tramp;       /* signal mask to apply */
 392         sigset_t sa_mask;               /* signal mask to apply */
 393         int     sa_flags;               /* see signal options below */
 394 };
 395
 396 #if __DARWIN_ALIGN_NATURAL
 397 #pragma options align=reset
 398 #endif
 399
 400 #undef SIG_DFL
 401 #undef SIG_IGN
 402 #undef SIG_ERR
 403 #define  SIG_DFL        ((user_addr_t)0LL)
 404 #define  SIG_IGN        ((user_addr_t)1LL)
 405 #define  SIG_ERR        ((user_addr_t)-1LL)
 406
 407 #endif  /* BSD_KERNEL_PRIVATE */
 408
 409
 410 /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
 411 #define sa_handler      __sigaction_u.__sa_handler
 412 #define sa_sigaction    __sigaction_u.__sa_sigaction
 413
 414 #define SA_ONSTACK      0x0001  /* take signal on signal stack */
 415 #define SA_RESTART      0x0002  /* restart system on signal return */
 416 #define SA_DISABLE      0x0004  /* disable taking signals on alternate stack */
 417 #define SA_RESETHAND    0x0004  /* reset to SIG_DFL when taking signal */
 418 #define SA_NOCLDSTOP    0x0008  /* do not generate SIGCHLD on child stop */
 419 #define SA_NODEFER      0x0010  /* don't mask the signal we're delivering */
 420 #define SA_NOCLDWAIT    0x0020  /* don't keep zombies around */
 421 #define SA_SIGINFO      0x0040  /* signal handler with SA_SIGINFO args */
 422 #ifndef _POSIX_C_SOURCE
 423 #define SA_USERTRAMP    0x0100  /* do not bounce off kernel's sigtramp */
 424 /* This will provide 64bit register set in a 32bit user address space */
 425 #define SA_64REGSET     0x0200  /* signal handler with SA_SIGINFO args with 64bit regs information */
 426 #endif /* !_POSIX_C_SOURCE */
 427
 428 /*
 429  * Flags for sigprocmask:
 430  */
 431 #define SIG_BLOCK       1       /* block specified signal set */
 432 #define SIG_UNBLOCK     2       /* unblock specified signal set */
 433 #define SIG_SETMASK     3       /* set specified signal set */
 434
 435 /* POSIX 1003.1b required values. */
 436 #define SI_USER         0x10001 /* [CX] signal from kill() */
 437 #define SI_QUEUE        0x10002 /* [CX] signal from sigqueue() */
 438 #define SI_TIMER        0x10003 /* [CX] timer expiration */
 439 #define SI_ASYNCIO      0x10004 /* [CX] aio request completion */
 440 #define SI_MESGQ        0x10005 /* [CX] from message arrival on empty queue */
 441
 442 #ifndef _POSIX_C_SOURCE
 443 typedef void (*sig_t)(int);     /* type of signal function */
 444 #endif
 445
 446 /*
 447  * Structure used in sigaltstack call.
 448  */
 449 #ifdef  BSD_KERNEL_PRIVATE
 450
 451 #if __DARWIN_ALIGN_NATURAL
 452 #pragma options align=natural
 453 #endif
 454
 455 struct  user_sigaltstack {
 456         user_addr_t     ss_sp;          /* signal stack base */
 457         user_size_t     ss_size;        /* signal stack length */
 458         int             ss_flags;       /* SA_DISABLE and/or SA_ONSTACK */
 459 };
 460
 461 #if __DARWIN_ALIGN_NATURAL
 462 #pragma options align=reset
 463 #endif
 464
 465 #endif  /* BSD_KERNEL_PRIVATE */
 466
 467 #ifndef _STACK_T
 468 #define _STACK_T
 469 typedef __darwin_stack_t stack_t;
 470 #endif
 471
 472 #define SS_ONSTACK      0x0001  /* take signal on signal stack */
 473 #define SS_DISABLE      0x0004  /* disable taking signals on alternate stack */
 474 #define MINSIGSTKSZ     32768   /* (32K)minimum allowable stack */
 475 #define SIGSTKSZ        131072  /* (128K)recommended stack size */
 476
 477 #ifndef _POSIX_C_SOURCE
 478 /*
 479  * 4.3 compatibility:
 480  * Signal vector "template" used in sigvec call.
 481  */
 482 struct  sigvec {
 483         void    (*sv_handler)(int);     /* signal handler */
 484         int     sv_mask;                /* signal mask to apply */
 485         int     sv_flags;               /* see signal options below */
 486 };
 487
 488 #define SV_ONSTACK      SA_ONSTACK
 489 #define SV_INTERRUPT    SA_RESTART      /* same bit, opposite sense */
 490 #define SV_RESETHAND    SA_RESETHAND
 491 #define SV_NODEFER      SA_NODEFER
 492 #define SV_NOCLDSTOP    SA_NOCLDSTOP
 493 #define SV_SIGINFO      SA_SIGINFO
 494
 495 #define sv_onstack sv_flags     /* isn't compatibility wonderful! */
 496 #endif /* !_POSIX_C_SOURCE */
 497
 498 /*
 499  * Structure used in sigstack call.
 500  */
 501 struct  sigstack {
 502         char    *ss_sp;                 /* signal stack pointer */
 503         int     ss_onstack;             /* current status */
 504 };
 505
 506 #ifndef _POSIX_C_SOURCE
 507 /*
 508  * Macro for converting signal number to a mask suitable for
 509  * sigblock().
 510  */
 511 #define sigmask(m)      (1 << ((m)-1))
 512
 513 #ifdef  BSD_KERNEL_PRIVATE
 514 /*
 515  *      signals delivered on a per-thread basis.
 516  */
 517 #define threadmask (sigmask(SIGILL)|sigmask(SIGTRAP)|\
 518                     sigmask(SIGIOT)|sigmask(SIGEMT)|\
 519                     sigmask(SIGFPE)|sigmask(SIGBUS)|\
 520                     sigmask(SIGSEGV)|sigmask(SIGSYS)|\
 521                     sigmask(SIGPIPE))
 522 #endif  /* BSD_KERNEL_PRIVATE */
 523
 524 #define BADSIG          SIG_ERR
 525
 526 #endif  /* !_POSIX_C_SOURCE */
 527 #endif  /* !_ANSI_SOURCE */
 528
 529 /*
 530  * For historical reasons; programs expect signal's return value to be
 531  * defined by <sys/signal.h>.
 532  */
 533 __BEGIN_DECLS
 534 void    (*signal(int, void (*)(int)))(int);
 535 __END_DECLS
 536 #endif  /* !_SYS_SIGNAL_H_ */