bsd/sys/signal.h

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  24 /*
  25  * Copyright (c) 1982, 1986, 1989, 1991, 1993
  26  *      The Regents of the University of California.  All rights reserved.
  27  * (c) UNIX System Laboratories, Inc.
  28  * All or some portions of this file are derived from material licensed
  29  * to the University of California by American Telephone and Telegraph
  30  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  31  * the permission of UNIX System Laboratories, Inc.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)signal.h    8.2 (Berkeley) 1/21/94
  62  */
  63
  64 #ifndef _SYS_SIGNAL_H_
  65 #define _SYS_SIGNAL_H_
  66
  67 #include <sys/cdefs.h>
  68 #include <sys/appleapiopts.h>
  69
  70 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
  71 #define NSIG    32              /* counting 0; could be 33 (mask is 1-32) */
  72 #endif
  73
  74 #include <machine/signal.h>     /* sigcontext; codes for SIGILL, SIGFPE */
  75
  76 #define SIGHUP  1       /* hangup */
  77 #define SIGINT  2       /* interrupt */
  78 #define SIGQUIT 3       /* quit */
  79 #define SIGILL  4       /* illegal instruction (not reset when caught) */
  80 #define SIGTRAP 5       /* trace trap (not reset when caught) */
  81 #define SIGABRT 6       /* abort() */
  82 #if  defined(_POSIX_C_SOURCE)
  83 #define SIGPOLL 7       /* pollable event ([XSR] generated, not supported) */
  84 #else   /* !_POSIX_C_SOURCE */
  85 #define SIGIOT  SIGABRT /* compatibility */
  86 #define SIGEMT  7       /* EMT instruction */
  87 #endif  /* !_POSIX_C_SOURCE */
  88 #define SIGFPE  8       /* floating point exception */
  89 #define SIGKILL 9       /* kill (cannot be caught or ignored) */
  90 #define SIGBUS  10      /* bus error */
  91 #define SIGSEGV 11      /* segmentation violation */
  92 #define SIGSYS  12      /* bad argument to system call */
  93 #define SIGPIPE 13      /* write on a pipe with no one to read it */
  94 #define SIGALRM 14      /* alarm clock */
  95 #define SIGTERM 15      /* software termination signal from kill */
  96 #define SIGURG  16      /* urgent condition on IO channel */
  97 #define SIGSTOP 17      /* sendable stop signal not from tty */
  98 #define SIGTSTP 18      /* stop signal from tty */
  99 #define SIGCONT 19      /* continue a stopped process */
 100 #define SIGCHLD 20      /* to parent on child stop or exit */
 101 #define SIGTTIN 21      /* to readers pgrp upon background tty read */
 102 #define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
 103 #if  !defined(_POSIX_C_SOURCE)
 104 #define SIGIO   23      /* input/output possible signal */
 105 #endif
 106 #define SIGXCPU 24      /* exceeded CPU time limit */
 107 #define SIGXFSZ 25      /* exceeded file size limit */
 108 #define SIGVTALRM 26    /* virtual time alarm */
 109 #define SIGPROF 27      /* profiling time alarm */
 110 #if  !defined(_POSIX_C_SOURCE)
 111 #define SIGWINCH 28     /* window size changes */
 112 #define SIGINFO 29      /* information request */
 113 #endif
 114 #define SIGUSR1 30      /* user defined signal 1 */
 115 #define SIGUSR2 31      /* user defined signal 2 */
 116
 117 #if defined(_ANSI_SOURCE) || defined(_POSIX_C_SOURCE) || defined(__cplusplus)
 118 /*
 119  * Language spec sez we must list exactly one parameter, even though we
 120  * actually supply three.  Ugh!
 121  * SIG_HOLD is chosen to avoid KERN_SIG_* values in <sys/signalvar.h>
 122  */
 123 #define SIG_DFL         (void (*)(int))0
 124 #define SIG_IGN         (void (*)(int))1
 125 #define SIG_HOLD        (void (*)(int))5
 126 #define SIG_ERR         ((void (*)(int))-1)
 127 #else
 128 /* DO NOT REMOVE THE COMMENTED OUT int: fixincludes needs to see them */
 129 #define SIG_DFL         (void (*)(/*int*/))0
 130 #define SIG_IGN         (void (*)(/*int*/))1
 131 #define SIG_HOLD        (void (*)(/*int*/))5
 132 #define SIG_ERR         ((void (*)(/*int*/))-1)
 133 #endif
 134
 135 #ifndef _ANSI_SOURCE
 136 #include <sys/_types.h>
 137
 138 #ifndef _MCONTEXT_T
 139 #define _MCONTEXT_T
 140 typedef __darwin_mcontext_t             mcontext_t;
 141 #endif
 142
 143 #ifndef _POSIX_C_SOURCE
 144 #ifndef _MCONTEXT64_T
 145 #define _MCONTEXT64_T
 146 typedef __darwin_mcontext64_t           mcontext64_t;
 147 #endif
 148 #endif /* _POSIX_C_SOURCE */
 149
 150 #ifndef _PID_T
 151 #define _PID_T
 152 typedef __darwin_pid_t                  pid_t;
 153 #endif
 154
 155 #ifndef _PTHREAD_ATTR_T
 156 #define _PTHREAD_ATTR_T
 157 typedef __darwin_pthread_attr_t         pthread_attr_t;
 158 #endif
 159
 160 #ifndef _SIGSET_T
 161 #define _SIGSET_T
 162 typedef __darwin_sigset_t               sigset_t;
 163 #endif
 164
 165 #ifndef _SIZE_T
 166 #define _SIZE_T
 167 typedef __darwin_size_t                 size_t;
 168 #endif
 169
 170 #ifndef _UCONTEXT_T
 171 #define _UCONTEXT_T
 172 typedef __darwin_ucontext_t             ucontext_t;
 173 #endif
 174
 175 #ifndef _POSIX_C_SOURCE
 176 #ifndef _UCONTEXT64_T
 177 #define _UCONTEXT64_T
 178 typedef __darwin_ucontext64_t           ucontext64_t;
 179 #endif
 180 #endif /* _POSIX_C_SOURCE */
 181
 182 #ifndef _UID_T
 183 #define _UID_T
 184 typedef __darwin_uid_t                  uid_t;
 185 #endif
 186
 187 union sigval {
 188         /* Members as suggested by Annex C of POSIX 1003.1b. */
 189         int     sival_int;
 190         void    *sival_ptr;
 191 };
 192
 193 #define SIGEV_NONE      0               /* No async notification */
 194 #define SIGEV_SIGNAL    1               /* aio - completion notification */
 195 #define SIGEV_THREAD    3               /* A notification function will be called to perform notification */
 196
 197 struct sigevent {
 198         int                             sigev_notify;                           /* Notification type */
 199         int                             sigev_signo;                            /* Signal number */
 200         union sigval    sigev_value;                            /* Signal value */
 201         void                    (*sigev_notify_function)(union sigval);   /* Notification function */
 202         pthread_attr_t  *sigev_notify_attributes;       /* Notification attributes */
 203 };
 204
 205 // LP64todo - should this move?
 206 #ifdef BSD_KERNEL_PRIVATE
 207
 208 #if __DARWIN_ALIGN_NATURAL
 209 #pragma options align=natural
 210 #endif
 211
 212 union user_sigval {
 213         struct {
 214                 int             pad;    /* assumes Motorolla byte order */
 215                 int             sival_int;
 216         } size_equivalent;
 217         user_addr_t     sival_ptr;
 218 };
 219
 220 struct user_sigevent {
 221         int             sigev_notify;                   /* Notification type */
 222         int             sigev_signo;                    /* Signal number */
 223         union user_sigval sigev_value;                  /* Signal value */
 224         user_addr_t     sigev_notify_function;          /* Notify function */
 225         user_addr_t     sigev_notify_attributes;        /* Notify attributes */
 226 };
 227
 228 #if __DARWIN_ALIGN_NATURAL
 229 #pragma options align=reset
 230 #endif
 231
 232 #endif  /* BSD_KERNEL_PRIVATE */
 233
 234 typedef struct __siginfo {
 235         int     si_signo;               /* signal number */
 236         int     si_errno;               /* errno association */
 237         int     si_code;                /* signal code */
 238         pid_t   si_pid;                 /* sending process */
 239         uid_t   si_uid;                 /* sender's ruid */
 240         int     si_status;              /* exit value */
 241         void    *si_addr;               /* faulting instruction */
 242         union sigval si_value;          /* signal value */
 243         long    si_band;                /* band event for SIGPOLL */
 244         unsigned long   pad[7];         /* Reserved for Future Use */
 245 } siginfo_t;
 246
 247 #ifdef BSD_KERNEL_PRIVATE
 248
 249 #if __DARWIN_ALIGN_NATURAL
 250 #pragma options align=natural
 251 #endif
 252
 253 typedef struct __user_siginfo {
 254         int             si_signo;       /* signal number */
 255         int             si_errno;       /* errno association */
 256         int             si_code;        /* signal code */
 257         pid_t           si_pid;         /* sending process */
 258         uid_t           si_uid;         /* sender's ruid */
 259         int             si_status;      /* exit value */
 260         user_addr_t     si_addr;        /* faulting instruction */
 261         union user_sigval si_value;     /* signal value */
 262         user_long_t     si_band;        /* band event for SIGPOLL */
 263         user_ulong_t    pad[7];         /* Reserved for Future Use */
 264 } user_siginfo_t;
 265
 266 #if __DARWIN_ALIGN_NATURAL
 267 #pragma options align=reset
 268 #endif
 269
 270 #endif  /* BSD_KERNEL_PRIVATE */
 271
 272 /*
 273  * Incase of SIGILL and SIGFPE, si_addr contains the address of
 274  *  faulting instruction.
 275  * Incase of SIGSEGV and SIGBUS, si_addr contains address of
 276  *  faulting memory reference.
 277  * Incase of SIGCHLD, si_pid willhave child process ID,
 278  *  si_status will contain exit value or signal.
 279  *  si_uid contains real user ID of the process that sent the signal
 280  */
 281
 282 /* Values for si_code */
 283
 284 /* Codes for SIGILL */
 285 #ifndef _POSIX_C_SOURCE
 286 #define ILL_NOOP        0       /* if only I knew... */
 287 #endif
 288 #define ILL_ILLOPC      1       /* [XSI] illegal opcode */
 289 #define ILL_ILLTRP      2       /* [XSI] illegal trap */
 290 #define ILL_PRVOPC      3       /* [XSI] privileged opcode */
 291 #define ILL_ILLOPN      4       /* [XSI] illegal operand -NOTIMP */
 292 #define ILL_ILLADR      5       /* [XSI] illegal addressing mode -NOTIMP */
 293 #define ILL_PRVREG      6       /* [XSI] privileged register -NOTIMP */
 294 #define ILL_COPROC      7       /* [XSI] coprocessor error -NOTIMP */
 295 #define ILL_BADSTK      8       /* [XSI] internal stack error -NOTIMP */
 296
 297 /* Codes for SIGFPE */
 298 #ifndef _POSIX_C_SOURCE
 299 #define FPE_NOOP        0       /* if only I knew... */
 300 #endif
 301 #define FPE_FLTDIV      1       /* [XSI] floating point divide by zero */
 302 #define FPE_FLTOVF      2       /* [XSI] floating point overflow */
 303 #define FPE_FLTUND      3       /* [XSI] floating point underflow */
 304 #define FPE_FLTRES      4       /* [XSI] floating point inexact result */
 305 #define FPE_FLTINV      5       /* [XSI] invalid floating point operation */
 306 #define FPE_FLTSUB      6       /* [XSI] subscript out of range -NOTIMP */
 307 #define FPE_INTDIV      7       /* [XSI] integer divide by zero -NOTIMP */
 308 #define FPE_INTOVF      8       /* [XSI] integer overflow -NOTIMP */
 309
 310 /* Codes for SIGSEGV */
 311 #ifndef _POSIX_C_SOURCE
 312 #define SEGV_NOOP       0       /* if only I knew... */
 313 #endif
 314 #define SEGV_MAPERR     1       /* [XSI] address not mapped to object */
 315 #define SEGV_ACCERR     2       /* [XSI] invalid permission for mapped object */
 316
 317 /* Codes for SIGBUS */
 318 #ifndef _POSIX_C_SOURCE
 319 #define BUS_NOOP        0       /* if only I knew... */
 320 #endif
 321 #define BUS_ADRALN      1       /* [XSI] Invalid address alignment */
 322 #define BUS_ADRERR      2       /* [XSI] Nonexistent physical address -NOTIMP */
 323 #define BUS_OBJERR      3       /* [XSI] Object-specific HW error - NOTIMP */
 324
 325 /* Codes for SIGTRAP */
 326 #define TRAP_BRKPT      1       /* [XSI] Process breakpoint -NOTIMP */
 327 #define TRAP_TRACE      2       /* [XSI] Process trace trap -NOTIMP */
 328
 329 /* Codes for SIGCHLD */
 330 #ifndef _POSIX_C_SOURCE
 331 #define CLD_NOOP        0       /* if only I knew... */
 332 #endif
 333 #define CLD_EXITED      1       /* [XSI] child has exited */
 334 #define CLD_KILLED      2       /* [XSI] terminated abnormally, no core file */
 335 #define CLD_DUMPED      3       /* [XSI] terminated abnormally, core file */
 336 #define CLD_TRAPPED     4       /* [XSI] traced child has trapped */
 337 #define CLD_STOPPED     5       /* [XSI] child has stopped */
 338 #define CLD_CONTINUED   6       /* [XSI] stopped child has continued */
 339
 340 /* Codes for SIGPOLL */
 341 #define POLL_IN         1       /* [XSR] Data input available */
 342 #define POLL_OUT        2       /* [XSR] Output buffers available */
 343 #define POLL_MSG        3       /* [XSR] Input message available */
 344 #define POLL_ERR        4       /* [XSR] I/O error */
 345 #define POLL_PRI        5       /* [XSR] High priority input available */
 346 #define POLL_HUP        6       /* [XSR] Device disconnected */
 347
 348 /* union for signal handlers */
 349 union __sigaction_u {
 350         void    (*__sa_handler)(int);
 351         void    (*__sa_sigaction)(int, struct __siginfo *,
 352                        void *);
 353 };
 354
 355 /* Signal vector template for Kernel user boundary */
 356 struct  __sigaction {
 357         union __sigaction_u __sigaction_u;  /* signal handler */
 358         void    (*sa_tramp)(void *, int, int, siginfo_t *, void *);
 359         sigset_t sa_mask;               /* signal mask to apply */
 360         int     sa_flags;               /* see signal options below */
 361 };
 362
 363 /*
 364  * Signal vector "template" used in sigaction call.
 365  */
 366 struct  sigaction {
 367         union __sigaction_u __sigaction_u;  /* signal handler */
 368         sigset_t sa_mask;               /* signal mask to apply */
 369         int     sa_flags;               /* see signal options below */
 370 };
 371
 372 #ifdef  BSD_KERNEL_PRIVATE
 373 #include <machine/types.h>
 374
 375 #if __DARWIN_ALIGN_NATURAL
 376 #pragma options align=natural
 377 #endif
 378
 379 union __user_sigaction_u {
 380         user_addr_t     __sa_handler;
 381         user_addr_t     __sa_sigaction;
 382 };
 383
 384 struct  user_sigaction {
 385         union __user_sigaction_u __sigaction_u;  /* signal handler */
 386         sigset_t sa_mask;               /* signal mask to apply */
 387         int     sa_flags;               /* see signal options below */
 388 };
 389
 390 struct  __user_sigaction {
 391         union __user_sigaction_u __sigaction_u;  /* signal handler */
 392         user_addr_t     sa_tramp;       /* signal mask to apply */
 393         sigset_t sa_mask;               /* signal mask to apply */
 394         int     sa_flags;               /* see signal options below */
 395 };
 396
 397 #if __DARWIN_ALIGN_NATURAL
 398 #pragma options align=reset
 399 #endif
 400
 401 #undef SIG_DFL
 402 #undef SIG_IGN
 403 #undef SIG_ERR
 404 #define  SIG_DFL        ((user_addr_t)0LL)
 405 #define  SIG_IGN        ((user_addr_t)1LL)
 406 #define  SIG_ERR        ((user_addr_t)-1LL)
 407
 408 #endif  /* BSD_KERNEL_PRIVATE */
 409
 410
 411 /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
 412 #define sa_handler      __sigaction_u.__sa_handler
 413 #define sa_sigaction    __sigaction_u.__sa_sigaction
 414
 415 #define SA_ONSTACK      0x0001  /* take signal on signal stack */
 416 #define SA_RESTART      0x0002  /* restart system on signal return */
 417 #define SA_DISABLE      0x0004  /* disable taking signals on alternate stack */
 418 #define SA_RESETHAND    0x0004  /* reset to SIG_DFL when taking signal */
 419 #define SA_NOCLDSTOP    0x0008  /* do not generate SIGCHLD on child stop */
 420 #define SA_NODEFER      0x0010  /* don't mask the signal we're delivering */
 421 #define SA_NOCLDWAIT    0x0020  /* don't keep zombies around */
 422 #define SA_SIGINFO      0x0040  /* signal handler with SA_SIGINFO args */
 423 #ifndef _POSIX_C_SOURCE
 424 #define SA_USERTRAMP    0x0100  /* do not bounce off kernel's sigtramp */
 425 /* This will provide 64bit register set in a 32bit user address space */
 426 #define SA_64REGSET     0x0200  /* signal handler with SA_SIGINFO args with 64bit regs information */
 427 #endif /* !_POSIX_C_SOURCE */
 428
 429 /*
 430  * Flags for sigprocmask:
 431  */
 432 #define SIG_BLOCK       1       /* block specified signal set */
 433 #define SIG_UNBLOCK     2       /* unblock specified signal set */
 434 #define SIG_SETMASK     3       /* set specified signal set */
 435
 436 /* POSIX 1003.1b required values. */
 437 #define SI_USER         0x10001 /* [CX] signal from kill() */
 438 #define SI_QUEUE        0x10002 /* [CX] signal from sigqueue() */
 439 #define SI_TIMER        0x10003 /* [CX] timer expiration */
 440 #define SI_ASYNCIO      0x10004 /* [CX] aio request completion */
 441 #define SI_MESGQ        0x10005 /* [CX] from message arrival on empty queue */
 442
 443 #ifndef _POSIX_C_SOURCE
 444 typedef void (*sig_t)(int);     /* type of signal function */
 445 #endif
 446
 447 /*
 448  * Structure used in sigaltstack call.
 449  */
 450 #ifdef  BSD_KERNEL_PRIVATE
 451
 452 #if __DARWIN_ALIGN_NATURAL
 453 #pragma options align=natural
 454 #endif
 455
 456 struct  user_sigaltstack {
 457         user_addr_t     ss_sp;          /* signal stack base */
 458         user_size_t     ss_size;        /* signal stack length */
 459         int             ss_flags;       /* SA_DISABLE and/or SA_ONSTACK */
 460 };
 461
 462 #if __DARWIN_ALIGN_NATURAL
 463 #pragma options align=reset
 464 #endif
 465
 466 #endif  /* BSD_KERNEL_PRIVATE */
 467
 468 #ifndef _STACK_T
 469 #define _STACK_T
 470 typedef __darwin_stack_t stack_t;
 471 #endif
 472
 473 #define SS_ONSTACK      0x0001  /* take signal on signal stack */
 474 #define SS_DISABLE      0x0004  /* disable taking signals on alternate stack */
 475 #define MINSIGSTKSZ     32768   /* (32K)minimum allowable stack */
 476 #define SIGSTKSZ        131072  /* (128K)recommended stack size */
 477
 478 #ifndef _POSIX_C_SOURCE
 479 /*
 480  * 4.3 compatibility:
 481  * Signal vector "template" used in sigvec call.
 482  */
 483 struct  sigvec {
 484         void    (*sv_handler)(int);     /* signal handler */
 485         int     sv_mask;                /* signal mask to apply */
 486         int     sv_flags;               /* see signal options below */
 487 };
 488
 489 #define SV_ONSTACK      SA_ONSTACK
 490 #define SV_INTERRUPT    SA_RESTART      /* same bit, opposite sense */
 491 #define SV_RESETHAND    SA_RESETHAND
 492 #define SV_NODEFER      SA_NODEFER
 493 #define SV_NOCLDSTOP    SA_NOCLDSTOP
 494 #define SV_SIGINFO      SA_SIGINFO
 495
 496 #define sv_onstack sv_flags     /* isn't compatibility wonderful! */
 497 #endif /* !_POSIX_C_SOURCE */
 498
 499 /*
 500  * Structure used in sigstack call.
 501  */
 502 struct  sigstack {
 503         char    *ss_sp;                 /* signal stack pointer */
 504         int     ss_onstack;             /* current status */
 505 };
 506
 507 #ifndef _POSIX_C_SOURCE
 508 /*
 509  * Macro for converting signal number to a mask suitable for
 510  * sigblock().
 511  */
 512 #define sigmask(m)      (1 << ((m)-1))
 513
 514 #ifdef  BSD_KERNEL_PRIVATE
 515 /*
 516  *      signals delivered on a per-thread basis.
 517  */
 518 #define threadmask (sigmask(SIGILL)|sigmask(SIGTRAP)|\
 519                     sigmask(SIGIOT)|sigmask(SIGEMT)|\
 520                     sigmask(SIGFPE)|sigmask(SIGBUS)|\
 521                     sigmask(SIGSEGV)|sigmask(SIGSYS)|\
 522                     sigmask(SIGPIPE))
 523 #endif  /* BSD_KERNEL_PRIVATE */
 524
 525 #define BADSIG          SIG_ERR
 526
 527 #endif  /* !_POSIX_C_SOURCE */
 528 #endif  /* !_ANSI_SOURCE */
 529
 530 /*
 531  * For historical reasons; programs expect signal's return value to be
 532  * defined by <sys/signal.h>.
 533  */
 534 __BEGIN_DECLS
 535 void    (*signal(int, void (*)(int)))(int);
 536 __END_DECLS
 537 #endif  /* !_SYS_SIGNAL_H_ */