bsd/sys/signal.h

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  31 /*
  32  * Copyright (c) 1982, 1986, 1989, 1991, 1993
  33  *      The Regents of the University of California.  All rights reserved.
  34  * (c) UNIX System Laboratories, Inc.
  35  * All or some portions of this file are derived from material licensed
  36  * to the University of California by American Telephone and Telegraph
  37  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  38  * the permission of UNIX System Laboratories, Inc.
  39  *
  40  * Redistribution and use in source and binary forms, with or without
  41  * modification, are permitted provided that the following conditions
  42  * are met:
  43  * 1. Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  * 2. Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in the
  47  *    documentation and/or other materials provided with the distribution.
  48  * 3. All advertising materials mentioning features or use of this software
  49  *    must display the following acknowledgement:
  50  *      This product includes software developed by the University of
  51  *      California, Berkeley and its contributors.
  52  * 4. Neither the name of the University nor the names of its contributors
  53  *    may be used to endorse or promote products derived from this software
  54  *    without specific prior written permission.
  55  *
  56  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  57  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  58  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  59  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  60  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  61  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  62  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  63  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  64  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  65  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  66  * SUCH DAMAGE.
  67  *
  68  *      @(#)signal.h    8.2 (Berkeley) 1/21/94
  69  */
  70
  71 #ifndef _SYS_SIGNAL_H_
  72 #define _SYS_SIGNAL_H_
  73
  74 #include <sys/cdefs.h>
  75 #include <sys/appleapiopts.h>
  76
  77 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_C_SOURCE)
  78 #define NSIG    32              /* counting 0; could be 33 (mask is 1-32) */
  79 #endif
  80
  81 #include <machine/signal.h>     /* sigcontext; codes for SIGILL, SIGFPE */
  82
  83 #define SIGHUP  1       /* hangup */
  84 #define SIGINT  2       /* interrupt */
  85 #define SIGQUIT 3       /* quit */
  86 #define SIGILL  4       /* illegal instruction (not reset when caught) */
  87 #define SIGTRAP 5       /* trace trap (not reset when caught) */
  88 #define SIGABRT 6       /* abort() */
  89 #if  defined(_POSIX_C_SOURCE)
  90 #define SIGPOLL 7       /* pollable event ([XSR] generated, not supported) */
  91 #else   /* !_POSIX_C_SOURCE */
  92 #define SIGIOT  SIGABRT /* compatibility */
  93 #define SIGEMT  7       /* EMT instruction */
  94 #endif  /* !_POSIX_C_SOURCE */
  95 #define SIGFPE  8       /* floating point exception */
  96 #define SIGKILL 9       /* kill (cannot be caught or ignored) */
  97 #define SIGBUS  10      /* bus error */
  98 #define SIGSEGV 11      /* segmentation violation */
  99 #define SIGSYS  12      /* bad argument to system call */
 100 #define SIGPIPE 13      /* write on a pipe with no one to read it */
 101 #define SIGALRM 14      /* alarm clock */
 102 #define SIGTERM 15      /* software termination signal from kill */
 103 #define SIGURG  16      /* urgent condition on IO channel */
 104 #define SIGSTOP 17      /* sendable stop signal not from tty */
 105 #define SIGTSTP 18      /* stop signal from tty */
 106 #define SIGCONT 19      /* continue a stopped process */
 107 #define SIGCHLD 20      /* to parent on child stop or exit */
 108 #define SIGTTIN 21      /* to readers pgrp upon background tty read */
 109 #define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
 110 #if  !defined(_POSIX_C_SOURCE)
 111 #define SIGIO   23      /* input/output possible signal */
 112 #endif
 113 #define SIGXCPU 24      /* exceeded CPU time limit */
 114 #define SIGXFSZ 25      /* exceeded file size limit */
 115 #define SIGVTALRM 26    /* virtual time alarm */
 116 #define SIGPROF 27      /* profiling time alarm */
 117 #if  !defined(_POSIX_C_SOURCE)
 118 #define SIGWINCH 28     /* window size changes */
 119 #define SIGINFO 29      /* information request */
 120 #endif
 121 #define SIGUSR1 30      /* user defined signal 1 */
 122 #define SIGUSR2 31      /* user defined signal 2 */
 123
 124 #if defined(_ANSI_SOURCE) || defined(_POSIX_C_SOURCE) || defined(__cplusplus)
 125 /*
 126  * Language spec sez we must list exactly one parameter, even though we
 127  * actually supply three.  Ugh!
 128  * SIG_HOLD is chosen to avoid KERN_SIG_* values in <sys/signalvar.h>
 129  */
 130 #define SIG_DFL         (void (*)(int))0
 131 #define SIG_IGN         (void (*)(int))1
 132 #define SIG_HOLD        (void (*)(int))5
 133 #define SIG_ERR         ((void (*)(int))-1)
 134 #else
 135 /* DO NOT REMOVE THE COMMENTED OUT int: fixincludes needs to see them */
 136 #define SIG_DFL         (void (*)(/*int*/))0
 137 #define SIG_IGN         (void (*)(/*int*/))1
 138 #define SIG_HOLD        (void (*)(/*int*/))5
 139 #define SIG_ERR         ((void (*)(/*int*/))-1)
 140 #endif
 141
 142 #ifndef _ANSI_SOURCE
 143 #include <sys/_types.h>
 144
 145 #ifndef _MCONTEXT_T
 146 #define _MCONTEXT_T
 147 typedef __darwin_mcontext_t             mcontext_t;
 148 #endif
 149
 150 #ifndef _POSIX_C_SOURCE
 151 #ifndef _MCONTEXT64_T
 152 #define _MCONTEXT64_T
 153 typedef __darwin_mcontext64_t           mcontext64_t;
 154 #endif
 155 #endif /* _POSIX_C_SOURCE */
 156
 157 #ifndef _PID_T
 158 #define _PID_T
 159 typedef __darwin_pid_t                  pid_t;
 160 #endif
 161
 162 #ifndef _PTHREAD_ATTR_T
 163 #define _PTHREAD_ATTR_T
 164 typedef __darwin_pthread_attr_t         pthread_attr_t;
 165 #endif
 166
 167 #ifndef _SIGSET_T
 168 #define _SIGSET_T
 169 typedef __darwin_sigset_t               sigset_t;
 170 #endif
 171
 172 #ifndef _SIZE_T
 173 #define _SIZE_T
 174 typedef __darwin_size_t                 size_t;
 175 #endif
 176
 177 #ifndef _UCONTEXT_T
 178 #define _UCONTEXT_T
 179 typedef __darwin_ucontext_t             ucontext_t;
 180 #endif
 181
 182 #ifndef _POSIX_C_SOURCE
 183 #ifndef _UCONTEXT64_T
 184 #define _UCONTEXT64_T
 185 typedef __darwin_ucontext64_t           ucontext64_t;
 186 #endif
 187 #endif /* _POSIX_C_SOURCE */
 188
 189 #ifndef _UID_T
 190 #define _UID_T
 191 typedef __darwin_uid_t                  uid_t;
 192 #endif
 193
 194 union sigval {
 195         /* Members as suggested by Annex C of POSIX 1003.1b. */
 196         int     sival_int;
 197         void    *sival_ptr;
 198 };
 199
 200 #define SIGEV_NONE      0               /* No async notification */
 201 #define SIGEV_SIGNAL    1               /* aio - completion notification */
 202 #define SIGEV_THREAD    3               /* A notification function will be called to perform notification */
 203
 204 struct sigevent {
 205         int                             sigev_notify;                           /* Notification type */
 206         int                             sigev_signo;                            /* Signal number */
 207         union sigval    sigev_value;                            /* Signal value */
 208         void                    (*sigev_notify_function)(union sigval);   /* Notification function */
 209         pthread_attr_t  *sigev_notify_attributes;       /* Notification attributes */
 210 };
 211
 212 // LP64todo - should this move?
 213 #ifdef BSD_KERNEL_PRIVATE
 214
 215 #if __DARWIN_ALIGN_NATURAL
 216 #pragma options align=natural
 217 #endif
 218
 219 union user_sigval {
 220         struct {
 221                 int             pad;    /* assumes Motorolla byte order */
 222                 int             sival_int;
 223         } size_equivalent;
 224         user_addr_t     sival_ptr;
 225 };
 226
 227 struct user_sigevent {
 228         int             sigev_notify;                   /* Notification type */
 229         int             sigev_signo;                    /* Signal number */
 230         union user_sigval sigev_value;                  /* Signal value */
 231         user_addr_t     sigev_notify_function;          /* Notify function */
 232         user_addr_t     sigev_notify_attributes;        /* Notify attributes */
 233 };
 234
 235 #if __DARWIN_ALIGN_NATURAL
 236 #pragma options align=reset
 237 #endif
 238
 239 #endif  /* BSD_KERNEL_PRIVATE */
 240
 241 typedef struct __siginfo {
 242         int     si_signo;               /* signal number */
 243         int     si_errno;               /* errno association */
 244         int     si_code;                /* signal code */
 245         pid_t   si_pid;                 /* sending process */
 246         uid_t   si_uid;                 /* sender's ruid */
 247         int     si_status;              /* exit value */
 248         void    *si_addr;               /* faulting instruction */
 249         union sigval si_value;          /* signal value */
 250         long    si_band;                /* band event for SIGPOLL */
 251         unsigned long   pad[7];         /* Reserved for Future Use */
 252 } siginfo_t;
 253
 254 #ifdef BSD_KERNEL_PRIVATE
 255
 256 #if __DARWIN_ALIGN_NATURAL
 257 #pragma options align=natural
 258 #endif
 259
 260 typedef struct __user_siginfo {
 261         int             si_signo;       /* signal number */
 262         int             si_errno;       /* errno association */
 263         int             si_code;        /* signal code */
 264         pid_t           si_pid;         /* sending process */
 265         uid_t           si_uid;         /* sender's ruid */
 266         int             si_status;      /* exit value */
 267         user_addr_t     si_addr;        /* faulting instruction */
 268         union user_sigval si_value;     /* signal value */
 269         user_long_t     si_band;        /* band event for SIGPOLL */
 270         user_ulong_t    pad[7];         /* Reserved for Future Use */
 271 } user_siginfo_t;
 272
 273 #if __DARWIN_ALIGN_NATURAL
 274 #pragma options align=reset
 275 #endif
 276
 277 #endif  /* BSD_KERNEL_PRIVATE */
 278
 279 /*
 280  * Incase of SIGILL and SIGFPE, si_addr contains the address of
 281  *  faulting instruction.
 282  * Incase of SIGSEGV and SIGBUS, si_addr contains address of
 283  *  faulting memory reference.
 284  * Incase of SIGCHLD, si_pid willhave child process ID,
 285  *  si_status will contain exit value or signal.
 286  *  si_uid contains real user ID of the process that sent the signal
 287  */
 288
 289 /* Values for si_code */
 290
 291 /* Codes for SIGILL */
 292 #ifndef _POSIX_C_SOURCE
 293 #define ILL_NOOP        0       /* if only I knew... */
 294 #endif
 295 #define ILL_ILLOPC      1       /* [XSI] illegal opcode */
 296 #define ILL_ILLTRP      2       /* [XSI] illegal trap */
 297 #define ILL_PRVOPC      3       /* [XSI] privileged opcode */
 298 #define ILL_ILLOPN      4       /* [XSI] illegal operand -NOTIMP */
 299 #define ILL_ILLADR      5       /* [XSI] illegal addressing mode -NOTIMP */
 300 #define ILL_PRVREG      6       /* [XSI] privileged register -NOTIMP */
 301 #define ILL_COPROC      7       /* [XSI] coprocessor error -NOTIMP */
 302 #define ILL_BADSTK      8       /* [XSI] internal stack error -NOTIMP */
 303
 304 /* Codes for SIGFPE */
 305 #ifndef _POSIX_C_SOURCE
 306 #define FPE_NOOP        0       /* if only I knew... */
 307 #endif
 308 #define FPE_FLTDIV      1       /* [XSI] floating point divide by zero */
 309 #define FPE_FLTOVF      2       /* [XSI] floating point overflow */
 310 #define FPE_FLTUND      3       /* [XSI] floating point underflow */
 311 #define FPE_FLTRES      4       /* [XSI] floating point inexact result */
 312 #define FPE_FLTINV      5       /* [XSI] invalid floating point operation */
 313 #define FPE_FLTSUB      6       /* [XSI] subscript out of range -NOTIMP */
 314 #define FPE_INTDIV      7       /* [XSI] integer divide by zero -NOTIMP */
 315 #define FPE_INTOVF      8       /* [XSI] integer overflow -NOTIMP */
 316
 317 /* Codes for SIGSEGV */
 318 #ifndef _POSIX_C_SOURCE
 319 #define SEGV_NOOP       0       /* if only I knew... */
 320 #endif
 321 #define SEGV_MAPERR     1       /* [XSI] address not mapped to object */
 322 #define SEGV_ACCERR     2       /* [XSI] invalid permission for mapped object */
 323
 324 /* Codes for SIGBUS */
 325 #ifndef _POSIX_C_SOURCE
 326 #define BUS_NOOP        0       /* if only I knew... */
 327 #endif
 328 #define BUS_ADRALN      1       /* [XSI] Invalid address alignment */
 329 #define BUS_ADRERR      2       /* [XSI] Nonexistent physical address -NOTIMP */
 330 #define BUS_OBJERR      3       /* [XSI] Object-specific HW error - NOTIMP */
 331
 332 /* Codes for SIGTRAP */
 333 #define TRAP_BRKPT      1       /* [XSI] Process breakpoint -NOTIMP */
 334 #define TRAP_TRACE      2       /* [XSI] Process trace trap -NOTIMP */
 335
 336 /* Codes for SIGCHLD */
 337 #ifndef _POSIX_C_SOURCE
 338 #define CLD_NOOP        0       /* if only I knew... */
 339 #endif
 340 #define CLD_EXITED      1       /* [XSI] child has exited */
 341 #define CLD_KILLED      2       /* [XSI] terminated abnormally, no core file */
 342 #define CLD_DUMPED      3       /* [XSI] terminated abnormally, core file */
 343 #define CLD_TRAPPED     4       /* [XSI] traced child has trapped */
 344 #define CLD_STOPPED     5       /* [XSI] child has stopped */
 345 #define CLD_CONTINUED   6       /* [XSI] stopped child has continued */
 346
 347 /* Codes for SIGPOLL */
 348 #define POLL_IN         1       /* [XSR] Data input available */
 349 #define POLL_OUT        2       /* [XSR] Output buffers available */
 350 #define POLL_MSG        3       /* [XSR] Input message available */
 351 #define POLL_ERR        4       /* [XSR] I/O error */
 352 #define POLL_PRI        5       /* [XSR] High priority input available */
 353 #define POLL_HUP        6       /* [XSR] Device disconnected */
 354
 355 /* union for signal handlers */
 356 union __sigaction_u {
 357         void    (*__sa_handler)(int);
 358         void    (*__sa_sigaction)(int, struct __siginfo *,
 359                        void *);
 360 };
 361
 362 /* Signal vector template for Kernel user boundary */
 363 struct  __sigaction {
 364         union __sigaction_u __sigaction_u;  /* signal handler */
 365         void    (*sa_tramp)(void *, int, int, siginfo_t *, void *);
 366         sigset_t sa_mask;               /* signal mask to apply */
 367         int     sa_flags;               /* see signal options below */
 368 };
 369
 370 /*
 371  * Signal vector "template" used in sigaction call.
 372  */
 373 struct  sigaction {
 374         union __sigaction_u __sigaction_u;  /* signal handler */
 375         sigset_t sa_mask;               /* signal mask to apply */
 376         int     sa_flags;               /* see signal options below */
 377 };
 378
 379 #ifdef  BSD_KERNEL_PRIVATE
 380 #include <machine/types.h>
 381
 382 #if __DARWIN_ALIGN_NATURAL
 383 #pragma options align=natural
 384 #endif
 385
 386 union __user_sigaction_u {
 387         user_addr_t     __sa_handler;
 388         user_addr_t     __sa_sigaction;
 389 };
 390
 391 struct  user_sigaction {
 392         union __user_sigaction_u __sigaction_u;  /* signal handler */
 393         sigset_t sa_mask;               /* signal mask to apply */
 394         int     sa_flags;               /* see signal options below */
 395 };
 396
 397 struct  __user_sigaction {
 398         union __user_sigaction_u __sigaction_u;  /* signal handler */
 399         user_addr_t     sa_tramp;       /* signal mask to apply */
 400         sigset_t sa_mask;               /* signal mask to apply */
 401         int     sa_flags;               /* see signal options below */
 402 };
 403
 404 #if __DARWIN_ALIGN_NATURAL
 405 #pragma options align=reset
 406 #endif
 407
 408 #undef SIG_DFL
 409 #undef SIG_IGN
 410 #undef SIG_ERR
 411 #define  SIG_DFL        ((user_addr_t)0LL)
 412 #define  SIG_IGN        ((user_addr_t)1LL)
 413 #define  SIG_ERR        ((user_addr_t)-1LL)
 414
 415 #endif  /* BSD_KERNEL_PRIVATE */
 416
 417
 418 /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
 419 #define sa_handler      __sigaction_u.__sa_handler
 420 #define sa_sigaction    __sigaction_u.__sa_sigaction
 421
 422 #define SA_ONSTACK      0x0001  /* take signal on signal stack */
 423 #define SA_RESTART      0x0002  /* restart system on signal return */
 424 #define SA_DISABLE      0x0004  /* disable taking signals on alternate stack */
 425 #define SA_RESETHAND    0x0004  /* reset to SIG_DFL when taking signal */
 426 #define SA_NOCLDSTOP    0x0008  /* do not generate SIGCHLD on child stop */
 427 #define SA_NODEFER      0x0010  /* don't mask the signal we're delivering */
 428 #define SA_NOCLDWAIT    0x0020  /* don't keep zombies around */
 429 #define SA_SIGINFO      0x0040  /* signal handler with SA_SIGINFO args */
 430 #ifndef _POSIX_C_SOURCE
 431 #define SA_USERTRAMP    0x0100  /* do not bounce off kernel's sigtramp */
 432 /* This will provide 64bit register set in a 32bit user address space */
 433 #define SA_64REGSET     0x0200  /* signal handler with SA_SIGINFO args with 64bit regs information */
 434 #endif /* !_POSIX_C_SOURCE */
 435
 436 /*
 437  * Flags for sigprocmask:
 438  */
 439 #define SIG_BLOCK       1       /* block specified signal set */
 440 #define SIG_UNBLOCK     2       /* unblock specified signal set */
 441 #define SIG_SETMASK     3       /* set specified signal set */
 442
 443 /* POSIX 1003.1b required values. */
 444 #define SI_USER         0x10001 /* [CX] signal from kill() */
 445 #define SI_QUEUE        0x10002 /* [CX] signal from sigqueue() */
 446 #define SI_TIMER        0x10003 /* [CX] timer expiration */
 447 #define SI_ASYNCIO      0x10004 /* [CX] aio request completion */
 448 #define SI_MESGQ        0x10005 /* [CX] from message arrival on empty queue */
 449
 450 #ifndef _POSIX_C_SOURCE
 451 typedef void (*sig_t)(int);     /* type of signal function */
 452 #endif
 453
 454 /*
 455  * Structure used in sigaltstack call.
 456  */
 457 #ifdef  BSD_KERNEL_PRIVATE
 458
 459 #if __DARWIN_ALIGN_NATURAL
 460 #pragma options align=natural
 461 #endif
 462
 463 struct  user_sigaltstack {
 464         user_addr_t     ss_sp;          /* signal stack base */
 465         user_size_t     ss_size;        /* signal stack length */
 466         int             ss_flags;       /* SA_DISABLE and/or SA_ONSTACK */
 467 };
 468
 469 #if __DARWIN_ALIGN_NATURAL
 470 #pragma options align=reset
 471 #endif
 472
 473 #endif  /* BSD_KERNEL_PRIVATE */
 474
 475 #ifndef _STACK_T
 476 #define _STACK_T
 477 typedef __darwin_stack_t stack_t;
 478 #endif
 479
 480 #define SS_ONSTACK      0x0001  /* take signal on signal stack */
 481 #define SS_DISABLE      0x0004  /* disable taking signals on alternate stack */
 482 #define MINSIGSTKSZ     32768   /* (32K)minimum allowable stack */
 483 #define SIGSTKSZ        131072  /* (128K)recommended stack size */
 484
 485 #ifndef _POSIX_C_SOURCE
 486 /*
 487  * 4.3 compatibility:
 488  * Signal vector "template" used in sigvec call.
 489  */
 490 struct  sigvec {
 491         void    (*sv_handler)(int);     /* signal handler */
 492         int     sv_mask;                /* signal mask to apply */
 493         int     sv_flags;               /* see signal options below */
 494 };
 495
 496 #define SV_ONSTACK      SA_ONSTACK
 497 #define SV_INTERRUPT    SA_RESTART      /* same bit, opposite sense */
 498 #define SV_RESETHAND    SA_RESETHAND
 499 #define SV_NODEFER      SA_NODEFER
 500 #define SV_NOCLDSTOP    SA_NOCLDSTOP
 501 #define SV_SIGINFO      SA_SIGINFO
 502
 503 #define sv_onstack sv_flags     /* isn't compatibility wonderful! */
 504 #endif /* !_POSIX_C_SOURCE */
 505
 506 /*
 507  * Structure used in sigstack call.
 508  */
 509 struct  sigstack {
 510         char    *ss_sp;                 /* signal stack pointer */
 511         int     ss_onstack;             /* current status */
 512 };
 513
 514 #ifndef _POSIX_C_SOURCE
 515 /*
 516  * Macro for converting signal number to a mask suitable for
 517  * sigblock().
 518  */
 519 #define sigmask(m)      (1 << ((m)-1))
 520
 521 #ifdef  BSD_KERNEL_PRIVATE
 522 /*
 523  *      signals delivered on a per-thread basis.
 524  */
 525 #define threadmask (sigmask(SIGILL)|sigmask(SIGTRAP)|\
 526                     sigmask(SIGIOT)|sigmask(SIGEMT)|\
 527                     sigmask(SIGFPE)|sigmask(SIGBUS)|\
 528                     sigmask(SIGSEGV)|sigmask(SIGSYS)|\
 529                     sigmask(SIGPIPE))
 530 #endif  /* BSD_KERNEL_PRIVATE */
 531
 532 #define BADSIG          SIG_ERR
 533
 534 #endif  /* !_POSIX_C_SOURCE */
 535 #endif  /* !_ANSI_SOURCE */
 536
 537 /*
 538  * For historical reasons; programs expect signal's return value to be
 539  * defined by <sys/signal.h>.
 540  */
 541 __BEGIN_DECLS
 542 void    (*signal(int, void (*)(int)))(int);
 543 __END_DECLS
 544 #endif  /* !_SYS_SIGNAL_H_ */