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1: /* 2: * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved. 3: * 4: * @APPLE_OSREFERENCE_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. The rights granted to you under the License 10: * may not be used to create, or enable the creation or redistribution of, 11: * unlawful or unlicensed copies of an Apple operating system, or to 12: * circumvent, violate, or enable the circumvention or violation of, any 13: * terms of an Apple operating system software license agreement. 14: * 15: * Please obtain a copy of the License at 16: * http://www.opensource.apple.com/apsl/ and read it before using this file. 17: * 18: * The Original Code and all software distributed under the License are 19: * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22: * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23: * Please see the License for the specific language governing rights and 24: * limitations under the License. 25: * 26: * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27: */ 28: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ 29: /* 30: * Copyright (c) 1982, 1986, 1989, 1991, 1993 31: * The Regents of the University of California. All rights reserved. 32: * (c) UNIX System Laboratories, Inc. 33: * All or some portions of this file are derived from material licensed 34: * to the University of California by American Telephone and Telegraph 35: * Co. or Unix System Laboratories, Inc. and are reproduced herein with 36: * the permission of UNIX System Laboratories, Inc. 37: * 38: * Redistribution and use in source and binary forms, with or without 39: * modification, are permitted provided that the following conditions 40: * are met: 41: * 1. Redistributions of source code must retain the above copyright 42: * notice, this list of conditions and the following disclaimer. 43: * 2. Redistributions in binary form must reproduce the above copyright 44: * notice, this list of conditions and the following disclaimer in the 45: * documentation and/or other materials provided with the distribution. 46: * 3. All advertising materials mentioning features or use of this software 47: * must display the following acknowledgement: 48: * This product includes software developed by the University of 49: * California, Berkeley and its contributors. 50: * 4. Neither the name of the University nor the names of its contributors 51: * may be used to endorse or promote products derived from this software 52: * without specific prior written permission. 53: * 54: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64: * SUCH DAMAGE. 65: * 66: * @(#)signal.h 8.2 (Berkeley) 1/21/94 67: */ 68: 69: #ifndef _SYS_SIGNAL_H_ 70: #define _SYS_SIGNAL_H_ 71: 72: #include <sys/cdefs.h> 73: #include <sys/appleapiopts.h> 74: #include <Availability.h> 75: 76: #define __DARWIN_NSIG 32 /* counting 0; could be 33 (mask is 1-32) */ 77: 78: #if !defined(_ANSI_SOURCE) && (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) 79: #define NSIG __DARWIN_NSIG 80: #endif 81: 82: #include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */ 83: 84: #define SIGHUP 1 /* hangup */ 85: #define SIGINT 2 /* interrupt */ 86: #define SIGQUIT 3 /* quit */ 87: #define SIGILL 4 /* illegal instruction (not reset when caught) */ 88: #define SIGTRAP 5 /* trace trap (not reset when caught) */ 89: #define SIGABRT 6 /* abort() */ 90: #if (defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE)) 91: #define SIGPOLL 7 /* pollable event ([XSR] generated, not supported) */ 92: #else /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */ 93: #define SIGIOT SIGABRT /* compatibility */ 94: #define SIGEMT 7 /* EMT instruction */ 95: #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */ 96: #define SIGFPE 8 /* floating point exception */ 97: #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 98: #define SIGBUS 10 /* bus error */ 99: #define SIGSEGV 11 /* segmentation violation */ 100: #define SIGSYS 12 /* bad argument to system call */ 101: #define SIGPIPE 13 /* write on a pipe with no one to read it */ 102: #define SIGALRM 14 /* alarm clock */ 103: #define SIGTERM 15 /* software termination signal from kill */ 104: #define SIGURG 16 /* urgent condition on IO channel */ 105: #define SIGSTOP 17 /* sendable stop signal not from tty */ 106: #define SIGTSTP 18 /* stop signal from tty */ 107: #define SIGCONT 19 /* continue a stopped process */ 108: #define SIGCHLD 20 /* to parent on child stop or exit */ 109: #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 110: #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ 111: #if (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) 112: #define SIGIO 23 /* input/output possible signal */ 113: #endif 114: #define SIGXCPU 24 /* exceeded CPU time limit */ 115: #define SIGXFSZ 25 /* exceeded file size limit */ 116: #define SIGVTALRM 26 /* virtual time alarm */ 117: #define SIGPROF 27 /* profiling time alarm */ 118: #if (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) 119: #define SIGWINCH 28 /* window size changes */ 120: #define SIGINFO 29 /* information request */ 121: #endif 122: #define SIGUSR1 30 /* user defined signal 1 */ 123: #define SIGUSR2 31 /* user defined signal 2 */ 124: 125: #if defined(_ANSI_SOURCE) || __DARWIN_UNIX03 || defined(__cplusplus) 126: /* 127: * Language spec sez we must list exactly one parameter, even though we 128: * actually supply three. Ugh! 129: * SIG_HOLD is chosen to avoid KERN_SIG_* values in <sys/signalvar.h> 130: */ 131: #define SIG_DFL (void (*)(int))0 132: #define SIG_IGN (void (*)(int))1 133: #define SIG_HOLD (void (*)(int))5 134: #define SIG_ERR ((void (*)(int))-1) 135: #else 136: /* DO NOT REMOVE THE COMMENTED OUT int: fixincludes needs to see them */ 137: #define SIG_DFL (void (*)(/*int*/))0 138: #define SIG_IGN (void (*)(/*int*/))1 139: #define SIG_HOLD (void (*)(/*int*/))5 140: #define SIG_ERR ((void (*)(/*int*/))-1) 141: #endif 142: 143: #ifndef _ANSI_SOURCE 144: #include <sys/_types.h> 145: 146: #include <machine/_mcontext.h> 147: 148: #include <sys/_pthread/_pthread_attr_t.h> 149: 150: #include <sys/_types/_sigaltstack.h> 151: #include <sys/_types/_ucontext.h> 152: 153: #include <sys/_types/_pid_t.h> 154: #include <sys/_types/_sigset_t.h> 155: #include <sys/_types/_size_t.h> 156: #include <sys/_types/_uid_t.h> 157: 158: union sigval { 159: /* Members as suggested by Annex C of POSIX 1003.1b. */ 160: int sival_int; 161: void *sival_ptr; 162: }; 163: 164: #define SIGEV_NONE 0 /* No async notification */ 165: #define SIGEV_SIGNAL 1 /* aio - completion notification */ 166: #define SIGEV_THREAD 3 /* [NOTIMP] [RTS] call notification function */ 167: 168: struct sigevent { 169: int sigev_notify; /* Notification type */ 170: int sigev_signo; /* Signal number */ 171: union sigval sigev_value; /* Signal value */ 172: void (*sigev_notify_function)(union sigval); /* Notification function */ 173: pthread_attr_t *sigev_notify_attributes; /* Notification attributes */ 174: }; 175: 176: 177: typedef struct __siginfo { 178: int si_signo; /* signal number */ 179: int si_errno; /* errno association */ 180: int si_code; /* signal code */ 181: pid_t si_pid; /* sending process */ 182: uid_t si_uid; /* sender's ruid */ 183: int si_status; /* exit value */ 184: void *si_addr; /* faulting instruction */ 185: union sigval si_value; /* signal value */ 186: long si_band; /* band event for SIGPOLL */ 187: unsigned long __pad[7]; /* Reserved for Future Use */ 188: } siginfo_t; 189: 190: 191: /* 192: * When the signal is SIGILL or SIGFPE, si_addr contains the address of 193: * the faulting instruction. 194: * When the signal is SIGSEGV or SIGBUS, si_addr contains the address of 195: * the faulting memory reference. Although for x86 there are cases of SIGSEGV 196: * for which si_addr cannot be determined and is NULL. 197: * If the signal is SIGCHLD, the si_pid field will contain the child process ID, 198: * si_status contains the exit value or signal and 199: * si_uid contains the real user ID of the process that sent the signal. 200: */ 201: 202: /* Values for si_code */ 203: 204: /* Codes for SIGILL */ 205: #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 206: #define ILL_NOOP 0 /* if only I knew... */ 207: #endif 208: #define ILL_ILLOPC 1 /* [XSI] illegal opcode */ 209: #define ILL_ILLTRP 2 /* [XSI] illegal trap */ 210: #define ILL_PRVOPC 3 /* [XSI] privileged opcode */ 211: #define ILL_ILLOPN 4 /* [XSI] illegal operand -NOTIMP */ 212: #define ILL_ILLADR 5 /* [XSI] illegal addressing mode -NOTIMP */ 213: #define ILL_PRVREG 6 /* [XSI] privileged register -NOTIMP */ 214: #define ILL_COPROC 7 /* [XSI] coprocessor error -NOTIMP */ 215: #define ILL_BADSTK 8 /* [XSI] internal stack error -NOTIMP */ 216: 217: /* Codes for SIGFPE */ 218: #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 219: #define FPE_NOOP 0 /* if only I knew... */ 220: #endif 221: #define FPE_FLTDIV 1 /* [XSI] floating point divide by zero */ 222: #define FPE_FLTOVF 2 /* [XSI] floating point overflow */ 223: #define FPE_FLTUND 3 /* [XSI] floating point underflow */ 224: #define FPE_FLTRES 4 /* [XSI] floating point inexact result */ 225: #define FPE_FLTINV 5 /* [XSI] invalid floating point operation */ 226: #define FPE_FLTSUB 6 /* [XSI] subscript out of range -NOTIMP */ 227: #define FPE_INTDIV 7 /* [XSI] integer divide by zero */ 228: #define FPE_INTOVF 8 /* [XSI] integer overflow */ 229: 230: /* Codes for SIGSEGV */ 231: #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 232: #define SEGV_NOOP 0 /* if only I knew... */ 233: #endif 234: #define SEGV_MAPERR 1 /* [XSI] address not mapped to object */ 235: #define SEGV_ACCERR 2 /* [XSI] invalid permission for mapped object */ 236: 237: /* Codes for SIGBUS */ 238: #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 239: #define BUS_NOOP 0 /* if only I knew... */ 240: #endif 241: #define BUS_ADRALN 1 /* [XSI] Invalid address alignment */ 242: #define BUS_ADRERR 2 /* [XSI] Nonexistent physical address -NOTIMP */ 243: #define BUS_OBJERR 3 /* [XSI] Object-specific HW error - NOTIMP */ 244: 245: /* Codes for SIGTRAP */ 246: #define TRAP_BRKPT 1 /* [XSI] Process breakpoint -NOTIMP */ 247: #define TRAP_TRACE 2 /* [XSI] Process trace trap -NOTIMP */ 248: 249: /* Codes for SIGCHLD */ 250: #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 251: #define CLD_NOOP 0 /* if only I knew... */ 252: #endif 253: #define CLD_EXITED 1 /* [XSI] child has exited */ 254: #define CLD_KILLED 2 /* [XSI] terminated abnormally, no core file */ 255: #define CLD_DUMPED 3 /* [XSI] terminated abnormally, core file */ 256: #define CLD_TRAPPED 4 /* [XSI] traced child has trapped */ 257: #define CLD_STOPPED 5 /* [XSI] child has stopped */ 258: #define CLD_CONTINUED 6 /* [XSI] stopped child has continued */ 259: 260: /* Codes for SIGPOLL */ 261: #define POLL_IN 1 /* [XSR] Data input available */ 262: #define POLL_OUT 2 /* [XSR] Output buffers available */ 263: #define POLL_MSG 3 /* [XSR] Input message available */ 264: #define POLL_ERR 4 /* [XSR] I/O error */ 265: #define POLL_PRI 5 /* [XSR] High priority input available */ 266: #define POLL_HUP 6 /* [XSR] Device disconnected */ 267: 268: /* union for signal handlers */ 269: union __sigaction_u { 270: void (*__sa_handler)(int); 271: void (*__sa_sigaction)(int, struct __siginfo *, 272: void *); 273: }; 274: 275: /* Signal vector template for Kernel user boundary */ 276: struct __sigaction { 277: union __sigaction_u __sigaction_u; /* signal handler */ 278: void (*sa_tramp)(void *, int, int, siginfo_t *, void *); 279: sigset_t sa_mask; /* signal mask to apply */ 280: int sa_flags; /* see signal options below */ 281: }; 282: 283: /* 284: * Signal vector "template" used in sigaction call. 285: */ 286: struct sigaction { 287: union __sigaction_u __sigaction_u; /* signal handler */ 288: sigset_t sa_mask; /* signal mask to apply */ 289: int sa_flags; /* see signal options below */ 290: }; 291: 292: 293: 294: /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */ 295: #define sa_handler __sigaction_u.__sa_handler 296: #define sa_sigaction __sigaction_u.__sa_sigaction 297: 298: #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 299: #define SA_RESTART 0x0002 /* restart system on signal return */ 300: #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 301: #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 302: #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 303: #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ 304: #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ 305: #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 306: #define SA_USERTRAMP 0x0100 /* do not bounce off kernel's sigtramp */ 307: /* This will provide 64bit register set in a 32bit user address space */ 308: #define SA_64REGSET 0x0200 /* signal handler with SA_SIGINFO args with 64bit regs information */ 309: #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */ 310: 311: /* the following are the only bits we support from user space, the 312: * rest are for kernel use only. 313: */ 314: #define SA_USERSPACE_MASK (SA_ONSTACK | SA_RESTART | SA_RESETHAND | SA_NOCLDSTOP | SA_NODEFER | SA_NOCLDWAIT | SA_SIGINFO) 315: 316: /* 317: * Flags for sigprocmask: 318: */ 319: #define SIG_BLOCK 1 /* block specified signal set */ 320: #define SIG_UNBLOCK 2 /* unblock specified signal set */ 321: #define SIG_SETMASK 3 /* set specified signal set */ 322: 323: /* POSIX 1003.1b required values. */ 324: #define SI_USER 0x10001 /* [CX] signal from kill() */ 325: #define SI_QUEUE 0x10002 /* [CX] signal from sigqueue() */ 326: #define SI_TIMER 0x10003 /* [CX] timer expiration */ 327: #define SI_ASYNCIO 0x10004 /* [CX] aio request completion */ 328: #define SI_MESGQ 0x10005 /* [CX] from message arrival on empty queue */ 329: 330: #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 331: typedef void (*sig_t)(int); /* type of signal function */ 332: #endif 333: 334: /* 335: * Structure used in sigaltstack call. 336: */ 337: 338: #define SS_ONSTACK 0x0001 /* take signal on signal stack */ 339: #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 340: #define MINSIGSTKSZ 32768 /* (32K)minimum allowable stack */ 341: #define SIGSTKSZ 131072 /* (128K)recommended stack size */ 342: 343: #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 344: /* 345: * 4.3 compatibility: 346: * Signal vector "template" used in sigvec call. 347: */ 348: struct sigvec { 349: void (*sv_handler)(int); /* signal handler */ 350: int sv_mask; /* signal mask to apply */ 351: int sv_flags; /* see signal options below */ 352: }; 353: 354: #define SV_ONSTACK SA_ONSTACK 355: #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 356: #define SV_RESETHAND SA_RESETHAND 357: #define SV_NODEFER SA_NODEFER 358: #define SV_NOCLDSTOP SA_NOCLDSTOP 359: #define SV_SIGINFO SA_SIGINFO 360: 361: #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 362: #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */ 363: 364: /* 365: * Structure used in sigstack call. 366: */ 367: struct sigstack { 368: char *ss_sp; /* signal stack pointer */ 369: int ss_onstack; /* current status */ 370: }; 371: 372: #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 373: /* 374: * Macro for converting signal number to a mask suitable for 375: * sigblock(). 376: */ 377: #define sigmask(m) (1 << ((m)-1)) 378: 379: 380: #define BADSIG SIG_ERR 381: 382: #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */ 383: #endif /* !_ANSI_SOURCE */ 384: 385: /* 386: * For historical reasons; programs expect signal's return value to be 387: * defined by <sys/signal.h>. 388: */ 389: __BEGIN_DECLS 390: void (*signal(int, void (*)(int)))(int); 391: __END_DECLS 392: #endif /* !_SYS_SIGNAL_H_ */ 393: