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diff --git a/bits/siginfo.h b/bits/siginfo.h
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+/* siginfo_t, sigevent and constants.  Stub version.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _SIGNAL_H
+# error "Never include this file directly.  Use <signal.h> instead"
+#endif
+
+typedef struct siginfo
+  {
+    int si_signo;		/* Signal number.  */
+    int si_errno;		/* If non-zero, an errno value associated with
+				   this signal, as defined in <errno.h>.  */
+    int si_code;		/* Signal code.  */
+    __pid_t si_pid;		/* Sending process ID.  */
+    __uid_t si_uid;		/* Real user ID of sending process.  */
+    void *si_addr;		/* Address of faulting instruction.  */
+    int si_status;		/* Exit value or signal.  */
+    long int si_band;		/* Band event for SIGPOLL.  */
+    union sigval si_value;	/* Signal value.  */
+  } siginfo_t;
+
+
+/* Values for `si_code'.  Positive values are reserved for kernel-generated
+   signals.  */
+enum
+{
+  SI_ASYNCIO = -4,		/* Sent by AIO completion.  */
+#define SI_ASYNCIO	SI_ASYNCIO
+  SI_MESGQ,			/* Sent by real time mesq state change.  */
+#define SI_MESGQ	SI_MESGQ
+  SI_TIMER,			/* Sent by timer expiration.  */
+#define SI_TIMER	SI_TIMER
+  SI_QUEUE,			/* Sent by sigqueue.  */
+#define SI_QUEUE	SI_QUEUE
+  SI_USER			/* Sent by kill, sigsend, raise.  */
+#define SI_USER		SI_USER
+};
+
+
+/* `si_code' values for SIGILL signal.  */
+enum
+{
+  ILL_ILLOPC = 1,		/* Illegal opcode.  */
+#define ILL_ILLOPC	ILL_ILLOPC
+  ILL_ILL_OPN,			/* Illegal operand.  */
+#define ILL_ILLOPN	ILL_ILLOPN
+  ILL_ILLADR,			/* Illegal addressing mode.  */
+#define ILL_ILLADR	ILL_ILLADR
+  ILL_ILLTRP,			/* Illegal trap. */
+#define ILL_ILLTRP	ILL_ILLTRP
+  ILL_PRVOPC,			/* Privileged opcode.  */
+#define ILL_PRVOPC	ILL_PRVOPC
+  ILL_PRVREG,			/* Privileged register.  */
+#define ILL_PRVREG	ILL_PRVREG
+  ILL_COPROC,			/* Coprocessor error.  */
+#define ILL_COPROC	ILL_COPROC
+  ILL_BADSTK			/* Internal stack error.  */
+#define ILL_BADSTK	ILL_BADSTK
+};
+
+/* `si_code' values for SIGFPE signal.  */
+enum
+{
+  FPE_INTDIV = 1,		/* Integer divide by zero.  */
+#define FPE_INTDIV	FPE_INTDIV
+  FPE_INTOVF,			/* Integer overflow.  */
+#define FPE_INTOVF	FPE_INTOVF
+  FPE_FLTDIV,			/* Floating point divide by zero.  */
+#define FPE_FLTDIV	FPE_FLTDIV
+  FPE_FLTOVF,			/* Floating point overflow.  */
+#define FPE_FLTOVF	FPE_FLTOVF
+  FPE_FLTUND,			/* Floating point underflow.  */
+#define FPE_FLTUND	FPE_FLTUND
+  FPE_FLTRES,			/* Floating point inexact result.  */
+#define FPE_FLTRES	FPE_FLTRES
+  FPE_FLTINV,			/* Floating point invalid operation.  */
+#define FPE_FLTINV	FPE_FLTINV
+  FPE_FLTSUB			/* Subscript out of range.  */
+#define FPE_FLTSUB	FPE_FLTSUB
+};
+
+/* `si_code' values for SIGSEGV signal.  */
+enum
+{
+  SEGV_MAPERR = 1,		/* Address not mapped to object.  */
+#define SEGV_MAPERR	SEGV_MAPERR
+  SEGV_ACCERR			/* Invalid permissions for mapped object.  */
+#define SEGV_ACCERR	SEGV_ACCERR
+};
+
+/* `si_code' values for SIGBUS signal.  */
+enum
+{
+  BUS_ADRALN = 1,		/* Invalid address alignment.  */
+#define BUS_ADRALN	BUS_ADRALN
+  BUS_ADRERR,			/* Non-existant physical address.  */
+#define BUS_ADRERR	BUS_ADRERR
+  BUS_OBJERR			/* Object specific hardware error.  */
+#define BUS_OBJERR	BUS_OBJERR
+};
+
+/* `si_code' values for SIGTRAP signal.  */
+enum
+{
+  TRAP_BRKPT = 1,		/* Process breakpoint.  */
+#define TRAP_BRKPT	TRAP_BRKPT
+  TRAP_TRACE			/* Process trace trap.  */
+#define TRAP_TRACE	TRAP_TRACE
+};
+
+/* `si_code' values for SIGCHLD signal.  */
+enum
+{
+  CLD_EXITED = 1,		/* Child has exited.  */
+#define CLD_EXITED	CLD_EXITED
+  CLD_KILLED,			/* Child was killed.  */
+#define CLD_KILLED	CLD_KILLED
+  CLD_DUMPED,			/* Child terminated abnormally.  */
+#define CLD_DUMPED	CLD_DUMPED
+  CLD_TRAPPED,			/* Traced child has trapped.  */
+#define CLD_TRAPPED	CLD_TRAPPED
+  CLD_STOPPED,			/* Child has stopped.  */
+#define CLD_STOPPED	CLD_STOPPED
+  CLD_CONTINUED			/* Stopped child has continued.  */
+#define CLD_CONTINUED	CLD_CONTINUED
+};
+
+/* `si_code' values for SIGPOLL signal.  */
+enum
+{
+  POLL_IN = 1,			/* Data input available.  */
+#define POLL_IN		POLL_IN
+  POLL_OUT,			/* Output buffers available.  */
+#define POLL_OUT	POLL_OUT
+  POLL_MSG,			/* Input message available.   */
+#define POLL_MSG	POLL_MSG
+  POLL_ERR,			/* I/O error.  */
+#define POLL_ERR	POLL_ERR
+  POLL_PRI,			/* High priority input available.  */
+#define POLL_PRI	POLL_PRI
+  POLL_HUP			/* Device disconnected.  */
+#define POLL_HUP	POLL_HUP
+};
+
+
+/* Structure to transport application-defined values with signals.  */
+#define SIGEV_MAX_SIZE	64
+#define SIGEV_PAD_SIZE	((SIGEV_MAX_SIZE / sizeof (int)) - 3)
+
+typedef struct sigevent
+  {
+    sigval_t sigev_value;
+    int sigev_signo;
+    int sigev_notify;
+    void (*sigev_notify_function) __P ((sigval_t)); /* Function to start.  */
+    void *sigev_notify_attributes;		    /* Really pthread_attr_t.*/
+  } sigevent_t;
+
+/* `sigev_notify' values.  */
+enum
+{
+  SIGEV_SIGNAL = 0,		/* Notify via signal.  */
+#define SIGEV_SIGNAL	SIGEV_SIGNAL
+  SIGEV_NONE,			/* Other notification: meaningless.  */
+#define SIGEV_NONE	SIGEV_NONE
+  SIGEV_THREAD			/* Deliver via thread creation.  */
+#define SIGEV_THREAD	SIGEV_THREAD
+};