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@@ -0,0 +1,217 @@
+#ifndef CYGONCE_LIBC_SIGNAL_H
+#define CYGONCE_LIBC_SIGNAL_H
+//========================================================================
+//
+//      signal.h
+//
+//      Definitions for ISO C and POSIX 1003.1 signals
+//
+//========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
+// License for the specific language governing rights and limitations under
+// the License.
+// 
+// The Original Code is eCos - Embedded Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):     jlarmour
+// Contributors:  jlarmour
+// Date:          1999-02-03
+// Purpose:       Provides description of interface to ISO C and POSIX 1003.1
+//                signal functionality
+// Description:   
+// Usage:         #include <signal.h>
+//
+//####DESCRIPTIONEND####
+//
+//========================================================================
+
+// CONFIGURATION
+
+#include <pkgconf/libc.h>          // C library configuration
+
+#ifdef CYGPKG_LIBC_SIGNALS
+
+// INCLUDES
+
+#include <cyg/infra/cyg_type.h>    // Common type definitions and support
+
+#ifdef CYGSEM_LIBC_SIGNALS_POSIX
+# include <unistd.h>               // _POSIX_* macros
+#endif
+
+
+// TYPE DEFINITIONS
+
+// Integral type that can be accessed atomically - from ISO C 7.7
+typedef cyg_atomic sig_atomic_t;
+
+// Type of signal handler functions
+typedef void (*__sighandler_t)(int);
+
+#ifdef CYGSEM_LIBC_SIGNALS_POSIX
+
+// Signal sets from POSIX 1003.1 chap 3.3.3 and other chaps
+typedef cyg_uint32 sigset_t;
+
+// POSIX 1003.1 chap 3.3.1.2
+union sigval {
+    int   sival_int;    // used when application-defined value is an int
+    void *sival_ptr;    // used when application-defined value is a pointer
+};
+
+// Signal information structure passed to a __siginfoaction_t style handler
+// from POSIX 1003.1 chap 3.3.1.3
+typedef struct {
+    int si_signo;           // signal number
+    int si_code;            // cause of signal
+    union sigval si_value;  // signal value
+} siginfo_t;
+
+
+// Type of signal handler used if SA_SIGINFO is set in flags to sigaction
+// from POSIX 1003.1 chap 3.3.1.3
+typedef void (*__siginfoaction_t)(int __signo, siginfo_t *__info,
+                                  void *__context);
+
+// struct sigaction describes the action to be taken when we get a signal
+// From POSIX 1003.1 chap. 3.3.4.2
+struct sigaction {
+    sigset_t sa_mask;                   // Additional signals to be blocked
+    int sa_flags;                       // Special flags
+    union {
+        __sighandler_t sa_handler;      // signal handler
+        __siginfoaction_t sa_sigaction; // Function to call instead of
+                                        // sa_handler if SA_SIGINFO is
+                                        // set in sa_flags
+    } __sigactionhandler;
+#define sa_handler   __sigactionhandler.sa_handler
+#define sa_sigaction __sigactionhandler.sa_sigaction
+};
+
+
+#endif // ifdef CYGSEM_LIBC_SIGNALS_POSIX
+
+
+// CONSTANTS
+
+// Signal handlers for use with signal(). We avoid 0 because in an embedded
+// system this may be e.g. start of ROM and thus a possible function pointer
+// for reset!
+
+#define SIG_DFL ((__sighandler_t) 1)      // Default action
+#define SIG_IGN ((__sighandler_t) 2)      // Ignore action
+#define SIG_ERR ((__sighandler_t)-1)      // Error return
+
+// NB. We do not need to restrict SIG* definitions (e.g. by eliminating
+// POSIX signals) when using strict ISO C (permitted in 7.7)
+
+#define SIGNULL   0    // Reserved signal - do not use (POSIX 3.3.1.1)
+#define SIGHUP    1    // Hangup on controlling terminal (POSIX)
+#define SIGINT    2    // Interactive attention (ISO C)
+#define SIGQUIT   3    // Interactive termination (POSIX)
+#define SIGILL    4    // Illegal instruction (not reset when caught) (ISO C)
+#define SIGTRAP   5    // Trace trap (not reset when caught)
+#define SIGIOT    6    // IOT instruction
+#define SIGABRT   6    // Abnormal termination - used by abort() (ISO C)
+#define SIGEMT    7    // EMT instruction
+#define SIGFPE    8    // Floating Point Exception e.g. div by 0 (ISO C)
+#define SIGKILL   9    // Kill (cannot be caught or ignored) (POSIX)
+#if 1 // FIXME - should be #ifdef _POSIX_MEMORY_PROTECTION?
+# define SIGBUS   10   // Bus error (POSIX)
+#endif
+#define SIGSEGV   11   // Invalid memory reference (ISO C)
+#define SIGSYS    12   // Bad argument to system call (used by anything?)
+#define SIGPIPE   13   // Write on a pipe with no one to read it (POSIX)
+#define SIGALRM   14   // Alarm timeout (POSIX)
+#define SIGTERM   15   // Software termination request (ISO C)
+#define SIGUSR1   16   // Application-defined signal 1 (POSIX)
+#define SIGUSR2   17   // Application-defined signal 2 (POSIX)
+
+#define CYGNUM_LIBC_SIGNALS 18  // Maximum signal number + 1
+
+#ifdef _POSIX_JOB_CONTROL
+# define SIGCHLD  18   // Child process terminated or stopped (POSIX)
+# define SIGCONT  19   // Continue if stopped (POSIX)
+# define SIGSTOP  20   // Stop (cannot be caught or ignored) (POSIX)
+# define SIGTSTP  21   // Interactive stop (POSIX)
+# define SIGTTIN  22   // Terminal read attempted by backgrounded
+                       // process (POSIX)
+# define SIGTTOU  23   // Terminal write attempted by backgrounded
+                       // process (POSIX)
+#undef CYGNUM_LIBC_SIGNALS
+#define CYGNUM_LIBC_SIGNALS 24
+#endif
+
+// FIXME - strictly by POSIX in 3.3.1.1 we should define SIGRTMIN/SIGRTMAX
+// But if so, to what value if it _isn't_ supported?!
+
+#ifdef CYGSEM_LIBC_SIGNALS_POSIX
+// sa_flag bits in struct sigaction
+#define SA_NOCLDSTOP 1   // Don't generate SIGCHLD when children stop
+#define SA_SIGINFO   2   // Use the __siginfoaction_t style signal
+                         // handler, instead of the single argument handler
+#endif // ifdef CYGSEM_LIBC_SIGNALS_POSIX
+
+
+// FUNCTION PROTOTYPES
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+//===========================================================================
+
+// ISO C functions
+
+//////////////////////////////
+// signal() - ISO C 7.7.1   //
+//////////////////////////////
+//
+// Installs a new signal handler for the specified signal, and returns
+// the old handler
+//
+
+extern __sighandler_t
+signal(int __sig, __sighandler_t __handler);
+
+///////////////////////////
+// raise() - ISO C 7.7.2 //
+///////////////////////////
+//
+// Raises the signal, which will cause the current signal handler for
+// that signal to be called
+//
+
+extern int
+raise(int __sig);
+
+
+#ifdef __cplusplus
+} // extern "C"
+#endif 
+
+#include <signal.inl>
+
+#endif // ifdef CYGPKG_LIBC_SIGNALS
+
+#endif // CYGONCE_LIBC_SIGNAL_H multiple inclusion protection
+
+// EOF signal.h