/usr/include/GNUstep/Foundation/NSNotification.h is in libgnustep-base-dev 1.22.1-4+deb7u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97  | /** Interface for NSNotification and NSNotificationCenter for GNUstep
   Copyright (C) 1996,1999 Free Software Foundation, Inc.
   Written by:  Andrew Kachites McCallum <mccallum@gnu.ai.mit.edu>
   Rewrite by:  Richard Frith-Macdonald <rfm@gnu.org>
   Created: March 1996
   This file is part of the GNUstep Base Library.
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
   
   This 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 Lesser General Public
   License along with this library; if not, write to the Free
   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02111 USA.
  AutogsdocSource: NSNotification.m
  AutogsdocSource: NSNotificationCenter.m
*/
#ifndef __NSNotification_h_GNUSTEP_BASE_INCLUDE
#define __NSNotification_h_GNUSTEP_BASE_INCLUDE
#import	<GNUstepBase/GSVersionMacros.h>
#import	<Foundation/NSObject.h>
#import	<Foundation/NSMapTable.h>
#if	defined(__cplusplus)
extern "C" {
#endif
@class NSString;
@class NSDictionary;
@class NSLock;
@interface NSNotification : NSObject <NSCopying, NSCoding>
/* Creating a Notification Object */
+ (NSNotification*) notificationWithName: (NSString*)name
				  object: (id)object;
+ (NSNotification*) notificationWithName: (NSString*)name
				  object: (id)object
			        userInfo: (NSDictionary*)info;
/* Querying a Notification Object */
- (NSString*) name;
- (id) object;
- (NSDictionary*) userInfo;
@end
@interface NSNotificationCenter : NSObject
{
#if	GS_EXPOSE(NSNotificationCenter)
@private
  void	*_table;
#endif
}
+ (NSNotificationCenter*) defaultCenter;
- (void) addObserver: (id)observer
            selector: (SEL)selector
                name: (NSString*)name
              object: (id)object;
- (void) removeObserver: (id)observer;
- (void) removeObserver: (id)observer
                   name: (NSString*)name
                 object: (id)object;
- (void) postNotification: (NSNotification*)notification;
- (void) postNotificationName: (NSString*)name
                       object: (id)object;
- (void) postNotificationName: (NSString*)name
                       object: (id)object
                     userInfo: (NSDictionary*)info;
@end
#if	defined(__cplusplus)
}
#endif
#endif /*__NSNotification_h_GNUSTEP_BASE_INCLUDE */
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