Close file descriptors

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/back/trunk@17602 72102866-910b-0410-8b05-ffd578937521

ANNOUNCE

@@ -0,0 +1,46 @@
+ANNOUNCE
+********
+
+This is version 0.8.9 of the GNUstep GUI Backend (`gnustep-back').
+
+What is the GNUstep GUI Backend?
+================================
+
+   It is a back-end component for the GNUstep GUI Library.  The
+implementation of the GNUstep GUI Library is designed in two parts.  The
+first part is the front-end component which is independent of platform
+and display system.  This front-end is combined with a back-end
+component which handles all of the display system dependent such as
+specific calls to the X Window System.  This design allows the GNUstep
+applications to have the "look and feel" of the underlying display
+system without any changes to the application, and the library can be
+easily ported to other display systems.
+
+   The GNUstep GUI Backend is for platforms using the X-Window System or
+Window's Systems. It works via a DPS emulation engine to emulate the
+DPS functions required by the front-end system.
+
+Noteworthy changes in version `0.8.9'
+=====================================
+
+   * Much improved pasting support between X apps and GNUstep apps.
+
+   * Backend headers are no longer installed (now private).
+
+Where can you get it?  How can you compile it?
+==============================================
+
+   The gstep-back-0.8.9.tar.gz distribution file has been placed on
+`ftp.gnustep.org' in `pub/gnustep/core'.
+
+Where do I send bug reports?
+============================
+
+   Bug reports can be sent to the GNUstep bug list <bug-gnustep@gnu.org>
+
+Obtaining GNU Software
+======================
+
+   Check out the GNUstep web site. (<http://www.gnustep.org/>) and the
+GNU web site. (<http://www.gnu.org/>)
+

ChangeLog

@@ -1,3 +1,8 @@
+2003-08-31  Adam Fedor  <fedor@gnu.org>
+
+	* Tools/gpbs.m (init): Close file descriptors so gpbs can be a proper
+	daemon.
+
 2003-08-26  Adam Fedor  <fedor@gnu.org>
 
 	* Version 0.8.9

INSTALL

@@ -0,0 +1,65 @@
+Installation
+************
+
+Introduction
+============
+
+   This file documents the installation of the GNUstep Backend Library,
+`gnustep-back'. If you are installing this package as part of the
+GNUstep core package, read the file GNUstep-HOWTO for more complete
+instructions on how to install the entire GNUstep package (including
+this library).  GNUstep-HOWTO is located at <http://www.gnustep.org>
+
+   You must have installed gnustep-gui before installing this library.
+
+Configuration
+=============
+
+   Configuration is performed by running the `configure' program at a
+shell prompt. You may want to use some of the optional arguments to the
+`configure' program. Type `configure --help' for a list. GNUstep
+specific options are at the end of this list (if any).
+
+   The backend comes with several different window server and graphics
+drawing implementations. If you do nothing, the default ones will be
+chosen. You can can change this using configure. For instance, to
+choose the art graphical drawing implementation, run
+
+     configure --enable-graphics=art
+
+   Type `configure --help' for a list of graphical drawing
+implementations.
+
+   You can also change the name of the backend when configuring it.
+This is convienient if you want to have a different backend with
+different configurations. For instance, to create an xlib and and art
+backend, you could do this:
+
+     configure --enable-graphics=xlib --with-name=xlib
+     make install
+     
+     make distclean
+     configure --enable-graphics=art --with-name=art
+     make install
+
+   Before running an application, choose one backend using the defaults
+program:
+
+     defaults write NSGlobalDomain GSBackend libgnustep-xlib
+
+Compilation
+===========
+
+   To compile this library, type make. After this is complete, type make
+install (make sure you are the root user). Some additional options you
+can use with make are `debug=yes' to make a debugging version of the
+library and `shared=no' to make a static version of the library. See
+the gstep-make package for more information on these options.
+
+Installing
+==========
+
+   To install, type
+
+     make install
+

NEWS

@@ -0,0 +1,83 @@
+NEWS
+****
+
+Noteworthy changes in version `0.8.9'
+=====================================
+
+   * Much improved pasting support between X apps and GNUstep apps.
+
+   * Backend headers are no longer installed (now private).
+
+Noteworthy changes in version `0.8.8'
+=====================================
+
+   Full multi-byte/unicode support for East Asian languages was added to
+the xlib backend. The X11 server now supports use of the XIM input
+method for entering non-keyboard characters. Both contributions thanks
+to Kazunobu Kuriyama.
+
+   * Also added slightly better EWMH support.
+
+   * Art backend works with more versions of freetype.
+
+Noteworthy changes in version `0.8.7'
+=====================================
+
+   Handle NSBezierPath glyph drawing in art backend. art backend
+compiles with all freetype except 2.1.3 via ifdefs.
+
+Noteworthy changes in version `0.8.6'
+=====================================
+
+   Bug fixes. See the gnustep-gui NEWS for changes.
+
+Noteworthy changes in version `0.8.5'
+=====================================
+
+   Text system improvements. See the gnustep-gui NEWS for changes.
+
+Noteworthy changes in version `0.8.3'
+=====================================
+
+   See the gnustep-gui NEWS for changes.
+
+Noteworthy changes in version `0.8.2'
+=====================================
+
+   Improved font handling in art backend. Improved compositing  with
+transformations and clipping in art backend.
+
+Noteworthy changes in version `0.8.1'
+=====================================
+
+   art (libart-based) backend added. Use ./configure
+-enable-graphics=art to choose this backend.
+
+Noteworthy changes in version `0.8.0'
+=====================================
+
+   Bug fixes.
+
+Noteworthy changes in version `0.7.9'
+=====================================
+
+   Bug fixes.
+
+Noteworthy changes in version `0.7.8'
+=====================================
+
+   Simplified backend selection using -enable-server and
+-enable-graphics. Add -with-library-flags and -with-include-flags for
+adding additonal flags. Set name with -with-name
+
+Noteworthy changes in version `0.7.7'
+=====================================
+
+   First release. Most components extracted from xgps. The old backends,
+xgps and xdps were depreciated in favor of this new backend, simply
+named back, which can be configured for a variety of window server and
+graphics implementations, and also allow for improved code sharing.
+
+   In addition there is now a window server backend for Windows
+computers, although it is in a very alpha state.
+

README

@@ -0,0 +1,24 @@
+README
+******
+
+This is version 0.8.9 of the GNUstep GUI Backend (`gnustep-back').
+
+   Here is some introductory info to get you started:
+
+Initial reading
+===============
+
+   * The file `ANNOUNCE' contains a very brief overview of the library.
+     It also tells you where to get the most recent version.
+
+   * The file `NEWS' has the library's feature history.
+
+   * The file `INSTALL' gives instructions for installing the library.
+
+How can you help?
+=================
+
+   * Give us feedback!  Tell us what you like; tell us what you think
+     could be better.  Send us bug reports at <bug-gnustep@gnu.org>.
+
+

Tools/gpbs.m

@@ -26,6 +26,11 @@
 #include <AppKit/NSPasteboard.h>
 #include <GNUstepGUI/GSPasteboardServer.h>
 
+#include <fcntl.h>
+#ifdef	HAVE_SYSLOG_H
+#include <syslog.h>
+#endif
+
 #include <signal.h>
 #include <unistd.h>
 
@@ -37,6 +42,66 @@
 #define	NSIG	32
 #endif
 
+static int	is_daemon = 0;		/* Currently running as daemon.	 */
+static char	ebuf[2048];
+
+#ifdef HAVE_SYSLOG
+
+static int	log_priority;
+
+static void
+gpbs_log (int prio)
+{
+  if (is_daemon)
+    {
+      syslog (log_priority | prio, ebuf);
+    }
+  else if (prio == LOG_INFO)
+    {
+      write (1, ebuf, strlen (ebuf));
+      write (1, "\n", 1);
+    }
+  else
+    {
+      write (2, ebuf, strlen (ebuf));
+      write (2, "\n", 1);
+    }
+
+  if (prio == LOG_CRIT)
+    {
+      if (is_daemon)
+	{
+	  syslog (LOG_CRIT, "exiting.");
+	}
+      else
+     	{
+	  fprintf (stderr, "exiting.\n");
+	  fflush (stderr);
+	}
+      exit(EXIT_FAILURE);
+    }
+}
+#else
+
+#define	LOG_CRIT	2
+#define LOG_DEBUG	0
+#define LOG_ERR		1
+#define LOG_INFO	0
+#define LOG_WARNING	0
+void
+gpbs_log (int prio)
+{
+  write (2, ebuf, strlen (ebuf));
+  write (2, "\n", 1);
+  if (prio == LOG_CRIT)
+    {
+      fprintf (stderr, "exiting.\n");
+      fflush (stderr);
+      exit(EXIT_FAILURE);
+    }
+}
+#endif
+
 @class PasteboardServer;
 @class PasteboardObject;
 
@@ -1047,8 +1112,9 @@ ihandler(int sig)
 static void
 init(int argc, char** argv)
 {
+  NSUserDefaults *defs;
   NSArray	*args = [[NSProcessInfo processInfo] arguments];
-  unsigned	count;
+  unsigned	count, c;
 
   for (count = 1; count < [args count]; count++)
     {
@@ -1122,6 +1188,7 @@ init(int argc, char** argv)
       exit(EXIT_SUCCESS);
     }
 #else
+      is_daemon = 1;
       switch (fork())
 	{
 	  case -1:
@@ -1148,6 +1215,48 @@ init(int argc, char** argv)
 	}
 #endif 
     }
+
+  /*
+   *	Ensure we don't have any open file descriptors which may refer
+   *	to sockets bound to ports we may try to use.
+   *
+   *	Use '/dev/null' for stdin and stdout.
+   */
+  for (c = 0; c < FD_SETSIZE; c++)
+    {
+      if (is_daemon || (c != 2))
+	{
+	  (void)close(c);
+	}
+    }
+  if (open("/dev/null", O_RDONLY) != 0)
+    {
+      sprintf(ebuf, "failed to open stdin from /dev/null (%s)\n",
+	strerror(errno));
+      gpbs_log(LOG_CRIT);
+      exit(EXIT_FAILURE);
+    }
+  if (open("/dev/null", O_WRONLY) != 1)
+    {
+      sprintf(ebuf, "failed to open stdout from /dev/null (%s)\n",
+	strerror(errno));
+      gpbs_log(LOG_CRIT);
+      exit(EXIT_FAILURE);
+    }
+  if (is_daemon && open("/dev/null", O_WRONLY) != 2)
+    {
+      sprintf(ebuf, "failed to open stderr from /dev/null (%s)\n",
+	strerror(errno));
+      gpbs_log(LOG_CRIT);
+      exit(EXIT_FAILURE);
+    }
+
+    /*
+     * Make gpbs logging go to syslog unless overridden by user.
+     */
+    defs = [NSUserDefaults standardUserDefaults];
+    [defs registerDefaults: [NSDictionary dictionaryWithObjectsAndKeys:
+      @"YES", @"GSLogSyslog", nil]];
 }