xfree86: Search for a system xorg.conf.d

In addition to the conf files found in /etc/X11 or $sysconfdir/X11 used
for local administration, we also reserve a system directory for vendor
and package usage. The simple search path is:

	/usr/share/X11/xorg.conf.d
	$datadir/X11/xorg.conf.d

Files from these directories will have the lowest config priority. The
directory $datadir/X11/xorg.conf.d is exported from xorg-server.pc in
the variable "sysconfigdir". Packages should install their .conf files
to the directory specified by:

	`pkg-config --variable=sysconfigdir xorg-server`

Signed-off-by: Dan Nicholson <dbn.lists@gmail.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

4 files changed, 26 insertions, 2 deletions

diff --git a/configure.ac b/configure.ac
index 591d2b445..0d0dffdec 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1792,8 +1792,10 @@ if test "x$XORG" = xyes; then
 	AC_SUBST([driverdir])
 	sdkdir="$includedir/xorg"
 	extdir="$includedir/X11/extensions"
+	sysconfigdir="$datadir/X11/$XF86CONFIGDIR"
 	AC_SUBST([sdkdir])
 	AC_SUBST([extdir])
+	AC_SUBST([sysconfigdir])
 	AC_SUBST([logdir])
 
 	# stuff the ABI versions into the pc file too
diff --git a/hw/xfree86/common/xf86Config.c b/hw/xfree86/common/xf86Config.c
index d02c22ac1..1e9543fa2 100644
--- a/hw/xfree86/common/xf86Config.c
+++ b/hw/xfree86/common/xf86Config.c
@@ -104,6 +104,9 @@ extern DeviceAssocRec mouse_assoc;
 #define USER_CONFIGDIRPATH	"/etc/X11/%R," "%C/X11/%R," \
 				"/etc/X11/%X," "%C/X11/%X"
 #endif
+#ifndef SYS_CONFIGDIRPATH
+#define SYS_CONFIGDIRPATH	"/usr/share/X11/%X," "%D/X11/%X"
+#endif
 #ifndef PROJECTROOT
 #define PROJECTROOT	"/usr/X11R6"
 #endif
@@ -2421,7 +2424,7 @@ checkInput(serverLayoutPtr layout, Bool implicit_layout) {
 ConfigStatus
 xf86HandleConfigFile(Bool autoconfig)
 {
-    const char *filename, *dirname;
+    const char *filename, *dirname, *sysdirname;
     char *filesearch, *dirsearch;
     MessageType filefrom = X_DEFAULT;
     MessageType dirfrom = X_DEFAULT;
@@ -2444,6 +2447,8 @@ xf86HandleConfigFile(Bool autoconfig)
 	    dirfrom = X_CMDLINE;
 
 	xf86initConfigFiles();
+	sysdirname = xf86openConfigDirFiles(SYS_CONFIGDIRPATH, NULL,
+					    PROJECTROOT);
 	dirname = xf86openConfigDirFiles(dirsearch, xf86ConfigDir, PROJECTROOT);
 	filename = xf86openConfigFile(filesearch, xf86ConfigFile, PROJECTROOT);
 	if (filename) {
@@ -2464,7 +2469,10 @@ xf86HandleConfigFile(Bool autoconfig)
 			"Unable to locate/open config directory: \"%s\"\n",
 			xf86ConfigDir);
 	}
-	if (!filename && !dirname)
+	if (sysdirname)
+	    xf86MsgVerb(X_DEFAULT, 0, "Using system config directory \"%s\"\n",
+			sysdirname);
+	if (!filename && !dirname && !sysdirname)
 	    return CONFIG_NOFILE;
     }
 
diff --git a/hw/xfree86/doc/man/xorg.conf.man.pre b/hw/xfree86/doc/man/xorg.conf.man.pre
index acfa1caa6..4782d61ba 100644
--- a/hw/xfree86/doc/man/xorg.conf.man.pre
+++ b/hw/xfree86/doc/man/xorg.conf.man.pre
@@ -138,6 +138,18 @@ is the path specified with the
 .B \-configdir
 command line option (which may be absolute or relative).
 .PP
+Finally, configuration files will also be searched for in directories
+reserved for system use. These are to separate configuration files from
+the vendor or 3rd party packages from those of local administration.
+These files are found in the following directories:
+.PP
+.RS 4
+.nf
+.I /usr/share/X11/__xconfigdir__
+.I __datadir__/X11/__xconfigdir__
+.fi
+.RE
+.PP
 The
 .I __xconfigfile__
 and
diff --git a/xorg-server.pc.in b/xorg-server.pc.in
index 3d58dabbf..376cb933d 100644
--- a/xorg-server.pc.in
+++ b/xorg-server.pc.in
@@ -2,8 +2,10 @@ prefix=@prefix@
 exec_prefix=@exec_prefix@
 libdir=@libdir@
 includedir=@includedir@
+datarootdir=@datarootdir@
 moduledir=@moduledir@
 sdkdir=@sdkdir@
+sysconfigdir=@sysconfigdir@
 
 abi_ansic=@abi_ansic@
 abi_videodrv=@abi_videodrv@