xfree86: add new key MatchSeat to xorg.conf sections "Device", "Screen", and "ServerLayout"

This patch introduces a new key MatchSeat in xorg.conf (also applies to
any .conf file in xorg.conf.d). It will allow targeting a given
"Device", "Screen", and/or "ServerLayout" section to a particular
seat only (specified by option "-seat" in X server command line),
so that other seats won't be affected.

Without this patch, one needs to write a separate xorg.conf.custom
file and pass it to X server via "-config" option, if one wants that
these settings only apply for the right seat. However, in some cases,
this solution is undesirable or even impossible (e.g. when using GDM,
which doesn't allow X server command line customization).

Example file (/etc/X11/xorg.conf.d/seat1.conf), which would be ignored
by X server unless it was started with "-seat seat1" option:

Section "Device"
    Identifier "card0"
    Driver "nvidia"
    Option "NoLogo" "True"
    MatchSeat "seat1"
EndSection

Signed-off-by: Oleg Samarin <osamarin68@gmail.com>
Signed-off-by: Laércio de Sousa <lbsousajr@gmail.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

5 files changed, 22 insertions, 0 deletions

diff --git a/hw/xfree86/parser/Device.c b/hw/xfree86/parser/Device.c
index 073171f22..d3ac29351 100644
--- a/hw/xfree86/parser/Device.c
+++ b/hw/xfree86/parser/Device.c
@@ -71,6 +71,7 @@ xf86ConfigSymTabRec DeviceTab[] = {
     {RAMDAC, "ramdac"},
     {DACSPEED, "dacspeed"},
     {CLOCKS, "clocks"},
+    {MATCHSEAT, "matchseat"},
     {OPTION, "option"},
     {VIDEORAM, "videoram"},
     {BIOSBASE, "biosbase"},
@@ -216,6 +217,11 @@ xf86parseDeviceSection(void)
                 Error(NUMBER_MSG, "TextClockFreq");
             ptr->dev_textclockfreq = (int) (xf86_lex_val.realnum * 1000.0 + 0.5);
             break;
+        case MATCHSEAT:
+            if (xf86getSubToken(&(ptr->dev_comment)) != STRING)
+                Error(QUOTE_MSG, "MatchSeat");
+            ptr->match_seat = xf86_lex_val.str;
+            break;
         case OPTION:
             ptr->dev_option_lst = xf86parseOption(ptr->dev_option_lst);
             break;
diff --git a/hw/xfree86/parser/Layout.c b/hw/xfree86/parser/Layout.c
index 7be746f04..994b31ae4 100644
--- a/hw/xfree86/parser/Layout.c
+++ b/hw/xfree86/parser/Layout.c
@@ -70,6 +70,7 @@ static xf86ConfigSymTabRec LayoutTab[] = {
     {ENDSECTION, "endsection"},
     {SCREEN, "screen"},
     {IDENTIFIER, "identifier"},
+    {MATCHSEAT, "matchseat"},
     {INACTIVE, "inactive"},
     {INPUTDEVICE, "inputdevice"},
     {OPTION, "option"},
@@ -109,6 +110,11 @@ xf86parseLayoutSection(void)
             ptr->lay_identifier = xf86_lex_val.str;
             has_ident = TRUE;
             break;
+        case MATCHSEAT:
+            if (xf86getSubToken(&(ptr->lay_comment)) != STRING)
+                Error(QUOTE_MSG, "MatchSeat");
+            ptr->match_seat = xf86_lex_val.str;
+            break;
         case INACTIVE:
         {
             XF86ConfInactivePtr iptr;
diff --git a/hw/xfree86/parser/Screen.c b/hw/xfree86/parser/Screen.c
index fecd57c0c..0e9746ae5 100644
--- a/hw/xfree86/parser/Screen.c
+++ b/hw/xfree86/parser/Screen.c
@@ -198,6 +198,7 @@ xf86parseDisplaySubSection(void)
 static xf86ConfigSymTabRec ScreenTab[] = {
     {ENDSECTION, "endsection"},
     {IDENTIFIER, "identifier"},
+    {MATCHSEAT, "matchseat"},
     {OBSDRIVER, "driver"},
     {MDEVICE, "device"},
     {MONITOR, "monitor"},
@@ -236,6 +237,11 @@ xf86parseScreenSection(void)
                 Error(ONLY_ONE_MSG, "Identifier or Driver");
             has_ident = TRUE;
             break;
+        case MATCHSEAT:
+            if (xf86getSubToken(&(ptr->scrn_comment)) != STRING)
+                Error(QUOTE_MSG, "MatchSeat");
+            ptr->match_seat = xf86_lex_val.str;
+            break;
         case OBSDRIVER:
             if (xf86getSubToken(&(ptr->scrn_comment)) != STRING)
                 Error(QUOTE_MSG, "Driver");
diff --git a/hw/xfree86/parser/xf86Parser.h b/hw/xfree86/parser/xf86Parser.h
index 8f855ac09..c95423a1f 100644
--- a/hw/xfree86/parser/xf86Parser.h
+++ b/hw/xfree86/parser/xf86Parser.h
@@ -224,6 +224,7 @@ typedef struct {
     int dev_screen;
     XF86OptionPtr dev_option_lst;
     char *dev_comment;
+    char *match_seat;
 } XF86ConfDeviceRec, *XF86ConfDevicePtr;
 
 typedef struct {
@@ -275,6 +276,7 @@ typedef struct {
     XF86OptionPtr scrn_option_lst;
     char *scrn_comment;
     int scrn_virtualX, scrn_virtualY;
+    char *match_seat;
 } XF86ConfScreenRec, *XF86ConfScreenPtr;
 
 typedef struct {
@@ -366,6 +368,7 @@ typedef struct {
     XF86ConfInactivePtr lay_inactive_lst;
     XF86ConfInputrefPtr lay_input_lst;
     XF86OptionPtr lay_option_lst;
+    char *match_seat;
     char *lay_comment;
 } XF86ConfLayoutRec, *XF86ConfLayoutPtr;
 
diff --git a/hw/xfree86/parser/xf86tokens.h b/hw/xfree86/parser/xf86tokens.h
index f751b7b0e..5c01ce701 100644
--- a/hw/xfree86/parser/xf86tokens.h
+++ b/hw/xfree86/parser/xf86tokens.h
@@ -87,6 +87,7 @@ typedef enum {
     VENDOR,
     DASH,
     COMMA,
+    MATCHSEAT,
     OPTION,
     COMMENT,