kbd: update search-paths.patch

Backport of 6f89feaeddacab8ad30909dae968bba5b9a066e7

pkgs/os-specific/linux/kbd/default.nix

@@ -29,6 +29,10 @@ stdenv.mkDerivation rec {
     "--disable-nls"
   ];
 
+  patches = [
+    ./search-paths.patch
+  ];
+
   postPatch =
     ''
       # Renaming keymaps with name clashes, because loadkeys just picks

pkgs/os-specific/linux/kbd/search-paths.patch

@@ -0,0 +1,85 @@
+Add /etc/kbd to the list of directories to search for the console
+fonts, screen mappings, Unicode maps, keytable files, etc.
+
+Without this patch, kbd will only look inside
+/nix/store/<hash>-kbd-x.x.x/share.
+
+--- a/src/libkeymap/analyze.l
++++ b/src/libkeymap/analyze.l
+@@ -109,6 +109,9 @@ static const char *const include_dirpath1[] = {
+ 	NULL
+ };
+ static const char *const include_dirpath3[] = {
++	"/etc/kbd/" KEYMAPDIR "/include/",
++	"/etc/kbd/" KEYMAPDIR "/i386/include/",
++	"/etc/kbd/" KEYMAPDIR "/mac/include/",
+ 	DATADIR "/" KEYMAPDIR "/include/",
+ 	DATADIR "/" KEYMAPDIR "/i386/include/",
+ 	DATADIR "/" KEYMAPDIR "/mac/include/",
+--- a/src/libkfont/context.c
++++ b/src/libkfont/context.c
+@@ -13,6 +13,7 @@
+ /* search for the map file in these directories (with trailing /) */
+ static const char *const mapdirpath[]  = {
+ 	"",
++	"/etc/kbd/" TRANSDIR "/",
+ 	DATADIR "/" TRANSDIR "/",
+ 	NULL
+ };
+@@ -28,6 +29,7 @@ static const char *const mapsuffixes[] = {
+ /* search for the font in these directories (with trailing /) */
+ static const char *const fontdirpath[]  = {
+ 	"",
++	"/etc/kbd/" FONTDIR "/",
+ 	DATADIR "/" FONTDIR "/",
+ 	NULL
+ };
+@@ -42,6 +44,7 @@ static char const *const fontsuffixes[] = {
+ 
+ static const char *const unidirpath[]  = {
+ 	"",
++	"/etc/kbd/" UNIMAPDIR "/",
+ 	DATADIR "/" UNIMAPDIR "/",
+ 	NULL
+ };
+@@ -55,6 +58,7 @@ static const char *const unisuffixes[] = {
+ /* hide partial fonts a bit - loading a single one is a bad idea */
+ const char *const partfontdirpath[]  = {
+ 	"",
++	"/etc/kbd/" FONTDIR "/" PARTIALDIR "/",
+ 	DATADIR "/" FONTDIR "/" PARTIALDIR "/",
+ 	NULL
+ };
+--- a/src/loadkeys.c
++++ b/src/loadkeys.c
+@@ -27,6 +27,7 @@
+ 
+ static const char *const dirpath1[] = {
+ 	"",
++	"/etc/kbd/" KEYMAPDIR "/**",
+ 	DATADIR "/" KEYMAPDIR "/**",
+ 	KERNDIR "/",
+ 	NULL
+--- a/src/resizecons.c
++++ b/src/resizecons.c
+@@ -104,6 +104,7 @@ static void vga_set_verticaldisplayend_lowbyte(int);
+ 
+ const char *const dirpath[]  = {
+ 	"",
++	"/etc/kbd/" VIDEOMODEDIR "/",
+ 	DATADIR "/" VIDEOMODEDIR "/",
+ 	NULL
+ };
+--- a/src/setfont.c
++++ b/src/setfont.c
+@@ -48,8 +48,8 @@ usage(void)
+ 	                    "    -v         Be verbose.\n"
+ 	                    "    -C <cons>  Indicate console device to be used.\n"
+ 	                    "    -V         Print version and exit.\n"
+-	                    "Files are loaded from the current directory or %s/*/.\n"),
+-	        DATADIR);
++	                    "Files are loaded from the current directory or %s/*/ or %s/*/.\n"),
++	        DATADIR, "/etc/kbd");
+ 	exit(EX_USAGE);
+ }
+