This file is indexed.

/usr/share/X11/xkb/keycodes/xfree86 is in xkb-data 2.10.1-1ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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// "standard" XFree86 codes
// It seems that the "default" must be the first entry in the file.

default xkb_keycodes "xfree86" {
    include "xfree86(basic)"
    <BKSL> =  51;
    alias <AC12> = <BKSL>;
    <LSGT> =  94;
};

xkb_keycodes "basic" {

    minimum= 8;
    maximum= 255;

    <TLDE> =  49;
    alias <AE00> = <TLDE>;	// Some geometries use AE00
    <AE01> =  10;
    <AE02> =  11;
    <AE03> =  12;
    <AE04> =  13;
    <AE05> =  14;
    <AE06> =  15;
    <AE07> =  16;
    <AE08> =  17;
    <AE09> =  18;
    <AE10> =  19;
    <AE11> =  20;
    <AE12> =  21;
    <BKSP> =  22;

    <TAB>  =  23;
    <AD01> =  24;
    <AD02> =  25;
    <AD03> =  26;
    <AD04> =  27;
    <AD05> =  28;
    <AD06> =  29;
    <AD07> =  30;
    <AD08> =  31;
    <AD09> =  32;
    <AD10> =  33;
    <AD11> =  34;
    <AD12> =  35;
    <RTRN> =  36;

    <CAPS> =  66;
    <AC01> =  38;
    <AC02> =  39;
    <AC03> =  40;
    <AC04> =  41;
    <AC05> =  42;
    <AC06> =  43;
    <AC07> =  44;
    <AC08> =  45;
    <AC09> =  46;
    <AC10> =  47;
    <AC11> =  48;

    <LFSH> =  50;
    <AB01> =  52;
    <AB02> =  53;
    <AB03> =  54;
    <AB04> =  55;
    <AB05> =  56;
    <AB06> =  57;
    <AB07> =  58;
    <AB08> =  59;
    <AB09> =  60;
    <AB10> =  61;
    <RTSH> =  62;

    <LALT> =  64;
    <LCTL> =  37;
    <SPCE> =  65;
    <RCTL> = 109;
    <RALT> = 113;
    // Microsoft keyboard extra keys
    <LWIN> = 115;
    <RWIN> = 116;
    <MENU> = 117;

    <ESC>  =   9;
    <FK01> =  67;
    <FK02> =  68;
    <FK03> =  69;
    <FK04> =  70;
    <FK05> =  71;
    <FK06> =  72;
    <FK07> =  73;
    <FK08> =  74;
    <FK09> =  75;
    <FK10> =  76;
    <FK11> =  95;
    <FK12> =  96;

    <PRSC> = 111;
    <SYRQ> =  92;
    <SCLK> =  78;
    <PAUS> = 110;
    <BRK>  = 114;

    <INS>  = 106;
    <HOME> =  97;
    <PGUP> =  99;
    <DELE> = 107;
    <END>  = 103;
    <PGDN> = 105;

    <UP>   =  98;
    <LEFT> = 100;
    <DOWN> = 104;
    <RGHT> = 102;

    <NMLK> =  77;
    <KPDV> = 112;
    <KPMU> =  63;
    <KPSU> =  82;

    <KP7>  =  79;
    <KP8>  =  80;
    <KP9>  =  81;
    <KPAD> =  86;

    <KP4>  =  83;
    <KP5>  =  84;
    <KP6>  =  85;

    <KP1>  =  87;
    <KP2>  =  88;
    <KP3>  =  89;
    <KPEN> = 108;

    <KP0>  =  90;
    <KPDL> =  91;
    <KPEQ> = 126;

    <FK13> =  118;
    <FK14> =  119;
    <FK15> =  120;
    <FK16> =  121;
    <FK17> =  122;
    <KPDC> =  123;

    // Keys that are generated on Japanese keyboards

    alias <HZTG> = <TLDE>;	// Hankaku_Zenkaku toggle
    <HKTG> =   208;		// Hiragana_Katakana toggle
    <AB11> =   211;		// backslash/underscore
    <XFER> =   129;		// Henkan
    <NFER> =   131;		// Muhenkan
    <AE13> =   133;		// Yen
    <EISU> =   210;		// Alphanumeric mode on macintosh
    <KANA> =   209;		// Kana mode on macintosh

    // Keys that are generated on Korean keyboards

    alias <HNGL> = <FK16>;     // Hangul Latin toggle
    alias <HJCV> = <FK17>;     // Hangul to Hanja conversion

    // Extended keys that may be generated on "Internet" keyboards.
    // These are not standardised, hence the meaningless names.
    // The entries commented out are never generated because the raw codes
    // in those positions are already used for well-defined keys.

    alias <I01> = <XFER>;
    <I02> =   130;
    alias <I03> = <NFER>;
    <I04> =   132;
    alias <I05> = <AE13>;
    <I06> =   134;
    <I07> =   135;
    <I08> =   136;
    <I09> =   137;
    <I0A> =   138;
    <I0B> =   139;
    <I0C> =   140;
    <I0D> =   141;
    <I0E> =   142;
    <I0F> =   143;
    <I10> =   144;
    <I11> =   145;
    <I12> =   146;
    <I13> =   147;
    <I14> =   148;
    <I15> =   149;
    <I16> =   150;
    <I17> =   151;
    <I18> =   152;
    <I19> =   153;
    <I1A> =   154;
    <I1B> =   155;
    // <I1C> =   156;	<META>
    // <I1D> =   157;	<K59>
    <I1E> =   158;
    <I1F> =   159;
    <I20> =   160;
    <I21> =   161;
    <I22> =   162;
    <I23> =   163;
    <I24> =   164;
    <I25> =   165;
    <I26> =   166;
    <I27> =   167;
    <I28> =   168;
    <I29> =   169;
    // <I2A> =   170;	<K5A>
    <I2B> =   171;
    <I2C> =   172;
    <I2D> =   173;
    <I2E> =   174;
    <I2F> =   175;
    <I30> =   176;
    <I31> =   177;
    <I32> =   178;
    <I33> =   179;
    <I34> =   180;
    // <I35> =   181;	<K5B>
    // <I36> =   182;	<K5D>
    // <I37> =   183;	<K5E>
    // <I38> =   184;	<K5F>
    <I39> =   185;
    <I3A> =   186;
    <I3B> =   187;
    <I3C> =   188;
    // <I3D> =   189;	<K62>
    // <I3E> =   190;	<K63>
    // <I3F> =   191;	<K64>
    // <I40> =   192;	<K65>
    // <I41> =   193;	<K66>
    <I42> =   194;
    <I43> =   195;
    <I44> =   196;
    <I45> =   197;
    // <I46> =   198;	<K67>
    // <I47> =   199;	<K68>
    // <I48> =   200;	<K69>
    // <I49> =   201;	<K6A>
    <I4A> =   202;
    // <I4B> =   203;	<K6B>
    // <I4C> =   204;	<K6C>
    // <I4D> =   205;	<K6D>
    // <I4E> =   206;	<K6E>
    // <I4F> =   207;	<K6F>
    // <I50> =   208;	<K70>
    // <I51> =   209;	<K71>
    // <I52> =   210;	<K72>
    // <I53> =   211;	<K73>
    <I54> =   212;
    <I55> =   213;
    <I56> =   214;
    <I57> =   215;
    <I58> =   216;
    <I59> =   217;
    <I5A> =   218;
    // <I5B> =   219;	<K74>
    // <I5C> =   220;	<K75>
    // <I5D> =   221;	<K76>
    <I5E> =   222;
    <I5F> =   223;
    <I60> =   224;
    <I61> =   225;
    <I62> =   226;
    <I63> =   227;
    <I64> =   228;
    <I65> =   229;
    <I66> =   230;
    <I67> =   231;
    <I68> =   232;
    <I69> =   233;
    <I6A> =   234;
    <I6B> =   235;
    <I6C> =   236;
    <I6D> =   237;
    <I6E> =   238;
    <I6F> =   239;
    <I70> =   240;
    <I71> =   241;
    <I72> =   242;
    <I73> =   243;
    <I74> =   244;
    <I75> =   245;
    <I76> =   246;
    <I77> =   247;
    <I78> =   248;
    <I79> =   249;
    <I7A> =   250;
    <I7B> =   251;
    <I7C> =   252;
    <I7D> =   253;
    <I7E> =   254;
    <I7F> =   255;

    // MacBooks generate 0x65 for the lower brightness key
    <II65> =  101;

    // Required for apple/logitech_g15 keyboard
    <II5D> = 93;

    // Codes generated for scancodes 0x59-0x5f, 0x62-0x76
    <K59> =   157;		// <I1D>
    <K5A> =   170;		// <I2A>
    <K5B> =   181;		// <I35>
    alias <K5C> = <KPEQ>;
    <K5D> =   182;		// <I36>
    <K5E> =   183;		// <I37>
    <K5F> =   184;		// <I38>
    <K62> =   189;		// <I3D>
    <K63> =   190;		// <I3E>
    <K64> =   191;		// <I3F>
    <K65> =   192;		// <I40>
    <K66> =   193;		// <I41>
    <K67> =   198;		// <I46>
    <K68> =   199;		// <I47>
    <K69> =   200;		// <I48>
    <K6A> =   201;		// <I49>
    <K6B> =   203;		// <I4B>
    <K6C> =   204;		// <I4C>
    <K6D> =   205;		// <I4D>
    <K6E> =   206;		// <I4E>
    <K6F> =   207;		// <I4F>
    alias <K70> = <HKTG>;	// <I50>
    alias <K71> = <KANA>;	// <I51>
    alias <K72> = <EISU>;	// <I52>
    alias <K73> = <AB11>;	// <I53>
    <K74> =   219;		// <I5B>
    <K75> =   220;		// <I5C>
    <K76> =   221;		// <I5D>
   
    // Solaris compatibility

    alias <LMTA> = <LWIN>;
    alias <RMTA> = <RWIN>;
    alias <COMP> = <MENU>;
    alias <POWR> = <I0C>;
    alias <MUTE> = <I0D>;
    alias <VOL-> = <I0E>;
    alias <VOL+> = <I0F>;
    alias <HELP> = <I10>;
    alias <STOP> = <I11>;
    alias <AGAI> = <I12>;
    alias <PROP> = <I13>;
    alias <UNDO> = <I14>;
    alias <FRNT> = <I15>;
    alias <COPY> = <I16>;
    alias <OPEN> = <I17>;
    alias <PAST> = <I18>;
    alias <FIND> = <I19>;
    alias <CUT>  = <I1A>;
    alias <OUTP> = <I56>;
    alias <KITG> = <I57>;
    alias <KIDN> = <I58>;
    alias <KIUP> = <I59>;

    // Other codes never generated.  The XFree86 ddx never generates
    // these codes.
    // Thus we can use them as fake keys
    <MDSW> =     8;
    <LVL3> =   124; // <U7C>
    <ALT>  =   125; // <U7D>
    <META> =   156; // <I1C>
    <SUPR> =   127; // <U7F>
    <HYPR> =   128; // <U80>

    indicator 1 = "Caps Lock";
    indicator 2 = "Num Lock";
    indicator 3 = "Scroll Lock";

    alias <ALGR> = <RALT>;

    // For Brazilian ABNT2
    alias <KPPT> = <I06>;
};

// What keyboard is this?

xkb_keycodes "102" {
    include "xfree86(xfree86)"

    // There will be warnings from xkbcomp because of multiple definitions.

    <RALT> = 122;
    <RCTL> = 123;

    <PRSC> = 121;
    <PAUS> = 118;

    <INS>  = 131;
    <HOME> = 135;
    <PGUP> = 119;
    <DELE> = 129;
    <END>  = 130;
    <PGDN> = 134;

    <UP>   = 128;
    <LEFT> = 132;
    <DOWN> = 120;
    <RGHT> = 133;

    <KPDV> = 125;

    <KPEN> = 124;
};


// IBM ThinkPad Z60m/Z60t/Z61m/Z61t
xkb_keycodes "thinkpadz60" {
    include "xfree86(xfree86)"
    <MENU> = 227;
};