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// fluxbox-update_configs.cc
// Copyright (c) 2007 Fluxbox Team (fluxgen at fluxbox dot org)
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

#include "../src/FbTk/I18n.hh"
#include "../src/FbTk/Resource.hh"
#include "../src/FbTk/StringUtil.hh"
#include "../src/FbTk/FileUtil.hh"

#include "../src/defaults.hh"

#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif // HAVE_SIGNAL_H

#ifdef HAVE_CSTRING
  #include <cstring>
#else
  #include <string.h>
#endif

#include <sys/stat.h>

#include <iostream>
#include <fstream>
#include <set>
#include <map>
#include <cstdlib>
#include <list>

using std::cout;
using std::cerr;
using std::endl;
using std::string;
using std::ifstream;
using std::ofstream;
using std::set;
using std::map;
using std::list;
using std::exit;
using std::getenv;

string read_file(const string& filename);
void write_file(const string& filename, const string &contents);
void save_all_files();


/*------------------------------------------------------------------*\
\*------------------------------------------------------------------*/

void update_add_mouse_evens_to_keys(FbTk::ResourceManager& rm, 
        const FbTk::FbString& keyfilename, const FbTk::FbString& appsfilename) {

    string whole_keyfile = read_file(keyfilename);
    string new_keyfile = "";
    // let's put our new keybindings first, so they're easy to find
    new_keyfile += "!mouse actions added by fluxbox-update_configs\n";
    new_keyfile += "OnDesktop Mouse1 :HideMenus\n";
    new_keyfile += "OnDesktop Mouse2 :WorkspaceMenu\n";
    new_keyfile += "OnDesktop Mouse3 :RootMenu\n";

    // scrolling on desktop needs to match user's desktop wheeling settings
    // hmmm, what are the odds that somebody wants this to be different on
    // different screens? the ability is going away until we make per-screen
    // keys files, anyway, so let's just use the first screen's setting
    FbTk::Resource<bool> rc_wheeling(rm, true,
            "session.screen0.desktopwheeling",
            "Session.Screen0.DesktopWheeling");
    FbTk::Resource<bool> rc_reverse(rm, false,
            "session.screen0.reversewheeling",
            "Session.Screen0.ReverseWheeling");
    if (*rc_wheeling) {
        if (*rc_reverse) { // if you ask me, this should have been default
            new_keyfile += "OnDesktop Mouse4 :PrevWorkspace\n";
            new_keyfile += "OnDesktop Mouse5 :NextWorkspace\n";
        } else {
            new_keyfile += "OnDesktop Mouse4 :NextWorkspace\n";
            new_keyfile += "OnDesktop Mouse5 :PrevWorkspace\n";
        }
    }
    new_keyfile += "\n"; // just for good looks
    new_keyfile += whole_keyfile; // don't forget user's old keybindings

    write_file(keyfilename, new_keyfile);
}


void update_move_groups_entries_to_apps_file(FbTk::ResourceManager& rm,
        const FbTk::FbString& keyfilename, const FbTk::FbString& appsfilename) {

    FbTk::Resource<string> rc_groupfile(rm, "~/.fluxbox/groups",
            "session.groupFile", "Session.GroupFile");
    string groupfilename = FbTk::StringUtil::expandFilename(*rc_groupfile);
    string whole_groupfile = read_file(groupfilename);
    string whole_appsfile = read_file(appsfilename);
    string new_appsfile = "";

    list<string> lines;
    FbTk::StringUtil::stringtok(lines, whole_groupfile, "\n");

    list<string>::iterator line_it = lines.begin();
    list<string>::iterator line_it_end = lines.end();
    for (; line_it != line_it_end; ++line_it) {
        new_appsfile += "[group] (workspace=[current])\n";

        list<string> apps;
        FbTk::StringUtil::stringtok(apps, *line_it);

        list<string>::iterator it = apps.begin();
        list<string>::iterator it_end = apps.end();
        for (; it != it_end; ++it) {
            new_appsfile += " [app] (name=";
            new_appsfile += *it;
            new_appsfile += ")\n";
        }

        new_appsfile += "[end]\n";
    }

    new_appsfile += whole_appsfile;
    write_file(appsfilename, new_appsfile);
}


void update_move_toolbar_wheeling_to_keys_file(FbTk::ResourceManager& rm,
        const FbTk::FbString& keyfilename, const FbTk::FbString& appsfilename) {

    string whole_keyfile = read_file(keyfilename);
    string new_keyfile = "";
    // let's put our new keybindings first, so they're easy to find
    new_keyfile += "!mouse actions added by fluxbox-update_configs\n";
    bool keep_changes = false;

    // scrolling on toolbar needs to match user's toolbar wheeling settings
    FbTk::Resource<string> rc_wheeling(rm, "Off",
            "session.screen0.iconbar.wheelMode",
            "Session.Screen0.Iconbar.WheelMode");
    FbTk::Resource<bool> rc_screen(rm, true,
            "session.screen0.desktopwheeling",
            "Session.Screen0.DesktopWheeling");
    FbTk::Resource<bool> rc_reverse(rm, false,
            "session.screen0.reversewheeling",
            "Session.Screen0.ReverseWheeling");
    if (strcasecmp((*rc_wheeling).c_str(), "On") == 0 ||
            (strcasecmp((*rc_wheeling).c_str(), "Screen") == 0 && *rc_screen)) {
        keep_changes = true;
        if (*rc_reverse) { // if you ask me, this should have been default
            new_keyfile += "OnToolbar Mouse4 :PrevWorkspace\n";
            new_keyfile += "OnToolbar Mouse5 :NextWorkspace\n";
        } else {
            new_keyfile += "OnToolbar Mouse4 :NextWorkspace\n";
            new_keyfile += "OnToolbar Mouse5 :PrevWorkspace\n";
        }
    }
    new_keyfile += "\n"; // just for good looks
    new_keyfile += whole_keyfile; // don't forget user's old keybindings

    if (keep_changes)
        write_file(keyfilename, new_keyfile);
}



void update_move_modkey_to_keys_file(FbTk::ResourceManager& rm,
        const FbTk::FbString& keyfilename, const FbTk::FbString& appsfilename) {
    string whole_keyfile = read_file(keyfilename);
    string new_keyfile = "";
    // let's put our new keybindings first, so they're easy to find
    new_keyfile += "!mouse actions added by fluxbox-update_configs\n";

    // need to match user's resize model
    FbTk::Resource<string> rc_mode(rm, "Bottom",
            "session.screen0.resizeMode",
            "Session.Screen0.ResizeMode");
    FbTk::Resource<string> rc_modkey(rm, "Mod1",
            "session.modKey",
            "Session.ModKey");

    new_keyfile += "OnWindow " + *rc_modkey +
        " Mouse1 :MacroCmd {Raise} {Focus} {StartMoving}\n";
    new_keyfile += "OnWindow " + *rc_modkey +
        " Mouse3 :MacroCmd {Raise} {Focus} {StartResizing ";
    if (strcasecmp((*rc_mode).c_str(), "Quadrant") == 0) {
        new_keyfile += "NearestCorner}\n";
    } else if (strcasecmp((*rc_mode).c_str(), "Center") == 0) {
        new_keyfile += "Center}\n";
    } else {
        new_keyfile += "BottomRight}\n";
    }
    new_keyfile += "\n"; // just for good looks
    new_keyfile += whole_keyfile; // don't forget user's old keybindings

    write_file(keyfilename, new_keyfile);
}




void update_window_patterns_for_iconbar(FbTk::ResourceManager& rm,
        const FbTk::FbString& keyfilename, const FbTk::FbString& appsfilename) {

    // this needs to survive after going out of scope
    // it won't get freed, but that's ok
    FbTk::Resource<string> *rc_mode =
        new FbTk::Resource<string>(rm, "Workspace",
                                   "session.screen0.iconbar.mode",
                                   "Session.Screen0.Iconbar.Mode");

    std::string mode = FbTk::StringUtil::toLower(**rc_mode);
    if (mode == "none")
        *rc_mode = "none";
    else if (mode == "icons")
        *rc_mode = "{static groups} (minimized=yes)";
    else if (mode == "noicons")
        *rc_mode = "{static groups} (minimized=no)";
    else if (mode == "workspaceicons")
        *rc_mode = "{static groups} (minimized=yes) (workspace)";
    else if (mode == "workspacenoicons")
        *rc_mode = "{static groups} (minimized=no) (workspace)";
    else if (mode == "allwindows")
        *rc_mode = "{static groups}";
    else
        *rc_mode = "{static groups} (workspace)";

}


void update_move_titlebar_actions_to_keys_file(FbTk::ResourceManager& rm,
        const FbTk::FbString& keyfilename, const FbTk::FbString& appsfilename) {
    string whole_keyfile = read_file(keyfilename);
    string new_keyfile = "";
    // let's put our new keybindings first, so they're easy to find
    new_keyfile += "!mouse actions added by fluxbox-update_configs\n";
    new_keyfile += "OnTitlebar Double Mouse1 :Shade\n";
    new_keyfile += "OnTitlebar Mouse3 :WindowMenu\n";

    FbTk::Resource<bool> rc_reverse(rm, false,"session.screen0.reversewheeling", "Session.Screen0.ReverseWheeling");
    FbTk::Resource<std::string>  scroll_action(rm, "", "session.screen0.windowScrollAction", "Session.Screen0.WindowScrollAction");
    if (strcasecmp((*scroll_action).c_str(), "shade") == 0) {
        if (*rc_reverse) {
            new_keyfile += "OnTitlebar Mouse5 :ShadeOn\n";
            new_keyfile += "OnTitlebar Mouse4 :ShadeOff\n";
        } else {
            new_keyfile += "OnTitlebar Mouse4 :ShadeOn\n";
            new_keyfile += "OnTitlebar Mouse5 :ShadeOff\n";
        }
    } else if (strcasecmp((*scroll_action).c_str(), "nexttab") == 0) {
        if (*rc_reverse) {
            new_keyfile += "OnTitlebar Mouse5 :PrevTab\n";
            new_keyfile += "OnTitlebar Mouse4 :NextTab\n";
        } else {
            new_keyfile += "OnTitlebar Mouse4 :PrevTab\n";
            new_keyfile += "OnTitlebar Mouse5 :NextTab\n";
        }
    }

    new_keyfile += "\n"; // just for good looks
    new_keyfile += whole_keyfile; // don't forget user's old keybindings

    write_file(keyfilename, new_keyfile);

}


void update_added_starttabbing_command(FbTk::ResourceManager& rm,
        const FbTk::FbString& keyfilename, const FbTk::FbString& appsfilename) {
    string whole_keyfile = read_file(keyfilename);
    string new_keyfile = "";
    // let's put our new keybindings first, so they're easy to find
    new_keyfile += "!mouse actions added by fluxbox-update_configs\n";
    new_keyfile += "OnTitlebar Mouse2 :StartTabbing\n\n";
    new_keyfile += whole_keyfile; // don't forget user's old keybindings

    write_file(keyfilename, new_keyfile);
}



void update_disable_icons_in_tabs_for_backwards_compatibility(FbTk::ResourceManager& rm,
        const FbTk::FbString& keyfilename, const FbTk::FbString& appsfilename) {

    FbTk::Resource<bool> *show =
        new FbTk::Resource<bool>(rm, false,
                "session.screen0.tabs.usePixmap",
                "Session.Screen0.Tabs.UsePixmap");
    if (!*show) // only change if the setting didn't already exist
        *show = false;
}




void update_change_format_of_split_placement_menu(FbTk::ResourceManager& rm,
        const FbTk::FbString& keyfilename, const FbTk::FbString& appsfilename) {

    FbTk::Resource<string> *placement =
        new FbTk::Resource<string>(rm, "BottomRight",
                "session.screen0.slit.placement",
                "Session.Screen0.Slit.Placement");

    FbTk::Resource<string> *direction =
        new FbTk::Resource<string>(rm, "Vertical",
                "session.screen0.slit.direction",
                "Session.Screen0.Slit.Direction");

    if (strcasecmp((**direction).c_str(), "vertical") == 0) {
        if (strcasecmp((**placement).c_str(), "BottomRight") == 0)
            *placement = "RightBottom";
        else if (strcasecmp((**placement).c_str(), "BottomLeft") == 0)
            *placement = "LeftBottom";
        else if (strcasecmp((**placement).c_str(), "TopRight") == 0)
            *placement = "RightTop";
        else if (strcasecmp((**placement).c_str(), "TopLeft") == 0)
            *placement = "LeftTop";
    }
}




void update_update_keys_file_for_nextwindow_syntax_changes(FbTk::ResourceManager& rm,
        const FbTk::FbString& keyfilename, const FbTk::FbString& appsfilename) {

    string whole_keyfile = read_file(keyfilename);

    size_t pos = 0;
    while (true) {
        const char *keyfile = whole_keyfile.c_str();
        const char *loc = 0;
        size_t old_pos = pos;
        // find the first position that matches any of next/prevwindow/group
        if ((loc = FbTk::StringUtil::strcasestr(keyfile + old_pos,
                        "nextwindow")))
            pos = (loc - keyfile) + 10;
        if ((loc = FbTk::StringUtil::strcasestr(keyfile + old_pos,
                        "prevwindow")))
            pos = (pos > old_pos && keyfile + pos < loc) ?
                pos : (loc - keyfile) + 10;
        if ((loc = FbTk::StringUtil::strcasestr(keyfile + old_pos,
                        "nextgroup")))
            pos = (pos > old_pos && keyfile + pos < loc) ?
                pos : (loc - keyfile) + 9;
        if ((loc = FbTk::StringUtil::strcasestr(keyfile + old_pos,
                        "prevgroup")))
            pos = (pos > old_pos && keyfile + pos < loc) ?
                pos : (loc - keyfile) + 9;
        if (pos == old_pos)
            break;

        pos = whole_keyfile.find_first_not_of(" \t", pos);
        if (pos != std::string::npos && isdigit(whole_keyfile[pos])) {
            char *endptr = 0;
            unsigned int mask = strtoul(keyfile + pos, &endptr, 0);
            string insert = "";
            if ((mask & 9) == 9)
                insert = "{static groups}";
            else if (mask & 1)
                insert = "{groups}";
            else if (mask & 8)
                insert = "{static}";
            if (mask & 2)
                insert += " (stuck=no)";
            if (mask & 4)
                insert += " (shaded=no)";
            if (mask & 16)
                insert += " (minimized=no)";
            if (mask)
                whole_keyfile.replace(pos, endptr - keyfile - pos, insert);
        }
    }

    write_file(keyfilename, whole_keyfile);
}




void update_keys_for_ongrip_onwindowborder(FbTk::ResourceManager& rm,
        const FbTk::FbString& keyfilename, const FbTk::FbString& appsfilename) {

    string whole_keyfile = read_file(keyfilename);
    string new_keyfile = "";
    // let's put our new keybindings first, so they're easy to find
    new_keyfile += "!mouse actions added by fluxbox-update_configs\n";
    new_keyfile += "OnTitlebar Move1 :StartMoving\n";
    new_keyfile += "OnLeftGrip Move1 :StartResizing bottomleft\n";
    new_keyfile += "OnRightGrip Move1 :StartResizing bottomright\n";
    new_keyfile += "OnWindowBorder Move1 :StartMoving\n\n";
    new_keyfile += whole_keyfile; // don't forget user's old keybindings

    new_keyfile += "\n"; // just for good looks
    write_file(keyfilename, new_keyfile);
}




void update_keys_for_activetab(FbTk::ResourceManager& rm,
        const FbTk::FbString& keyfilename, const FbTk::FbString& appsfilename) {

    string whole_file = read_file(keyfilename);
    string new_keyfile = "";

    new_keyfile += "!mouse actions added by fluxbox-update_configs\n";
    new_keyfile += "OnTitlebar Mouse1 :MacroCmd {Focus} {Raise} {ActivateTab}\n";
    new_keyfile += whole_file;

    new_keyfile += "\n"; // just for good looks
    write_file(keyfilename, new_keyfile);

}



// NextWindow {static groups} => NextWindow {static groups} (workspace=[current])
void update_limit_nextwindow_to_current_workspace(FbTk::ResourceManager& rm,
        const FbTk::FbString& keyfilename, const FbTk::FbString& appsfilename) {

    string whole_file = read_file(keyfilename);
    string new_keyfile = "";

    new_keyfile += "! fluxbox-update_configs added '(workspace=[current])' to (Next|Prev)(Window|Group)\n";
    new_keyfile += "! check lines marked by 'FBCV13' if they are correctly updated\n";

    const char* pos = whole_file.c_str();


    string last_word;
    enum { SCAN, COMMENT, CMD, OPEN_STATIC_GROUP_OR_PATTERN, CLOSE_STATIC_GROUP };
    int state = SCAN;
    bool mark_line_change = false;
    for ( ; *pos; ++pos) {

        new_keyfile += *pos;

        char c = tolower(*pos);
        switch (state) {
        case SCAN:
            if (c == '{' || c == ':') // ':NextWindow' or 'MacroCmd {NextWindow'
                state = CMD;
            break;
        case CMD:
            if (isspace(c) || c == '}' || c == '#' || c == '!' ) {
                if (last_word == "nextwindow" || last_word == "nextgroup" ||
                        last_word == "prevwindow" || last_word == "prevgroup") {

                    // ':NewWindow[\n!#]' or 'MacroCmd {NextWindow}'
                    if (c == '\n' || c == '#' || c == '!' || c == '}') {
                        new_keyfile.insert(new_keyfile.size() - 1, " (workspace=[current])");
                        mark_line_change = true;
                        state = SCAN;
                    } else {
                        state = OPEN_STATIC_GROUP_OR_PATTERN;
                    }
                } else {
                    state = SCAN;
                    last_word.clear();
                }
            } else { // possible '(next|prev)(group|window)'
                last_word += c;
            }
            break;
        case OPEN_STATIC_GROUP_OR_PATTERN:
            if (c == '{') { // NextWindow {static group}
                state = CLOSE_STATIC_GROUP;
            } else if (c == '(') { // NextWindow (foo=bar)
                new_keyfile += "workspace=[current]) (";
                mark_line_change = true;
                state = SCAN;
            } else if (c == '}') { // MacroCmd {NextWindow }
                new_keyfile.insert(new_keyfile.size() - 1, " (workspace=[current]) ");
                mark_line_change = true;
                state = SCAN;
            }
            break;
       case CLOSE_STATIC_GROUP:
            if (c == '}') {
                new_keyfile += " (workspace=[current]) ";
                mark_line_change = true;
                state = SCAN;
            }
            break;
        };

        if (*pos == '\n') { // a new line or a comment resets the state
            if (mark_line_change)
                new_keyfile.insert(new_keyfile.size() - 1, " !! FBCV13 !!");
            mark_line_change = false;
            last_word.clear();
            state = SCAN;
        } else if (*pos == '#' || *pos == '!') {
            last_word.clear();
            state = COMMENT;
        }

    }

    new_keyfile += "\n"; // just for good looks
    write_file(keyfilename, new_keyfile);
}

/*------------------------------------------------------------------*\
\*------------------------------------------------------------------*/

struct Update {
    int version;
    void (*update)(FbTk::ResourceManager& rm, const FbTk::FbString&, const FbTk::FbString&);
};

const Update UPDATES[] = {
    {  1, update_add_mouse_evens_to_keys },
    {  2, update_move_groups_entries_to_apps_file },
    {  3, update_move_toolbar_wheeling_to_keys_file },
    {  4, update_move_modkey_to_keys_file },
    {  5, update_window_patterns_for_iconbar },
    {  6, update_move_titlebar_actions_to_keys_file },
    {  7, update_added_starttabbing_command },
    {  8, update_disable_icons_in_tabs_for_backwards_compatibility },
    {  9, update_change_format_of_split_placement_menu },
    { 10, update_update_keys_file_for_nextwindow_syntax_changes },
    { 11, update_keys_for_ongrip_onwindowborder },
    { 12, update_keys_for_activetab },
    { 13, update_limit_nextwindow_to_current_workspace }
};

/*------------------------------------------------------------------*\
\*------------------------------------------------------------------*/

int run_updates(int old_version, FbTk::ResourceManager &rm) {
    int new_version = old_version;

    FbTk::Resource<string> rc_keyfile(rm, "~/.fluxbox/keys",
            "session.keyFile", "Session.KeyFile");
    FbTk::Resource<string> rc_appsfile(rm, "~/.fluxbox/apps",
            "session.appsFile", "Session.AppsFile");

    string appsfilename = FbTk::StringUtil::expandFilename(*rc_appsfile);
    string keyfilename = FbTk::StringUtil::expandFilename(*rc_keyfile);

    for (size_t i = 0; i < sizeof(UPDATES) / sizeof(Update); ++i) {
        if (old_version < UPDATES[i].version) {
            UPDATES[i].update(rm, keyfilename, appsfilename);
            new_version = UPDATES[i].version;
        }
    }

    return new_version;
}

int main(int argc, char **argv) {
    string rc_filename;
    set<string> style_filenames;
    int i = 1;
    bool check = 0;
    pid_t fb_pid = 0;

    FbTk::NLSInit("fluxbox.cat");
    _FB_USES_NLS;

    for (; i < argc; i++) {
        string arg = argv[i];
        if (arg == "-rc") {
            // look for alternative rc file to use

            if ((++i) >= argc) {
                cerr<<_FB_CONSOLETEXT(main, RCRequiresArg,
                              "error: '-rc' requires an argument", "the -rc option requires a file argument")<<endl;
                exit(1);
            }

            rc_filename = argv[i];
        } else if (arg == "-pid") {
            if ((++i) >= argc) {
                // need translations for this, too
                cerr<<"the -pid option requires a numeric argument"<<endl;
            } else
                fb_pid = atoi(argv[i]);
        } else if (arg == "-check") {
            check = true;
        } else if (arg == "-help" || arg == "-h") {
            // no NLS translations yet -- we'll just have to use English for now
            cout << "  -rc <string>\t\t\tuse alternate resource file.\n"
                 << "  -pid <int>\t\t\ttell fluxbox to reload configuration.\n"
                 << "  -check\t\t\tcheck version of this tool and the fluxbox config.\n"
                 << "  -help\t\t\t\tdisplay this help text and exit.\n\n"
                 << endl;
            exit(0);
        }
    }

    if (rc_filename.empty())
        rc_filename = getenv("HOME") + string("/.fluxbox/init");

    FbTk::ResourceManager resource_manager(rc_filename.c_str(),false);
    if (!resource_manager.load(rc_filename.c_str())) {
        // couldn't load rc file
        cerr<<_FB_CONSOLETEXT(Fluxbox, CantLoadRCFile, "Failed to load database", "Failed trying to read rc file")<<":"<<rc_filename<<endl;
        cerr<<_FB_CONSOLETEXT(Fluxbox, CantLoadRCFileTrying, "Retrying with", "Retrying rc file loading with (the following file)")<<": "<<DEFAULT_INITFILE<<endl;

        // couldn't load default rc file, either
        if (!resource_manager.load(DEFAULT_INITFILE)) {
            cerr<<_FB_CONSOLETEXT(Fluxbox, CantLoadRCFile, "Failed to load database", "")<<": "<<DEFAULT_INITFILE<<endl;
            exit(1); // this is a fatal error for us
        }
    }

    // run updates here
    // I feel like putting this in a separate function for no apparent reason

    FbTk::Resource<int> config_version(resource_manager, 0,
            "session.configVersion", "Session.ConfigVersion");

    if (check) {
        cout << rc_filename << ": " << *config_version << endl
            << "fluxbox-update_configs: " << UPDATES[sizeof(UPDATES)/sizeof(Update) - 1].version << endl;
        exit(0);
    }


    int old_version = *config_version;
    int new_version = run_updates(old_version, resource_manager);
    if (new_version > old_version) {
        // configs were updated -- let's save our changes
        config_version = new_version;
        resource_manager.save(rc_filename.c_str(), rc_filename.c_str());
        save_all_files();

#if defined(HAVE_SIGNAL_H) && !defined(_WIN32)
        // if we were given a fluxbox pid, send it a reconfigure signal
        if (fb_pid > 0)
            kill(fb_pid, SIGUSR2);
#endif // defined(HAVE_SIGNAL_H) && !defined(_WIN32)

    }

    return 0;
}

namespace {

set<string> modified_files;
// we may want to put a size limit on this cache, so it doesn't grow too big
map<string,string> file_cache;

}

// returns the contents of the file given, either from the cache or by reading
// the file from disk
string read_file(const string& filename) {
    // check if we already have the file in memory
    map<string,string>::iterator it = file_cache.find(filename);
    if (it != file_cache.end())
        return it->second;

    if (!FbTk::FileUtil::isRegularFile(filename.c_str())) {
        return "";
    }

    // nope, we'll have to read the file
    ifstream infile(filename.c_str());
    string whole_file = "";

    if (!infile) // failed to open file
        return whole_file;

    string linebuffer;
    while (!infile.eof()) {
        getline(infile, linebuffer);
        whole_file += linebuffer + "\n";
    }
    infile.close();

    file_cache[filename] = whole_file;
    return whole_file;
}

#ifdef NOT_USED
// remove the file from the cache, writing to disk if it's been changed
void forget_file(const string& filename) {
    map<string,string>::iterator cache_it = file_cache.find(filename);
    // check if we knew about the file to begin with
    if (cache_it == file_cache.end())
        return;

    // check if we've actually modified it
    set<string>::iterator mod_it = modified_files.find(filename);
    if (mod_it == modified_files.end()) {
        file_cache.erase(cache_it);
        return;
    }

    // flush our changes to disk and remove all traces
    ofstream outfile(filename.c_str());
    outfile << cache_it->second;
    file_cache.erase(cache_it);
    modified_files.erase(mod_it);
}
#endif // NOT_USED

// updates the file contents in the cache and marks the file as modified so it
// gets saved later
void write_file(const string& filename, const string &contents) {
    modified_files.insert(filename);
    file_cache[filename] = contents;
}

// actually save all the files we've modified
void save_all_files() {
    set<string>::iterator it = modified_files.begin();
    set<string>::iterator it_end = modified_files.end();
    for (; it != it_end; ++it) {
        ofstream outfile(it->c_str());
        outfile << file_cache[it->c_str()];
    }
    modified_files.clear();
}