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path: root/legacy/efreet/src/lib/efreet_desktop.c
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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#undef alloca
#ifdef HAVE_ALLOCA_H
# include <alloca.h>
#elif defined __GNUC__
# define alloca __builtin_alloca
#elif defined _AIX
# define alloca __alloca
#elif defined _MSC_VER
# include <malloc.h>
# define alloca _alloca
#else
# include <stddef.h>
# ifdef  __cplusplus
extern "C"
# endif
void *alloca (size_t);
#endif

#include <libgen.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>

#ifdef HAVE_EVIL
# include <Evil.h>
#endif

#include <Ecore_File.h>

/* define macros and variable for using the eina logging system  */
#define EFREET_MODULE_LOG_DOM _efreet_desktop_log_dom
int _efreet_desktop_log_dom = -1;

#include "Efreet.h"
#include "efreet_private.h"

#define DESKTOP_VERSION "1.0"

/**
 * A cache of all loaded desktops, hashed by file name.
 * Values are Efreet_Desktop structures
 */
Eina_Hash *efreet_desktop_cache = NULL;

/**
 * The current desktop environment (e.g. "Enlightenment" or "Gnome")
 */
static const char *desktop_environment = NULL;

/**
 * A cache of all unknown desktop dirs
 */
static Eina_List *efreet_desktop_dirs = NULL;

/**
 * A list of the desktop types available
 */
static Eina_List *efreet_desktop_types = NULL;

static Eina_Hash *change_monitors = NULL;

EAPI int EFREET_DESKTOP_TYPE_APPLICATION = 0;
EAPI int EFREET_DESKTOP_TYPE_LINK = 0;
EAPI int EFREET_DESKTOP_TYPE_DIRECTORY = 0;

/**
 * @internal
 * Information about custom types
 */
typedef struct Efreet_Desktop_Type_Info Efreet_Desktop_Type_Info;
struct Efreet_Desktop_Type_Info
{
    int id;
    const char *type;
    Efreet_Desktop_Type_Parse_Cb parse_func;
    Efreet_Desktop_Type_Save_Cb save_func;
    Efreet_Desktop_Type_Free_Cb free_func;
};

static int efreet_desktop_cache_check(Efreet_Desktop *desktop);
static int efreet_desktop_read(Efreet_Desktop *desktop);
static Efreet_Desktop_Type_Info *efreet_desktop_type_parse(const char *type_str);
static void efreet_desktop_type_info_free(Efreet_Desktop_Type_Info *info);
static void *efreet_desktop_application_fields_parse(Efreet_Desktop *desktop,
                                                    Efreet_Ini *ini);
static void efreet_desktop_application_fields_save(Efreet_Desktop *desktop,
                                                    Efreet_Ini *ini);
static void *efreet_desktop_link_fields_parse(Efreet_Desktop *desktop,
                                                Efreet_Ini *ini);
static void efreet_desktop_link_fields_save(Efreet_Desktop *desktop,
                                                Efreet_Ini *ini);
static int efreet_desktop_generic_fields_parse(Efreet_Desktop *desktop,
                                                Efreet_Ini *ini);
static void efreet_desktop_generic_fields_save(Efreet_Desktop *desktop,
                                                Efreet_Ini *ini);
static Eina_Bool efreet_desktop_x_fields_parse(const Eina_Hash *hash,
                                                const void *key,
                                                void *data,
                                                void *fdata);
static Eina_Bool efreet_desktop_x_fields_save(const Eina_Hash *hash,
                                                const void *key,
                                                void *value,
                                                void *fdata);
static int efreet_desktop_environment_check(Efreet_Desktop *desktop);

static void efreet_desktop_changes_listen(void);
static void efreet_desktop_changes_listen_recursive(const char *path);
static void efreet_desktop_changes_monitor_add(const char *path);
static void efreet_desktop_changes_cb(void *data, Ecore_File_Monitor *em,
                                             Ecore_File_Event event, const char *path);

/**
 * @internal
 * @return Returns > 0 on success or 0 on failure
 * @brief Initialize the Desktop parser subsystem
 */
int
efreet_desktop_init(void)
{
    _efreet_desktop_log_dom = eina_log_domain_register
      ("efreet_desktop", EFREET_DEFAULT_LOG_COLOR);
    if (_efreet_desktop_log_dom < 0)
    {
        ERR("Efreet: Could not create a log domain for efreet_desktop");
        return 0;
    }

#ifdef HAVE_EVIL
    if (!evil_sockets_init())
      {
         ERR("Could not initialize Winsock system");
         return 0;
      }
#endif

    efreet_desktop_cache = eina_hash_string_superfast_new(NULL);
    efreet_desktop_types = NULL;

    EFREET_DESKTOP_TYPE_APPLICATION = efreet_desktop_type_add("Application",
                                        efreet_desktop_application_fields_parse,
                                        efreet_desktop_application_fields_save,
                                        NULL);
    EFREET_DESKTOP_TYPE_LINK = efreet_desktop_type_add("Link",
                                    efreet_desktop_link_fields_parse,
                                    efreet_desktop_link_fields_save, NULL);
    EFREET_DESKTOP_TYPE_DIRECTORY = efreet_desktop_type_add("Directory", NULL,
                                                                NULL, NULL);

    efreet_desktop_changes_listen();
    return 1;
}

/**
 * @internal
 * @returns the number of initializations left for this system
 * @brief Attempts to shut down the subsystem if nothing else is using it
 */
void
efreet_desktop_shutdown(void)
{
    Efreet_Desktop_Type_Info *info;
    char *dir;

    IF_RELEASE(desktop_environment);
    IF_FREE_HASH(efreet_desktop_cache);
    EINA_LIST_FREE(efreet_desktop_types, info)
        efreet_desktop_type_info_free(info);
    EINA_LIST_FREE(efreet_desktop_dirs, dir)
        eina_stringshare_del(dir);
    IF_FREE_HASH(change_monitors);
#ifdef HAVE_EVIL
    evil_sockets_shutdown();
#endif
    eina_log_domain_unregister(_efreet_desktop_log_dom);
    _efreet_desktop_log_dom = -1;
}

/**
 * @param file The file to get the Efreet_Desktop from
 * @return Returns a reference to a cached Efreet_Desktop on success, NULL
 * on failure. This reference should not be freed.
 * @brief Gets a reference to an Efreet_Desktop structure representing the
 * contents of @a file or NULL if @a file is not a valid .desktop file.
 *
 * By using efreet_desktop_get the Efreet_Desktop will be saved in an internal
 * cache, and changes will be signalled by events.
 *
 * Efreet will also try to save all files fetched by efreet_desktop_get in a
 * cache to speed up further requests.
 */
EAPI Efreet_Desktop *
efreet_desktop_get(const char *file)
{
    /* TODO: Check if we need to differentiate between desktop_new and desktop_get */
    Efreet_Desktop *desktop;

    if (!file) return NULL;
    if (efreet_desktop_cache)
    {
        char rp[PATH_MAX];

        if (!realpath(file, rp)) return NULL;
        desktop = eina_hash_find(efreet_desktop_cache, rp);
        if (desktop)
        {
            if (efreet_desktop_cache_check(desktop))
            {
                desktop->ref++;
                return desktop;
            }

            desktop->cached = 0;
            eina_hash_del_by_key(efreet_desktop_cache, rp);
        }
    }

    desktop = efreet_desktop_new(file);
    if (!desktop) return NULL;

    if (!desktop->eet)
    {
        char buf[PATH_MAX];
        char *p;

        /*
         * Read file from disk, save path in cache so it will be included in next
         * cache update
         */
        strncpy(buf, desktop->orig_path, PATH_MAX);
        buf[PATH_MAX - 1] = '\0';
        p = dirname(buf);
        if (!eina_list_search_unsorted(efreet_desktop_dirs, EINA_COMPARE_CB(strcmp), p))
            efreet_desktop_dirs = eina_list_append(efreet_desktop_dirs, eina_stringshare_add(p));
        efreet_cache_desktop_update();
    }

    if (efreet_desktop_cache) eina_hash_direct_add(efreet_desktop_cache, desktop->orig_path, desktop);
    desktop->cached = 1;
    return desktop;
}

/**
 * @param desktop The Efreet_Desktop to ref
 * @return Returns the new reference count
 * @brief Increases reference count on desktop
 */
EAPI int
efreet_desktop_ref(Efreet_Desktop *desktop)
{
    if (!desktop) return 0;
    desktop->ref++;
    return desktop->ref;
}

/**
 * @param file The file to create the Efreet_Desktop from
 * @return Returns a new empty_Efreet_Desktop on success, NULL on failure
 * @brief Creates a new empty Efreet_Desktop structure or NULL on failure
 */
EAPI Efreet_Desktop *
efreet_desktop_empty_new(const char *file)
{
    Efreet_Desktop *desktop;

    desktop = NEW(Efreet_Desktop, 1);
    if (!desktop) return NULL;

    desktop->orig_path = strdup(file);
    desktop->load_time = ecore_file_mod_time(file);

    desktop->ref = 1;

    return desktop;
}

/**
 * @param file The file to create the Efreet_Desktop from
 * @return Returns a new Efreet_Desktop on success, NULL on failure
 * @brief Creates a new Efreet_Desktop structure initialized from the
 * contents of @a file or NULL on failure
 *
 * By using efreet_desktop_new the caller will get a unique copy of a
 * Efreet_Desktop. The Efreet_Desktop should immidiatly after use be free'd,
 * as there is no guarantee how long the pointers will be valid.
 */
EAPI Efreet_Desktop *
efreet_desktop_new(const char *file)
{
    Efreet_Desktop *desktop = NULL;

    if (!file) return NULL;
    desktop = efreet_cache_desktop_find(file);
    if (desktop)
    {
        if (desktop->load_time == ecore_file_mod_time(desktop->orig_path))
        {
            if (!efreet_desktop_environment_check(desktop))
            {
                efreet_desktop_free(desktop);
                return NULL;
            }
            return desktop;
        }
        efreet_desktop_free(desktop);
    }
    return efreet_desktop_uncached_new(file);
}

/**
 * @param file The file to create the Efreet_Desktop from
 * @return Returns a new Efreet_Desktop on success, NULL on failure
 * @brief Creates a new Efreet_Desktop structure initialized from the
 * contents of @a file or NULL on failure
 *
 * By using efreet_desktop_uncached_new the Efreet_Desktop structure will be
 * read from disk, and not from any cache.
 */
EAPI Efreet_Desktop *
efreet_desktop_uncached_new(const char *file)
{
    Efreet_Desktop *desktop = NULL;
    char rp[PATH_MAX];

    if (!file) return NULL;
    if (!realpath(file, rp)) return NULL;
    if (!ecore_file_exists(rp)) return NULL;

    desktop = NEW(Efreet_Desktop, 1);
    if (!desktop) return NULL;
    desktop->orig_path = strdup(rp);
    desktop->ref = 1;
    if (!efreet_desktop_read(desktop))
    {
        efreet_desktop_free(desktop);
        return NULL;
    }

    return desktop;
}

/**
 * @param desktop The desktop file to save
 * @return Returns 1 on success or 0 on failure
 * @brief Saves any changes made to @a desktop back to the file on the
 * filesystem
 */
EAPI int
efreet_desktop_save(Efreet_Desktop *desktop)
{
    Efreet_Desktop_Type_Info *info;
    Efreet_Ini *ini;
    int ok = 1;

    ini = efreet_ini_new(NULL);
    if (!ini) return 0;
    efreet_ini_section_add(ini, "Desktop Entry");
    efreet_ini_section_set(ini, "Desktop Entry");

    info = eina_list_nth(efreet_desktop_types, desktop->type);
    if (info)
    {
        efreet_ini_string_set(ini, "Type", info->type);
        if (info->save_func) info->save_func(desktop, ini);
    }
    else
        ok = 0;

    if (ok)
    {
        char *val;

        if (desktop->only_show_in)
        {
            val = efreet_desktop_string_list_join(desktop->only_show_in);
            if (val)
            {
                efreet_ini_string_set(ini, "OnlyShowIn", val);
                FREE(val);
            }
        }
        if (desktop->not_show_in)
        {
            val = efreet_desktop_string_list_join(desktop->not_show_in);
            if (val)
            {
                efreet_ini_string_set(ini, "NotShowIn", val);
                FREE(val);
            }
        }
        efreet_desktop_generic_fields_save(desktop, ini);
        /* When we save the file, it should be updated to the
         * latest version that we support! */
        efreet_ini_string_set(ini, "Version", DESKTOP_VERSION);

        if (!efreet_ini_save(ini, desktop->orig_path)) ok = 0;
    }
    efreet_ini_free(ini);
    return ok;
}

/**
 * @param desktop The desktop file to save
 * @param file The filename to save as
 * @return Returns 1 on success or 0 on failure
 * @brief Saves @a desktop to @a file
 */
EAPI int
efreet_desktop_save_as(Efreet_Desktop *desktop, const char *file)
{
    if (desktop->cached && efreet_desktop_cache &&
        desktop == eina_hash_find(efreet_desktop_cache, desktop->orig_path))
    {
        desktop->cached = 0;
        eina_hash_del_by_key(efreet_desktop_cache, desktop->orig_path);
    }
    FREE(desktop->orig_path);
    desktop->orig_path = strdup(file);
    return efreet_desktop_save(desktop);
}

/**
 * @param desktop The Efreet_Desktop to work with
 * @return Returns no value
 * @brief Frees the Efreet_Desktop structure and all of it's data
 */
EAPI void
efreet_desktop_free(Efreet_Desktop *desktop)
{
    if (!desktop) return;

    desktop->ref--;
    if (desktop->ref > 0) return;

    if (desktop->cached)
    {
       if (efreet_desktop_cache &&
           desktop == eina_hash_find(efreet_desktop_cache, desktop->orig_path))
       {
           eina_hash_del_by_key(efreet_desktop_cache, desktop->orig_path);
       }
       efreet_cache_desktop_free(desktop);
    }

    if (desktop->eet)
    {
        eina_list_free(desktop->only_show_in);
        eina_list_free(desktop->not_show_in);
        eina_list_free(desktop->categories);
        eina_list_free(desktop->mime_types);
        IF_FREE_HASH(desktop->x);
    }
    else
    {
        IF_FREE(desktop->orig_path);

        IF_FREE(desktop->version);
        IF_FREE(desktop->name);
        IF_FREE(desktop->generic_name);
        IF_FREE(desktop->comment);
        IF_FREE(desktop->icon);
        IF_FREE(desktop->url);

        IF_FREE(desktop->try_exec);
        IF_FREE(desktop->exec);
        IF_FREE(desktop->path);
        IF_FREE(desktop->startup_wm_class);

        IF_FREE_LIST(desktop->only_show_in, eina_stringshare_del);
        IF_FREE_LIST(desktop->not_show_in, eina_stringshare_del);

        IF_FREE_LIST(desktop->categories, eina_stringshare_del);
        IF_FREE_LIST(desktop->mime_types, eina_stringshare_del);

        IF_FREE_HASH(desktop->x);

        if (desktop->type_data)
        {
            Efreet_Desktop_Type_Info *info;
            info = eina_list_nth(efreet_desktop_types, desktop->type);
            if (info->free_func)
                info->free_func(desktop->type_data);
        }
    }
    FREE(desktop);
}

/**
 * @param environment the environment name
 * @brief sets the global desktop environment name
 */
EAPI void
efreet_desktop_environment_set(const char *environment)
{
    if (desktop_environment) eina_stringshare_del(desktop_environment);
    if (environment) desktop_environment = eina_stringshare_add(environment);
    else desktop_environment = NULL;
}

/**
 * @return environment the environment name
 * @brief sets the global desktop environment name
 */
EAPI const char *
efreet_desktop_environment_get(void)
{
    return desktop_environment;
}

/**
 * @param desktop The desktop to work with
 * @return Returns the number of categories assigned to this desktop
 * @brief Retrieves the number of categories the given @a desktop belongs
 * too
 */
EAPI unsigned int
efreet_desktop_category_count_get(Efreet_Desktop *desktop)
{
    if (!desktop || !desktop->categories) return 0;
    return eina_list_count(desktop->categories);
}

/**
 * @param desktop the desktop
 * @param category the category name
 * @brief add a category to a desktop
 */
EAPI void
efreet_desktop_category_add(Efreet_Desktop *desktop, const char *category)
{
    if (!desktop) return;

    if (eina_list_search_unsorted(desktop->categories,
                                  EINA_COMPARE_CB(strcmp), category)) return;

    desktop->categories = eina_list_append(desktop->categories,
                        (void *)eina_stringshare_add(category));
}

/**
 * @param desktop the desktop
 * @param category the category name
 * @brief removes a category from a desktop
 * @return 1 if the desktop had his category listed, 0 otherwise
 */
EAPI int
efreet_desktop_category_del(Efreet_Desktop *desktop, const char *category)
{
    char *found = NULL;

    if (!desktop || !desktop->categories) return 0;

    if ((found = eina_list_search_unsorted(desktop->categories,
                                           EINA_COMPARE_CB(strcmp), category)))
    {
        eina_stringshare_del(found);
        desktop->categories = eina_list_remove(desktop->categories, found);

        return 1;
    }

    return 0;
}

/**
 * @param type The type to add to the list of matching types
 * @param parse_func a function to parse out custom fields
 * @param save_func a function to save data returned from @a parse_func
 * @param free_func a function to free data returned from @a parse_func
 * @return Returns the id of the new type
 * @brief Adds the given type to the list of types in the system
 */
EAPI int
efreet_desktop_type_add(const char *type, Efreet_Desktop_Type_Parse_Cb parse_func,
                        Efreet_Desktop_Type_Save_Cb save_func,
                        Efreet_Desktop_Type_Free_Cb free_func)
{
    int id;
    Efreet_Desktop_Type_Info *info;

    info = NEW(Efreet_Desktop_Type_Info, 1);
    if (!info) return 0;

    id = eina_list_count(efreet_desktop_types);

    info->id = id;
    info->type = eina_stringshare_add(type);
    info->parse_func = parse_func;
    info->save_func = save_func;
    info->free_func = free_func;

    efreet_desktop_types = eina_list_append(efreet_desktop_types, info);

    return id;
}

/**
 * @brief Add an alias for an existing desktop type.
 * @param from_type the type to alias (e.g. EFREE_DESKTOP_TYPE_APPLICATION)
 * @param alias the alias
 * @return the new type id, or -1 if @p from_type was not valid
 *
 * This allows applications to add non-standard types that behave exactly as standard types.
 */
EAPI int
efreet_desktop_type_alias(int from_type, const char *alias)
{
    Efreet_Desktop_Type_Info *info;
    info = eina_list_nth(efreet_desktop_types, from_type);
    if (!info) return -1;

    return efreet_desktop_type_add(alias, info->parse_func, info->save_func, info->free_func);
}

/**
 * @brief Set the value for a X- field (Non spec) in the structure
 * @param desktop the desktop
 * @param key the key name to set
 * @param data the value to set
 * @return EINA_TRUE on success
 *
 * The key has to start with "X-"
 */
EAPI Eina_Bool
efreet_desktop_x_field_set(Efreet_Desktop *desktop, const char *key, const char *data)
{
    if (!desktop || strncmp(key, "X-", 2))
        return EINA_FALSE;

    if (!desktop->x)
        desktop->x = eina_hash_string_superfast_new(EINA_FREE_CB(eina_stringshare_del));

    eina_hash_del_by_key(desktop->x, key);
    eina_hash_add(desktop->x, key, eina_stringshare_add(data));

    return EINA_TRUE;
}

/**
 * @brief Get the value for a X- field (Non spec) in the structure
 * @param desktop the desktop
 * @param key the key
 * @return The value referenced by the key, or NULL if the key does not exist
 */
EAPI const char *
efreet_desktop_x_field_get(Efreet_Desktop *desktop, const char *key)
{
    const char *ret;

    if (!desktop || strncmp(key, "X-", 2))
        return NULL;

    if (!desktop->x)
        return NULL;

    ret = eina_hash_find(desktop->x, key);
    if (!ret)
        return NULL;

    return eina_stringshare_add(ret);
}

/**
 * @brief Delete the key and value for a X- field (Non spec) in the structure
 * @param desktop the desktop
 * @param key the key
 * @return EINA_TRUE if the key existed
 */
EAPI Eina_Bool
efreet_desktop_x_field_del(Efreet_Desktop *desktop, const char *key)
{
    if (!desktop || strncmp(key, "X-", 2))
        return EINA_FALSE;

    if (!desktop->x)
        return EINA_FALSE;

    return eina_hash_del_by_key(desktop->x, key);
}

/**
 * @brief get type specific data for custom desktop types
 * @param desktop the desktop
 * @return type specific data, or NULL if there is none
 */
EAPI void *
efreet_desktop_type_data_get(Efreet_Desktop *desktop)
{
    return desktop->type_data;
}

/**
 * @param string the raw string list
 * @return an Eina_List of ecore string's
 * @brief Parse ';' separate list of strings according to the desktop spec
 */
EAPI Eina_List *
efreet_desktop_string_list_parse(const char *string)
{
    Eina_List *list = NULL;
    char *tmp;
    char *s, *p;
    size_t len;

    if (!string) return NULL;

    len = strlen(string) + 1;
    tmp = alloca(len);
    memcpy(tmp, string, len);
    s = tmp;

    while ((p = strchr(s, ';')))
    {
        if (p > tmp && *(p-1) == '\\') continue;
        *p = '\0';
        list = eina_list_append(list, (void *)eina_stringshare_add(s));
        s = p + 1;
    }
    /* If this is true, the .desktop file does not follow the standard */
    if (*s)
    {
#ifdef STRICT_SPEC
        WRN("[Efreet]: Found a string list without ';' "
                "at the end: %s", string);
#endif
        list = eina_list_append(list, (void *)eina_stringshare_add(s));
    }

    return list;
}

/**
 * @param list Eina_List with strings
 * @return a raw string list
 * @brief Create a ';' separate list of strings according to the desktop spec
 */
EAPI char *
efreet_desktop_string_list_join(Eina_List *list)
{
    Eina_List *l;
    const char *elem;
    char *string;
    size_t size, pos, len;

    if (!list) return strdup("");

    size = 1024;
    string = malloc(size);
    if (!string) return NULL;
    pos = 0;

    EINA_LIST_FOREACH(list, l, elem)
    {
        len = strlen(elem);
        /* +1 for ';' */
        if ((len + pos + 1) >= size)
        {
            char *tmp;
            size = len + pos + 1024;
            tmp = realloc(string, size);
            if (!tmp)
            {
                free(string);
                return NULL;
            }
            string = tmp;
        }
        strcpy(string + pos, elem);
        pos += len;
        strcpy(string + pos, ";");
        pos += 1;
    }
    return string;
}

int
efreet_desktop_write_cache_dirs_file(void)
{
    char file[PATH_MAX];
    int fd = -1;
    int cachefd = -1;
    char *dir;
    struct stat st;
    struct flock fl;

    if (!efreet_desktop_dirs) return 1;

    snprintf(file, sizeof(file), "%s/desktop_data.lock", efreet_cache_home_get());
    fd = open(file, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR);
    if (fd < 0) return 0;
    efreet_fsetowner(fd);
    /* TODO: Retry update cache later */
    memset(&fl, 0, sizeof(struct flock));
    fl.l_type = F_WRLCK;
    fl.l_whence = SEEK_SET;
    if (fcntl(fd, F_SETLK, &fl) < 0) goto error;

    cachefd = open(efreet_desktop_cache_dirs(), O_CREAT | O_APPEND | O_RDWR, S_IRUSR | S_IWUSR);
    if (cachefd < 0) goto error;
    efreet_fsetowner(cachefd);
    if (fstat(cachefd, &st) < 0) goto error;
    if (st.st_size > 0)
    {
        Eina_List *l, *ln;
        char *p;
        char *map;

        map = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, cachefd, 0);
        if (map == MAP_FAILED) goto error;
        p = map;
        while (p < map + st.st_size)
        {
            unsigned int size = *(unsigned int *)p;
            p += sizeof(unsigned int);
            EINA_LIST_FOREACH_SAFE(efreet_desktop_dirs, l, ln, dir)
            {
                if (!strcmp(dir, p))
                {
                    efreet_desktop_dirs = eina_list_remove_list(efreet_desktop_dirs, l);
                    eina_stringshare_del(dir);
                    break;
                }
            }
            p += size;
        }
        munmap(map, st.st_size);
    }
    EINA_LIST_FREE(efreet_desktop_dirs, dir)
    {
        unsigned int size = strlen(dir) + 1;
        size_t count;

        count = write(cachefd, &size, sizeof(int));
        count += write(cachefd, dir, size);

        if (count != sizeof(int) + size)
            DBG("Didn't write all data on cachefd");

        efreet_desktop_changes_monitor_add(dir);
        eina_stringshare_del(dir);
    }
    efreet_desktop_dirs = NULL;
    if (fd >= 0) close(fd);
    if (cachefd >= 0) close(cachefd);
    return 1;

error:
    if (fd >= 0) close(fd);
    if (cachefd >= 0) close(cachefd);
    return 0;
}

/**
 * @internal
 * @param desktop The desktop to check
 * @return Returns 1 if the cache is still valid, 0 otherwise
 * @brief This will check if the desktop cache is still valid.
 */
static int
efreet_desktop_cache_check(Efreet_Desktop *desktop)
{
    if (!desktop) return 0;

    /* have we modified this file since we last read it in? */
    if (ecore_file_mod_time(desktop->orig_path) != desktop->load_time)
        return 0;

    return 1;
}

/**
 * @internal
 * @param desktop The desktop to fill
 * @return Returns 1 on success, 0 on failure
 * @brief initialize an Efreet_Desktop from the contents of @a file
 */
static int
efreet_desktop_read(Efreet_Desktop *desktop)
{
    Efreet_Ini *ini;
    int error = 0;
    int ok;

    ini = efreet_ini_new(desktop->orig_path);
    if (!ini) return 0;
    if (!ini->data)
    {
        efreet_ini_free(ini);
        return 0;
    }

    ok = efreet_ini_section_set(ini, "Desktop Entry");
    if (!ok) ok = efreet_ini_section_set(ini, "KDE Desktop Entry");
    if (!ok)
    {
        ERR("efreet_desktop_new error: no Desktop Entry section");
        error = 1;
    }

    if (!error)
    {
        Efreet_Desktop_Type_Info *info;

        info = efreet_desktop_type_parse(efreet_ini_string_get(ini, "Type"));
        if (info)
        {
            const char *val;

            desktop->type = info->id;
            val = efreet_ini_string_get(ini, "Version");
            if (val) desktop->version = strdup(val);

            if (info->parse_func)
                desktop->type_data = info->parse_func(desktop, ini);
        }
        else
            error = 1;
    }

    if (!error && !efreet_desktop_generic_fields_parse(desktop, ini)) error = 1;
    if (!error && !efreet_desktop_environment_check(desktop)) error = 1;
    if (!error)
        eina_hash_foreach(ini->section, efreet_desktop_x_fields_parse, desktop);

    efreet_ini_free(ini);

    desktop->load_time = ecore_file_mod_time(desktop->orig_path);

    if (error) return 0;

    return 1;
}

/**
 * @internal
 * @param type_str the type as a string
 * @return the parsed type
 * @brief parse the type string into an Efreet_Desktop_Type
 */
static Efreet_Desktop_Type_Info *
efreet_desktop_type_parse(const char *type_str)
{
    Efreet_Desktop_Type_Info *info;
    Eina_List *l;

    if (!type_str) return NULL;

    EINA_LIST_FOREACH(efreet_desktop_types, l, info)
    {
        if (!strcmp(info->type, type_str))
            return info;
    }

    return NULL;
}

/**
 * @internal
 * @brief Free an Efreet Desktop_Type_Info struct
 */
static void
efreet_desktop_type_info_free(Efreet_Desktop_Type_Info *info)
{
    if (!info) return;
    IF_RELEASE(info->type);
    free(info);
}

/**
 * @internal
 * @param desktop the Efreet_Desktop to store parsed fields in
 * @param ini the Efreet_Ini to parse fields from
 * @return No value
 * @brief Parse application specific desktop fields
 */
static void *
efreet_desktop_application_fields_parse(Efreet_Desktop *desktop, Efreet_Ini *ini)
{
    const char *val;

    val = efreet_ini_string_get(ini, "TryExec");
    if (val) desktop->try_exec = strdup(val);

    val = efreet_ini_string_get(ini, "Exec");
    if (val) desktop->exec = strdup(val);

    val = efreet_ini_string_get(ini, "Path");
    if (val) desktop->path = strdup(val);

    val = efreet_ini_string_get(ini, "StartupWMClass");
    if (val) desktop->startup_wm_class = strdup(val);

    desktop->categories = efreet_desktop_string_list_parse(
                                efreet_ini_string_get(ini, "Categories"));
    desktop->mime_types = efreet_desktop_string_list_parse(
                                efreet_ini_string_get(ini, "MimeType"));

    desktop->terminal = efreet_ini_boolean_get(ini, "Terminal");
    desktop->startup_notify = efreet_ini_boolean_get(ini, "StartupNotify");

    return NULL;
}

/**
 * @internal
 * @param desktop the Efreet_Desktop to save fields from
 * @param ini the Efreet_Ini to save fields to
 * @return Returns no value
 * @brief Save application specific desktop fields
 */
static void
efreet_desktop_application_fields_save(Efreet_Desktop *desktop, Efreet_Ini *ini)
{
    char *val;

    if (desktop->try_exec)
        efreet_ini_string_set(ini, "TryExec", desktop->try_exec);

    if (desktop->exec)
        efreet_ini_string_set(ini, "Exec", desktop->exec);

    if (desktop->path)
        efreet_ini_string_set(ini, "Path", desktop->path);

    if (desktop->startup_wm_class)
        efreet_ini_string_set(ini, "StartupWMClass", desktop->startup_wm_class);

    if (desktop->categories)
    {
        val = efreet_desktop_string_list_join(desktop->categories);
        if (val)
        {
            efreet_ini_string_set(ini, "Categories", val);
            FREE(val);
        }
    }

    if (desktop->mime_types)
    {
        val = efreet_desktop_string_list_join(desktop->mime_types);
        if (val)
        {
           efreet_ini_string_set(ini, "MimeType", val);
           FREE(val);
        }
    }

    efreet_ini_boolean_set(ini, "Terminal", desktop->terminal);
    efreet_ini_boolean_set(ini, "StartupNotify", desktop->startup_notify);
}

/**
 * @internal
 * @param desktop the Efreet_Desktop to store parsed fields in
 * @param ini the Efreet_Ini to parse fields from
 * @return Returns no value
 * @brief Parse link specific desktop fields
 */
static void *
efreet_desktop_link_fields_parse(Efreet_Desktop *desktop, Efreet_Ini *ini)
{
    const char *val;

    val = efreet_ini_string_get(ini, "URL");
    if (val) desktop->url = strdup(val);
    return NULL;
}

/**
 * @internal
 * @param desktop the Efreet_Desktop to save fields from
 * @param ini the Efreet_Ini to save fields in
 * @return Returns no value
 * @brief Save link specific desktop fields
 */
static void
efreet_desktop_link_fields_save(Efreet_Desktop *desktop, Efreet_Ini *ini)
{
    if (desktop->url) efreet_ini_string_set(ini, "URL", desktop->url);
}

/**
 * @internal
 * @param desktop the Efreet_Desktop to store parsed fields in
 * @param ini the Efreet_Ini to parse fields from
 * @return 1 if parsed successfully, 0 otherwise
 * @brief Parse desktop fields that all types can include
 */
static int
efreet_desktop_generic_fields_parse(Efreet_Desktop *desktop, Efreet_Ini *ini)
{
    const char *val;
    const char *not_show_in = NULL, *only_show_in = NULL;

    val = efreet_ini_localestring_get(ini, "Name");
    if (val) desktop->name = strdup(val);
    else
    {
        ERR("efreet_desktop_generic_fields_parse error: no Name");
        return 0;
    }

    val = efreet_ini_localestring_get(ini, "GenericName");
    if (val) desktop->generic_name = strdup(val);

    val = efreet_ini_localestring_get(ini, "Comment");
    if (val) desktop->comment = strdup(val);

    val = efreet_ini_localestring_get(ini, "Icon");
    if (val) desktop->icon = strdup(val);

    desktop->no_display = efreet_ini_boolean_get(ini, "NoDisplay");
    desktop->hidden = efreet_ini_boolean_get(ini, "Hidden");

    only_show_in = efreet_ini_string_get(ini, "OnlyShowIn");
    not_show_in = efreet_ini_string_get(ini, "NotShowIn");
    if (only_show_in && not_show_in)
        WRN("Both OnlyShowIn and NotShowIn in %s, preferring OnlyShowIn", desktop->orig_path);
    if (only_show_in) desktop->only_show_in = efreet_desktop_string_list_parse(only_show_in);
    else if (not_show_in) desktop->not_show_in = efreet_desktop_string_list_parse(not_show_in);

    return 1;
}

/**
 * @internal
 * @param desktop the Efreet_Desktop to save fields from
 * @param ini the Efreet_Ini to save fields to
 * @return Returns nothing
 * @brief Save desktop fields that all types can include
 */
static void
efreet_desktop_generic_fields_save(Efreet_Desktop *desktop, Efreet_Ini *ini)
{
    const char *val;

    if (desktop->name)
    {
        efreet_ini_localestring_set(ini, "Name", desktop->name);
        val = efreet_ini_string_get(ini, "Name");
        if (!val)
            efreet_ini_string_set(ini, "Name", desktop->name);
    }
    if (desktop->generic_name)
    {
        efreet_ini_localestring_set(ini, "GenericName", desktop->generic_name);
        val = efreet_ini_string_get(ini, "GenericName");
        if (!val)
            efreet_ini_string_set(ini, "GenericName", desktop->generic_name);
    }
    if (desktop->comment)
    {
        efreet_ini_localestring_set(ini, "Comment", desktop->comment);
        val = efreet_ini_string_get(ini, "Comment");
        if (!val)
            efreet_ini_string_set(ini, "Comment", desktop->comment);
    }
    if (desktop->icon)
    {
        efreet_ini_localestring_set(ini, "Icon", desktop->icon);
        val = efreet_ini_string_get(ini, "Icon");
        if (!val)
            efreet_ini_string_set(ini, "Icon", desktop->icon);
    }

    efreet_ini_boolean_set(ini, "NoDisplay", desktop->no_display);
    efreet_ini_boolean_set(ini, "Hidden", desktop->hidden);

    if (desktop->x) eina_hash_foreach(desktop->x, efreet_desktop_x_fields_save,
                                        ini);
}

/**
 * @internal
 * @param node The node to work with
 * @param desktop The desktop file to work with
 * @return Returns always true, to be used in eina_hash_foreach()
 * @brief Parses out an X- key from @a node and stores in @a desktop
 */
static Eina_Bool
efreet_desktop_x_fields_parse(const Eina_Hash *hash __UNUSED__, const void *key, void *value, void *fdata)
{
    Efreet_Desktop * desktop = fdata;

    if (!desktop) return EINA_TRUE;
    if (strncmp(key, "X-", 2)) return EINA_TRUE;

    if (!desktop->x)
        desktop->x = eina_hash_string_superfast_new(EINA_FREE_CB(eina_stringshare_del));
    eina_hash_del_by_key(desktop->x, key);
    eina_hash_add(desktop->x, key, (void *)eina_stringshare_add(value));

    return EINA_TRUE;
}

/**
 * @internal
 * @param node The node to work with
 * @param ini The ini file to work with
 * @return Returns no value
 * @brief Stores an X- key from @a node and stores in @a ini
 */
static Eina_Bool
efreet_desktop_x_fields_save(const Eina_Hash *hash __UNUSED__, const void *key, void *value, void *fdata)
{
    Efreet_Ini *ini = fdata;
    efreet_ini_string_set(ini, key, value);

    return EINA_TRUE;
}


/**
 * @internal
 * @param ini The Efreet_Ini to parse values from
 * @return 1 if desktop should be included in current environement, 0 otherwise
 * @brief Determines if a desktop should be included in the current environment,
 * based on the values of the OnlyShowIn and NotShowIn fields
 */
static int
efreet_desktop_environment_check(Efreet_Desktop *desktop)
{
    Eina_List *list;
    int found = 0;
    char *val;

    if (!desktop_environment)
    {
        //if (desktop->only_show_in) return 0;
        return 1;
    }

    if (desktop->only_show_in)
    {
        EINA_LIST_FOREACH(desktop->only_show_in, list, val)
        {
            if (!strcmp(val, desktop_environment))
            {
                found = 1;
                break;
            }
        }
        return found;
    }


    if (desktop->not_show_in)
    {
        EINA_LIST_FOREACH(desktop->not_show_in, list, val)
        {
            if (!strcmp(val, desktop_environment))
            {
                found = 1;
                break;
            }
        }
        return !found;
    }

    return 1;
}

static void
efreet_desktop_changes_listen(void)
{
    int dirsfd = -1;
    Eina_List *dirs;
    char *path;
    struct stat st;

    if (!efreet_cache_update) return;

    change_monitors = eina_hash_string_superfast_new(EINA_FREE_CB(ecore_file_monitor_del));
    if (!change_monitors) return;

    dirs = efreet_default_dirs_get(efreet_data_home_get(),
                                   efreet_data_dirs_get(), "applications");

    EINA_LIST_FREE(dirs, path)
    {
        if (ecore_file_is_dir(path))
            efreet_desktop_changes_listen_recursive(path);
        eina_stringshare_del(path);
    }

    dirsfd = open(efreet_desktop_cache_dirs(), O_RDONLY, S_IRUSR | S_IWUSR);
    if (dirsfd >= 0)
    {
        if ((fstat(dirsfd, &st) == 0) && (st.st_size > 0))
        {
            char *p;
            char *map;

            map = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, dirsfd, 0);
            if (map == MAP_FAILED) goto error;
            p = map;
            while (p < map + st.st_size)
            {
                unsigned int size = *(unsigned int *)p;
                p += sizeof(unsigned int);
                if (ecore_file_is_dir(p))
                    efreet_desktop_changes_monitor_add(p);
                p += size;
            }
            munmap(map, st.st_size);
        }
        close(dirsfd);
    }

    return;
error:
    if (dirsfd >= 0) close(dirsfd);
}

static void
efreet_desktop_changes_listen_recursive(const char *path)
{
    char buf[PATH_MAX];
    DIR *files;
    struct dirent *file;

    efreet_desktop_changes_monitor_add(path);

    files = opendir(path);
    if (!files) return;
    while ((file = readdir(files)))
    {
        if (!file) break;
        if (!strcmp(file->d_name, ".") || !strcmp(file->d_name, "..")) continue;

        snprintf(buf, sizeof(buf), "%s/%s", path, file->d_name);
        if (ecore_file_is_dir(buf)) efreet_desktop_changes_listen_recursive(buf);
    }
    closedir(files);
}

static void
efreet_desktop_changes_monitor_add(const char *path)
{
    char rp[PATH_MAX];

    if (!realpath(path, rp)) return;
    if (eina_hash_find(change_monitors, rp)) return;
    eina_hash_add(change_monitors, rp,
                  ecore_file_monitor_add(rp,
                                         efreet_desktop_changes_cb,
                                         NULL));
}

static void
efreet_desktop_changes_cb(void *data __UNUSED__, Ecore_File_Monitor *em __UNUSED__,
                                 Ecore_File_Event event, const char *path)
{
    const char *ext;

    switch (event)
    {
        case ECORE_FILE_EVENT_NONE:
            /* noop */
            break;

        case ECORE_FILE_EVENT_CREATED_FILE:
        case ECORE_FILE_EVENT_DELETED_FILE:
        case ECORE_FILE_EVENT_MODIFIED:
            ext = strrchr(path, '.');
            if (!strcmp(ext, ".desktop") || !strcmp(ext, ".directory"))
                efreet_cache_desktop_update();
            break;

        case ECORE_FILE_EVENT_DELETED_SELF:
        case ECORE_FILE_EVENT_DELETED_DIRECTORY:
            eina_hash_del_by_key(change_monitors, path);
            efreet_cache_desktop_update();
            break;

        case ECORE_FILE_EVENT_CREATED_DIRECTORY:
            efreet_desktop_changes_monitor_add(path);
            efreet_cache_desktop_update();
            break;
    }
}