コード例 #1
0
/* Try to ensure free_size bytes of storage are available.
 * Returns 0 on success.
 * This is rather simple-minded because doing a full LRU would
 * be potentially memory-intensive, and without atime it would
 * also require that apps constantly modify file metadata even
 * when just reading from the cache, which is pretty awful.
 */
int free_cache(int64_t free_size)
{
    const char *name;
    int dfd, subfd;
    DIR *d;
    struct dirent *de;
    int64_t avail;
    char datadir[PKG_PATH_MAX];//ALPS00106329 +

    avail = disk_free();
    if (avail < 0) return -1;

    LOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", free_size, avail);
    if (avail >= free_size) return 0;
   
    //ALPS00106329 +    
    if (create_persona_path(datadir, 0)) {
        LOGE("couldn't get directory for persona 0");
        return -1;
    }

    d = opendir(datadir);
    //ALPS00106329 -
    if (d == NULL) {
        LOGE("cannot open %s: %s\n", datadir, strerror(errno));//ALPS00106329 + 
        return -1;
    }
    dfd = dirfd(d);

    while ((de = readdir(d))) {
        if (de->d_type != DT_DIR) continue;
        name = de->d_name;

        /* always skip "." and ".." */
        if (name[0] == '.') {
            if (name[1] == 0) continue;
            if ((name[1] == '.') && (name[2] == 0)) continue;
        }

        subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
        if (subfd < 0) continue;

        delete_dir_contents_fd(subfd, "cache");
        close(subfd);

        avail = disk_free();
        if (avail >= free_size) {
            closedir(d);
            return 0;
        }
    }
    closedir(d);

    /* Fail case - not possible to free space */
    return -1;
}
コード例 #2
0
/* Try to ensure free_size bytes of storage are available.
 * Returns 0 on success.
 * This is rather simple-minded because doing a full LRU would
 * be potentially memory-intensive, and without atime it would
 * also require that apps constantly modify file metadata even
 * when just reading from the cache, which is pretty awful.
 */
int free_cache(int free_size)
{
    const char *name;
    int dfd, subfd;
    DIR *d;
    struct dirent *de;
    int avail;

    avail = disk_free();
    if (avail < 0) return -1;

    LOGI("free_cache(%d) avail %d\n", free_size, avail);
    if (avail >= free_size) return 0;

    d = opendir(PKG_DIR_PREFIX);
    if (d == NULL) {
        LOGE("cannot open %s\n", PKG_DIR_PREFIX);
        return -1;
    }
    dfd = dirfd(d);

    while ((de = readdir(d))) {
        if (de->d_type != DT_DIR) continue;
        name = de->d_name;

        /* always skip "." and ".." */
        if (name[0] == '.') {
            if (name[1] == 0) continue;
            if ((name[1] == '.') && (name[2] == 0)) continue;
        }

        subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
        if (subfd < 0) continue;

        delete_dir_contents_fd(subfd, "cache");
        close(subfd);

        avail = disk_free();
        if (avail >= free_size) {
            closedir(d);
            return 0;
        }
    }
    closedir(d);

    /* Fail case - not possible to free space */
    return -1;
}