int guac_rdp_fs_append_filename()

in src/protocols/rdp/fs.c [752:812]

• 29 lines of code
• 13 McCabe index (conditional complexity)

int guac_rdp_fs_append_filename(char* fullpath, const char* path,
        const char* filename) {

    int i;

    /* Disallow "." as a filename */
    if (strcmp(filename, ".") == 0)
        return 0;

    /* Disallow ".." as a filename */
    if (strcmp(filename, "..") == 0)
        return 0;

    /* Copy path, append trailing slash */
    for (i=0; i<GUAC_RDP_FS_MAX_PATH; i++) {

        /*
         * Append trailing slash only if:
         *  1) Trailing slash is not already present
         *  2) Path is non-empty
         */

        char c = path[i];
        if (c == '\0') {
            if (i > 0 && path[i-1] != '/' && path[i-1] != '\\')
                fullpath[i++] = '/';
            break;
        }

        /* Copy character if not end of string */
        fullpath[i] = c;

    }

    /* Append filename */
    for (; i<GUAC_RDP_FS_MAX_PATH; i++) {

        char c = *(filename++);
        if (c == '\0')
            break;

        /* Filenames may not contain slashes */
        if (c == '\\' || c == '/')
            return 0;

        /* Append each character within filename */
        fullpath[i] = c;

    }

    /* Verify path length is within maximum */
    if (i == GUAC_RDP_FS_MAX_PATH)
        return 0;

    /* Terminate path string */
    fullpath[i] = '\0';

    /* Append was successful */
    return 1;

}