int silc_file_writefile(const char *filename, const char *buffer, uint32 len);
int silc_file_writefile_mode(const char *filename, const char *buffer,
uint32 len, int mode);
int silc_file_writefile(const char *filename, const char *buffer, uint32 len);
int silc_file_writefile_mode(const char *filename, const char *buffer,
uint32 len, int mode);