void getline(char *string, int lim);
int file_checksum(char *filename);
void do_edit(char *desc, char *read_cmd, char *check_cmd, char *write_cmd);
void getline(char *string, int lim);
int file_checksum(char *filename);
void do_edit(char *desc, char *read_cmd, char *check_cmd, char *write_cmd);