Describes the format of the dumpdates file.
The /etc/dumpdates file holds filesystem backup information for the backup and rdump commands. The dumpdates file is maintained by using the -u option when performing file system backups. The following is the dumpdates data structure:
struct  idates {
        char    id_name[MAXNAMLEN+3];
        char    id_incno;
        time_t  id_ddate;
}
The struct idates describes an entry in the /etc/dumpdates file where the backup history is kept. The fields of the structure are:
| Item | Description | 
|---|---|
| id_name | The name of the file system. | 
| id_incno | The level number of the last backup. | 
| id_ddate | The date of the incremental backup in system format. | 
| MAXNAMLEN | The maximum value of this variable is 255. | 
| Item | Description | 
|---|---|
| /etc/dumpdates | Specifies the path name of the symbolic link to the dumpdates file. |