1 Commits

Author	SHA1	Message	Date
David Teigland	e59027e4f7	devices file: back up each version ... Create backup copies of system.devices in /etc/lvm/devices/backup named system.devices-YYYYMMDD.HHMMSS.NNNN. NNNN is the version counter from the file. Each time that an lvm command writes a new system.devices file, it also writes the same file in the backup directory. A new comment line is added to system.devices with HASH=<num> where <num> is a crc calculated from the uncommented lines in system.devices. This lets lvm detect if the file has been modified outside of lvm itself. If system.devices is edited directly, the next time a command reads the file, the crc will not match the HASH value. The command will then rewrite system.devices with the correct HASH value, and create a backup reflecting the edits. A default limit of 50 backup files is kept, configurable by lvm.conf devicesfile_backup_limit (set to 0 to disable backups.)	2024-02-15 11:40:37 -06:00