VQ%@sddlmZmZddlZddlZddlZddlZddlZddlZGddde Z Gddde Z Gddde Z Gd d d e ZGd d d eZGd dde ZGddde ZdS))print_functionunicode_literalsNc@seZdZdS)AptBtrfsSnapshotErrorN)__name__ __module__ __qualname__rr@/usr/lib/python3/dist-packages/DistUpgrade/apt_btrfs_snapshot.pyrs rc@seZdZdS)AptBtrfsNotSupportedErrorN)rrrrrrr r !s r c@seZdZdS)AptBtrfsRootWithNoatimeErrorN)rrrrrrr r %s r c@sFeZdZdZeddZddddZddZd S) FstabEntryz a single fstab entry line cCs-|jddj}t|ddS)N#r) partitionsplitr )clslineargsrrr from_line+szFstabEntry.from_linercCs:||_||_||_||_||_||_dS)N)fs_spec mountpointfstypeoptionsdumppassno)selfrrrrrrrrr __init__3s      zFstabEntry.__init__cCs,d|j|j|j|j|j|jfS)Nz*)rrrrrr)rrrr __repr__<szFstabEntry.__repr__N)rrr__doc__ classmethodrrrrrrr r )s  r cs+eZdZdZdfddZS)Fstabz a list of FstabEntry items z /etc/fstabcstt|jt|~}xtdd|DD]_}|dks6|jdr]q6nytj|}Wntk rw6YnX|j|q6WWdQXdS)Ncss|]}|jVqdS)N)strip).0lrrr Hsz!Fstab.__init__..r ) superr ropen startswithr r ValueErrorappend)rfstabZ fstab_filerentry) __class__rr rDs zFstab.__init__)rrrrrrr)r-r r Bs r c@sFeZdZdZddZddZddZdd Zd S) LowLevelCommandszi lowlevel commands invoked to perform various tasks like interact with mount and btrfs tools cCs"tjd||g}|dkS)Nmountr) subprocesscall)rrrretrrr r/VszLowLevelCommands.mountcCstjd|g}|dkS)Numountr)r0r1)rrr2rrr r3ZszLowLevelCommands.umountcCs(tjddd||g}|dkS)Nbtrfs subvolumesnapshotr)r0r1)rsourcedestr2rrr btrfs_subvolume_snapshot^sz)LowLevelCommands.btrfs_subvolume_snapshotcCs%tjddd|g}|dkS)Nr4r5Zdeleter)r0r1)rr6r2rrr btrfs_delete_snapshotcsz&LowLevelCommands.btrfs_delete_snapshotN)rrrrr/r3r9r:rrrr r.Rs    r.c@seZdZdZdZedZdddZddZd d Zdd d Z d dZ ddZ ddZ dddZ dddZddZddZddZdd Zd!d"Zd#d$d%Zd&d'Zd(S))AptBtrfsSnapshotz? the high level object that interacts with the snapshot system z@apt-snapshot-z old-root-z /etc/fstabcCs(t||_t|_d|_dS)N)r r+r.commands_btrfs_root_mountpoint)rr+rrr rps zAptBtrfsSnapshot.__init__cCs,tjjdsdS|j}|dk S)zx verify that the system supports apt btrfs snapshots by checking if the right fs layout is used etc z /sbin/btrfsFN)ospathexists%_get_supported_btrfs_root_fstab_entry)rr,rrr snapshots_supportedus z$AptBtrfsSnapshot.snapshots_supportedcCsIxB|jD]7}|jdkr |jdkr d|jkr |Sq WdS)z4 return the supported btrfs root FstabEntry or None /r4zsubvol=@N)r+rrr)rr,rrr rAs z6AptBtrfsSnapshot._get_supported_btrfs_root_fstab_entrycCs.x'|jD]}|j|kr |jSq WdS)z4 return the device or UUID for the given mountpoint N)r+rr)rrr+r,rrr _uuid_for_mountpoints z%AptBtrfsSnapshot._uuid_for_mountpointcCsJ|jd}tjdd}|jj||s:dS||_|jS)NrCprefixzapt-btrfs-snapshot-mp-)rDtempfileZmkdtempr<r/r=)rZuuidrrrr mount_btrfs_root_volumes  z(AptBtrfsSnapshot.mount_btrfs_root_volumecCs2|jj|j}tj|jd|_|S)N)r<r3r=r>rmdir)rresrrr umount_btrfs_root_volumes z)AptBtrfsSnapshot.umount_btrfs_root_volumecCs(tjjjddjtdS)NZ microsecondr_)datetimenowreplaceZ isoformatstr)rrrr _get_now_strszAptBtrfsSnapshot._get_now_strr%cCsd|j}|j}|jjtjj|dtjj||j||}|j|S)N@) rGrPr<r9r>r?join SNAP_PREFIXrJ)rZadditional_prefixmpZsnap_idrIrrr create_btrfs_root_snapshots   # z+AptBtrfsSnapshot.create_btrfs_root_snapshotrcCsg}|dkrN|j}|s0tnd|jkrNtqNn|dkritj}n|j}xotj|D]^}|j|j rtj j tj j ||dd}||kr|j |qqqW|j|S)z get the list of available snapshot If "older_then" is given (in unixtime format) it will only include snapshots that are older then the given date) rZnoatimeetcr+)rAr rr timerGr>listdirr(rSr?getatimerRr*rJ)r older_thanr#r,rTeZatimerrr get_btrfs_root_snapshots_lists"     '  z.AptBtrfsSnapshot.get_btrfs_root_snapshots_listcCs'tdtdj|jdS)NzAvailable snapshots:z T)printrRr\)rrrr print_btrfs_root_snapshotss z+AptBtrfsSnapshot.print_btrfs_root_snapshotscCsTtj}|jds*tdnt|dd}||dddS)Ndz&Please specify time in days (e.g. 10d)<)rWendswith Exceptionint)rtimefmtrMZdaysrrr _parse_older_than_to_unixtimes  z.AptBtrfsSnapshot._parse_older_than_to_unixtimec Csm|j|}y1td|tdj|jd|Wn&tk rhtjjddSYnXdS)Nz$Available snapshots older than '%s':z rZz6Error: fstab option 'noatime' incompatible with optionFT)rhr]rRr\r sysstderrwrite)rrgolder_than_unixtimerrr %print_btrfs_root_snapshots_older_thans  z6AptBtrfsSnapshot.print_btrfs_root_snapshots_older_thanc Csvd}|j|}y4x-|jd|D]}||j|M}q+WWn&tk rqtjjddSYnX|S)NTrZz6Error: fstab option 'noatime' incompatible with optionF)rhr\delete_snapshotr rirjrk)rrgrIrlZsnaprrr %clean_btrfs_root_snapshots_older_thans    z6AptBtrfsSnapshot.clean_btrfs_root_snapshots_older_thancCs|j|}|S)N) set_default)r snapshot_namerIrrr command_set_defaultsz$AptBtrfsSnapshot.command_set_defaultTcCs|j}tjj||}tjj|r|jdr|dkrtjj|d}tjj||j|j}tj||tj||t d|n t d|j dS)z set new default rQz@Default changed to %s, please reboot for changes to take effect.z_You have selected an invalid snapshot. 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