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dar_manager: disk archive manager

dar_manager - disk archive manager


dar_manager [-v] [-j] -C [<path>/]<database> dar_manager [-v] [-j] -B [<path>/]<database> -A [<path>/]<basename> [ [<path>/]<archive_basename>] dar_manager [-v] [-j] -B [<path>/]<database> -l dar_manager [-v] [-j] -B [<path>/]<database> -D <number>[-<number>] dar_manager [-v] [-j] -B [<path>/]<database> -b <number> <new_archive_basename> dar_manager [-v] [-j] -B [<path>/]<database> -p <number> <path> dar_manager [-v] [-j] -B [<path>/]<database> -o [list of options to pass to dar] dar_manager [-v] [-j] -B [<path>/]<database> -d [<path to dar command>] dar_manager [-v] [-j] -B [<path>/]<database> [-w <date>] [-e <extra options to dar>] -r [list of files to restore] dar_manager [-v] [-j] -B [<path>/]<database> -u <number> dar_manager [-v] [-j] -B [<path>/]<database> -f file dar_manager [-v] [-j] -B [<path>/]<database> -s dar_manager [-v] [-j] -B [<path>/]<database> -m <number> <number> dar_manager [-v] [-j] -B [<path>/]<database> -i dar_manager -h dar_manager -V


dar_manager is part of the Disk Archive suite. Its purpose is to simplify the restoration of a set of few files present in many backup, full or differential. This is achieved by gathering the catalogue of each archive (this has to be done once). At any time you just have to give the relative path to the files you want to restore, dar_manager will call dar with the proper options and restore the last version of each file (or the last version before given date). Note that dar_manager is to be used when you have remove some files by accident some time ago and wish to recover them. It thus not adapted to restore the state a directory tree had at a given time, in particular when some files have to be removed. For that you must use dar directly with the corresponding archive to the date for which you wish to restore the state. you can restore any file by hand without dar_manager , but if you make a lot of differential backup, you may spend many time to find the archive that contains the last version of your file, as dar will not save it if it has not changed since previous backup. dar_manager simplify the process by looking in its internal database, built from archive "catalogues".


-C, --create [<path>/]<database> creates an empty database that will collect informations about several archives. The <database> is a filename that is required for -B option. To destroy a <database> just remove the file. -B, --base [<path>/]<database> specify the database to read or modify. The <database> file must exist, and have a database structure (see -C option). -i, --interactive use a keyboard interactive text menu to do operations on the given database. So you may avoid reading the other options described in this manual page, if you wish, and just use the interactive option. You will however always have to create an empty database (-C option) and restore files manually (-r option). -A, --add [<path>/]<basename> [ [<path>/]<archive_basename>] add an archive to the database. An isolated catalogue can also be used only if it has been produced by dar version 1.2.0 or above. Why ? Because, an isolated catalogue produced by older version will always tell that no files are saved in the archive of reference, in that case the solution is to provide the archive itself as argument. An optional second argument is the basename of the archive if it is different from the first argument (need for extraction of files). For example you could have an isolated catalogue in first argument and the basename of the original archive (where is stored the data) as second argument. By default, dar_manager will look for an archive of reference in the command line used to create each archive, but in some cases, it may be necessary to specify the archive name (for example if you've changed its name). -l, --list displays the informations about the archives compiled in the database. In particular, a number is given to each archive, which is required to some other option to design a particular archive within the database. Nothing avoids you to feed the database with several archive of the same basename ! You will just have to guess which one is asked under this name. :-) -D, --delete <number>[-<number>] removes an archive (or a range of archive) from the database. The number of the archive (or the min and max number or the archive range) is correspond to those given by the -l option. Note that all archive number greater than the one(s) to be delete will be decremented to keep continuous numbering of the archive inside the database. -b, --base <number> <new_archive_basename> this option allows you to rename the archive basename (used when restoring files from it) -p, --path <number> <path> this option allows you to change the location of a given archive (used when restoring files from it) -o, --options [list of option to pass to dar] Specify the option to use when calling dar. Each call erases the previous setting. Possible dar options are all the available ones except "-x" and simple arguments (the [list of path]) which will be added by dar_manager itself. -d, --dar [<path>] Set the path to dar. If no argument is given, dar is expected to be located in the PATH -r, --restore [list of files to restore] dar_manager will restore all (an only) the given files, asking for the proper archive only. Last version of each file over several archive is based on the modification time of the inode, thus if you have a more recent backup that contains an old version of a given file, a older archive could be used to restore the file, if its last modification time (mtime) is more recent. Note that files listed after -r option, must never have an absolute path. They will be restored under the directory specified with -R option of dar (thus using -o option), or by default, in subdirectories of the current directory. -w, --when <date> alters the -r option behavior: still restores the files in the most recent version available but only before the given date (versions of more recent dates are ignored). The <date> must respect the following format [ [ [year/]month/]day-]hour:minute[:second]. For example "22:10" for 10 PM past 10 or the current day, "7-22:10" for 10 PM past 10 the 7th of the current month, "3/07-22:10" for the 7th of march at 22:10 of the current year, "2002/03/31-14:00:00" the date of the first dar's release ;-). The given date must be in the past, of course, and is compared to the "last modification" date of the saved files and not to the date at which archives have been done. Thus if a file has been changed long ago but saved in a recent (full) archive, it will be elected for restoration even for dates older than the creation of the archive. In the other way, a file saved long time ago with a mtime that was set to a date in the future will not be elected for restoration when giving the date at which was done the archive. -e, --extra <options> pass some more options to dar. While the -o options takes all that follows on the command line as argument to pass to dar and write these in the database, the -e option does not alter the database and has only one argument. In other words, if you need to pass several options to dar through the use of the -e option, you need to use quotes (simple quotes ' or double quotes ") to enclose these options. Example: dar_manager -B database.dmd -e "-w -v -p -b -r -H 1" -r some/files -u, --used <number> list the files that the given archive owns as last version available. Thus when no file is listed, the given archive is no more useful in database, and can be removed safely (-D option). If <number> is zero, all available file are listed. -f, --file <file> displays in which archive the given file is saved, and what are the modification date (mtime) and change date (ctime). -s, --stats show the number of most recent files by archive. This helps to determine which archive can be safely removed from the database. -m, --move <number> <number> changes the order of archives in the database. The first number is the number of the archive to move, while the second is the place where it must be shifted. Archie order is important only in the case a file to be restored has EA that has been saved in an archive and data saved in another archive. This takes place when making a differential backup for file that have no change in data but changes in EA. In that case, the database must be fed (-A option) with archive in the order they have been created. If dar_manager detects such a disorder, it issues a warning is giving the name of the file that could not be restored properly (only EA have not been restored with the last version). Note that, if you don't use EA the order of archives in the database has no importance. -Q Do not display any message on stderr when not launched from a terminal (for example when launched from an at job or crontab). Remains that any question to the user will be assumed a 'no' answer, which most of the time will abort the program. -j, --jog when virtual memory is exhausted, as user to make room before trying to continue. By default, when memory is exhausted dar aborts. -v, --verbose displays additional information about what it is doing. -h, --help display help usage -V, --version display software version


dar_manager exits with the following code: 0 Operation successful. 1 see dar manual page for signification 2 see dar manual page for signification 3 see dar manual page for signification 7 see dar manual page for signification 8 see dar manual page for signification 11 and above dar called from dar_manager has exited with non zero status. Substract 10 to this exit code to get dar's exit code.
dar_manager acts like dar (see dar man page for list of signals), upon certain signal reception dar aborts cleanly
dar(1), dar_xform(1), dar_slave(1), dar_cp(1)


at most 65534 archives can be compiled in a given database, which should be enough for most users. Dar_manager does not support encrypted archives for now and archive cannot neither be encrypted. See the FAQ for a workaround.


none actually


//dar.linux.free.fr/ Denis Corbin France Europe DAR_MANAGER(1)

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