Provided by: dirvish_1.2.1-1.3_all bug


       dirvish - Disk based virtual image network backup system


       dirvish --vault vault [ OPTIONS ]


       Create a backup image of a client directory tree.

       Each  image  is  a directory containing transfer log, summary, tree and if transfer errors
       were detected an rsync_error file.  The transfer log retains the the output of any pre and
       post  processing  commands  and the rsync log listing all files that were changed or added
       with some statistical information.  The summary file contains all  the  information  about
       how  the  image  was  created  and meta-data for managing the image in config file format.
       Tree is the copy of the client tree.

       The client directory tree is compared with an  existing  image  to  create  a  new  image.
       Unchanged  files  are  shared  between  images.   For  changed files only those parts that
       actually change are transfered over the network.  Unchanged portions of files  are  copied
       from the reference image.

       The  resulting  images  contain complete copies of the original trees preserving ownership
       and file permissions.  In this way even though the backups are  made  incrementally,  each
       image can be used independently for restores or to make removable-media off-site copies or

       The removal of an image will have no effect on other images.


       Each option on the command line may be specified any number of times.  Those options  that
       support  lists  in  the config files will accumulate all of their arguments otherwise each
       specification will override the ones before.

       As configuration files are loaded they may override options on the command line.

       Each option may be unambiguously abbreviated.

       --branch [vault:]branch_name
              Specify a branch to use.

              A branch is a sequence of images.

              If a vault has been specified either here or  with  --vault  the  first  time  this
              option   is   used  it  will  attempt  to  load  the  config  file  branch_name  or
              branch_name.conf from the vault.

       --config config-file
              Load options from the specified file.

              If this precedes --vault the --vault option will not load it's own config file.

              If vault has been set and config-file is a bare filename the presence of one in the
              vault  will  take  precedence over one in the current directory.  To specify one in
              the current directory after --vault use ./ to precede the name.

              The master configuration file will be read prior to processing options.

       --expire expire_date
              Specify a time for the image to expire.

              See Time::ParseDate(3pm) for details.

              This does not actually expire anything.  What it does do is add an Expire: field to
              the  image  summary  file  containing  an absolute time so that a dirvish-expire or
              another tool outside of dirvish can decide when to remove old images.

       --image image_name
              Specify a name for the image.

              image_name is passed through POSIX::strftime

              See strftime(3) for details.

       --image-time parsedate_expression
              Time to use when creating the image name.

              If an absolute time without a date is provided it will be forced into the past.  If
              this isn't set the current time will be used.

              See Time::ParseDate(3pm) for details.

       --init Create an initial image.

              Create  the  image  entirely  from  the  source tree without the use of a reference


              Don't actually do anything.

              Process   all   configuration   files,   options   and   tests   then   produce   a
              summary/configuration file on standard output and exit.

       --reference branch_name|image_name
              Specify an existing image or a branch from which to create the new image.

              If  a  branch_name is specified, the last existing image from its history file will
              be used.  A branch will take precedence over an image of the same name.

       --reset option
              Reset the values in an accumulating option.

       --summary  short|long
              Specify summary format.

              A short summary will only include final used values.  A long summary  will  include
              all configuration values.

              Default value: short

       --vault vault[:branch_name]
              Specify the vault to store the image in.

              If  not  preceeded by --config this will attempt to load the config file default or
              default.conf within the vault.

              If branch_name is specified here this will behave exactly like the --branch  option
              and branch_name or branch_name.conf will be attempted instead of default.conf.

              Print version string and exit.


       To  facilitate  further  automation  and  integration  of dirvish with other tools dirvish
       provides rationalised exit codes.  The exit codes are range based.  While the code  for  a
       specific  error may change from one version to another it will remain within the specified
       range.  So don't test for specific exit codes but instead test for a range of values.   To
       the degree possible higher value ranges indicate more severe errors.

       0      success

       1-19   The backup job reported warnings.

       20-39  An error occurred during index generation and cleanup.

       40-49  A post-client or post-server command could not be run.

       50-59  The post-client command reported an error.  Its exit code modulo 10 is added to 50

       60-69  The post-server command reported an error.  Its exit code modulo 10 is added to 60

       70-79  A post-client or post-server command could not be run.

       80-89  The pre-server command reported an error.  Its exit code modulo 10 is added to 80

       90-99  The pre-server command reported an error.  Its exit code modulo 10 is added to 90

              Rsync encountered a non-fatal error.

              Rsync encountered a fatal error.

              An error was encountered in loading a configuration file.

              An error was detected in the configuration.

       255    Incorrect usage.


              alternate master configuration file.

              master configuration file.

              client configuration file.

              default vault configuration file.

              branch configuration file.

              branch history file.

              image creation summary.

              image creation log.

              actual image of source directory tree.

              Error output from rsync if errors or warnings were detected.




       Dirvish was created by J.W. Schultz of Pegasystems Technologies.


       Fields  set  in  configuration files will override command line options that have been set
       before the file is read.  This behaviour while consistent may occasionally  confuse.   For
       this reason most command line options should be specified after any options that may cause
       a configuration file to be loaded.

       In order to preserve permissions it is necessary for dirvish to run as root on the  backup

       The  root  user  must  have  non-interactive  ssh access to the client systems.  It is not
       necessary that this access be as the root user on the client.

       File ownership is preserved using numeric values so it  is  not  necessary  to  have  user
       accounts  on the backup server.  Making the vaults network accessible using protocols that
       map UIDs based on names instead of number could allow  access  controls  on  files  to  be

       Making  the  vaults  writable  by  users  will  compromise  the  integrity of the backups.
       Therefore any access to the vaults by users should be done through a read-only mount.