Provided by: davfs2_1.5.5-1_amd64 bug

NAME

       davfs2.conf - Configuration file for mount.davfs

DESCRIPTION

       There  is  a system wide configuration file /etc/davfs2/davfs2.conf and user configuration
       files ~/.davfs2/davfs2.conf. When mount.davfs is invoked by root,  only  the  system  wide
       configuration  file is read. When invoked by an ordinary user, the user configuration file
       is read in addition. Settings from the user configuration file will take  precedence  over
       the system wide configuration.

       The  configuration  file  consists of lines where each line contains a keyword value pair.
       Keyword and value are separated by spaces and/or tabs.

       The file may contain sections that are for one specific mount point only.  Such a  section
       starts  with  a  line,  that  contains the full path of the mount point enclosed in square
       brackets. The section ends at the start of the next section or the end  of  file.  Options
       that  shall  apply to all mounted file system must come before the first sections. Options
       given in a mount specific section will have precedence.

EXAMPLE

       kernel_fs coda
       proxy     foo.bar:8080
       use_locks 0
       [/media/dav]
       use_locks 1
       [/home/otto/mywebspace]
       gui_optimize 1

       All mounted davfs2 file systems will use  the  coda  kernel  file  system  and  the  proxy
       foo.bar.  All  davfs2  file  systems  except /media/dav will disable the use of the locks.
       /home/otto/mywebspace will use the gui_optimize option.

GENERAL SYNTAX RULES

       Lines that only contain spaces and tabs (empty lines) are ignored.

       # indicates a comment. The rest of the line is ignored.

       \ is the escape character.

       "" is used for quotation.

       If a value contains one of the special characters space, tab, #, \, or ",  this  character
       must  be  escaped  by  a  preceding  \. Use ’\ ’ instead of ’ ’, ’\#’ instead of ’#’, ’\\’
       instead of ’\’ and ’\"’ instead of ’"’.

       Values containing spaces, tabs or # may instead be enclosed in double quotes.  But " and ’
       must  be  escaped even within double quotes. If the starting line of a section is enclosed
       in double quotes, the square brakets must be within  the  quotes  (like  "[/home/otto/with
       space]").

       Boolean option values (yes/no) must be given as numerical value.  0 for no, 1 for yes.

AVAILABLE CONFIGURATION OPTIONS

General Options

       dav_user
              When  invoked  by root the mount.davfs daemon will run as this user.  Value must be
              given as name, not as numerical id.
              Default: davfs2
              Only allowed in the system wide configuration file.

       dav_group
              The group of the running mount.davfs daemon. Ordinary users must be member of  this
              group  in order to mount a davfs2 file system.  Value must be given as name, not as
              numerical id.
              Default: davfs2
              Only allowed in the system wide configuration file.

       kernel_fs
              Which kernel file system to  use,  to  integrate  into  the  virtual  file  system.
              Possible values are fuse and coda.
              Default: fuse

       buf_size
              Size in KiByte of the buffer used to communicate with the kernel file system.  Only
              useful with fuse, where read and write operations may profit from a larger buffer.
              Default: 16

WebDAV Related Options

       use_proxy
              Whether to use a proxy to connect to the WebDAV server. 0 = no, 1  =  yes.   If  no
              proxy is defined in the configration file or the environment variables https_proxy,
              http_proxy and all_proxy, this option has no effect.
              Default: 1
              Only allowed in the system wide configuration file.

       proxy  Name of the proxy. The name must be the fully qualified domain name (no scheme). If
              the  proxy port differs from the default of 8080, it must be appended, separated by
              a colon. Examples: foo.bar:1704 or foo.bar
              Only allowed in the system wide configuration file.

       trust_ca_cert
              Name of a certificate file in PEM format. The name of the  file  may  be  given  as
              absolute   path  or  as  file  name  only.  In  the  latter  case  the  directories
              ~/.davfs2/certs and /etc/davfs2/certs will be searched.
              This option is useful when the  certificate  presented  by  the  server  cannot  be
              verified  using the system's data base of trusted certificate authorities (CA). The
              certificate file must contain the self-signed certificate of the top  level  CA  in
              the  chain  of  trust.  It  may  be  a self-signed server certificate (but see also
              trust_server_cert).  With this option the system's CA data base is ignored.
              Note: Even if the server's  certificate  is  trusted  that  does  not  mean  it  is
              accepted.  Additionally  the  certificate's  date  must  be  valid  and  either the
              CommonName or the SubjectAltName must match the host name of the server.

       servercert
              Same as trust_ca_cert but badly named.
              Deprecated

       trust_server_cert
              Name of a certificate file in PEM format. The name of the  file  may  be  given  as
              absolute   path  or  as  file  name  only.  In  the  latter  case  the  directories
              ~/.davfs2/certs and /etc/davfs2/certs will be searched.
              Useful when the server's certificate can't be verified or is even invalid, but  you
              know  that  you can trust this certificate.  When the server presents a certificate
              that is exactly equal to this one and when  the  server  is  able  to  authenticate
              against  the  public  key  contained  in  this  certificate  the connection will be
              established.
              This is the preferred option for self signed server certificates.
              No other ways to verify the certificate will be tried and the certificate will  not
              be checked for validity.

       clientcert
              Name  of a certificate in PKCS#12 format that will be used to authenticate with the
              server. The name of the file may be given as absolute path or as file name only. In
              the     latter     case     the     directories     ~/.davfs2/certs/private     and
              /etc/davfs2/certs/private will be searched.
              Warning: If the client certificate is issued by an intermediary CA and not by a top
              level  CA then the TLS-specification requires the client to send the complete chain
              of certificates (without the top  level  CA-certificate).  davfs2  only  sends  the
              client  certificate.  To  work  around this bug the server must store and trust the
              complete chain of CA-certificates down to  the  one  CA  that  isssued  the  client
              certificate.

       secrets
              Name  of a file that holds the credentials for servers and the proxy, and passwords
              to decrypt the client certificate. The name must be an absolute path. The file must
              be read and writable by the owner only (mode 600).
              Default: ~/.davfs2/secrets
              Only allowed in the user configuration file. The system wide secrets file is always
              /etc/davfs2/secrets.

       ask_auth
              Ask the user interactively for credentials  and  passwords  if  not  found  in  the
              secretsfile. Ask the user if a servercert cannot be verified. 0 = no, 1 = yes.
              Default: 1

       use_locks
              Whether  to lock files on the server when they are opened for writing.  0 = no, 1 =
              yes.
              Default: 1

       lock_owner
              A string send to the server to identify the owner of a lock. If a  WebDAV  resource
              is used at the same time by different clients using the same credentials, different
              values for lock_owner should be chosen.
              Default: the username from the credentials

       lock_timeout
              How long in seconds locks should be valid, before the  server  removes  them.   The
              server may ignore this and set its own timeout value.
              Default: 1800

       lock_refresh
              That  many  seconds  before the lock times out, mount.davfs will try to refresh the
              lock. The value should be substantially greater than delay_upload.
              Default: 60

       use_expect100
              To avoid  uploading big files that will be refused by the server, mount.davfs  uses
              the  header expect: 100-continue to get the o.k.  from the server before uploading.
              Not all servers understand this.  0 = no, 1 = yes.
              Default: 0

       if_match_bug
              Some servers do not handle  If-Match  and  If-None-Match-headers  correctly.   This
              otion tells mount.davfs to use HEAD instead of thes headers.  0 = no, 1 = yes.
              Default: 0

       drop_weak_etags
              Popular  servers  send a weak etag whenever they are not able to calculate a strong
              one. This weak etag will never be valid, but after one second it is silently turned
              into a strong, valid etag. With this flag set to 1, mount.davfs will never use this
              weak etags. If the flag is 0, the weakness indicator will be removed and  the  etag
              is assumed to be strong. There is some danger of the Lost-Update-Problem with this.
              But it is minimized when using locks.
              You should turn this on, when you can't use  locks  and  there  is  the  danger  of
              concurrent  access  to  the same resource. In this case the etag is not used at all
              and the resource cannot be cached.
              0 = no, 1 = yes.
              Default: 0

       n_cookies
              Some servers will only work when they are allowed to set a cookie and  this  cookie
              is  returned in subsequent requests. This option sets the number of cookies you are
              willing to accept and include in subsequent requests. davfs2 will only care for the
              name and the value of the cookie and ignore all of the possible attributes.
              Default: 0

       precheck
              If  option  if_match_bug  is  set:  use  HEAD-requests  to  check  for existence or
              modification of a file to avoid unintended overwriting what somebody else  changed.
              Has no effect if option if_match_bug is 0. You should only set it 0, if there is no
              concurrent access to the server.  0 = no, 1 = yes.
              Default: 1

       ignore_dav_header
              Some servers send wrong information about their capabilities in the DAV-header.  In
              this case the header should be ignored.
              Default: 0

       use_compression
              Use  gzip-compression  for  downloading files, if supported by the server.  Uploads
              will still be uncompressed.
              Default: 0

       min_propset
              Some servers are reported to significantly  slow  down  when  the  Etag  and  Last-
              Modified  properties  are  requested.  This  option  will reduce the set of WebDAV-
              properties requested from the server to the minimal set. Don't use it if your  file
              system  is  used for reading and writing. Without Etag or Last-Modified davfs2 will
              not be able to check for changes on the server  which  may  result  in  unnecessary
              downloads  and  lost  updates. This option will also effectively disable caching of
              files because files in the cache can't be reused.
              Default: 0

       follow_redirect
              If the server redirects a GET-request to a different resource (maybe on a different
              server) then follow this redirection.
              Currently  there  are  some  restrictions:  all  redirects are treated as temporary
              redirects; if the new server requires authentication then the same credentials  are
              use  as  for  the  original  server;  if  the  connection  is  over  TLS the server
              certificate will be checked against the trusted  CAs  known  by  the  system;  user
              configured  server  certificates  and  client certificates are not used for the new
              server.
              Default: 0

       server_charset
              When extracting file names from the path component of  the  URL,  mount.davfs  will
              assume  they  are  encoded using this character set and translate file names to the
              local character set. This is not about encoding of file contents and not about HTTP
              escaping rules.
              There  is  no  means  in HTTP to know the character encoding of the path component.
              There may be even different encodings within the same path, as the encoding of file
              names  is  often  defined by the clients that created them.  Nowadays it is best to
              use only UTF-8 encoding and to do no conversion. If  you  are  not  sure  that  all
              clients  understand  UTF-8,  restrict  file  names  to  pure  us-ascii.  Never  use
              characters in file names, that may  have  a  special  function  on  some  operating
              systems (like /, : and \).
              Default: no character set conversion

       connect_timeout
              When  creating  a  TCP  connection  to  the  server mount.davfs will wait that many
              seconds for an answer before assuming an error. If a value of '0' is used  then  no
              explicit timeout handling is set and the connect call will only timeout as dictated
              by the TCP stack.
              This parameter only takes effect if the version of neon  in  use  (neon  version  >
              0.26) and the OS support non-blocking I/O.
              Default: 10

       read_timeout
              How  long  in  seconds  mount.davfs  will wait for an answer from the server before
              assuming an error.
              Default: 30

       retry  When mount.davfs can not reach the server it will try again  after  retry  seconds.
              For subsequent retries the interval will be increased up to max_retry seconds.
              Default: 30

       max_retry
              Maximum value of the retry interval.
              Default: 300

       max_upload_attempts
              When  uploading  a  changed  file  fails  temporarily  mount.davfs  will retry with
              increasing intervals, but not more often than this.
              With a bad connection this will cause additional traffic. To reduce traffic  caused
              by  unsuccessful attempts option use_expect100 can be set. But please test it. Most
              proxies and some servers don't support this header.
              Default: 15

       add_header
              Your server might expect special headers to do what you want. Different from  other
              options,  this  one  takes  two values: the name of the header and its value.  Some
              ASP-backends to IIS seem to require the Microsoft specific header  "Translate:  F".
              You can add it like this:
              add_header Translate F
              mount.davfs will add header "Translate: F" on all requests.
              This option is cumulative. You can enter more than one add_header option and all of
              them will be  added.  Also  add_header  options  from  /etc/davfs2/davfs2.conf  and
              ~/.davfs2/davfs2.conf are merged.

Cache Related Options

       backup_dir
              Each  mounted  davfs2  file  system  has a directory to store backups of files that
              could not be stored back to the server. This sets the name of this  directory.  You
              should regularly check this directory.
              Default: lost+found

       cache_dir
              The  directory  where  mount.davfs will store cached files. For every mount point a
              subdirectory will be created.
              In the systemwide configuration file this will set the system wide cache,  used  by
              root. In a users configuration file it will set the cache used by this user.
              Defaults: /var/cache/davfs2 and ~/.davfs2/cache

       cache_size
              The  amount  of disk space in MiByte that may be used. mount.davfs will always take
              enough space to cache open files, ignoring this value if necessary.
              Default: 50

       table_size
              mount.davfs maintains a hash table with an entry for each known file or  directory.
              This  gives  the number of entries in this table. For large file systems (more than
              some hundreds of files) increasing this number may speed up  file  operations.  The
              value should be a power of 2.
              Default: 1024

       dir_refresh
              After  mount.davfs  has  got information about files in a directory it considers it
              valid for this time in seconds. Note: This does not affect  opening  of  files  and
              reading a directory by an application.
              Default: 60

       file_refresh
              When  a file or directory is opened by an application, mount.davfs will first check
              the server for a newer version. But some applications do open  calls  on  the  same
              file  in  short  sequence.  To avoid unnecessary traffic mount.davfs will wait that
              many seconds before it send a new request for the same information.
              Default: 1

       delay_upload
              When a file that has been changed  is  closed,  mount.davfs  will  wait  that  many
              seconds  before  it  will  upload  it  to  the server. This will avoid uploading of
              temporary files that will be removed immediately after closing.  If  you  need  the
              files to appear on the server immediately after closing, set this option to 0.
              Default: 10

       gui_optimize
              When a file is opened, mount.davfs will have to check the server whether there is a
              newer version. Graphical User Interfaces tend to open just any file,  slowing  down
              things  dramatically  for large directories.  With this option mount.davfs will try
              to get this information from all files in a directory with one PROPFIND request.  0
              = no, 1 = yes.
              Default: 0

       minimize_mem
              davfs2 holds information about files and directories in the working memory. It will
              stay there as long as the file system is mounted and the file is  not  deleted.  By
              this memory usage by davfs2 will grow over time and may slow down davfs2. With this
              option set to 1 davfs2 will regularly clean the memory from  information  that  has
              not be used for some time.  0 = no, 1 = yes.
              Warning:  Most  file  attributes  are  only  maintained locally because there is no
              corresponding WebDAV property. So if users change attributes (owner, group,  access
              bits)  locally  this changes will be lost and attribute values will be reset to the
              default values.
              Default: 0

Debugging Options

       debug  Send debug messages to the syslog daemon. The value tells what kind of  information
              shall  be  logged.  The  messages  are  send  with facility LOG_DAEMON and priority
              LOG_DEBUG. It depends from  the  configuration  of  the  syslog  daemon  where  the
              messages     will    go    (propably    /var/log/messages,    /var/log/syslog    or
              /var/log/daemon.log). Whether HTTP related debug messages are available depends  on
              your neon library.
              Unlike other options, this option is cumulative. If there are several debug entries
              with different values, all of  them  will  be  applied.  Also  debug  options  from
              /etc/davfs2/davfs2.conf and ~/.davfs2/davfs2.conf are merged.
              Note:  Debug  messages  let  the  log-files  grow quickly. Never use this option in
              normal operation of mount.davfs.
              Default: no debugging messages

              Recognized values:

              config Command line and configuration options.

              kernel Upcalls from the kernel file system.

              cache  Cache operations like adding and removing nodes.

              http   HTTP headers.

              xml    Parsing of the XML-body of WebDAV-requests.

              httpauth
                     Negotiation of authentication.

              locks  Information about locks.

              ssl    TLS/SSL related stuff like certificates.

              httpbody
                     Complete body of HTTP-responses.

              secrets
                     Also print confidential information, which is usually omitted or obscured.

              most   Includes config, kernel, cache and http.

AUTHORS

       This man page was written by by Werner Baumann <werner.baumann@onlinehome.de>.

DAVFS2 HOME

       http://savannah.nongnu.org/projects/davfs2

SEE ALSO

       mount.davfs(8), umount.davfs(8), mount(8), umount(8), fstab(5)