Provided by: nmh_1.3-1build1_amd64 bug


       mhstore - store contents of MIME messages into files


       mhstore [+folder] [msgs] [-file file] [-part number] ...  [-type content] ...  [-auto |
            -noauto] [-verbose | -noverbose] [-rcache policy] [-wcache policy] [-check |
            -nocheck] [-version] [-help]


       The mhstore command allows you to store the contents of a collection of MIME (multi-media)
       messages into files or other messages.

       mhstore manipulates multi-media messages as specified in RFC-2045 thru RFC-2049.

       By default, mhstore will store all the parts of each message.  Each part will be store  in
       a separate file.  The header fields of the message are not stored.  By using the -part and
       -type switches, you may limit the scope of mhstore to particular subparts (of a  multipart
       content) and/or particular content types.

       The  option  -file  file  directs mhstore to use the specified file as the source message,
       rather than a message from a folder.  If you specify this file as “-”, then  mhstore  will
       accept  the  source  message  on  the  standard  input.  Note that the file, or input from
       standard input should be a validly formatted message, just like any other nmh message.  It
       should  NOT  be  in mail drop format (to convert a file in mail drop format to a folder of
       nmh messages, see inc(1)).

       A part specification consists of a series of numbers separated by dots.  For example, in a
       multipart  content  containing  three  parts,  these  would  be  named  as  1,  2,  and 3,
       respectively.  If part 2 was also a multipart content containing two parts, these would be
       named  as  2.1  and  2.2,  respectively.  Note that the -part switch is effective for only
       messages containing a multipart content.  If a message has some other kind of content,  or
       if  the  part  is  itself another multipart content, the -part switch will not prevent the
       content from being acted upon.

       A content specification consists of a content type and a subtype.   The  initial  list  of
       “standard” content types and subtypes can be found in RFC-2046.

       A list of commonly used contents is briefly reproduced here:

            Type         Subtypes
            ----         --------
            text         plain, enriched
            multipart    mixed, alternative, digest, parallel
            message      rfc822, partial, external-body
            application  octet-stream, postscript
            image        jpeg, gif, png
            audio        basic
            video        mpeg

       A legal MIME message must contain a subtype specification.

       To  specify  a content, regardless of its subtype, just use the name of the content, e.g.,
       “audio”.   To  specify  a  specific  subtype,  separate  the  two  with  a  slash,   e.g.,
       “audio/basic”.   Note that regardless of the values given to the -type switch, a multipart
       content (of any subtype listed above) is always acted upon.   Further  note  that  if  the
       -type  switch is used, and it is desirable to act on a message/external-body content, then
       the -type switch must be used twice: once  for  message/external-body  and  once  for  the
       content externally referenced.

   Checking the Contents
       The  -check  switch  tells  mhstore to check each content for an integrity checksum.  If a
       content has such a checksum (specified as a Content-MD5 header field), then  mhstore  will
       attempt to verify the integrity of the content.

   Storing the Contents
       The  mhstore  will  store the contents of the named messages in “native” (decoded) format.
       Two things must be determined: the directory to store  the  content,  and  the  filenames.
       Files are written in the directory given by the “nmh-storage” profile entry, e.g.,

            nmh-storage: /tmp

       If this entry isn't present, the current working directory is used.

       If  the -auto switch is given, then mhstore will check if the message contains information
       indicating the filename that should be used to store the content.  This information should
       be specified as the attribute “name=filename” in the “Content-Type” header for the content
       you are storing.  For security reasons, this filename will be ignored if  it  begins  with
       the character '/', '.', '|', or this switch is not the default, and it is recommended that
       you do NOT put the -auto switch in your .mh_profile file.

       If the -auto switch is not given (or is being ignored for security reasons)  then  mhstore
       will  look  in the user's profile for a “formatting string” to determine how the different
       contents should be stored.  First, mhstore will look for an entry of the form:


       to determine the formatting string.  If this isn't found, mhstore will look for  an  entry
       of the form:


       to determine the formatting string.

       If  the formatting string starts with a “+” character, then content is stored in the named
       folder.  A formatting string consisting solely of a “+” character is interpreted to be the
       current folder.

       If  the  formatting string consists solely of a “-” character, then the content is sent to
       the standard output.

       If the formatting string starts with a '|', then  the  display  string  will  represent  a
       command  for  mhstore  to  execute which should ultimately store the content.  The content
       will be passed to the standard input of the command.   Before  the  command  is  executed,
       mhstore  will  change  to  the appropriate directory, and any escapes (given below) in the
       display string will be expanded.

       Otherwise the formatting string will represent a pathname in which to store  the  content.
       If  the  formatting  string starts with a '/', then the content will be stored in the full
       path given, else the file name will be relative to  the  value  of  “nmh-storage”  or  the
       current  working directory.  Any escapes (given below) will be expanded, except for the a-

       A command or pathname formatting string may contain the following escapes.  If the content
       isn't  part  of  a  multipart  (of  any  subtype  listed above) content, the p-escapes are

            %a  Parameters from Content-type  (only valid with command)
            %m  Insert message number
            %P  Insert part number with leading dot
            %p  Insert part number without leading dot
            %t  Insert content type
            %s  Insert content subtype
            %%  Insert character %

       If no  formatting  string  is  found,  mhstore  will  check  to  see  if  the  content  is
       application/octet-stream  with  parameter  “type=tar”.   If  so,  mhstore  will  choose an
       appropriate filename.  If the content is not application/octet-stream, then  mhstore  will
       check  to  see  if the content is a message.  If so, mhstore will use the value “+”.  As a
       last resort, mhstore will use the value “%m%P.%s”.

       Example profile entries might be:

            mhstore-store-text: %m%P.txt
            mhstore-store-text: +inbox
            mhstore-store-message/partial: +
            mhstore-store-audio/basic: | raw2audio -e ulaw -s 8000 -c 1 >
            mhstore-store-image/jpeg: %m%P.jpg

   Reassembling Messages of Type message/partial
       mhstore is also able to reassemble messages that have been split into multiple messages of
       type “message/partial”.

       When asked to store a content containing a partial message, mhstore will try to locate all
       of the portions and combine them accordingly.  The default is to store the combined  parts
       as  a  new  message  in  the current folder, although this can be changed using formatting
       strings as discussed above.  Thus, if someone has sent you  a  message  in  several  parts
       (such  as  the  output  from  sendfiles), you can easily reassemble them all into a single
       message in the following fashion:

            % mhlist 5-8
             msg part  type/subtype             size description
               5       message/partial           47K part 1 of 4
               6       message/partial           47K part 2 of 4
               7       message/partial           47K part 3 of 4
               8       message/partial           18K part 4 of 4
            % mhstore 5-8
            reassembling partials 5,6,7,8 to folder inbox as message 9
            % mhlist -verbose 9
             msg part  type/subtype             size description
               9       application/octet-stream 118K
                         (extract with uncompress | tar xvpf -)

       This will store exactly one message, containing the sum of the parts.  It  doesn't  matter
       whether the partials are specified in order, since mhstore will sort the partials, so that
       they are combined in the correct order.  But if  mhstore  can  not  locate  every  partial
       necessary to reassemble the message, it will not store anything.

   External Access
       For contents of type message/external-body, mhstore supports these access-types:

       ·   afs

       ·   anon-ftp

       ·   ftp

       ·   local-file

       ·   mail-server

       For  the  “anon-ftp”  and  “ftp”  access types, mhstore will look for the “nmh-access-ftp”
       profile entry, e.g.,


       to determine the pathname of a program to perform the  FTP  retrieval.   This  program  is
       invoked with these arguments:

            domain name of FTP-site
            remote directory
            remote filename
            local filename
            “ascii” or “binary”

       The  program  should terminate with an exit status of zero if the retrieval is successful,
       and a non-zero exit status otherwise.

       If this entry is not provided, then mhstore will use  a  simple  built-in  FTP  client  to
       perform the retrieval.

   The Content Cache
       When  mhstore  encounters an external content containing a “Content-ID:” field, and if the
       content allows caching, then depending on the caching behavior  of  mhstore,  the  content
       might be read from or written to a cache.

       The caching behavior of mhstore is controlled with the -rcache and -wcache switches, which
       define the policy for reading from, and writing to, the cache, respectively.  One of  four
       policies  may  be  specified:  “public”,  indicating  that  mhstore  should  make use of a
       publically-accessible content cache; “private”, indicating that mhstore should make use of
       the  user's  private content cache; “never”, indicating that mhstore should never make use
       of caching; and, “ask”, indicating that mhstore should ask the user.

       There are two directories where contents may be  cached:  the  profile  entry  “nmh-cache”
       names a directory containing world-readable contents, and, the profile entry “nmh-private-
       cache” names a directory containing private contents.  The former should  be  an  absolute
       (rooted) directory name.

       For example,

            nmh-cache: /tmp

       might be used if you didn't care that the cache got wiped after each reboot of the system.
       The latter is interpreted relative to the user's nmh directory, if not rooted, e.g.,

            nmh-private-cache: .cache

       (which is the default value).

   User Environment
       Because the display environment in which mhstore operates may vary for different machines,
       mhstore  will  look for the environment variable If present, this specifies the name of an
       additional user profile which should be read.  Hence, when a user logs in on a  particular
       machine, this environment variable should be set to refer to a file containing definitions
       useful for that machine.  Finally, mhstore will attempt to consult  one  other  additional
       user profile, e.g.,


       which is created automatically during nmh installation.


       $HOME/.mh_profile          The user profile
       $MHSTORE                   Additional profile entries
       /etc/nmh/mhn.defaults      System default MIME profile entries


       Path:                To determine the user's nmh directory
       Current-Folder:      To find the default current folder
       nmh-access-ftp:      Program to retrieve contents via FTP
       nmh-cache            Public directory to store cached external contents
       nmh-private-cache    Personal directory to store cached external contents
       nmh-storage          Directory to store contents
       mhstore-store-<type>*Template for storing contents


       mhbuild(1), mhlist(1), mhshow(1), sendfiles(1)


       `+folder' defaults to the current folder
       `msgs' defaults to cur


       If  a  folder is given, it will become the current folder.  The last message selected will
       become the current message.


       Partial messages contained within a multipart content are not reassembled.