Provided by: nmh_1.3-1build1_i386 bug


       show - show (display) messages


       show [+folder] [msgs] [-draft] [-showproc program] [-showmimeproc
            program] [-header | -noheader] [-checkmime | -nocheckmime]
            [switches for showproc or showmimeproc] [-version] [-help]


       Show  lists  each  of  the  specified  messages  to the standard output
       (typically, the terminal).

       By default, text (non-MIME) messages are filtered and displayed by  the
       nmh  command  mhl.   This command will display text messages in a nice,
       uniform format.  It also allows you to  configure  the  format  of  the
       displayed  messages and which headers fields are shown.  See the mhl(1)
       manual page for the details about this command.  This  default  can  be
       changed  by  defining the showproc profile component.  Any switches not
       recognized by show are passed along to that program.  To  override  the
       default  and  the showproc profile component, use the -showproc program
       switch.  For example, -showproc more will cause  the  more  program  to
       list  the  messages  with  no  reformatting.  Normally, this program is
       specified as the showproc in the user's .mh_profile, rather than  using
       a command line switch.

       By default, non-text messages (MIME messages with multi-media contents)
       are processed and  displayed  by  the  nmh  command  mhshow.   See  the
       mhshow(1) manual page for details about this command.  This default can
       changed by defining the showmimeproc profile component.   Any  switches
       not  recognized  by show are passed along to that program.  To override
       this  default  and  the  showmimeproc  profile   component,   use   the
       -showmimeproc program switch.

       Note  that  in  some  cases,  show may invoke the showmimeproc even for
       textual contents.  This will happen for text messages  that  specify  a
       transfer  encoding (such as MIME quoted-printable or base64) or specify
       a character set that show doesn't believe can  be  displayed  natively.
       The  environment  variable  $MM_CHARSET should be set to the terminal's
       native  character  set  to  avoid   gratuitous   invocations   of   the
       showmimeproc.   See  the  mh-profile(5) man page for details about this
       environment variable.

       The option -checkmime (set by default) instructs show to test if any of
       the  messages to be displayed are non-text (MIME) messages.  If any are
       non-text, they are displayed by the program showmimeproc, else they are
       displayed  by  the  program showproc.  The option -nocheckmime disables
       this test and instructs show to use showproc, regardless of whether any
       of the messages are non-text (MIME) messages.

       The  -noshowproc  switch  will  disable  any  formatting  or  paging of
       messages.  It is equivalent to -nocheckmime -showproc cat.  It is still
       accepted, but should be considered (somewhat) obsolete.

       If  the  environment  variable $NOMHNPROC is set, the test for non-text
       (MIME) messages will be disabled.  This method is  obsolete.   Use  the
       -nocheckmime switch instead.

       The  -header switch tells show to display a one-line description of the
       message being shown.  This description  includes  the  folder  and  the
       message number.

       If  no  `msgs' are specified, the current message is used.  Although it
       depends on the specific showproc or showmimeproc, in the default  setup
       when  more  than  one  message is specified, you will be prompted for a
       <RETURN> prior to listing each message.  Each message will be listed  a
       page  at  a time, and when the end of page is reached, the program will
       wait for a <SPACE> or <RETURN>.  If a  <RETURN>  is  entered,  it  will
       print the next line, whereas <SPACE> will print the next screenful.

       If the standard output is not a terminal, no queries are made, and each
       file is listed with a one-line header and two lines of separation.

       “show -draft” will list the file <mh-dir>/draft if it exists.

       If the profile entry “Unseen-Sequence” is present and  non-empty,  then
       show will remove each of the messages shown from each sequence named by
       the profile entry.


       $HOME/.mh_profile          The user profile


       Path:                To determine the user's nmh directory
       Current-Folder:      To find the default current folder
       Unseen-Sequence:     To name sequences denoting unseen messages
       showproc:            Program to show text (non-MIME) messages
       showmimeproc:        Program to show non-text (MIME) messages


       mhl(1), mhshow(1), more(1), next(1), prev(1), scan(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 shown will become the current message.


       The  -header  switch  doesn't work when `msgs' expands to more than one
       message.  If the showproc is mhl, then this problem can be circumvented
       by referencing the “messagename” field in the mhl format file.

       Show updates the user's context before showing the message.  Hence show
       will mark messages as seen prior to  the  user  actually  seeing  them.
       This is generally not a problem, unless the user relies on the “unseen”
       messages mechanism, and interrupts show while it  is  showing  “unseen”

       If  your  showproc is mhl (the default), then show uses a built-in mhl:
       it does not actually run the mhl program.  Hence, if  you  define  your
       own showproc , don't call it mhl since show won't run it.

       If  your  showproc  is  the  pager more, then avoid running show in the
       background with only its standard output piped to another  process,  as

            show | imprint &

       Due  to a bug in more, show will go into a “tty input” state.  To avoid
       this problem, re-direct show's diagnostic output as well.  For users of

            show |& imprint &

       For users of sh:

            show 2>&1 | imprint &