Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
SHOW(1)			    General Commands Manual		       SHOW(1)

NAME
       show - display nmh messages

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

DESCRIPTION
       show lists each of the specified	messages to the	standard output	(typi-
       cally, 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 dis-
       played 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, as well as -header and -noheader, are passed along
       to that program.	 To override the default and the showproc profile com-
       ponent,	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 -showmime-
       proc program switch.

       Note that in some cases,	show may invoke	the showmimeproc even for tex-
       tual  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 appropriate locale(1) environment variables should be  set  to  the
       terminal's  native character set	to avoid gratuitous invocations	of the
       showmimeproc.  See the locale(1)	man page for details about these envi-
       ronment variables.

       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  mes-
       sages.	It  is	equivalent to -nocheckmime -showproc cat.  It is still
       accepted, but should be considered (somewhat) obsolete.

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

       By default show will concatenate	all content under one pager.   If  you
       want  each  part	 to displayed separately, you can override the default
       behavior	with -noconcat.

       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.

FILES
       $HOME/.mh_profile		    The	user profile

PROFILE	COMPONENTS
       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

SEE ALSO
       mhl(1), mhshow(1), next(1), prev(1), scan(1)

DEFAULTS
       `+folder' defaults to the current folder
       `msgs' defaults to cur
       `-checkmime'
       `-header'
       `-concat'

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

BUGS
       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"
       messages.

       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
       in

	    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
       csh:

	    show |& imprint &

       For users of sh:

	    show 2>&1 |	imprint	&

nmh-1.7.1			  2016-03-24			       SHOW(1)

NAME | SYNOPSIS | DESCRIPTION | FILES | PROFILE COMPONENTS | SEE ALSO | DEFAULTS | CONTEXT | BUGS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=show&sektion=1&manpath=FreeBSD+12.1-RELEASE+and+Ports>

home | help