MSH(1) [mh.6] MSH(1)
NAME
msh - MH shell (and BBoard reader)
SYNOPSIS
msh [-prompt string] [-scan] [-noscan] [-topcur]
[-notopcur] [file] [-help]
DESCRIPTION
msh is an interactive program that implements a subset of
the normal MH commands operating on a single file in
packf'd format. That is, msh is used to read a file that
contains a number of messages, as opposed to the standard
MH style of reading a number of files, each file being a
separate message in a folder. msh's chief advantage is
that the normal MH style does not allow a file to have
more than one message in it. Hence, msh is ideal for
reading BBoards, as these files are delivered by the
transport system in this format. In addition, msh can be
used on other files, such as message archives which have
been packed (see packf (1)). Finally, msh is an excellent
MH tutor. As the only commands available to the user are
MH commands, this allows MH beginners to concentrate on
how commands to MH are formed and (more or less) what they
mean.
When invoked, msh reads the named file, and enters a com-
mand loop. The user may type most of the normal MH com-
mands. The syntax and semantics of these commands typed
to msh are identical to their MH counterparts. In cases
where the nature of msh would be inconsistent (e.g., spec-
ifying a `+folder' with some commands), msh will duly
inform the user. The commands that msh currently supports
(in some slightly modified or restricted forms) are:
ali
burst
comp
dist
folder
forw
inc
mark
mhmail
msgchk
next
packf
pick
prev
refile
repl
rmm
scan
send
show
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MSH(1) [mh.6] MSH(1)
sortm
whatnow
whom
In addition, msh has a help command which gives a brief
overview. To terminate msh, type CTRL-D, or use the quit
command. If msh is being invoked from bbc, then typing
CTRL-D will also tell bbc to exit as well, while using the
quit command will return control to bbc, and bbc will con-
tinue examining the list of BBoards that it is scanning.
If the file is writable and has been modified, then using
quit will query the user if the file should be updated.
The `-prompt string' switch sets the prompting string for
msh.
You may wish to use an alternate MH profile for the com-
mands that msh executes; see mh-profile (5) for details
about the $MH envariable.
When invoked from bbc, two special features are enabled:
First, the `-scan' switch directs msh to do a
`scan unseen' on start-up if new items are present in the
BBoard. This feature is best used from bbc, which cor-
rectly sets the stage. Second, the mark command in msh
acts specially when you are reading a BBoard, since msh
will consult the sequence unseen in determining what mes-
sages you have actually read. When msh exits, it reports
this information to bbc. In addition, if you give the
mark command with no arguments, msh will interpret it as
`mark -sequence unseen -delete -nozero all' Hence, to dis-
card all of the messages in the current BBoard you're
reading, just use the mark command with no arguments.
Normally, the exit command is identical to the quit com-
mand in msh. When run under bbc however, exit directs msh
to mark all messages as seen and then quit. For speedy
type-in, this command is often abbreviated as just e.
When invoked from vmh, another special feature is enabled:
The `topcur' switch directs msh to have the current mes-
sage track the top line of the vmh scan window. Normally,
msh has the current message track the center of the window
(under `-notopcur', which is the default).
msh supports an output redirection facility. Commands may
be followed by one of
> file write output to file
>> file append output to file
| command pipe output to UNIX command
If file starts with a ` ' (tilde), then a csh-like
MH April 22, 1986 2
MSH(1) [mh.6] MSH(1)
expansion takes place. Note that command is interpreted
by sh (1). Also note that msh does NOT support history
substitutions, variable substitutions, or alias substitu-
tions.
When parsing commands to the left of any redirection sym-
bol, msh will honor `\' (back-slash) as the quote
next-character symbol, and `"' (double-quote) as
quote-word delimiters. All other input tokens are sepa-
rated by whitespace (spaces and tabs).
FILES
$HOME/.mh_profile The user profile
/usr/contrib/mh/lib/mtstailor tailor file
PROFILE COMPONENTS
Path: To determine the user's MH directory
Msg-Protect: To set mode when creating a new `file'
fileproc: Program to file messages
showproc: Program to show messages
SEE ALSO
bbc(1)
DEFAULTS
`file' defaults to ./msgbox
`-prompt (msh) '
`-noscan'
`-notopcur'
CONTEXT
None
BUGS
The argument to the `-prompt' switch must be interpreted
as a single token by the shell that invokes msh. There-
fore, one must usually place the argument to this switch
inside double-quotes.
There is a strict limit of messages per file in packf'd
format which msh can handle. Usually, this limit is 1000
messages.
Please remember that msh is not the CShell, and that a lot
of the nice facilities provided by the latter are not pre-
sent in the former.
In particular, msh does not understand back-quoting, so
the only effective way to use pick inside msh is to always
use the `-seq select' switch. Clever users of MH will put
the line
pick: -seq select -list
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MSH(1) [mh.6] MSH(1)
in their .mh_profile file so that pick works equally well
from both the shell and msh.
The msh program inherits most (if not all) of the bugs
from the MH commands it implements.
MH April 22, 1986 4