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- .\" This file is automatically generated. Do not edit!
- .SC MSH 1
- .NA
- msh \- MH shell (and BBoard reader)
- .SY
- msh
- \%[\-prompt\ string]
- \%[\-scan] \%[\-noscan]
- \%[\-topcur] \%[\-notopcur]
- \%[file]
- \%[\-help]
- .DE
- \fImsh\fR is an interactive program that
- implements a subset of the normal \fIMH\fR commands
- operating on a single file in \fIpackf\fR'd format.
- That is, \fImsh\fR is used to read a file that contains a number of
- messages,
- as opposed to the standard
- \fIMH\fR
- style of reading a number of files,
- each file being a separate message in a folder.
- \fImsh\fR's chief advantage is that the normal \fIMH\fR style does not allow
- a file to have more than one message in it.
- Hence, \fImsh\fR is ideal for reading \fIBBoards\fR,
- as these files are delivered by the transport system in this format.
- In addition, \fImsh\fR can be used on other files,
- such as message archives which have been \fIpack\fRed (see \fIpackf\fR\0(1)).
- Finally, \fImsh\fR is an excellent \fIMH\fR
- tutor.
- As the only commands available to the user are \fIMH\fR commands,
- this allows \fIMH\fR beginners to concentrate on how commands to
- \fIMH\fR are formed and (more or less) what they mean.
-
- When invoked, \fImsh\fR reads the named file, and enters a command loop.
- The user may type most of the normal
- \fIMH\fR
- commands.
- The syntax and semantics of these commands typed to \fImsh\fR are
- identical to their \fIMH\fR
- counterparts. In cases where the nature of \fImsh\fR would be inconsistent
- (e.g., specifying a `+folder' with some commands),
- \fImsh\fR will duly inform the user.
- The commands that \fImsh\fR currently supports
- (in some slightly modified or restricted forms) are:
- .sp 1
- .in +.5i
- ali
- .br
- burst
- .br
- comp
- .br
- dist
- .br
- folder
- .br
- forw
- .br
- inc
- .br
- mark
- .br
- mhmail
- .br
- msgchk
- .br
- next
- .br
- packf
- .br
- pick
- .br
- prev
- .br
- refile
- .br
- repl
- .br
- rmm
- .br
- scan
- .br
- send
- .br
- show
- .br
- sortm
- .br
- whatnow
- .br
- whom
- .in -.5i
-
- In addition,
- \fImsh\fR has a \*(lqhelp\*(rq command which gives a brief overview.
- To terminate \fImsh\fR, type CTRL\-D, or use the \*(lqquit\*(rq command.
- If \fImsh\fR is being invoked from \fIbbc\fR,
- then typing CTRL\-D will also tell \fIbbc\fR to exit as well,
- while using the \*(lqquit\*(rq command will return control to \fIbbc\fR,
- and \fIbbc\fR will continue examining the list of BBoards
- that it is scanning.
-
- If the file is writable and has been modified,
- then using \*(lqquit\*(rq will query the user if the file should be updated.
-
- The `\-prompt string' switch sets the prompting string for \fImsh\fR.
-
- You may wish to use an alternate \fIMH\fR profile for the commands that
- \fImsh\fR executes;
- see \fImh-profile\fR\0(5) for details about the \fB$MH\fR environment variable.
-
- When invoked from \fIbbc\fR,
- two special features are enabled:
- First,
- the `\-scan' switch directs \fImsh\fR to do a `scan\0unseen' on
- start\-up if new items are present in the BBoard.
- This feature is best used from \fIbbc\fR,
- which correctly sets the stage.
- Second,
- the \fImark\fR command in \fImsh\fR acts specially when you are reading
- a BBoard,
- since \fImsh\fR will consult the sequence \*(lqunseen\*(rq in determining
- what messages you have actually read.
- When \fImsh\fR exits, it reports this information to \fIbbc\fR.
- In addition, if you give the \fImark\fR command with no arguments,
- \fImsh\fR will interpret it
- as `mark\0\-sequence\0unseen\0\-delete\0\-nozero\0all'
- Hence, to discard all of the messages in the current BBoard you're
- reading, just use the \fImark\fR command with no arguments.
-
- When invoked from \fIvmh\fR,
- another special feature is enabled:
- The `topcur' switch directs \fImsh\fR to have the current message
- \*(lqtrack\*(rq the top line of the \fIvmh\fR scan window.
- Normally, \fImsh\fR has the current message \*(lqtrack\*(rq the center of the
- window (under `\-notopcur', which is the default).
-
- \fImsh\fR supports an output redirection facility.
- Commands may be followed by one of
-
- .nf
- .in +.5i
- .ta \w'| \fIcommand\fR 'u
- ^> \fIfile\fR~^write output to \fIfile\fR
- ^>> \fIfile\fR~^append output to \fIfile\fR
- ^| \fIcommand\fR~^pipe output to UNIX \fIcommand\fR
- .re
- .in -.5i
- .fi
-
- If \fIfile\fR starts with a `\~' (tilde),
- then a \fIcsh\fR-like expansion takes place.
- Note that \fIcommand\fR is interpreted by \fIsh\fR\0(1).
- Also note that \fImsh\fR does NOT support
- history substitutions, variable substitutions, or alias substitutions.
-
- When parsing commands to the left of any redirection symbol,
- \fImsh\fR will honor `\\' (back\-slash) as the quote next\-character symbol,
- and `"' (double\-quote) as quote\-word delimiters.
- All other input tokens are separated by whitespace
- (spaces and tabs).
- .Fi
- ^$HOME/\&.mh\(ruprofile~^The user profile
- ^/usr/new/lib/mh/mtstailor~^tailor file
- .Pr
- ^Path:~^To determine the user's MH directory
- .Ps
- ^Msg\-Protect:~^To set mode when creating a new `file'
- .Ps
- ^fileproc:~^Program to file messages
- .Ps
- ^showproc:~^Program to show messages
- .Sa
- bbc(1)
- .De
- `file' defaults to \*(lq./msgbox\*(rq
- .Ds
- `\-prompt\ (msh)\ '
- .Ds
- `\-noscan'
- .Ds
- `\-notopcur'
- .Co
- None
- .Bu
- The argument to the `\-prompt' switch must be interpreted as a single token
- by the shell that invokes \fImsh\fR.
- Therefore,
- one must usually place the argument to this switch inside double\-quotes.
-
- There is a strict limit of messages per file in \fIpackf\fR'd format which
- \fImsh\fR can handle.
- Usually, this limit is 1000 messages.
-
- Please remember that \fImsh\fR is not the \fICShell\fR,
- and that a lot of the nice facilities provided by the latter are not
- present in the former.
-
- In particular, \fImsh\fR does not understand back\-quoting,
- so the only effective way to use \fIpick\fR inside \fImsh\fR is to always use
- the `\-seq\0select' switch.
- Clever users of \fIMH\fR will put the line
-
- .ti +.5i
- pick:\0\-seq\0select\0\-list
-
- in their \&.mh\(ruprofile file so that \fIpick\fR works equally well from
- both the shell and \fImsh\fR.
-
- The \fImsh\fR program inherits most (if not all) of the bugs from the
- \fIMH\fR commands it implements.
- .En
-