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- .\" This file is automatically generated. Do not edit!
- .SC SCAN 1
- .NA
- scan \- produce a one line per message scan listing
- .SY
- scan
- \%[+folder] \%[msgs]
- \%[\-clear] \%[\-noclear]
- \%[\-form\ formatfile]
- \%[\-format\ string]
- \%[\-header] \%[\-noheader]
- \%[\-width\ columns]
- \%[\-help]
- .DE
- \fIScan\fR produces a one\-line\-per\-message listing of the specified
- messages.
- Each \fIscan\fR line contains the message number (name),
- the date, the \*(lqFrom:\*(rq field, the \*(lqSubject\*(rq field, and, if room
- allows, some of the body of the message.
- For example:
-
- .nf
- .in +.5i
- .ta \w'15+- 'u +\w'7/\05 'u +\w'Dcrocker 'u
- 15+ 7/\05 Dcrocker nned\0\0\*(<<Last week I asked some of
- 16\0- 7/\05 dcrocker message id format\0\0\*(<<I recommend
- 18 7/\06 Obrien Re: Exit status from mkdir
- 19 7/\07 Obrien \*(lqscan\*(rq listing format in MH
- .re
- .in -.5i
- .fi
-
- The `+' on message 15 indicates that it is the current message.
- The `\-' on message 16 indicates that it has been
- replied to, as indicated by a \*(lqReplied:\*(rq component produced by
- an `\-annotate' switch to the \fIrepl\fR command.
-
- If there is sufficient room left on the \fIscan\fR line after the
- subject, the line will be filled with text from the body,
- preceded by <<, and terminated by >> if the body is sufficiently short.
- \fIScan\fR actually reads each of the specified
- messages and parses them to extract the desired fields.
- During parsing, appropriate error messages will be produced if
- there are format errors in any of the messages.
-
- The `\-header' switch produces a header line prior to the \fIscan\fR
- listing.
- Currently,
- the name of the folder and the current date and time are output
- (see the \fBHISTORY\fR section for more information).
-
- If the `\-clear' switch is used and \fIscan's\fR output is directed to a
- terminal,
- then \fIscan\fR will consult the \fB$TERM\fR and \fB$TERMCAP\fR
- environment variables to determine your
- terminal type in order to find out how to clear the screen prior to exiting.
- If the `\-clear' switch is used and \fIscan's\fR output is not directed to
- a terminal (e.g., a pipe or a file),
- then \fIscan\fR will send a formfeed prior to exiting.
-
- For example, the command:
-
- .ti +.5i
- (scan \-clear \-header; show all \-show pr \-f) | lpr
-
- produces a scan listing of the current folder, followed by a formfeed,
- followed by a formatted listing of all messages in the folder, one per
- page. Omitting `\-show\ pr\ \-f' will cause the messages to be concatenated,
- separated by a one\-line header and two blank lines.
-
- If \fIscan\fR encounters a message without a \*(lqDate:\*(rq field,
- rather than leaving that portion of the scan listing blank,
- the date is filled\-in with the last write date of the message,
- and post\-fixed with a `*'.
- This is particularly handy for scanning a \fIdraft folder\fR,
- as message drafts usually aren't allowed to have dates in them.
-
- To override the output format used by \fIscan\fR,
- the `\-format\ string' or `\-format\ file' switches are used.
- This permits individual fields of the scan listing to be extracted with ease.
- The string is simply a format string and the file is simply a format file.
- See \fImh\-format\fR\0(5) for the details.
-
- In addition to the standard escapes,
- \fIscan\fR also recognizes the following additional escape:
- .nf
- .ta \w'escape 'u
- \fIescape\fR \fIsubstitution\fR
- body the (compressed) first part of the body
- .re
- .fi
-
- On hosts where \fIMH\fR was configured with the BERK option,
- \fIscan\fR has two other switches: `\-reverse', and `\-noreverse'.
- These make \fIscan\fR list the messages in reverse order.
- In addition,
- \fIscan\fR will update the \fIMH\fR context prior to starting the listing,
- so interrupting a long \fIscan\fR listing preserves the new context.
- \fIMH\fR purists hate both of these ideas.
- .Fi
- ^$HOME/\&.mh\(ruprofile~^The user profile
- .Pr
- ^Path:~^To determine the user's MH directory
- .Ps
- ^Alternate\-Mailboxes:~^To determine the user's mailboxes
- .Ps
- ^Current\-Folder:~^To find the default current folder
- .Sa
- inc(1), pick(1), show(1), mh\-format(5)
- .De
- `+folder' defaults to the folder current
- .Ds
- `msgs' defaults to all
- .Ds
- `\-format' defaulted as described above
- .Ds
- `\-noheader'
- .Ds
- `\-width' defaulted to the width of the terminal
- .Co
- If a folder is given, it will become the current folder.
- .Hi
- Prior to using the format string mechanism,
- `\-header' used to generate a heading saying what each column in the listing
- was.
- Format strings prevent this from happening.
- .Bu
- The argument to the `\-format' switch must be interpreted as a single token
- by the shell that invokes \fIscan\fR.
- Therefore,
- one must usually place the argument to this switch inside double\-quotes.
- .En
-