Use RFC 2047 encoding for Content-Description, and make sure to encode

[nmh] / man / mhbuild.man

diff --git a/man/mhbuild.man b/man/mhbuild.man
index 1d053d6db44884eba0b1f189edb5501bdf56e272..db80e232d6d39388874d66e5399bb420562ca19b 100644 (file)
--- a/man/mhbuild.man
+++ b/man/mhbuild.man
@@ -1,99 +1,169 @@
+.TH MHBUILD %manext1% "January 23, 2014" "%nmhversion%"

 .\"
 .\" %nmhwarning%
 .\"
 .\" %nmhwarning%

-.\" $Id$

 .\"
 .\"

-.\" include the -mh macro file
-.so %etcdir%/tmac.h
-.\"
-.TH MHBUILD %manext1% "%nmhdate%" MH.6.8 [%nmhversion%]

 .SH NAME
 mhbuild \- translate MIME composition draft
 .SH SYNOPSIS
 .SH NAME
 mhbuild \- translate MIME composition draft
 .SH SYNOPSIS

-.in +.5i
-.ti -.5i
-mhbuild file
-.br
-\%[\-list] \%[-nolist]
-\%[\-realsize] \%[\-norealsize]
-.br
-\%[\-headers] \%[\-noheaders]
-\%[\-ebcdicsafe] \%[\-noebcdicsafe]
-.br
-\%[\-rfc934mode] \%[\-norfc934mode]
-\%[\-verbose] \%[\-noverbose]
-.br
-\%[\-check] \%[\-nocheck]
-\%[\-version]
-\%[\-help]
-.in -.5i
+.na
+.HP 5
+.B mhbuild
+.I file
+.RB [ \-auto " | " \-noauto ]
+.RB [ \-list " | " \-nolist ]
+.RB [ \-realsize " | " \-norealsize ]
+.RB [ \-headers " | " \-noheaders ]
+.RB [ \-directives " | " \-nodirectives ]
+.RB [ \-rfc934mode " | " \-norfc934mode ]
+.RB [ \-contentid " | " \-nocontentid ]
+.RB [ \-verbose " | " \-noverbose ]
+.RB [ \-check " | " \-nocheck ]
+.RB [ \-headerencoding 
+.IR encoding\-algorithm
+.RB " | " \-autoheaderencoding ]
+.RB [ \-maxunencoded
+.IR line\-length ]
+.RB [ \-dist ]
+.RB [ \-version ]
+.RB [ \-help ]
+.ad

 .SH DESCRIPTION
 .SH DESCRIPTION

-The \fImhbuild\fR command will translate a MIME composition draft into
+The
+.B mhbuild
+command will translate a MIME composition draft into

 a valid MIME message.
 a valid MIME message.

-
-\fImhbuild\fR creates multi-media messages as specified in RFC\-2045
-thru RFC\-2049.  Currently \fImhbuild\fR only supports encodings in
-message bodies, and does not support the encoding of message headers as
-specified in RFC\-2047.
-
+.PP
+.B mhbuild
+creates multi-media messages as specified in RFC 2045
+to RFC 2049.  This includes the encoding of message headers as specified
+by RFC 2047.
+.PP

 If you specify the name of the composition file as \*(lq-\*(rq,
 If you specify the name of the composition file as \*(lq-\*(rq,

-then \fImhbuild\fR will accept the composition draft on the standard
-input.  If the translation of this input is successful, \fImhbuild\fR
+then
+.B mhbuild
+will accept the composition draft on the standard
+input.  If the translation of this input is successful,
+.B mhbuild

 will output the new MIME message to the standard output.  This argument
 must be the last argument on the command line.
 will output the new MIME message to the standard output.  This argument
 must be the last argument on the command line.

-
-Otherwise if the file argument to \fImhbuild\fR is the name of a valid
-composition file, and the translation is successful, \fImhbuild\fR will
-replace the original file with the new MIME message.  It will rename
+.PP
+Otherwise if the file argument to
+.B mhbuild
+is the name of a valid
+composition file, and the translation is successful,
+.B mhbuild
+will replace the original file with the new MIME message.  It will rename

 the original file to start with the \*(lq,\*(rq character and end with the
 string \*(lq.orig\*(rq, e.g., if you are editing the file \*(lqdraft\*(rq,
 it will be renamed to \*(lq,draft.orig\*(rq.  This allows you to easily
 the original file to start with the \*(lq,\*(rq character and end with the
 string \*(lq.orig\*(rq, e.g., if you are editing the file \*(lqdraft\*(rq,
 it will be renamed to \*(lq,draft.orig\*(rq.  This allows you to easily

-recover the \fImhbuild\fR input file.
-
-.Uh "Listing the Contents"
-The `\-list' switch tells \fImhbuild\fR to list the table of contents
-associated with the MIME message that is created.
-
-The `\-headers' switch indicates
+recover the
+.B mhbuild
+input file.
+.SS "Listing the Contents"
+The
+.B \-list
+switch tells
+.B mhbuild
+to list the table of contents associated with the MIME message that is created.
+.PP
+The
+.B \-headers
+switch indicates

 that a one-line banner should be displayed above the listing.  The
 that a one-line banner should be displayed above the listing.  The

-`\-realsize' switch tells \fImhbuild\fR to evaluate the \*(lqnative\*(rq
+.B \-realsize
+switch tells
+.B mhbuild
+to evaluate the \*(lqnative\*(rq

 (decoded) format of each content prior to listing.  This provides an
 (decoded) format of each content prior to listing.  This provides an

-accurate count at the expense of a small delay.  If the `\-verbose' switch
+accurate count at the expense of a small delay.  If the
+.B \-verbose
+switch

 is present, then the listing will show any \*(lqextra\*(rq information
 is present, then the listing will show any \*(lqextra\*(rq information

-that is present in the message, such as comments in the Content-Type header.
-
-.Uh "Translating the Composition File"
-\fImhbuild\fR is essentially a filter to aid in the composition of MIME
-messages.  \fImhbuild\fR will convert an
-\fImhbuild\fR \*(lqcomposition file\*(rq
-into a valid MIME message.  A \fImhbuild\fR \*(lqcomposition file\*(rq
+that is present in the message, such as comments in the
+\*(lqContent-Type\*(rq header.
+.SS "Simplified Attachment Interface"
+For users who wish to simply attach files to text content,
+.B mhbuild
+will scan the composition file for \*(lqAttach\*(rq headers.  An
+\*(lqAttach\*(rq header contains a filename that will be appended to the
+message using normal MIME encapsulation rules.  One filename is allowed
+per \*(lqAttach\*(rq header, but multiple \*(lqAttach\*(rq headers are
+allowed ber composition file.
+.PP
+These files will be appended after any other MIME content, including any
+content specified by
+.B mhbuild
+directives (see below).  See
+.IR send (1)
+for more details.
+.SS "Translating the Composition File"
+.B mhbuild
+is essentially a filter to aid in the composition of MIME
+messages.
+.B mhbuild
+will convert an
+.B mhbuild
+\*(lqcomposition file\*(rq
+into a valid MIME message.  A
+.B mhbuild
+\*(lqcomposition file\*(rq

 is just a file containing plain text that is interspersed
 is just a file containing plain text that is interspersed

-with various \fImhbuild\fR directives.  When this file is processed
-by \fImhbuild\fR, the various directives will be expanded to the
+with various
+.B mhbuild
+directives.  When this file is processed
+by
+.BR mhbuild ,
+the various directives will be expanded to the

 appropriate content, and will be encoded according to the MIME standards.
 The resulting MIME message can then be sent by electronic mail.
 appropriate content, and will be encoded according to the MIME standards.
 The resulting MIME message can then be sent by electronic mail.

-
-The formal syntax for a \fImhbuild\fR composition file is defined at the
+.PP
+The formal syntax for a
+.B mhbuild
+composition file is defined at the

 end of this document, but the ideas behind this format are not complex.
 Basically, the body contains one or more contents.  A content consists of
 either a directive, indicated with a \*(lq#\*(rq as the first character
 of a line; or, plaintext (one or more lines of text).  The continuation
 character, \*(lq\\\*(lq, may be used to enter a single directive on more
 than one line, e.g.,
 end of this document, but the ideas behind this format are not complex.
 Basically, the body contains one or more contents.  A content consists of
 either a directive, indicated with a \*(lq#\*(rq as the first character
 of a line; or, plaintext (one or more lines of text).  The continuation
 character, \*(lq\\\*(lq, may be used to enter a single directive on more
 than one line, e.g.,

-.sp
+.PP
+.RS 5

 .nf
 .nf

-.in +.5i

 #image/png \\
     /home/foobar/junk/picture.png
 #image/png \\
     /home/foobar/junk/picture.png

-.in -.5i

 .fi
 .fi

-.sp
-There are four kinds of directives: \*(lqtype\*(rq directives, which
+.RE
+.PP
+There are five kinds of directives: \*(lqtype\*(rq directives, which

 name the type and subtype of the content; \*(lqexternal-type\*(rq
 directives, which also name the type and subtype of the content; the
 \*(lqmessage\*(rq directive (#forw), which is used to forward one or
 name the type and subtype of the content; \*(lqexternal-type\*(rq
 directives, which also name the type and subtype of the content; the
 \*(lqmessage\*(rq directive (#forw), which is used to forward one or

-more messages; and, the \*(lqbegin\*(rq directive (#begin), which is
-used to create a multipart content.
-
+more messages; the \*(lqbegin\*(rq directive (#begin), which is
+used to create a multipart content; and the \*(lqon/off/pop\*(rq
+directives (#on, #off, #pop) which control whether any other
+directives are honored at all.
+.PP
+The
+.B \-directives
+switch allows control over whether mhbuild will honor any of the
+\*(lq#\*(rq-directives.  This can also be affected with the #on or
+#off directives, and #pop, which restores the state of processing to
+that preceding the most recent #on or #off.  (The #on, #off, and #pop
+directives are always honored, of course.) This allows inclusion of
+plain text which looks like mhbuild directives, without causing
+errors:
+.PP
+.RS 5
+.nf
+#off
+#include <stdio.h>
+printf("Hello, World!);
+#pop
+.fi
+.RE
+.PP
+Currently the stack depth for the #on/off/pop directives is 32.
+.PP

 The \*(lqtype\*(rq directive is used to directly specify the type and
 subtype of a content.  You may only specify discrete types in this manner
 (can't specify the types multipart or message with this directive).
 The \*(lqtype\*(rq directive is used to directly specify the type and
 subtype of a content.  You may only specify discrete types in this manner
 (can't specify the types multipart or message with this directive).


@@ -102,98 +172,109 @@ in \*(lqnative\*(rq (decoded) format.  If this filename starts with the
 \*(lq|\*(rq character, then it represents a command to execute whose
 output is captured accordingly.
 For example,
 \*(lq|\*(rq character, then it represents a command to execute whose
 output is captured accordingly.
 For example,

-.sp
+.PP
+.RS 5

 .nf
 .nf

-.in +.5i

 #audio/basic |raw2audio -F < /usr/lib/sound/giggle.au
 #audio/basic |raw2audio -F < /usr/lib/sound/giggle.au

-.in -.5i

 .fi
 .fi

-.sp
-If a filename is not given, \fImhbuild\fR will look for information in the
+.RE
+.PP
+If a filename is not given,
+.B mhbuild
+will look for information in the

 user's profile to determine how the different contents should be composed.
 This is accomplished by consulting a composition string, and executing
 user's profile to determine how the different contents should be composed.
 This is accomplished by consulting a composition string, and executing

-it under \fB/bin/sh\fR, with the standard output set to the content.
-If the `\-verbose' switch is given, \fImhbuild\fR will echo any commands
-that are used to create contents in this way.
-.ne 13
+it under
+.BR /bin/sh ,
+with the standard output set to the content.
+If the
+.B \-verbose
+switch is given,
+.B mhbuild
+will echo any commands that are used to create contents in this way.
+.PP

 The composition string may contain the following escapes:
 The composition string may contain the following escapes:

-.sp
+.PP
+.RS 5

 .nf
 .nf

-.in +.5i

 .ta \w'%P  'u
 %a     Insert parameters from directive
 %f     Insert filename containing content
 %F     %f, and stdout is not re-directed
 %s     Insert content subtype
 %%     Insert character %
 .ta \w'%P  'u
 %a     Insert parameters from directive
 %f     Insert filename containing content
 %F     %f, and stdout is not re-directed
 %s     Insert content subtype
 %%     Insert character %

-.re
-.in -.5i

 .fi
 .fi

-.sp
-
+.RE
+.PP

 First,
 First,

-\fImhbuild\fR will look for an entry of the form:
-.sp
-.in +.5i
+.B mhbuild
+will look for an entry of the form:
+.PP
+.RS 5

 mhbuild-compose-<type>/<subtype>
 mhbuild-compose-<type>/<subtype>

-.in -.5i
-.sp
+.RE
+.PP

 to determine the command to use to compose the content.  If this isn't
 to determine the command to use to compose the content.  If this isn't

-found, \fImhbuild\fR will look for an entry of the form:
-.sp
-.in +.5i
+found,
+.B mhbuild
+will look for an entry of the form:
+.PP
+.RS 5

 mhbuild-compose-<type>
 mhbuild-compose-<type>

-.in -.5i
-.sp
-to determine the composition command.
-
-If this isn't found, \fImhbuild\fR
+.RE
+.PP
+to determine the composition command. If this isn't found,
+.B mhbuild

 will complain.
 will complain.

-
+.PP

 An example entry might be:
 An example entry might be:

-.sp
-.in +.5i
+.PP
+.RS 5

 mhbuild-compose-audio/basic: record | raw2audio -F
 mhbuild-compose-audio/basic: record | raw2audio -F

-.in -.5i
-.sp
+.RE
+.PP

 Because commands like these will vary, depending on the display
 environment used for login, composition strings for different
 contents should probably be put in the file specified by the
 Because commands like these will vary, depending on the display
 environment used for login, composition strings for different
 contents should probably be put in the file specified by the

-\fB$MHBUILD\fR environment variable, instead of directly in your
+.B $MHBUILD
+environment variable, instead of directly in your

 user profile.
 user profile.

-
+.PP

 The \*(lqexternal-type\*(rq directives are used to provide a MIME
 reference to a content, rather than enclosing the contents itself
 (for instance, by specifying an ftp site).  Hence, instead of
 providing a filename as with the type directives, external-parameters
 are supplied.  These look like regular parameters, so they must be
 separated accordingly.  For example,
 The \*(lqexternal-type\*(rq directives are used to provide a MIME
 reference to a content, rather than enclosing the contents itself
 (for instance, by specifying an ftp site).  Hence, instead of
 providing a filename as with the type directives, external-parameters
 are supplied.  These look like regular parameters, so they must be
 separated accordingly.  For example,

-.sp
+.PP
+.RS 5

 .nf
 .nf

-.in +.5i

 #@application/octet-stream; \\
     type=tar; \\
     conversions=compress \\
     [this is the nmh distribution] \\
 #@application/octet-stream; \\
     type=tar; \\
     conversions=compress \\
     [this is the nmh distribution] \\

+    {attachment; filename="nmh.tar.gz"} \\

     name="nmh.tar.gz"; \\
     directory="/pub/nmh"; \\
     site="ftp.math.gatech.edu"; \\
     access-type=anon-ftp; \\
     mode="image"
     name="nmh.tar.gz"; \\
     directory="/pub/nmh"; \\
     site="ftp.math.gatech.edu"; \\
     access-type=anon-ftp; \\
     mode="image"

-.in -.5i

 .fi
 .fi

-.sp
+.RE
+.PP

 You must give a description string to separate the content parameters
 from the external-parameters (although this string may be empty).
 This description string is specified by enclosing it within
 You must give a description string to separate the content parameters
 from the external-parameters (although this string may be empty).
 This description string is specified by enclosing it within

-\*(lq[]\*(rq.
-.ne 19
+\*(lq[]\*(rq.  A disposition string, to appear in a
+\*(lqContent-Disposition\*(rq header, may appear in the optional
+\*(lq{}\*(rq.
+.PP

 These parameters are of the form:
 These parameters are of the form:

-.sp
+.PP
+.RS 5

 .nf
 .nf

-.in +.5i

 .ta \w'access-type=  'u
 .ta \w'access-type=  'u

-access-type=   usually \fIanon-ftp\fR or \fImail-server\fR
+access-type=   usually \fIanon-ftp\fR, \fImail-server\fR, or \fIurl\fR

 name=  filename
 permission=    read-only or read-write
 site=  hostname
 name=  filename
 permission=    read-only or read-write
 site=  hostname


@@ -203,118 +284,175 @@ size=   number of octets
 server=        mailbox
 subject=       subject to send
 body=  command to send for retrieval
 server=        mailbox
 subject=       subject to send
 body=  command to send for retrieval

-.re
-.in -.5i
+url=   URL of content

 .fi
 .fi

-.sp
-
+.RE
+.PP
+A mimimum \*(lqexternal\-type\*(rq directive for the
+.B url
+.I access\-type
+would be as follows:
+.PP
+.RS 3
+.nf
+#@application/octet-stream [] access-type=url; \\
+  url="http://download.savannah.gnu.org/releases/nmh/nmh-1.5.tar.gz"
+.fi
+.RE
+.PP
+Any long URLs will be wrapped according to RFC 2017 rules.
+.PP

 The \*(lqmessage\*(rq directive (#forw) is used to specify a message or
 group of messages to include.  You may optionally specify the name of
 the folder and which messages are to be forwarded.  If a folder is not
 given, it defaults to the current folder.  Similarly, if a message is not
 given, it defaults to the current message.  Hence, the message directive
 The \*(lqmessage\*(rq directive (#forw) is used to specify a message or
 group of messages to include.  You may optionally specify the name of
 the folder and which messages are to be forwarded.  If a folder is not
 given, it defaults to the current folder.  Similarly, if a message is not
 given, it defaults to the current message.  Hence, the message directive

-is similar to the \fIforw\fR\0(1) command, except that the former uses
-the MIME rules for encapsulation rather than those specified in RFC\-934.
+is similar to the
+.B forw
+command, except that the former uses
+the MIME rules for encapsulation rather than those specified in RFC 934.

 For example,
 For example,

-.sp
+.PP
+.RS 5

 .nf
 .nf

-.in +.5i

 #forw +inbox 42 43 99
 #forw +inbox 42 43 99

-.in -.5i

 .fi
 .fi

-.sp
+.RE
+.PP

 If you include a single message, it will be included directly as a content
 of type \*(lqmessage/rfc822\*(rq.  If you include more than one message,
 If you include a single message, it will be included directly as a content
 of type \*(lqmessage/rfc822\*(rq.  If you include more than one message,

-then \fImhbuild\fR will add a content of type \*(lqmultipart/digest\*(rq
+then
+.B mhbuild
+will add a content of type \*(lqmultipart/digest\*(rq

 and include each message as a subpart of this content.
 and include each message as a subpart of this content.

-
+.PP

 If you are using this directive to include more than one message, you
 If you are using this directive to include more than one message, you

-may use the `\-rfc934mode' switch.  This switch will indicate that
-\fImhbuild\fR should attempt to utilize the MIME encapsulation rules
+may use the
+.B \-rfc934mode
+switch.  This switch will indicate that
+.B mhbuild
+should attempt to utilize the MIME encapsulation rules

 in such a way that the \*(lqmultipart/digest\*(rq that is created
 in such a way that the \*(lqmultipart/digest\*(rq that is created

-is (mostly) compatible with the encapsulation specified in RFC\-934.
-If given, then RFC\-934 compliant user-agents should be able to burst the
+is (mostly) compatible with the encapsulation specified in RFC 934.
+If given, then RFC 934 compliant user-agents should be able to burst the

 message on reception\0--\0providing that the messages being encapsulated
 do not contain encapsulated messages themselves.  The drawback of this
 approach is that the encapsulations are generated by placing an extra
 newline at the end of the body of each message.
 message on reception\0--\0providing that the messages being encapsulated
 do not contain encapsulated messages themselves.  The drawback of this
 approach is that the encapsulations are generated by placing an extra
 newline at the end of the body of each message.

-
+.PP

 The \*(lqbegin\*(rq directive is used to create a multipart content.
 When using the \*(lqbegin\*(rq directive, you must specify at least one
 content between the begin and end pairs.
 The \*(lqbegin\*(rq directive is used to create a multipart content.
 When using the \*(lqbegin\*(rq directive, you must specify at least one
 content between the begin and end pairs.

-.sp
+.PP
+.RS 5

 .nf
 .nf

-.in +.5i

 #begin
 This will be a multipart with only one part.
 #end
 #begin
 This will be a multipart with only one part.
 #end

-.in -.5i

 .fi
 .fi

-.sp
-If you use multiple directives in a composition draft, \fImhbuild\fR will
+.RE
+.PP
+If you use multiple directives in a composition draft,
+.B mhbuild
+will

 automatically encapsulate them inside a multipart content.  Therefore the
 \*(lqbegin\*(rq directive is only necessary if you wish to use nested
 multiparts, or create a multipart message containing only one part.
 automatically encapsulate them inside a multipart content.  Therefore the
 \*(lqbegin\*(rq directive is only necessary if you wish to use nested
 multiparts, or create a multipart message containing only one part.

-
+.PP

 For all of these directives, the user may include a brief description
 of the content between the \*(lq[\*(rq character and the \*(lq]\*(rq
 character.  This description will be copied into the
 \*(lqContent-Description\*(rq header when the directive is processed.
 For all of these directives, the user may include a brief description
 of the content between the \*(lq[\*(rq character and the \*(lq]\*(rq
 character.  This description will be copied into the
 \*(lqContent-Description\*(rq header when the directive is processed.

-.sp
+.PP
+.RS 5

 .nf
 .nf

-.in +.5i

 #forw [important mail from Bob] +bob 1 2 3 4 5
 #forw [important mail from Bob] +bob 1 2 3 4 5

-.in -.5i

 .fi
 .fi

-.sp
-By default, \fImhbuild\fR will generate a unique \*(lqContent-ID:\*(rq for
-each directive; however, the user may override this by defining the ID
-using the \*(lq<\*(rq and \*(lq>\*(rq characters.
-
+.RE
+.PP
+Similarly, a disposition string may optionally be provided between
+\*(lq{\*(rq and \*(lq}\*(rq characters; it will be copied into the
+\*(lqContent-Disposition\*(rq header when the directive is processed.
+If a disposition string is provided that does not contain a filename
+parameter, and a filename is provided in the directive, it will be
+added to the \*(lqContent-Disposition\*(rq header.  For example, the
+following directive:
+.PP
+.RS 5
+.nf
+#text/plain; charset=iso-8859-1 <>{attachment} /tmp/summary.txt
+.fi
+.RE
+.PP
+creates these message part headers:
+.PP
+.RS 5
+.nf
+Content-Type: text/plain; charset="iso-8859-1"
+Content-Disposition: attachment; filename="summary.txt"
+.fi
+.RE
+.PP
+By default,
+.B mhbuild
+will generate a unique \*(lqContent-ID:\*(rq for each directive,
+corresponding to each message part; however, the user may override
+this by defining the ID using the \*(lq<\*(rq and \*(lq>\*(rq
+characters.  The
+.B \-nocontentid
+switch suppresses creation of all \*(lqContent-ID:\*(rq headers,
+even in the top level of the message.
+.PP
+Normally
+.B mhbuild
+will choose an appropriate Content\-Transfer\-Encoding based on the content
+and the MIME Content\-Type.  However, you can override that in an
+.B mhbuild
+directive by specifying \*(lq*\*(rq and the encoding.  Acceptable encoding
+values are \*(lq8bit\*(rq, \*(lqqp\(*rq (for quoted\-printable), and
+\*(lqb64\*(rq (for base64 encoding).  It should be noted that undesired
+results may occur if 8bit or quoted\-printable is selected for binary
+content, due to the translation between Unix line endings and the line
+endings use by the mail transport system.
+.PP

 In addition to the various directives, plaintext can be present.
 Plaintext is gathered, until a directive is found or the draft is
 exhausted, and this is made to form a text content.  If the plaintext
 must contain a \*(lq#\*(rq at the beginning of a line, simply double it,
 In addition to the various directives, plaintext can be present.
 Plaintext is gathered, until a directive is found or the draft is
 exhausted, and this is made to form a text content.  If the plaintext
 must contain a \*(lq#\*(rq at the beginning of a line, simply double it,

-.ne 6

 e.g.,
 e.g.,

-.sp
-.in +.5i
+.PP
+.RS 5

 ##when sent, this line will start with only one #
 ##when sent, this line will start with only one #

-.in -.5i
-.sp
+.RE
+.PP

 If you want to end the plaintext prior to a directive, e.g., to have two
 plaintext contents adjacent, simply insert a line containing a single
 If you want to end the plaintext prior to a directive, e.g., to have two
 plaintext contents adjacent, simply insert a line containing a single

-\*(lq#\*(rq character,
-.ne 10
-e.g.,
-.sp
+\*(lq#\*(rq character, e.g.,
+.PP
+.RS 5

 .nf
 .nf

-.in +.5i

 this is the first content
 #
 and this is the second
 this is the first content
 #
 and this is the second

-.in -.5i

 .fi
 .fi

-.sp
-Finally,
-if the plaintext starts with a line of the form:
-.sp
-.in +.5i
+.RE
+.PP
+Finally, if the plaintext starts with a line of the form:
+.PP
+.RS 5

 Content-Description: text
 Content-Description: text

-.in -.5i
-.sp
+.RE
+.PP

 then this will be used to describe the plaintext content.
 You MUST follow this line with a blank line before starting
 your text.
 then this will be used to describe the plaintext content.
 You MUST follow this line with a blank line before starting
 your text.

-
+.PP

 By default, plaintext is captured as a text/plain content.  You can
 override this by starting the plaintext with \*(lq#<\*(rq followed by
 By default, plaintext is captured as a text/plain content.  You can
 override this by starting the plaintext with \*(lq#<\*(rq followed by

-a content-type specification.  For example,
-.ne 11
-e.g.,
-.sp
+a content-type specification.  For example, e.g.,
+.PP
+.RS 5

 .nf
 .nf

-.in +.5i

 #<text/enriched
 this content will be tagged as text/enriched
 #
 #<text/enriched
 this content will be tagged as text/enriched
 #


@@ -322,38 +460,60 @@ and this content will be tagged as text/plain
 #
 #<application/x-patch [this is a patch]
 and this content will be tagged as application/x-patch
 #
 #<application/x-patch [this is a patch]
 and this content will be tagged as application/x-patch

-.in -.5i

 .fi
 .fi

-.sp
+.RE
+.PP

 Note that if you use the \*(lq#<\*(rq plaintext-form, then the
 content-description must be on the same line which identifies the content
 type of the plaintext.
 Note that if you use the \*(lq#<\*(rq plaintext-form, then the
 content-description must be on the same line which identifies the content
 type of the plaintext.

-
+.PP

 When composing a text content, you may indicate the relevant character
 set by adding the \*(lqcharset\*(rq parameter to the directive.
 When composing a text content, you may indicate the relevant character
 set by adding the \*(lqcharset\*(rq parameter to the directive.

-.sp
-.in +.5i
+.PP
+.RS 5

 #<text/plain; charset=iso-8859-5
 #<text/plain; charset=iso-8859-5

-.in -.5i
-.sp
-If a text content contains any 8bit characters (characters with the
+.RE
+.PP
+If a text content contains any 8\-bit characters (characters with the

 high bit set) and the character set is not specified as above, then
 high bit set) and the character set is not specified as above, then

-\fImhbuild\fR will assume the character set is of the type given by the
-environment variable MM_CHARSET.  If this environment variable is not
+.B mhbuild
+will assume the character set is of the type given by the
+standard
+.IR locale (1)
+environment variables.  If these environment variables are not

 set, then the character set will be labeled as \*(lqx-unknown\*(rq.
 set, then the character set will be labeled as \*(lqx-unknown\*(rq.

-
-If a text content contains only 7bit characters and the character set
+.PP
+If a text content contains only 7\-bit characters and the character set

 is not specified as above, then the character set will be labeled as
 is not specified as above, then the character set will be labeled as

-\*(lqus-ascii\*(rq
-
+\*(lqus-ascii\*(rq.
+.PP
+By default text content with the high bit set is encoded with a 8bit
+Content\-Transfer\-Encoding.  If the text has lines longer than the value
+of
+.B \-maxunencoded
+(which defaults to 78) then the text is encoded using the quoted\-printable
+encoding.
+.PP
+The
+.B \-headerencoding
+switch will indicate which algorithm to use when encoding any message headers
+that contain 8\-bit characters.  The valid arguments are
+.I base64
+for based\-64 encoding and 
+.I quoted
+for quoted\-printable encoding.  The
+.B \-autoheaderencoding
+switch will instruct
+.B mhbuild
+to automatically pick the algorithm that results in a shorter encoded string.
+.PP

 Putting this all together,
 Putting this all together,

-.ne 15

 here is an example of a more complicated message draft.  The
 following draft will expand into a multipart/mixed message
 containing five parts:
 here is an example of a more complicated message draft.  The
 following draft will expand into a multipart/mixed message
 containing five parts:

-.sp
+.PP
+.RS 5

 .nf
 .nf

-.in +.5i

 To: nobody@nowhere.org
 cc:
 Subject: Look and listen to me!
 To: nobody@nowhere.org
 cc:
 Subject: Look and listen to me!


@@ -367,214 +527,256 @@ This third part will be text/plain
     |raw2audio -F < /usr/lib/sounds/giggle.au
 #image/gif   [photo of foobar] \\
                     /home/foobar/lib/picture.gif
     |raw2audio -F < /usr/lib/sounds/giggle.au
 #image/gif   [photo of foobar] \\
                     /home/foobar/lib/picture.gif

-.in -.5i

 .fi
 .fi

-.sp
-.Uh "Integrity Check"
-If \fImhbuild\fR is given the `-check' switch, then it will also associate
-an integrity check with each \*(lqleaf\*(rq content.  This will add a
-Content-MD5 header field to the content, along with the md5 sum of the
-unencoded contents.  This may be used by the receiver of the message to
-verify that the contents of the message were not changed in transport.
-
-.Uh "Transfer Encodings"
-After \fImhbuild\fR constructs the new MIME message by parsing directives,
+.RE
+.SS "Integrity Check"
+If
+.B mhbuild
+is given the
+.B \-check
+switch, then it will also associate an integrity check with each
+\*(lqleaf\*(rq content.  This will add a Content-MD5 header field to
+the content, along with the md5 sum of the unencoded contents, per RFC
+1864.  This may be used by the receiver of the message to verify that
+the contents of the message were not changed in transport.
+.SS "Transfer Encodings"
+After
+.B mhbuild
+constructs the new MIME message by parsing directives,

 including files, etc., it scans the contents of the message to determine
 which transfer encoding to use.  It will check for 8bit data, long lines,
 spaces at the end of lines, and clashes with multipart boundaries.  It will
 then choose a transfer encoding appropriate for each content type.
 including files, etc., it scans the contents of the message to determine
 which transfer encoding to use.  It will check for 8bit data, long lines,
 spaces at the end of lines, and clashes with multipart boundaries.  It will
 then choose a transfer encoding appropriate for each content type.

-
+.PP

 If an integrity check is being associated with each content by using
 If an integrity check is being associated with each content by using

-the `\-check' switch, then \fImhbuild\fR will encode each content with
-a transfer encoding, even it the content contains only 7bit data.  This
+the
+.B \-check
+switch, then
+.B mhbuild
+will encode each content with
+a transfer encoding, even it the content contains only 7\-bit data.  This

 is to increase the likelihood that the content is not changed while in
 transport.
 is to increase the likelihood that the content is not changed while in
 transport.

-
-The switch `\-ebcdicsafe' will cause \fImhbuild\fR to slightly change
-the way in which it performs the \*(lqquoted-printable\*(rq transfer
-encoding.  Along with encoding 8bit characters, it will now also encode
-certain common punctuation characters as well.  This slightly reduces the
-readability of the message, but allows the message to pass more reliably
-through mail gateways which involve the EBCDIC character encoding.
-
-.Uh "Invoking mhbuild"
-Typically, \fImhbuild\fR is invoked by the \fIwhatnow\fR program.  This
+.SS "Invoking mhbuild"
+Typically,
+.B mhbuild
+is invoked by the
+.B whatnow
+program.  This

 command will expect the body of the draft to be formatted as an
 command will expect the body of the draft to be formatted as an

-\fImhbuild\fR composition file.  Once you have composed this input file
-using a command such as \fIcomp\fR, \fIrepl\fR, or \fIforw\fR, you invoke
-\fImhbuild\fR at the \*(lqWhat now\*(rq prompt with
-.sp
-.in +.5i
+.B mhbuild
+composition file.  Once you have composed this input file
+using a command such as
+.BR comp ,
+.BR repl ,
+or
+.BR forw ,
+you invoke
+.B mhbuild
+at the \*(lqWhat now\*(rq prompt with
+.PP
+.RS 5

 What now? mime
 What now? mime

-.in -.5i
-.sp
-prior to sending the draft.  This will cause \fIwhatnow\fR to execute
-\fImhbuild\fR to translate the composition file into MIME format.
-
-It is also possible to have the \fIwhatnow\fR program invoke \fImhbuild\fR 
-automatically when a message is sent.  To do this, you must add the line
-.sp
-.in +.5i
-automimeproc: 1
-.in -.5i
-.sp
-to your \&.mh\(ruprofile file.
-
+.RE
+.PP
+prior to sending the draft.  This will cause
+.B whatnow
+to execute
+.B mhbuild
+to translate the composition file into MIME format.
+.PP
+Normally it is an error to invoke
+.B mhbuild
+on file that already in MIME format.  The 
+.B \-auto
+switch will cause
+.B mhbuild
+to exit without error if the input file already has valid MIME headers.
+The use of
+.B \-auto
+also enables the
+.B \-nodirectives
+switch.
+.PP

 Finally, you should consider adding this line to your profile:
 Finally, you should consider adding this line to your profile:

-.sp
-.in +.5i
+.PP
+.RS 5

 lproc: show
 lproc: show

-.in -.5i
-.sp
-This way, if you decide to \fBlist\fR after invoking \fImime\fR,
+.RE
+.PP
+This way, if you decide to
+.B list
+after invoking
+.BR mime ,

 the command
 the command

-.sp
-.in +.5i
+.PP
+.RS 5

 What now? list
 What now? list

-.in -.5i
-.sp
+.RE
+.PP

 will work as you expect.
 will work as you expect.

-
-.Uh "User Environment"
-Because the environment in which \fImhbuild\fR operates may vary for a
-user, \fImhbuild\fR will look for the environment variable \fB$MHBUILD\fR.
+.PP
+The
+.B \-dist
+switch is intended to be used by
+.BR dist .
+It will cause mhbuild to not generate any MIME headers in the composition
+file (such as \*(lqMIME-Version\*(rq or \*(lqContent-Type\*(rq), but it
+will still encode message headers according to RFC 2047.
+.SS "User Environment"
+Because the environment in which
+.B mhbuild
+operates may vary for a
+user,
+.B mhbuild
+will look for the environment variable
+.BR $MHBUILD .

 If present, this specifies the name of an additional user profile which
 should be read.  Hence, when a user logs in on a particular machine,
 this environment variable should be set to refer to a file containing
 definitions useful for that machine.
 If present, this specifies the name of an additional user profile which
 should be read.  Hence, when a user logs in on a particular machine,
 this environment variable should be set to refer to a file containing
 definitions useful for that machine.

-
-Finally, \fImhbuild\fR will attempt to consult a global \fImhbuild\fR
-user profile,
-.ne 6
-e.g.,
-.sp
-.in +.5i
+.PP
+Finally,
+.B mhbuild
+will attempt to consult a global
+.B mhbuild
+user profile, e.g.,
+.PP
+.RS 5

 %etcdir%/mhn.defaults
 %etcdir%/mhn.defaults

-.in -.5i
-.sp
+.RE
+.PP

 if it exists.
 if it exists.

-
-.Uh "Syntax of Composition Files"
-.ne 59
-The following is the formal syntax of a \fImhbuild\fR
+.SS "Syntax of Composition Files"
+The following is the formal syntax of a
+.B mhbuild

 \*(lqcomposition file\*(rq.
 \*(lqcomposition file\*(rq.

-.sp
+.PP
+.RS 5

 .nf
 .nf

-.in +.5i
-   body         ::=     1*(content | EOL)
-
-   content      ::=     directive | plaintext
-
-   directive    ::=     "#" type "/" subtype
-                            0*(";" attribute "=" value)
-                            [ "(" comment ")" ]
-                            [ "<" id ">" ]
-                            [ "[" description "]" ]
-                            [ filename ]
-                            EOL
-
-                      | "#@" type "/" subtype
-                            0*(";" attribute "=" value)
-                            [ "(" comment ")" ]
-                            [ "<" id ">" ]
-                            [ "[" description "]" ]
-                            external-parameters
-                            EOL
-
-                      | "#forw"
-                            [ "<" id ">" ]
-                            [ "[" description "]" ]
-                            [ "+"folder ] [ 0*msg ]
-                            EOL
-
-                      | "#begin"
-                              [ "<" id ">" ]
-                              [ "[" description "]" ]
-                              [   "alternative"
-                                | "parallel"
-                                | something-else    ]
-                              EOL
-                            1*body
-                        "#end" EOL
-
-   plaintext    ::=     [ "Content-Description:"
-                              description EOL EOL ]
-                            1*line
-                        [ "#" EOL ]
-
-                      | "#<" type "/" subtype
-                            0*(";" attribute "=" value)
-                            [ "(" comment ")" ]
-                            [ "[" description "]" ]
-                            EOL
-                            1*line
-                        [ "#" EOL ]
-
-   line         ::=     "##" text EOL
-                        -- interpreted as "#"text EOL
-                      | text EOL
-.in -.5i
+body         ::=     1*(content | EOL)
+
+content      ::=     directive | plaintext
+
+directive    ::=     "#" type "/" subtype
+                         0*(";" attribute "=" value)
+                         [ "(" comment ")" ]
+                         [ "<" id ">" ]
+                         [ "[" description "]" ]
+                         [ "{" disposition "}" ]
+                        [ "*8bit" | "*qp" | "*b64" ]
+                         [ filename ]
+                         EOL
+
+                   | "#@" type "/" subtype
+                         0*(";" attribute "=" value)
+                         [ "(" comment ")" ]
+                         [ "<" id ">" ]
+                         [ "[" description "]" ]
+                         [ "{" disposition "}" ]
+                        [ "*8bit" | "*qp" | "*b64" ]
+                         external-parameters
+                         EOL
+
+                   | "#forw"
+                         [ "<" id ">" ]
+                         [ "[" description "]" ]
+                         [ "{" disposition "}" ]
+                         [ "+"folder ] [ 0*msg ]
+                         EOL
+
+                   | "#begin"
+                           [ "<" id ">" ]
+                           [ "[" description "]" ]
+                           [ "{" disposition "}" ]
+                           [   "alternative"
+                             | "parallel"
+                             | something-else    ]
+                           EOL
+                         1*body
+                     "#end" EOL
+
+plaintext    ::=     [ "Content-Description:"
+                           description EOL EOL ]
+                         1*line
+                     [ "#" EOL ]
+
+                   | "#<" type "/" subtype
+                         0*(";" attribute "=" value)
+                         [ "(" comment ")" ]
+                         [ "[" description "]" ]
+                         [ "{" disposition "}" ]
+                        [ "*8bit" | "*qp" | "*b64" ]
+                         EOL
+                         1*line
+                     [ "#" EOL ]
+
+line         ::=     "##" text EOL
+                     -- interpreted as "#"text EOL
+                   | text EOL

 .fi
 .fi

-.sp
-.Fi
+.RE
+.SH FILES
+.B mhbuild
+looks for additional user profile files and mhn.defaults in multiple
+locations: absolute pathnames are accessed directly, tilde expansion
+is done on usernames, and files are searched for in the user's
+.I Mail
+directory as specified in their profile.  If not found there, the directory
+.RI \*(lq %etcdir% \*(rq
+is checked.
+.PP
+.fc ^ ~
+.nf
+.ta \w'%etcdir%/ExtraBigFileName  'u

 ^$HOME/\&.mh\(ruprofile~^The user profile
 ^$MHBUILD~^Additional profile entries
 ^%etcdir%/mhn.defaults~^System default MIME profile entries
 ^$HOME/\&.mh\(ruprofile~^The user profile
 ^$MHBUILD~^Additional profile entries
 ^%etcdir%/mhn.defaults~^System default MIME profile entries

-.Pr
+.fi
+.SH "PROFILE COMPONENTS"
+.fc ^ ~
+.nf
+.ta 2.4i
+.ta \w'ExtraBigProfileName  'u

 ^Path:~^To determine the user's nmh directory
 ^Path:~^To determine the user's nmh directory

-.Ps

 ^Current\-Folder:~^To find the default current folder
 ^Current\-Folder:~^To find the default current folder

-.Ps

 ^mhbuild-compose-<type>*~^Template for composing contents
 ^mhbuild-compose-<type>*~^Template for composing contents

-.Sa
-mhlist(1), mhshow(1), mhstore(1)
-.br
-RFC\-934:
-.br
-   \fIProposed Standard for Message Encapsulation\fR,
-.br
-RFC\-2045:
-.br
-   \fIMultipurpose Internet Mail Extensions (MIME) Part One:
-.br
-   Format of Internet Message Bodies\fR,
-.br
-RFC\-2046:
-.br
-   \fIMultipurpose Internet Mail Extensions (MIME) Part Two:
-.br
-   Media Types\fR,
-.br
-RFC\-2047:
-.br
-   \fIMultipurpose Internet Mail Extensions (MIME) Part Three:
-.br
-   Message Header Extensions for Non-ASCII Text\fR,
-.br
-RFC\-2048:
-.br
-   \fIMultipurpose Internet Mail Extensions (MIME) Part Four:
-.br
-   Registration Procedures\fR,
-.br
-RFC\-2049:
-.br
-   \fIMultipurpose Internet Mail Extensions (MIME) Part Five:
-.br
-   Conformance Criteria and Examples\fR.
-.De
-`\-headers'
-.Ds
-`\-realsize'
-.Ds
-`\-norfc934mode'
-.Ds
-`\-nocheck'
-.Ds
-`\-noebcdicsafe'
-.Ds
-`\-noverbose'
-.Co
-If a folder is given, it will become the current folder.  The last
-message selected will become the current message.
-.En
+.fi
+.SH "SEE ALSO"
+.IR mhlist (1),
+.IR mhshow (1),
+.IR mhstore (1)
+.PP
+.I "Proposed Standard for Message Encapsulation"
+(RFC 934),
+.PP
+.I "The Content-MD5 Header Field"
+(RFC 1864),
+.PP
+.I "Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies"
+(RFC 2045),
+.PP
+.I "Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types"
+(RFC 2046),
+.PP
+.I "Multipurpose Internet Mail Extensions (MIME) Part Three: Message Header Extensions for Non-ASCII Text"
+(RFC 2047),
+.PP
+.I "Multipurpose Internet Mail Extensions (MIME) Part Four: Registration Procedures"
+(RFC 2048),
+.PP
+.I "Multipurpose Internet Mail Extensions (MIME) Part Five: Conformance Criteria and Examples"
+(RFC 2049)
+.I "Definition of the URL MIME External-Body Access-Type"
+(RFC 2017)
+.SH DEFAULTS
+.nf
+.RB ` \-headers '
+.RB ` \-realsize '
+.RB ` \-norfc934mode '
+.RB ` \-contentid '
+.RB ` \-nocheck '
+.RB ` \-noverbose '
+.RB ` \-autoheaderencoding '
+.RB ` "\-maxunencoded\ 78"'
+.fi