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 abd9dcbca88cb0caeb3fe8c9a08877f38fbe44fb..db80e232d6d39388874d66e5399bb420562ca19b 100644 (file)
--- a/man/mhbuild.man
+++ b/man/mhbuild.man
@@ -1,4 +1,4 @@
-.TH MHBUILD %manext1% "March 21, 2013" "%nmhversion%"
+.TH MHBUILD %manext1% "January 23, 2014" "%nmhversion%"
 .\"
 .\" %nmhwarning%
 .\"
@@ -21,6 +21,8 @@ mhbuild \- translate MIME composition draft
 .RB [ \-headerencoding 
 .IR encoding\-algorithm
 .RB " | " \-autoheaderencoding ]
+.RB [ \-maxunencoded
+.IR line\-length ]
 .RB [ \-dist ]
 .RB [ \-version ]
 .RB [ \-help ]
@@ -79,6 +81,21 @@ switch
 is present, then the listing will show any \*(lqextra\*(rq information
 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
@@ -386,6 +403,18 @@ characters.  The
 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
@@ -449,13 +478,22 @@ 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
 .B mhbuild
 will assume the character set is of the type given by the
-environment variable MM_CHARSET.  If this environment variable is not
+standard
+.IR locale (1)
+environment variables.  If these environment variables are not
 set, then the character set will be labeled as \*(lqx-unknown\*(rq.
 .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
 \*(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
@@ -554,6 +592,11 @@ on file that already in MIME format.  The
 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:
 .PP
@@ -621,6 +664,7 @@ directive    ::=     "#" type "/" subtype
                          [ "<" id ">" ]
                          [ "[" description "]" ]
                          [ "{" disposition "}" ]
+                        [ "*8bit" | "*qp" | "*b64" ]
                          [ filename ]
                          EOL
 
@@ -630,6 +674,7 @@ directive    ::=     "#" type "/" subtype
                          [ "<" id ">" ]
                          [ "[" description "]" ]
                          [ "{" disposition "}" ]
+                        [ "*8bit" | "*qp" | "*b64" ]
                          external-parameters
                          EOL
 
@@ -661,6 +706,7 @@ plaintext    ::=     [ "Content-Description:"
                          [ "(" comment ")" ]
                          [ "[" description "]" ]
                          [ "{" disposition "}" ]
+                        [ "*8bit" | "*qp" | "*b64" ]
                          EOL
                          1*line
                      [ "#" EOL ]
@@ -732,4 +778,5 @@ is checked.
 .RB ` \-nocheck '
 .RB ` \-noverbose '
 .RB ` \-autoheaderencoding '
+.RB ` "\-maxunencoded\ 78"'
 .fi