freebsd-skq/usr.bin/mail/misc/mail.tildehelp
mikeh 45093b4f56 Add support for ~_, ~x, ~i, ~a, ~A, ~<, and ~r! tilde-escapes. Improve
tilde-escapes documentation.

Mostly obtained from:	NetBSD
2001-12-22 22:16:48 +00:00

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The following ~ escapes are defined:
~? Print this message
~~ Quote a single tilde
~. Same as .
~A Equivalent to: ~i Sign
~a Equivalent to: ~i sign
~b users Add users to "blind" cc list
~c users Add users to cc list
~C Dump core
~d Read in dead.letter
~e Edit the message buffer
~f messages Read in messages
~F messages Same as ~f, but keep all header lines
~h Prompt for to list, subject and cc list
~i name Insert the value of the named variable
~m messages Read in messages, right shifted by a tab
~M messages Same as ~m, but keep all header lines
~p Print the message buffer
~q Quit, save partial message in dead.letter
~r file Read a file into the message buffer
~r !command Insert the output of the command in the message
~< file Same as ~r
~< !command Same as ~r
~R address Set reply-to
~s subject Set subject
~t users Add users to the To list
~v Invoke display editor on message
~w file Write message onto file.
~x Quit, do not save to dead.letter
~? Print this message
~! command Invoke the shell
~| command Pipe the message through the command
~^ command Same as ~|
~_ mail-cmd Perform the command-level request
~: mail-cmd Same as ~_
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