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183 | -- Send email via /usr/bin/mail
-- Copyright (C)2020, Philip Munts, President, Munts AM Corp.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are met:
--
-- * Redistributions of source code must retain the above copyright notice,
-- this list of conditions and the following disclaimer.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-- ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
-- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-- POSSIBILITY OF SUCH DAMAGE.
WITH Ada.Directories;
WITH Ada.Text_IO;
WITH Ada.Text_IO.C_Streams;
WITH System;
WITH errno;
WITH libLinux;
PACKAGE BODY Email_Mail IS
MailProg : CONSTANT String := "/usr/bin/mail";
-- Mail relay object constructor
FUNCTION Create RETURN Messaging.Text.Relay IS
BEGIN
RETURN NEW RelaySubclass'(initialized => True);
END Create;
-- Mail relay object initializer
PROCEDURE Initialize(Self : IN OUT RelaySubclass) IS
BEGIN
Self.initialized := True;
END Initialize;
-- Mail relay object destroyer
PROCEDURE Destroy(Self : IN OUT RelaySubclass) IS
BEGIN
Self := Destroyed;
END Destroy;
-- Check whether mail relay object has been destroyed
PROCEDURE CheckDestroyed(Self : Relaysubclass) IS
BEGIN
IF Self = Destroyed THEN
RAISE Messaging.Text.RelayError WITH "Mail relay object has been destroyed";
END IF;
END CheckDestroyed;
PROCEDURE Dispatch
(Self : RelaySubclass;
parms : String;
message : String) IS
stream : System.Address;
error : Integer;
file : Ada.Text_IO.File_Type;
BEGIN
Self.CheckDestroyed;
libLinux.POpenWrite(MailProg & " " & parms & ASCII.NUL, stream, error);
IF error /= 0 THEN
RAISE Messaging.Text.RelayError WITH "libLinux.POpenWrite() failed, " &
errno.strerror(error);
END IF;
BEGIN
Ada.Text_IO.C_Streams.Open(file, Ada.Text_IO.Out_File, stream);
Ada.Text_IO.Put_Line(file, message);
Ada.Text_IO.Close(file); -- This works even though we are *supposed* to call pclose().
EXCEPTION
WHEN OTHERS =>
-- If something failed in Ada.Text_IO, we need to close the pipe...
libLinux.PClose(stream, error);
-- ...and then re-raise the exception.
RAISE;
END;
END Dispatch;
FUNCTION Quote(s : String) RETURN String IS
BEGIN
RETURN ASCII.QUOTATION & s & ASCII.QUOTATION;
END Quote;
FUNCTION PackSender(s : String) RETURN String IS
BEGIN
IF s = "" THEN
RETURN s;
ELSE
RETURN " -r " & Quote(s) & " ";
END IF;
END PackSender;
FUNCTION PackSubject(s : String) RETURN String IS
BEGIN
IF s = "" THEN
RETURN s;
ELSE
RETURN " -s " & Quote(s) & " ";
END IF;
END PackSubject;
FUNCTION PackAttachment(a : String) RETURN String IS
BEGIN
IF a = "" THEN
RETURN a;
ELSE
IF NOT Ada.Directories.Exists(a) THEN
RAISE Ada.Directories.Name_Error WITH "Attachment file does not exist";
END IF;
RETURN " -A " & Quote(a) & " ";
END IF;
END PackAttachment;
FUNCTION PackRecipient(r : String) RETURN String IS
BEGIN
IF r = "" THEN
RAISE Messaging.Text.RelayError WITH "Recipient cannot be empty string";
END IF;
RETURN Quote(r);
END PackRecipient;
-- Method for sending a message via a message relay
PROCEDURE Send
(Self : RelaySubclass;
sender : String;
recipient : String;
message : String;
subject : String;
attachment : String) IS
BEGIN
Self.CheckDestroyed;
Self.Dispatch(PackSender(sender) & PackSubject(subject) &
PackAttachment(attachment) & PackRecipient(recipient), message);
END Send;
PROCEDURE Send
(Self : RelaySubclass;
sender : String;
recipient : String;
message : String;
subject : String := "") IS
BEGIN
Self.CheckDestroyed;
Self.Dispatch(PackSender(sender) & PackSubject(subject) &
PackRecipient(recipient), message);
END Send;
END Email_Mail;
|