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-- Topal: GPG/GnuPG and Alpine/Pine integration
-- Copyright (C) 2001--2009 Phillip J. Brooke
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License version 3 as
-- published by the Free Software Foundation.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
with Ada.Command_Line;
with Ada.Exceptions;
with Ada.Text_IO;
with Externals.Mail;
with Externals.Simple;
with Misc; use Misc;
with Version_ID;
package body Workaround is
-- Read on stdin, write on stdout.
-- Take a single email.
-- If simple, then simply change the MIME Content-Type.
-- If not simple, rewrite it in a multipart/misc wrapper.
procedure Fix_Email is
Stdin : constant String := Temp_File_Name("wfestdin");
CT : constant String := Temp_File_Name("wfect");
Output : constant String := Temp_File_Name("wfeoutput");
Input2 : constant String := Temp_File_Name("wfeinput");
Header2 : constant String := Temp_File_Name("wfeheader");
Body2 : constant String := Temp_File_Name("wfebody");
Part1A : constant String := Temp_File_Name("wfepart1a");
Part1 : constant String := Temp_File_Name("wfepart1");
Part2 : constant String := Temp_File_Name("wfepart2");
MCO : constant String := Temp_File_Name("wfemco");
MCO2 : constant String := Temp_File_Name("wfemco2");
Mangle : Boolean := False;
Encrypted : Boolean := False;
begin
-- First, save off the standard input into a temp file.
Debug("Saving off stdin...");
Externals.Simple.Cat_Stdin_Out(Stdin);
Debug("Done save off of stdin.");
-- Get the content-type line.
Externals.Mail.Formail_Concat_Extract_InOut("Content-Type:",
Stdin,
CT);
-- Sort out the Mangle and Encrypted flags.
if Externals.Simple.Grep_I_InOut("multipart/signed",
CT,
"/dev/null") = 0 then
Mangle := True;
elsif Externals.Simple.Grep_I_InOut("multipart/encrypted",
CT,
"/dev/null") = 0 then
Mangle := True;
Encrypted := True;
end if;
-- Do we mangle?
if Mangle then
if Config.Boolean_Opts(FE_Simple) then
-- Simple mangling.
if Encrypted then
Externals.Simple.Sed_InOut("1,/^[:space:]*$/ { s!^Content-Type: *multipart/encrypted!Content-Type: application/x-topal-encrypted! ; }",
Source => Stdin,
Target => Output);
Externals.Simple.Cat(Output);
else
Externals.Simple.Sed_InOut("1,/^[:space:]*$/ { s!^Content-Type: *multipart/signed!Content-Type: application/x-topal-signed! ; }",
Source => Stdin,
Target => Output);
Externals.Simple.Cat(Output);
end if;
else
-- Rewrite mangling.
-- Drop the content-type header.
Externals.Mail.Formail_Drop_InOut(UBS_Array'(1 => ToUBS("Content-Type:"),
2 => ToUBS("Content-Transfer-Encoding:"),
3 => ToUBS("MIME-Version:")),
Source => Stdin,
Target => Input2);
-- Split the header and body apart.
Externals.Mail.Extract_Header(Input2,
Header2);
Externals.Mail.Extract_Body(Input2,
Body2);
-- Now, create a new email: all the same headers, except the
-- removed content-type. The body is a multipart/mixed,
-- comprising just the (slightly modified) original body.
-- Create a simple body.
Externals.Simple.Echo_Out("Multipart email processed by Topal "
& Version_ID.Release & ".",
Part1A);
Externals.Mail.Mimeconstruct_Subpart(Infile => Part1A,
Outfile => Part1,
Content_Type => "text/plain",
Dos2UnixU => True,
Use_Encoding => False,
Encoding => "");
-- Create this modified body, which is the original email
-- with just the content-type header.
Externals.Simple.Echo_Out_N("Content-Type: ", Part2);
Externals.Simple.Cat_Append(CT, Part2);
Externals.Simple.Echo_Append("", Part2);
Externals.Simple.Cat_Append(Body2, Part2);
Externals.Mail.Mimeconstruct_Mixed(Filenames =>
UBS_Array'(1 => ToUBS(Part1),
2 => ToUBS(Part2)),
Outfile => MCO);
Externals.Simple.Cat_Out(Header2, Output);
Externals.Simple.Echo_Append("X-Mangled-By: topal "
& Version_ID.Release,
Output);
-- We don't want the first part of the multipart mixed.
Externals.Simple.Sed_InOut("5,9 d", MCO, MCO2);
Externals.Simple.Cat_Append(MCO2, Output);
Externals.Simple.Cat(Output);
end if;
else
-- Just output the original input.
Externals.Simple.Cat(Stdin);
end if;
Ada.Command_Line.Set_Exit_Status(Ada.Command_Line.Success);
exception
when The_Exception: others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Workaround.Fix_Email");
-- This is bad news. Write it all out to the emergency log.
declare
Log : constant String
:= ToStr(Topal_Directory) & "/workaround-error-log";
use Externals.Simple;
begin
Echo_Append(Integer'Image(Our_PID) &
"Exception raised in Workaround.Fix_Email",
Log);
Echo_Append(Integer'Image(Our_PID) &
"Exception raised: "
& Ada.Exceptions.Exception_Name(The_Exception),
Log);
Echo_Append(Integer'Image(Our_PID) &
Ada.Exceptions.Exception_Information(The_Exception),
Log);
end;
-- Dump put the original output. Let's hope that it all works okay.
Externals.Simple.Cat(Stdin);
raise;
end Fix_Email;
procedure Fix_Folder (Folder : in String;
Topal_Command : in String;
The_Date : in String) is
Backup_Name : constant String
:= Folder & ".topal-fix-folder-" & The_Date;
New_Name : constant String := Folder & ".topal-new";
begin
-- Backup.
Ada.Text_IO.Put_Line(" Backup file is `" & Backup_Name & "'");
Externals.Simple.Cat_Out(Folder, Backup_Name);
-- Invoke formail on this folder.
Externals.Mail.Formail_Action_InOut(Source => Folder,
Target => New_Name,
Action =>
Topal_Command & " --fix-email");
-- Do a diff.
if Externals.Simple.Diff_Brief(Folder, New_Name) then
Ada.Text_IO.Put_Line(" Made some changes!");
-- Overwrite original with mangled version.
Externals.Simple.Mv_F(New_Name, Folder);
else
Ada.Text_IO.Put_Line(" No changes made.");
Externals.Simple.Rm_File(New_Name);
end if;
-- Done.
Ada.Text_IO.Put_Line(" Finished with `" & Folder & "'");
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Workaround.Fix_Folder");
raise;
end Fix_Folder;
procedure Fix_Folders (Folders : in UBS_Array) is
Topal_Command : constant String := Ada.Command_Line.Command_Name;
The_Date : constant String := Externals.Simple.Date_String;
begin
-- Loop through each folder.
for I in Folders'Range loop
Ada.Text_IO.Put_Line("Processing folder `"
& ToStr(Folders(I)) & "'...");
Fix_Folder(ToStr(Folders(I)), Topal_Command, The_Date);
end loop;
Ada.Command_Line.Set_Exit_Status(Ada.Command_Line.Success);
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Workaround.Fix_Folders");
raise;
end Fix_Folders;
end Workaround;
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