Update $message_linecount for maildir_tag.

Patch from Mark Zealey.
Fixes bug 1055.

7 files changed, 36 insertions, 6 deletions

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index bc9dd2e14..15f104d2b 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -11137,8 +11137,15 @@ number of lines received. Before delivery happens (that is, before filters,
 routers, and transports run) the count is increased to include the
 &'Received:'& header line that Exim standardly adds, and also any other header
 lines that are added by ACLs. The blank line that separates the message header
-from the body is not counted. Here is an example of the use of this variable in
-a DATA ACL:
+from the body is not counted.
+
+As with the special case of &$message_size$&, during the expansion of the
+appendfile transport's maildir_tag option in maildir format, the value of
+&$message_linecount$& is the precise size of the number of newlines in the
+file that has been written (minus one for the blank line between the
+header and the body).
+
+Here is an example of the use of this variable in a DATA ACL:
 .code
 deny message   = Too many lines in message header
      condition = \
diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index 862f1b887..1fd7bd3cf 100644
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -60,6 +60,9 @@ PP/10 Use sig_atomic_t for flags set from signal handlers.
       Fixed developed for diagnosis in bug 927 (which turned out to be
       a kernel bug).
 
+PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
+      Patch from Mark Zealey.
+
 
 Exim version 4.74
 -----------------
diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff
index 6159bf443..7ae550bb4 100644
--- a/doc/doc-txt/NewStuff
+++ b/doc/doc-txt/NewStuff
@@ -25,6 +25,10 @@ Version 4.75
  3. Log filenames may now use %M as an escape, instead of %D (still available).
     The %M pattern expands to yyyymm, providing month-level resolution.
 
+ 4. The $message_linecount variable is now updated for the maildir_tag option,
+    in the same way as $message_size, to reflect the real number of lines,
+    including any header additions or removals from transport.
+
 
 Version 4.74
 ------------
diff --git a/src/src/globals.c b/src/src/globals.c
index 60ef8e0a8..fe3a2eeb5 100644
--- a/src/src/globals.c
+++ b/src/src/globals.c
@@ -1254,6 +1254,7 @@ transport_instance  transport_defaults = {
 };
 
 int     transport_count;
+int     transport_newlines;
 uschar **transport_filter_argv  = NULL;
 int     transport_filter_timeout;
 BOOL    transport_filter_timed_out = FALSE;
diff --git a/src/src/globals.h b/src/src/globals.h
index 1f0463264..b0c26c425 100644
--- a/src/src/globals.h
+++ b/src/src/globals.h
@@ -785,6 +785,7 @@ extern int     thismessage_size_limit; /* Limit for this message */
 extern int     timeout_frozen_after;   /* Max time to keep frozen messages */
 extern BOOL    timestamps_utc;         /* Use UTC for all times */
 extern int     transport_count;        /* Count of bytes transported */
+extern int     transport_newlines;     /* Accurate count of number of newline chars transported */
 extern uschar **transport_filter_argv; /* For on-the-fly filtering */
 extern int     transport_filter_timeout; /* Timeout for same */
 extern BOOL    transport_filter_timed_out; /* True if it did */
diff --git a/src/src/transport.c b/src/src/transport.c
index e68a24dcb..504ef9e06 100644
--- a/src/src/transport.c
+++ b/src/src/transport.c
@@ -426,6 +426,7 @@ for (ptr = start; ptr < end; ptr++)
 
     if (use_crlf) *chunk_ptr++ = '\r';
     *chunk_ptr++ = '\n';
+    transport_newlines++;
 
     /* The check_string test (formerly "from hack") replaces the specific
     string at the start of a line with an escape string (e.g. "From " becomes
diff --git a/src/src/transports/appendfile.c b/src/src/transports/appendfile.c
index e53761582..6dbb35262 100644
--- a/src/src/transports/appendfile.c
+++ b/src/src/transports/appendfile.c
@@ -2782,6 +2782,7 @@ if (yield == OK && ob->mbx_format)
 functions. */
 
 transport_count = 0;
+transport_newlines = 0;
 
 /* Write any configured prefix text first */
 
@@ -2807,21 +2808,26 @@ file, use its parent in the RCPT TO. */
 if (yield == OK && ob->use_bsmtp)
   {
   transport_count = 0;
+  transport_newlines = 0;
   if (ob->use_crlf) cr = US"\r";
   if (!transport_write_string(fd, "MAIL FROM:<%s>%s\n", return_path, cr))
     yield = DEFER;
   else
     {
     address_item *a;
+    transport_newlines++;
     for (a = addr; a != NULL; a = a->next)
       {
       address_item *b = testflag(a, af_pfr)? a->parent: a;
       if (!transport_write_string(fd, "RCPT TO:<%s>%s\n",
         transport_rcpt_address(b, tblock->rcpt_include_affixes), cr))
           { yield = DEFER; break; }
+      transport_newlines++;
       }
     if (yield == OK && !transport_write_string(fd, "DATA%s\n", cr))
       yield = DEFER;
+    else
+      transport_newlines++;
     }
   }
 
@@ -2854,8 +2860,10 @@ if (yield == OK && ob->message_suffix != NULL && ob->message_suffix[0] != 0)
 
 /* If batch smtp, write the terminating dot. */
 
-if (yield == OK && ob->use_bsmtp &&
-  !transport_write_string(fd, ".%s\n", cr)) yield = DEFER;
+if (yield == OK && ob->use_bsmtp ) {
+  if(!transport_write_string(fd, ".%s\n", cr)) yield = DEFER;
+  else transport_newlines++;
+}
 
 /* If MBX format is being used, all that writing was to the temporary file.
 However, if there was an earlier failure (Exim quota exceeded, for example),
@@ -2873,6 +2881,8 @@ if (temp_file != NULL && ob->mbx_format)
   if (yield == OK)
     {
     transport_count = 0;   /* Reset transport count for actual write */
+    /* No need to reset transport_newlines as we're just using a block copy
+     * routine so the number won't be affected */
     yield = copy_mbx_message(fd, fileno(temp_file), saved_size);
     }
   else if (errno >= 0) dataname = US"temporary file";
@@ -2890,10 +2900,13 @@ fsync() to be called for a FIFO. */
 
 if (yield == OK && !isfifo && EXIMfsync(fd) < 0) yield = DEFER;
 
-/* Update message_size to the accurate count of bytes written, including
-added headers. */
+/* Update message_size and message_linecount to the accurate count of bytes
+written, including added headers. Note; we subtract 1 from message_linecount as
+this variable doesn't count the new line between the header and the body of the
+message. */
 
 message_size = transport_count;
+message_linecount = transport_newlines - 1;
 
 /* If using a maildir++ quota file, add this message's size to it, and
 close the file descriptor, except when the quota has been disabled because we