On 23. aug. 2006, at 23.23, Mark Crispin wrote:
* Mark: when MIX is released and we work on migrating users to it,
will it be at all possible to convert an mbx -> mix and preserve
both the UIDs and the UID Validity settings? I know you have -
kwcopy in the new mailutil. Can it be possible to do something
similar for uid/uidvalidity?
It isn't be possible to do this with the distributed version of
mailutil. I consider it to be too special purpose, and too
dangerous, to be something that I am comfortable with putting in
the distributed version. However, it shouldn't be a particularly
difficult change to make as a local hack.
For example, the following is a disgusting kludge, but it should do
the trick. You probably want to do this in a separate copy of the
source code just for this special hacked version of mailutil.
(1) Create two new global variables in mailutil.c, newuidvalidity
and newuidlast.
(2) Early in routine mbxcopy() in mailutil.c, do
newuidvalidity = source->uid_validity;
newuidlast = source->uid_last;
(3) In mix.c, prototype newuidvalidity and newuidlast as extern.
(4) In mix_create() in mix.c, change
fprintf (f,MTAFMT,now,0,now);
to
fprintf (f,MTAFMT,newuidvalidity,0,now);
(5) Finally, in mix_append(), just before the lines that read:
ret = (mix_meta_update (astream) &&
mix_index_update (astream,&idxf,LONGT) &&
mix_status_update (astream,&statf,LONGT));
add
if (astream->uid_last <= newuidlast) aastream->uid_last =
newuidlast;
Please let me know how it goes.
Thank you very much for this recipe!
We are about to convert our historic mbox over NFS system to
distributed MBX and I determined that something like this had to be
done in my migration setup. I had not even started to look through
the source code to find where and how.
You just saved me alot of time :-)
Here is the UIDVALIDITY / UIDLAST patch I plan on using for MBX, I
know it is of no use to you, but maby someone on the list will find
it usefull.
diff -ru imap-2006.DEV.SNAP-0608311346.org/src/mailutil/mailutil.c
imap-2006.DEV.SNAP-0608311346/src/mailutil/mailutil.c
--- imap-2006.DEV.SNAP-0608311346.org/src/mailutil/mailutil.c
2006-08-31 02:22:00.000000000 +0200
+++ imap-2006.DEV.SNAP-0608311346/src/mailutil/mailutil.c
2006-09-13 21:44:39.000000000 +0200
@@ -47,6 +47,7 @@
char *suffix = NIL; /* suffer merge mode suffix text */
int ddelim = -1; /* destination delimiter */
FILE *f = NIL;
+extern unsigned long new_uid_validity, new_uid_last;
/* Merge modes */
@@ -419,6 +420,8 @@
char *ndst = NIL;
int ret = NIL;
trycreate = NIL; /* no TRYCREATE yet */
+ new_uid_validity = source->uid_validity;
+ new_uid_last = source->uid_last;
if (create) while (!mail_create (dest,dst) && (mode != mAPPEND)) {
switch (mode) {
case mPROMPT: /* prompt user for new name */
diff -ru imap-2006.DEV.SNAP-0608311346.org/src/osdep/unix/mbx.c
imap-2006.DEV.SNAP-0608311346/src/osdep/unix/mbx.c
--- imap-2006.DEV.SNAP-0608311346.org/src/osdep/unix/mbx.c
2006-08-31 03:41:45.000000000 +0200
+++ imap-2006.DEV.SNAP-0608311346/src/osdep/unix/mbx.c 2006-09-13
21:45:59.000000000 +0200
@@ -47,6 +47,7 @@
#include "dummy.h"
#include "fdstring.h"
+unsigned long new_uid_validity, new_uid_last;
/* Build parameters */
@@ -380,8 +381,9 @@
}
else {
memset (tmp,'\0',HDRSIZE);/* initialize header */
- sprintf (s = tmp,"*mbx*\015\012%08lx00000000\015\012",
- (unsigned long) time (0));
+ sprintf (s = tmp,"*mbx*\015\012%08lx%08lx\015\012",
+ (unsigned long) new_uid_validity,
+ (unsigned long) new_uid_last);
for (i = 0; i < NUSERFLAGS; ++i) {
t = (stream && stream->user_flags[i]) ? stream->user_flags[i] :
((t = default_user_flag (i)) ? t : "");
@@ -1176,6 +1178,10 @@
if (au && ret) (*au) (mailbox,dstream->uid_validity,dst);
else mail_free_searchset (&dst);
fseek (df,15,SEEK_SET); /* update UIDLAST */
+
+ if (dstream->uid_last <= new_uid_last)
+ dstream->uid_last = new_uid_last;
+
fprintf (df,"%08lx",dstream->uid_last);
/* set atime to now-1 if successful
copy */
if (ret) tp[0] = time (0) - 1;
--
Frode Nordahl
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