Provided by: exim_3.36-18ubuntu1_i386 bug


       exim_lock - A program to lock a file exactly as Exim would


       exim_lock [-v] [-q] [-lockfile] [-fcntl|-mbx] filename [command]


       exim_lock  is  a program to lock a file in exactly the same way as Exim
       would. It is intended for the investigation of  interlocking  problems,
       but  can also be used to prevent Exim from modifying the file while you
       do something else to it (for example if you need to manually edit  your
       mailbox in /var/mail).

       Apart  from specifying the name of the file to lock, which is required,
       the following optional arguments may also be supplied to exim_lock :

       -v     specifies verbose  mode  (this  is  overridden  if  -q  is  also

       -q     specifies quiet mode (takes precendence over -v );

       -fcntl specifies that exim_lock should use an fcntl lock;

              specifies  that  exim_lock  should  use  a  lock file (sometimes
              called a "dotlock");

       -mbx   specifies that exim_lock should lock using MBX rules.  To  quote
              from  the  source  of  exim_lock  ,  "This is complicated and is
              documented with the source of the  c-client  library  that  goes
              with  Pine  and IMAP. What has to be done to interwork correctly
              is to take out a shared lock on the mailbox,  and  an  exclusive
              lock on a /tmp file."

              specifies  the command to run once the specified file is locked.
              The mailbox will be unlocked again when this command exits.

       Note that if these parameters are not specified,  then  exim_lock  will
       lock the file using fcntl and lockfile methods, and then run a shell.



       There is also extensive documentation available in /usr/doc/exim and in
       the info system (try "info exim").

       Please be sure to have the exim-doc package installed.


       Exim was, and mostly is, written by Philip Hazel, inspired by  Smail 3.

       This manual page was written by Nick Phillips <>
       for the Debian GNU/Linux system.