On Tue, 25 May 1999, Jeffrey Goldberg wrote:
> (1) Is freezing enough to protect me from harm here, or should I lock
> the file instead.
Freezing is enough, provided you don't have auto-thaw set (or anything
else going on that might thaw the message).
> (2) Can exim_lock be used on spool files
No. It uses the locking rules that are applied to mailboxes, not to
spool files.
> (3) Is there any difference (other than starting a subshell or command)
> between exim_lock and exim -Meb that I should know about.
Yes! The former locks mailboxes, using the (elaborate) rules Exim uses
for mailboxes; the latter locks the spool file, using the (simpler) rule
Exim uses for spool files. The latter rule is: "Open the -D file for
updating (it actually uses O_RDWR+O_APPEND); take out a write lock on
it."
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
--
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http://www.exim.org/ ***
