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Update woefully-obsolete comment.

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The accurate info about what's in a lock file has been in miscadmin.h
for some time, so let's just make this comment point there instead of
maintaining a duplicative copy.
This commit is contained in:
Tom Lane 2012-05-21 22:10:40 -04:00
parent cdf8bcb8d9
commit efae4653c9
1 changed files with 4 additions and 12 deletions
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16
src/backend/utils/init/miscinit.c
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@ -629,18 +629,10 @@ GetUserNameFromId(Oid roleid)
*
* These routines are used to create both a data-directory lockfile
* ($DATADIR/postmaster.pid) and a Unix-socket-file lockfile ($SOCKFILE.lock).
* Both kinds of files contain the same info:
*
* Owning process' PID
* Data directory path
*
* By convention, the owning process' PID is negated if it is a standalone
* backend rather than a postmaster. This is just for informational purposes.
* The path is also just for informational purposes (so that a socket lockfile
* can be more easily traced to the associated postmaster).
*
* A data-directory lockfile can optionally contain a third line, containing
* the key and ID for the shared memory block used by this postmaster.
* Both kinds of files contain the same info initially, although we can add
* more information to a data-directory lockfile after it's created, using
* AddToDataDirLockFile(). See miscadmin.h for documentation of the contents
* of these lockfiles.
*
* On successful lockfile creation, a proc_exit callback to remove the
* lockfile is automatically created.