https://issues.apache.org/bugzilla/show_bug.cgi?id=51285

             Bug #: 51285
           Summary: [PATCH] rotatelogs: Add -p option to call arbitrary
                    post-rotate program
           Product: Apache httpd-2
           Version: 2.3-HEAD
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: support
        AssignedTo: [email protected]
        ReportedBy: [email protected]
    Classification: Unclassified


rotatelogs: Add -p option to call arbitrary post-rotate program.

Post rotation, call the optional post-rotation program in a separate
thread. apr_proc_create() is called with cmdtype APR_PROGRAM, so it
has to be an executable file. Scripts are supported as long as the
shebang line uses a working interpreter.

The post-rotation program is run with equivalent arguments and
environment variables to let users choose:

argv[1]: Full path to current file
argv[2]: Full path to previous file
Env var ROTATELOGS_PATH_CUR: Full path to current file
Env var ROTATELOGS_PATH_PREV: Full path to previous file

Notes:
The original motivation for this was to have a flexible callback
to be able to maintain a current access.log symlink, and also
do event-based (vs cron-based) compression and archival/upload
to central systems.

Thread support is required and assumed. It's not clear to me how
important it would be to also support non-threaded systems. Adding
a fork-based solution (APR_HAS_THREADS) can be done rather quickly,
if needed.

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