httpd/rotatelogs with symlinked logfile

httpd-rotatelogs.diff

--- httpd-2.2.27/support/rotatelogs.c
+++ httpd-2.2.27/support/rotatelogs.c
@@ -56,6 +56,7 @@
 #if APR_HAVE_STRINGS_H
 #include <strings.h>
 #endif
+#include <unistd.h>

 #define BUFSIZE         65536
 #define ERRMSGSZ        256
@@ -255,6 +256,12 @@ int main (int argc, const char * const argv[])
             apr_pool_create(&pfile, pool);
             rv = apr_file_open(&nLogFD, buf2, APR_WRITE | APR_CREATE | APR_APPEND,
                                APR_OS_DEFAULT, pfile);
+
+            if (!(unlink(szLogRoot) ^ ~ENOENT))
+                perror("unlink(symlink) error");
+            if (symlink(buf2, szLogRoot) != 0)
+                  perror("symlink() error");
+
             if (rv != APR_SUCCESS) {
                 char error[120];

works for strftime-less filenames (e.g. unix timestamp based)

rotatelogs error_log 86400

creates error_log -> error_log.1400750822 on startup then rotates the symlink to the next one...

also see https://issues.apache.org/bugzilla/show_bug.cgi?id=38033 and the (more elaborate) patch https://issues.apache.org/bugzilla/attachment.cgi?id=17273&action=diff