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-rw-r--r--script/mwrap-perl6
1 files changed, 6 insertions, 0 deletions
diff --git a/script/mwrap-perl b/script/mwrap-perl
index eb29176..371aee6 100644
--- a/script/mwrap-perl
+++ b/script/mwrap-perl
@@ -76,6 +76,10 @@ Dumps the output at exit to a given filename:
 
         total_bytes        call_count        location
 
+C<$FILENAME> may contain C<%p> where C<%p> is a placeholder for
+the PID being dumped.  No other use of C<%> is accepted, and
+multiple C<%> means all C<%> (including C<%p>) are handled as-is.
+
 =item dump_fd:$DESCRIPTOR
 
 As with dump_path, but dumps the output to a given file descriptor.
@@ -90,6 +94,8 @@ but is subject to change in future releases.
 C<dump_csv> without the C<:> may also be used in conjunction with
 C<dump_fd>, such as C<MWRAP=dump_fd:2,dump_csv>.
 
+Expands C<%p> to the PID in C<$FILENAME> as described for C<dump_path:>
+
 =back
 
 =head1 HTTP POST API