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-rw-r--r--docs/telepathy-gabble.8.in3
1 files changed, 3 insertions, 0 deletions
diff --git a/docs/telepathy-gabble.8.in b/docs/telepathy-gabble.8.in
index 6c6e95458..e00f75373 100644
--- a/docs/telepathy-gabble.8.in
+++ b/docs/telepathy-gabble.8.in
@@ -22,6 +22,9 @@ There are no command-line options.
.TP
\fBGABBLE_LOGFILE\fR=\fIfilename\fR
If set, debug output will go to the given file rather than to stderr.
+If \fB+\fR is prepended to the \fIfilename\fR (e.g.
+\fBGABBLE_LOGFILE=+gabble.log\fR), debug output will be appended
+to the file; otherwise, any existing file will be replaced.
.TP
\fBGABBLE_DEBUG\fR=\fItype\fR
May be set to "all" for full debug output, or various undocumented options