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-rw-r--r--src/input/input_plugin.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/input/input_plugin.h b/src/input/input_plugin.h
index 370dc6a71..11e1303e7 100644
--- a/src/input/input_plugin.h
+++ b/src/input/input_plugin.h
@@ -115,6 +115,8 @@ struct input_plugin_s {
/*
* read nlen bytes, return number of bytes read
+ * Should block until some bytes available for read;
+ * a return value of 0 indicates no data available
*/
off_t (*read) (input_plugin_t *this, char *buf, off_t nlen);