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-rw-r--r--internal/generate/classify.go8
-rw-r--r--internal/generate/classify_test.go4
2 files changed, 10 insertions, 2 deletions
diff --git a/internal/generate/classify.go b/internal/generate/classify.go
index c1125e5..3ba0c00 100644
--- a/internal/generate/classify.go
+++ b/internal/generate/classify.go
@@ -632,5 +632,11 @@ var retClassifications = map[string]RetClassification{
// UNCLASSIFIED so the stats engine never treats the return as bytes written.
"write": WriteClassified,
"writev": WriteClassified,
- "mq_timedsend": WriteClassified,
+ // mq_timedsend is deliberately NOT listed here: mq_timedsend(2)/mq_send(3)
+ // return 0 on success or -1 on error — NOT a byte count (msg_len is an
+ // INPUT arg, never the return). Listing it as WriteClassified made
+ // bytesFromRet attribute its 0 return as "bytes written". Like its POSIX mq
+ // sibling mq_timedreceive (which genuinely returns the received byte count
+ // and stays ReadClassified), mq_timedsend's int status must stay
+ // UNCLASSIFIED. This mirrors the SysV IPC msgsnd vs msgrcv asymmetry.
}
diff --git a/internal/generate/classify_test.go b/internal/generate/classify_test.go
index bd03af4..4993293 100644
--- a/internal/generate/classify_test.go
+++ b/internal/generate/classify_test.go
@@ -350,7 +350,9 @@ func TestClassifyMqSyscallPairsAcceptedAndClassified(t *testing.T) {
}{
{"mq_open", "struct open_event", "UNCLASSIFIED"},
{"mq_unlink", "struct path_event", "UNCLASSIFIED"},
- {"mq_timedsend", "struct fd_event", "WRITE_CLASSIFIED"},
+ // mq_timedsend returns 0/-1 (a status), not a byte count, so its ret is
+ // UNCLASSIFIED. Only mq_timedreceive returns a real received byte count.
+ {"mq_timedsend", "struct fd_event", "UNCLASSIFIED"},
{"mq_timedreceive", "struct fd_event", "READ_CLASSIFIED"},
{"mq_notify", "struct fd_event", "UNCLASSIFIED"},
{"mq_getsetattr", "struct fd_event", "UNCLASSIFIED"},