Opened 15 months ago
Last modified 15 months ago
#18548 closed bug
recv(2) with AF_UNIX blocks upon empty receive buffer; MSG_NOWAIT ignored — at Initial Version
| Reported by: | kohlschuetter | Owned by: | axeld |
|---|---|---|---|
| Priority: | critical | Milestone: | R1/beta5 |
| Component: | Network & Internet/UDP | Version: | R1/beta4 |
| Keywords: | Cc: | ||
| Blocked By: | Blocking: | ||
| Platform: | All |
Description
When receiving datagrams via AF_UNIX, a buffer-empty condition prevents "recv" from returning immediately with an error when MSG_NOWAIT is set.
This prevents code relying on these features from working as expected.
A workaround is to define a receive timeout on the socket, however that may be brittle when receiving an existing socket via file descriptors, for example.
Related to #18539
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Example code demonstrating the bug