What does errno 35 (ENOMSG) in Solaris mean?

ENOMSG

System v message queue selection

ENOMSG is Solaris errno 35 (No message of desired type). A Solaris System V message-queue operation found no message matching the requested type.

For System V queues, preserve the requested message type and selection flags together with the queue contents at the failure point. A queue can contain messages while still having no entry that satisfies the caller's requested type.

What to check

• Inspect the msgrcv message type, IPC_NOWAIT flag, and queue contents.
• If the queue was removed, expect EIDRM rather than this errno.
• Do not retry blindly unless another producer is expected to enqueue the desired message type.

References

• Oracle Solaris intro(2): error numbers
• illumos errno.h definitions
• POSIX errno.h