errno 111 (EIDRM): meaning and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: A UCRT POSIX compatibility errno for an operation whose System V IPC identifier was removed while it was in use.

Could be also:
Constant	Type	OS
ERROR_BUFFER_OVERFLOW	Win32 error	Windows
ECONNREFUSED	errno	Linux
SESSION3_INITIALIZATION_FAILED	BugCheck Code	Windows
VSL_INITIALIZATION_FAILED	BugCheck Code	Windows

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EHOSTUNREACH	EINPROGRESS

EIDRM

EIDRM is a UCRT POSIX compatibility constant whose established meaning comes from System V IPC. It indicates that an operation used an IPC identifier which was removed while the caller was waiting or performing the operation.

This is different from “there is no matching message.” The object existed long enough for a caller to address it, then its lifetime ended. Retrying the same numeric identifier is not a recovery strategy: an application must follow its ownership rules, discover or create the replacement object, and re-establish any required permissions or state.

Diagnostic questions

Which queue, semaphore set, or shared-memory object owned the identifier?
Which process or cleanup path removed it, and was removal expected during shutdown or redeploy?
Was a blocked receiver or sender awakened by the removal?
Does the application have a generation, name-service, or supervisor step that safely supplies a replacement object?

Windows UCRT publishes this name for POSIX compatibility; it does not convert a raw Windows handle value into a System V IPC diagnosis. Preserve the actual API and runtime layer that produced the status.

References

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