What does errno 81 (ELIBSCN) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: a legacy a.out library section was corrupted.

Could be also:
Constant	Type	OS
ENEEDAUTH	errno	Mac
EBADFD	errno	Solaris
REGISTRY_ERROR	BugCheck Code	Windows

Previous	Next
ENOTUNIQ	ENEEDAUTH

ELIBSCN

ELIBSCN is explicitly tied to a corrupted .lib section in an a.out-style object. That makes it a legacy binary-format diagnostic rather than a broad modern ELF loader error.

A useful page for this code should therefore not pretend that every shared-object problem returns ELIBSCN. If it appears, confirm the binary format and compatibility path first. For normal ELF failures, look at execve(), the ELF interpreter, and dynamic linker diagnostics instead.

Diagnostic boundary

Confirm whether the file is actually a.out or a compatibility format.
Preserve the exact binary and library file before replacement.
Check whether an old compatibility loader or emulator is involved.
Do not apply generic network, permission, or retry fixes to a structural binary-format failure.

Linux execve(2) · Linux errno(3) · Linux UAPI errno definitions

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