Function xmlCatalogGetSystem 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn xmlCatalogGetSystem(
    sysID: *const xmlChar,
) -> *const xmlChar

Deprecated global accessors (upstream xmlCatalogGetSystem/GetPublic return the resolved value as const xmlChar*).

SAFETY

• sysID must point to valid NUL-terminated strings (or NULL where the C contract allows) for the lifetime of the call.

The caller must not race this call with concurrent mutation of the same objects from other threads (per-object state is not internally synchronized). Violating any of the above is undefined behavior.

Exercised by the C-API differential courts (courts/suites/data-abi/*-family-probe.c) and the CLI differential courts; those pass byte-for-byte against the upstream oracle.