30 Input/output library [input.output]

30.10 File systems [filesystems]

30.10.14 Filesystem operation functions [fs.op.funcs]

30.10.14.15 Hard link count [fs.op.hard_lk_ct]

uintmax_t hard_link_count(const path& p); uintmax_t hard_link_count(const path& p, error_code& ec) noexcept;
Returns: The number of hard links for p.
The signature with argument ec returns static_­cast<uintmax_­t>(-1) if an error occurs.
Throws: As specified in [fs.err.report].