27 Input/output library [input.output]

27.11 File systems [filesystems]

27.11.14 Filesystem operation functions [fs.op.funcs]

27.11.14.15 Hard link count [fs.op.hard_lk_ct]

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