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EUI64 (3) \| C library functions \| Unix Manual Pages \| :man▋ NAME eui64, eui64_aton, eui64_ntoa, eui64_ntohost, eui64_hostton - IEEE EUI-64 conversion and lookup routines CONTENTS Library Synopsis Description Return Values Notes Nis Interaction See Also History Bugs LIBRARY .Lb libc SYNOPSIS .In sys/types.h .In sys/eui64.h int `eui64_aton "const char a" "struct eui64 e"` int `eui64_ntoa "const struct eui64 id" "char a" "size_t len"` int `eui64_ntohost "char hostname" "size_t len" "const struct eui64 id"` int `eui64_hostton "const char hostname" "struct eui64 id"` DESCRIPTION These functions operate on IEEE EUI-64s using an .Vt eui64 structure, which is defined in the header file .In sys/eui64.h : /* * The number of bytes in an EUI-64. / #define EUI64_LEN8 / * Structure of an IEEE EUI-64. / struct eui64 { u_char octet[EUI64_LEN]; }; The `eui64_aton` function converts an ASCII* representation of an EUI-64 into an .Vt eui64 structure. Likewise, `eui64_ntoa` converts an EUI-64 specified as an .Vt eui64 structure into an ASCII string. The `eui64_ntohost` and `eui64_hostton` functions map EUI-64s to their corresponding hostnames as specified in the `/etc/eui64` database. The `eui64_ntohost` function converts from EUI-64 to hostname, and `eui64_hostton` converts from hostname to EUI-64. RETURN VALUES On success, `eui64_ntoa` returns a pointer to a string containing an ASCII representation of an EUI-64. If it is unable to convert the supplied .Vt eui64 structure, it returns a `NULL` pointer. Likewise, `eui64_aton` returns a pointer to an .Vt eui64 structure on success and a `NULL` pointer on failure. The `eui64_ntohost` and `eui64_hostton` functions both return zero on success or non-zero if they were unable to find a match in the `/etc/eui64` database. NOTES The user must insure that the hostname strings passed to the `eui64_ntohost` and `eui64_hostton` functions are large enough to contain the returned hostnames. NIS INTERACTION If the `/etc/eui64` contains a line with a single ‘`+`’ in it, the `eui64_ntohost` and `eui64_hostton` functions will attempt to consult the NIS `eui64.byname` and `eui64.byid` maps in addition to the data in the `/etc/eui64` file. SEE ALSO firewire(4), eui64(5), yp(8) HISTORY ethers(3) BUGS

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