ETHER_ATON man page on YellowDog

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ETHER_ATON(3)		   Linux Programmer's Manual		 ETHER_ATON(3)

NAME
       ether_aton,   ether_ntoa,   ether_ntohost,  ether_hostton,  ether_line,
       ether_ntoa_r, ether_aton_r - Ethernet address manipulation routines

SYNOPSIS
       #include <netinet/ether.h>

       char *
       ether_ntoa(const struct ether_addr *addr);

       struct ether_addr *
       ether_aton(const char *asc);

       int
       ether_ntohost(char *hostname, const struct ether_addr *addr);

       int
       ether_hostton(const char *hostname, struct ether_addr *addr);

       int
       ether_line(const char *line, struct ether_addr *addr,
	   char *hostname);

       /* GNU extensions */
       char *
       ether_ntoa_r(const struct ether_addr *addr, char *buf);

       struct ether_addr *
       ether_aton_r(const char *asc, struct ether_addr *addr);

DESCRIPTION
       ether_aton() converts the 48-bit Ethernet host  address	asc  from  the
       standard	 hex-digits-and-colons	notation  into	binary data in network
       byte order and returns a pointer to it in a statically  allocated  buf‐
       fer,  which  subsequent calls will overwrite. ether_aton() returns NULL
       if the address is invalid.

       The ether_ntoa() function converts the Ethernet host address addr given
       in  network  byte  order	 to a string in standard hex-digits-and-colons
       notation, omitting leading zeroes.  The string is returned in a	stati‐
       cally allocated buffer, which subsequent calls will overwrite.

       The  ether_ntohost()  function  maps  an Ethernet address to the corre‐
       sponding hostname in /etc/ethers and returns non-zero if it  cannot  be
       found.

       The  ether_hostton() function maps a hostname to the corresponding Eth‐
       ernet address in /etc/ethers and	 returns  non-zero  if	it  cannot  be
       found.

       The ether_line() function parses a line in /etc/ethers format (ethernet
       address followed by whitespace followed by hostname; '#'	 introduces  a
       comment)	 and  returns  an address and hostname pair, or non-zero if it
       cannot be parsed.  The buffer pointed to by  hostname  must  be	suffi‐
       ciently long, e.g., have the same length as line.

       The  functions ether_ntoa_r() and ether_aton_r() are re-entrant thread‐
       safe versions of ether_ntoa() and ether_aton() respectively, and do not
       use static buffers.

       The structure ether_addr is defined in net/ethernet.h as:

	      struct ether_addr {
		u_int8_t ether_addr_octet[6];
	      }

BUGS
       The glibc 2.2.5 implementation of ether_line() is broken.

CONFORMING TO
       4.3BSD, SunOS

SEE ALSO
       ethers(5)

BSD				  2002-07-20			 ETHER_ATON(3)
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