hesiod_end man page on BSDOS

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HESIOD(3)						HESIOD(3)

NAME
       hesiod,	 hesiod_init,  hesiod_resolve,	hesiod_free_list,
       hesiod_to_bind, hesiod_end - Hesiod name server	interface
       library

SYNOPSIS
       #include <hesiod.h>

       int hesiod_init(void **context)
       char **hesiod_resolve(void *context, const char *name,
	    const char *type)
       void hesiod_free_list(void *context, char **list);
       char *hesiod_to_bind(void *context, const char *name,
	    const char *type)
       void hesiod_end(void *context)

DESCRIPTION
       This  family of functions allows you to perform lookups of
       Hesiod information, which is stored as text records in the
       Domain  Name  Service.  To perform lookups, you must first
       initialize a context, an opaque object which stores infor-
       mation used internally by the library between calls.  hes-
       iod_init initializes a context, storing a pointer  to  the
       context	in  the	 location pointed to by the context argu-
       ment.  hesiod_end frees the resources used by a context.

       hesiod_resolve is the primary interface	to  the	 library.
       If  successful,	it  returns a list of one or more strings
       giving the records matching name and type.  The last  ele-
       ment of the list is followed by a NULL pointer.	It is the
       caller's responsibility to call hesiod_free_list	 to  free
       the resources used by the returned list.

       hesiod_to_bind  converts	 name  and type into the DNS name
       used by hesiod_resolve.	It is the caller's responsibility
       to free the returned string using free.

RETURN VALUES
       If successful, hesiod_init returns 0; otherwise it returns
       -1 and sets errno to indicate the error.	 On failure, hes-
       iod_resolve  and	 hesiod_to_bind	 return	 NULL and set the
       global variable errno to indicate the error.

ENVIRONMENT
       If the environment variable HES_DOMAIN  is  set,	 it  will
       override	 the domain in the Hesiod configuration file.  If
       the environment variable HESIOD_CONFIG is set,  it  speci-
       fies the location of the Hesiod configuration file.

SEE ALSO
       `Hesiod	- Project Athena Technical Plan -- Name Service',
       named(8), hesiod.conf(5)

			 30 November 1996			1

HESIOD(3)						HESIOD(3)

ERRORS
       Hesiod calls may fail because of:

       ENOMEM Insufficient memory was available to carry out  the
	      requested operation.

       ENOEXEC
	      hesiod_init failed because the Hesiod configuration
	      file was invalid.

       ECONNREFUSED
	      hesiod_resolve failed because no name server  could
	      be contacted to answer the query.

       EMSGSIZE
	      hesiod_resolve failed because the query or response
	      was too big to fit into the packet buffers.

       ENOENT hesiod_resolve failed because the name  server  had
	      no  text	records	 matching  name and type, or hes-
	      iod_to_bind failed because the name argument had	a
	      domain  extension	 which could not be resolved with
	      type ``rhs-extension'' in the local Hesiod  domain.

AUTHOR
       Steve Dyer, IBM/Project Athena
       Greg Hudson, MIT Team Athena
       Copyright  1987,	 1988,	1995,  1996  by the Massachusetts
       Institute of Technology.

BUGS
       The strings corresponding to the errno values set  by  the
       Hesiod  functions  are not particularly indicative of what
       went wrong, especially for ENOEXEC and ENOENT.

			 30 November 1996			2

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