getnetbyname man page on DigitalUNIX

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getnetbyname(3)						       getnetbyname(3)

       getnetbyname, getnetbyname_r - Get a network entry by name

       #include <netdb.h>

       struct netent *getnetbyname(
	       const char *name );

       [Tru64  UNIX]  The following obsolete function is supported in order to
       maintain backward compatibility with previous versions of the operating
       system.	You should not use it in new designs.  int getnetbyname_r(
	       const char *name,
	       struct netent *net,
	       struct netent_data *net_data );

       Standard C Library (libc)

       Interfaces  documented on this reference page conform to industry stan‐
       dards as follows:

       getnetbyname():	XNS4.0, XNS5.0

       Refer to the standards(5) reference page	 for  more  information	 about
       industry standards and associated tags.

       Specifies  the  official network name or alias.	[Tru64 UNIX]  For get‐
       netbyname_r() only, this points to the netent structure.	  The  netdb.h
       header  file defines the netent structure.  [Tru64 UNIX]	 For getnetby‐
       name_r() only, this is data for the  networks  database.	  The  netdb.h
       header file defines the netent_data structure.

       The  getnetbyname()  function  returns a pointer to a structure of type
       netent. Its members specify  data  in  fields  from  either  the	 local
       /etc/networks  file  or the NIS distributed network database. To deter‐
       mine which file or files to search, and in which order, the system uses
       the  switches  in  the  /etc/svc.conf  file.   The  netdb.h header file
       defines the netent structure.

       The getnetbyname() function searches  the  networks  file  sequentially
       until a match with the name parameter occurs. When EOF (End-of-File) is
       reached without a match, an null pointer is returned by this function.

       Use the endnetent() function to close the networks file.

       The getnetbyname() function returns a pointer to thread-specific	 data.
       Subsequent  calls  to  this  or a related function from the same thread
       overwrite this data.

       [Tru64 UNIX]  The getnetbyname_r() function is  an  obsolete  reentrant
       version	of  the	 getnetbyname() function.  It is supported in order to
       maintain backward compatibility	with previous versions of the  operat‐
       ing  system  and should not be used in new designs.  Note that you must
       set the net_fp field of the netent_data structure to  NULL  before  its
       first access by either the setnetent_r() or getnetbyname_r() function.

       You  must initialize the _net_stayopen option of the netent_data struc‐
       ture if you are not using the setnetent() function.

       Upon successful	completion,  the  getnetbyname()  function  returns  a
       pointer	to  a netent structure.	 If it fails or reaches the end of the
       /etc/networks name file, it returns a null pointer.

       [Tru64 UNIX]  Upon successful completion, the getnetbyname_r() function
       stores  the  netent  structure  in  the location pointed to by net, and
       returns a value of 0 (zero).  Upon failure, it returns a value of -1.

       Current industry standards do not define error values for the getnetby‐
       name() function.

       [Tru64  UNIX]  If any of the following conditions occurs, the getnetby‐
       name_r() function sets errno to the corresponding value:

       The net or net_data parameter is invalid.  The search failed.

       This file is the Internet network name database file.  Each  record  in
       the file occupies a single line and has three fields: the official net‐
       work name, the network number, and alias.

       Functions: endnetent(3), getnetent(3), getnetbyaddr(3), setnetent(3).

       Files: networks(4), svc.conf(4).

       Networks: nis_intro(7).

       Standards: standards(5).

       Network Programmer's Guide


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