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setnetent(3)
NAME
  setnetent, setnetent_r, endnetent, endnetent_r - Opens, rewinds, or closes
  the networks file

LIBRARY
  Standard C Library (libc.so, libc.a)

SYNOPSIS
  #include <netdb.h>
  void setnetent(
	  int stay_open);
  void endnetent(void);

  [Tru64 UNIX]	The following functions are supported in order to maintain
  backward compatibility with previous versions of the operating system.

  int setnetent_r(
	  int stay_open,
	  struct netent_data *net_data);
  void endnetent_r(
	  struct netent_data *net_data);

  The following definition of the setnetent() function does not conform to
  current standards and is supported only for backward compatibility (see
  standards(5)):

  int setnetent(
	  int stay_open);

STANDARDS
  Interfaces documented on this reference page conform to industry standards
  as follows:

  setnetent():	XNS4.0

  endnetent():	XNS4.0

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

PARAMETERS
  stay_open Specifies a value that indicates when to close the networks file.
	    Specifying a value of 0 (zero) closes the networks file after
	    each call to the getnetent() function.  Specifying a nonzero
	    value leaves the networks database file open after each call.

  net_data  [Tru64 UNIX]  For setnetent_r() and endnetent_r() only, this
	    points at a structure where setnetent_r() and endnetent_r() store
	    information about the networks file.

DESCRIPTION
  The setnetent() (set network entry) function opens the either the local
  /etc/networks file or the NIS distributed networks file and sets the file
  marker at the beginning of the file.	To determine which file or files to
  search, and in which order, the system uses the switches in the
  /etc/svc.conf file.

  The endnetent() function closes the networks file, previously opened with
  the getnetent(), getnetbyaddr(), setnetent(), or getnetbyname() function.

  If the setnetent() function is called with a non-zero stay_open parameter,
  the connection remains until the endnetent() or exit() functions are
  called.

NOTES
  [Tru64 UNIX]	The setnetent_r() function is the reentrant version of the
  setnetent() function.	 It is supported in order to maintain backward
  compatibility with previous versions of the operating system.	 Upon
  successful completion, the setnetent_r() function returns a value of 0
  (zero).  Otherwise, it returns a value of -1.

  [Tru64 UNIX]	Note that when you first call the setnetent_r() function, you
  must set to NULL the net_fp field of the netent_data structure. The netdb.h
  header file defines the netent_data structure.

  [Tru64 UNIX]	The endnetent_r() function is the reentrant version of the
  endnetent() function.	 It is supported in order to maintain backward
  compatibility with previous versions of the operating system.	 The netdb.h
  header file defines the netent_data structure.

RETURN VALUES
  Upon successful completion, the backward compatible version of the
  setnetent() function returns a value of 1.  Otherwise, it returns a value
  of 0 (zero).

  The setnetent, endnetent(), and endnetent_r() functions do not return a
  value.

ERRORS
  Current industry standards do not define error values for the setnetent()
  and endnetent functions.

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

  [EINVAL]  If net_data is invalid.

  In addition, the setnetent(), backward compatible version of setnetent(),
  and setnetent_r() functions can fail to open the file.  In this case, errno
  will be set to the appropriate value.

FILES
  /etc/networks
	    This file is the DARPA Internet network name database file. Each
	    record in the file occupies a single line and has three fields:
	    the official network name, the network number, and alias.

  /etc/svc.conf
	    The database service selection configuration file.

RELATED INFORMATION
  Functions: getnetbyaddr(3), getnetbyname(3), getnetent(3).

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

  Networks: nis_intro(7).

  Standards: standards(5).

Index for Section 3

Alphabetical listing for S

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