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 standards 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 getnetbyname_r() only, this points to the
netent structure. The netdb.h header file defines the
netent structure. [Tru64 UNIX] For getnetbyname_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 determine 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 threadspecific
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 operating 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 structure 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 getnetbyname() function.
[Tru64 UNIX] If any of the following conditions occurs,
the getnetbyname_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 network 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
getnetbyname(3)
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