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endnetpath (3)

>> endnetpath (3) ( FreeBSD man: Библиотечные вызовы )

BSD mandoc

NAME



getnetpath

 
setnetpath

 
endnetpath

 - get

/etc/netconfig

entry corresponding to
NETPATH

component

LIBRARY

Lb libc

SYNOPSIS

#include <netconfig.h>
struct netconfig * getnetpath (void *handlep);
void * setnetpath (void);
int endnetpath (void *handlep);

DESCRIPTION

The routines described in this page provide the application access to the system network configuration database, /etc/netconfig as it is ``filtered'' by the NETPATH environment variable (see environ(7)). See getnetconfig(3) for other routines that also access the network configuration database directly. The NETPATH variable is a list of colon-separated network identifiers.

The getnetpath ();
function returns a pointer to the netconfig database entry corresponding to the first valid NETPATH component. The netconfig entry is formatted as a struct netconfig . On each subsequent call, getnetpath ();
returns a pointer to the netconfig entry that corresponds to the next valid NETPATH component. The getnetpath ();
function can thus be used to search the netconfig database for all networks included in the NETPATH variable. When NETPATH has been exhausted, getnetpath ();
returns NULL

A call to setnetpath ();
``binds'' to or ``rewinds'' NETPATH The setnetpath ();
function must be called before the first call to getnetpath ();
and may be called at any other time. It returns a handle that is used by getnetpath (.);

The getnetpath ();
function silently ignores invalid NETPATH components. A NETPATH component is invalid if there is no corresponding entry in the netconfig database.

If the NETPATH variable is unset, getnetpath ();
behaves as if NETPATH were set to the sequence of ``default'' or ``visible'' networks in the netconfig database, in the order in which they are listed.

The endnetpath ();
function may be called to ``unbind'' from NETPATH when processing is complete, releasing resources for reuse. Programmers should be aware, however, that endnetpath ();
frees all memory allocated by getnetpath ();
for the struct netconfig data structure.

RETURN VALUES

The setnetpath ();
function returns a handle that is used by getnetpath (.);
In case of an error, setnetpath ();
returns NULL

The endnetpath ();
function returns 0 on success and -1 on failure (for example, if setnetpath ();
was not called previously). The nc_perror ();
or nc_sperror ();
function can be used to print out the reason for failure. See getnetconfig(3).

When first called, getnetpath ();
returns a pointer to the netconfig database entry corresponding to the first valid NETPATH component. When NETPATH has been exhausted, getnetpath ();
returns NULL

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Created 1996-2024 by Maxim Chirkov
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