DragonFly On-Line Manual Pages
GETNETPATH(3) DragonFly Library Functions Manual GETNETPATH(3)
getnetpath, setnetpath, endnetpath -- get /etc/netconfig entry corre-
sponding to NETPATH component
Standard C Library (libc, -lc)
struct netconfig *
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 configu-
ration database directly. The NETPATH variable is a list of colon-sepa-
rated 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
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
If the NETPATH variable is unset, getnetpath() behaves as if NETPATH were
set to the sequence of ``default'' or ``visible'' networks in the netcon-
fig 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.
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.
When first called, getnetpath() returns a pointer to the netconfig data-
base entry corresponding to the first valid NETPATH component. When
NETPATH has been exhausted, getnetpath() returns NULL.
getnetconfig(3), netconfig(5), environ(7)
DragonFly 4.7 November 15, 2008 DragonFly 4.7