struct
netconfig
*
getnetpath(
void *handlep
)
void
*
setnetpath(
void
)
int
endnetpath(
void *handlep
)
/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.
getnetpath()
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.
getnetpath(
)
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.
setnetpath(
)
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(
).
getnetpath()
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.
endnetpath()
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.
)
returns a handle that is used by
getnetpath(
).
In case of an error,
setnetpath(
)
returns NULL.
endnetpath()
returns 0 on success and -1 on failure
(for example, if
setnetpath(
)
was not called previously).
nc_perror(
)
or
nc_sperror(
)
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.