NAME

LIBRARY

SYNOPSIS

struct netconfig *
getnetpath(void *handlep);

void *
setnetpath(void);

int
endnetpath(void *handlep);

DESCRIPTION

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 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.

SEE ALSO