Does anyone know how to close the NetLib if it is opened by another
application? In other words, how do I detect whether a network connection is
currently made?
The way I see it, calls to NetLibOpenCount and NetLibClose only work after a
call to NetLibOpen. However, a call to NetLibOpen will try to connect if
there isn't already a connection. So if I don't want to open a connection,
just close it, I can't find out whether it is open, nor close it, without
risking opening it.
In OS 4.0 there is a sysNotifyNetLibIFMediaEvent, but how is this done in
pre-OS4.0?
Here is code that will do what the comments say if there is a connection
established by another app, but NetLibOpen has not been called by this app
since it started. (It works fine after a call to NetLibOpen.)
// OK. Returns 0 and ref is set to 4.
err = SysLibFind(comLibName, &netlibRefnum);
if (!err) {
// Returns 0, but count is set to 0.
err = NetLibOpenCount(netlibRefnum, &count);
for (i = 0; i < count; i++) {
err = NetLibClose(netlibRefnum, true);
}
}
Matt
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