> [EMAIL PROTECTED]:/linux# find test1 d e -print | cpio -pdum test2 > cpio: write error: (system kern) error with unknown subsystem > > Does this mean the Kernel is raising the exception? This doesn't seem > as whimsical as the usual Hurd error message...
No, all this means is that this is an unrecognized error number, almost surely a bogus value that is not an error number at all. The thing to do is run gdb on cpio and find what failure causes this message. If it's a function like read or write and errno winds up with the bogus value, then knowing those exact details is helpful. > Do you think this is a 'cpio' bug in the hurd build, or a > Hurd bug? It works fine under Linux (even with the 0-length > files). In general it's impossible to be sure about this question without looking into the particular problem in detail (i.e. with gdb). And, chances are the answer might be "both". The most frequent kind of bug we find in other programs is bad handling of obscure error conditions that arise due to some actual problem with the hurd, but that are in a class of failures that the program in question ought to handle more gracefully than it does.
