Date: Thu, 28 Jul 2005 03:48:34 +0400 From: Sergey Uvarov <uvarovsl@mail.pnpi.spb.ru> To: freebsd-hackers@freebsd.org Subject: file locking Message-ID: <42E81D52.1020909@mail.pnpi.spb.ru>
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Hello hackers, man page for flock(2) and fcntl(2) reads that a system call returns EOPNOTSUPP if file descriptor refers to an object that does not support file locking. However, it seems that it is not always true. For example, if underlying object is a device or a fifo returned error code depends on type of lock. When I look at sources of VOP_ADVLOCK for fifo (sys/fs/fifofs/fifo_vnops.c, fifo_advlock() function) I see the following line: ... return (ap->a_flags & F_FLOCK ? EOPNOTSUPP : EINVAL); ... I.e. for freebsd locks EOPNOTSUPP error code is returned. It is correct. But for posix locks EINVAL error code is returned. Is it correct? Thanks you in advance, Sergey.
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