Hello,
It seems the Hurd implementation of pread() is not POSIX-compliant.
POSIX stipulates that "An attempt to perform a pread() on a file that is
incapable of seeking shall result in an error"[0]. But the Hurd pread()
ignores the offset parameter.
The reason is quite simple: pread() passes the
Manuel Menal, le Sat 09 Oct 2010 20:40:26 +0200, a écrit :
> There should be a way to check if the object is seekable or not before
> calling io_read(), so pread() can return an error. But there is no
> io_seekable() RPC, and calling io_seek() seems wrong to me, since
> pread() is supposed not to c
I think it would be reasonable to change the specification for io_read to
say that the offset parameter must be exactly (off_t)-1 for a nonseekable
io object, and that otherwise it must fail with ESPIPE. We might need to
audit the existing uses to make sure there aren't uses that would violate
thi
> Manuel Menal, le Sat 09 Oct 2010 20:40:26 +0200, a écrit :
> > There should be a way to check if the object is seekable or not before
> > calling io_read(), so pread() can return an error. But there is no
> > io_seekable() RPC, and calling io_seek() seems wrong to me, since
> > pread() is suppose
