https://bugzilla.kernel.org/show_bug.cgi?id=218830 Theodore Tso (tytso@xxxxxxx) changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED CC| |tytso@xxxxxxx Resolution|--- |INVALID --- Comment #1 from Theodore Tso (tytso@xxxxxxx) --- This is a test/programming bug. If you change reproduce.c so that it prints fd_a and fd_b, you'll see that they have the same value. So the reason why lseek didn't fail is because fd_a has the same integer value as fd_b --- and so lseek didn't fail and affected the current position of fd_b. This is a documented feature of the Linux/Unix/Posix interface. File descriptors are small integers, and if you close a file descriptor, it releases that integer ---- think of it as an index in an array, i.e., struct file *fd_array[MAX_FDS]. When you call open, it will find the first NULL pointer in fd_array, and installs a pointer to the struct file, and returns that integer as the file descriptor. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
