[Bug 969032] Re: Python os module lacks the chflags/lchflags methods
I posted a proof-of-concept for how to set extended attributes with Python at http://stackoverflow.com/questions/34176464/why-os-chflags- doesnt-work-under-linux/36274086#36274086. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/969032 Title: Python os module lacks the chflags/lchflags methods To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python2.7/+bug/969032/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 969032] Re: Python os module lacks the chflags/lchflags methods
I ran into this today and thought I'd share what I learned. The syscall chflags does not exist in Linux, so when compiling Python it notices this and does not provide os.chflags(). chattr(1) on the other hand uses an ioctl() of EXT2_IOC_SETFLAGS to set the attributes (e2fsprogs-1.42.13's lib/e2p/fsetflags.c): | fd = open (name, OPEN_FLAGS); | if (fd == -1) | return -1; | f = (int) flags; | r = ioctl (fd, EXT2_IOC_SETFLAGS, ); | if (r == -1) | save_errno = errno; | close (fd); So you could (instead of executing chattr(1)) call Python's fcntl.ioctl() to perform that action. It would probably be very nice if Python's os.chflags() would DWIM (and if someone brings this to Python please report here), but on the other hand I can also understand the paradigm to keep low-level functions "dumb", i. e. a function where the user expects that a simple syscall is made should only do that and nothing more. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/969032 Title: Python os module lacks the chflags/lchflags methods To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python2.7/+bug/969032/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 969032] Re: Python os module lacks the chflags/lchflags methods
Yes, I know `chattr` and I already use it on Linux. But referring to http://docs.python.org/library/os.html#os.chflags the flags feature IS the chattr on Linux (Availability: Unix, not just MacOS and FreeBSD). Reading further http://bugs.python.org/issue1490190 , the flags/chattr seems understood as different by upstream, but it is really the same system call. Though it has not the same name, it does the same thing (both flags and chattr have SF_IMMUTABLE, SF_APPEND, and more in common). Doing `os.chflags()` in python on Linux should make the `chattr` equivalent syscall on Linux, if I understand the Python documentation correctly. Only some flags values would be different (some missing and some more than on other OSes). It seems to be a good candidate for an upstream bug, though. I will investigate a little more in this direction. ** Bug watch added: Python Roundup #1490190 http://bugs.python.org/issue1490190 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/969032 Title: Python os module lacks the chflags/lchflags methods To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python2.7/+bug/969032/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 969032] Re: Python os module lacks the chflags/lchflags methods
currently the configure check fails -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/969032 Title: Python os module lacks the chflags/lchflags methods To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python2.7/+bug/969032/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 969032] Re: Python os module lacks the chflags/lchflags methods
this is only available on MacOS and FreeBSD. Please use chattr on Linux instead. ** Changed in: python2.7 (Ubuntu) Status: New = Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/969032 Title: Python os module lacks the chflags/lchflags methods To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python2.7/+bug/969032/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
