# Buggy code
def check_perms(name, ret, user, group, mode, attrs=None, follow_symlinks=False):
    """
    Check the permissions on files, modify attributes and chown if needed. File
    attributes are only verified if lsattr(1) is installed.

    CLI Example:

    .. code-block:: bash

        salt '*' file.check_perms /etc/sudoers '{}' root root 400 ai

    .. versionchanged:: 2014.1.3
        ``follow_symlinks`` option added
    """
    name = os.path.expanduser(name)

    if not ret:
        ret = {"name": name, "changes": {}, "comment": [], "result": True}
        orig_comment = ""
    else:
        orig_comment = ret["comment"]
        ret["comment"] = []

    # Check permissions
    perms = {}
    cur = stats(name, follow_symlinks=follow_symlinks)
    perms["luser"] = cur["user"]
    perms["lgroup"] = cur["group"]
    perms["lmode"] = salt.utils.files.normalize_mode(cur["mode"])

    is_dir = os.path.isdir(name)
    is_link = os.path.islink(name)
    if not salt.utils.platform.is_windows() and not is_dir and not is_link:
        try:
            lattrs = lsattr(name)
        except SaltInvocationError:
            lsattrs = None
        if lattrs is not None:
            # List attributes on file
            perms["lattrs"] = "".join(lattrs.get(name, ""))
            # Remove attributes on file so changes can be enforced.
            if perms["lattrs"]:
                chattr(name, operator="remove", attributes=perms["lattrs"])

    # user/group changes if needed, then check if it worked
    if user:
        if isinstance(user, int):
            user = uid_to_user(user)
        if (
            salt.utils.platform.is_windows()
            and user_to_uid(user) != user_to_uid(perms["luser"])
        ) or (not salt.utils.platform.is_windows() and user != perms["luser"]):
            perms["cuser"] = user

    if group:
        if isinstance(group, int):
            group = gid_to_group(group)
        if (
            salt.utils.platform.is_windows()
            and group_to_gid(group) != group_to_gid(perms["lgroup"])
        ) or (not salt.utils.platform.is_windows() and group != perms["lgroup"]):
            perms["cgroup"] = group

    if "cuser" in perms or "cgroup" in perms:
        if not __opts__["test"]:
            if os.path.islink(name) and not follow_symlinks:
                chown_func = lchown
            else:
                chown_func = chown
            if user is None:
                user = perms["luser"]
            if group is None:
                group = perms["lgroup"]
            try:
                chown_func(name, user, group)
            except OSError:
                ret["result"] = False

    if user:
        if isinstance(user, int):
            user = uid_to_user(user)
        if (
            salt.utils.platform.is_windows()
            and user_to_uid(user)
            != user_to_uid(get_user(name, follow_symlinks=follow_symlinks))
            and user != ""
        ) or (
            not salt.utils.platform.is_windows()
            and user != get_user(name, follow_symlinks=follow_symlinks)
            and user != ""
        ):
            if __opts__["test"] is True:
                ret["changes"]["user"] = user
            else:
                ret["result"] = False
                ret["comment"].append("Failed to change user to {0}".format(user))
        elif "cuser" in perms and user != "":
            ret["changes"]["user"] = user

    if group:
        if isinstance(group, int):
            group = gid_to_group(group)
        if (
            salt.utils.platform.is_windows()
            and group_to_gid(group)
            != group_to_gid(get_group(name, follow_symlinks=follow_symlinks))
            and user != ""
        ) or (
            not salt.utils.platform.is_windows()
            and group != get_group(name, follow_symlinks=follow_symlinks)
            and user != ""
        ):
            if __opts__["test"] is True:
                ret["changes"]["group"] = group
            else:
                ret["result"] = False
                ret["comment"].append("Failed to change group to {0}".format(group))
        elif "cgroup" in perms and user != "":
            ret["changes"]["group"] = group

    if not salt.utils.platform.is_windows() and not is_dir:
        # Replace attributes on file if it had been removed
        if perms.get("lattrs", ""):
            chattr(name, operator="add", attributes=perms["lattrs"])

    # Mode changes if needed
    if mode is not None:
        # File is a symlink, ignore the mode setting
        # if follow_symlinks is False
        if os.path.islink(name) and not follow_symlinks:
            pass
        else:
            mode = salt.utils.files.normalize_mode(mode)
            if mode != perms["lmode"]:
                if __opts__["test"] is True:
                    ret["changes"]["mode"] = mode
                else:
                    set_mode(name, mode)
                    if mode != salt.utils.files.normalize_mode(get_mode(name)):
                        ret["result"] = False
                        ret["comment"].append(
                            "Failed to change mode to {0}".format(mode)
                        )
                    else:
                        ret["changes"]["mode"] = mode

    # Modify attributes of file if needed
    if attrs is not None and not is_dir:
        # File is a symlink, ignore the mode setting
        # if follow_symlinks is False
        if os.path.islink(name) and not follow_symlinks:
            pass
        else:
            diff_attrs = _cmp_attrs(name, attrs)
            if diff_attrs is not None:
                if diff_attrs[0] is not None or diff_attrs[1] is not None:
                    if __opts__["test"] is True:
                        ret["changes"]["attrs"] = attrs
                    else:
                        if diff_attrs[0] is not None:
                            chattr(name, operator="add", attributes=diff_attrs[0])
                        if diff_attrs[1] is not None:
                            chattr(name, operator="remove", attributes=diff_attrs[1])
                        cmp_attrs = _cmp_attrs(name, attrs)
                        if cmp_attrs[0] is not None or cmp_attrs[1] is not None:
                            ret["result"] = False
                            ret["comment"].append(
                                "Failed to change attributes to {0}".format(attrs)
                            )
                        else:
                            ret["changes"]["attrs"] = attrs

    # Only combine the comment list into a string
    # after all comments are added above
    if isinstance(orig_comment, six.string_types):
        if orig_comment:
            ret["comment"].insert(0, orig_comment)
        ret["comment"] = "; ".join(ret["comment"])

    # Set result to None at the very end of the function,
    # after all changes have been recorded above
    if __opts__["test"] is True and ret["changes"]:
        ret["result"] = None

    return ret, perms


# Traceback (SaltInvocationError)
# salt-call state.sls dir
/usr/local/lib/python2.7/dist-packages/requests/__init__.py:83: RequestsDependencyWarning: Old version of cryptography ([1, 2, 3]) may cause slowdown.
warnings.warn(warning, RequestsDependencyWarning)
[ERROR   ] An exception occurred in this state: Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/salt/state.py", line 1905, in call
**cdata['kwargs'])
File "/usr/local/lib/python2.7/dist-packages/salt/loader.py", line 1830, in wrapper
return f(*args, **kwargs)
File "/var/cache/salt/minion/extmods/states/file.py", line 3421, in directory
full, ret, user, group, file_mode, None, follow_symlinks)
File "/usr/local/lib/python2.7/dist-packages/salt/modules/file.py", line 4460, in check_perms
lattrs = lsattr(name)
File "/usr/local/lib/python2.7/dist-packages/salt/modules/file.py", line 564, in lsattr
raise SaltInvocationError("File or directory does not exist.")
SaltInvocationError: File or directory does not exist.

local:
----------
ID: /tmp/dirtest
Function: file.directory
Result: False
Comment: An exception occurred in this state: Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/salt/state.py", line 1905, in call
**cdata['kwargs'])
File "/usr/local/lib/python2.7/dist-packages/salt/loader.py", line 1830, in wrapper
return f(*args, **kwargs)
File "/var/cache/salt/minion/extmods/states/file.py", line 3421, in directory
full, ret, user, group, file_mode, None, follow_symlinks)
File "/usr/local/lib/python2.7/dist-packages/salt/modules/file.py", line 4460, in check_perms
lattrs = lsattr(name)
File "/usr/local/lib/python2.7/dist-packages/salt/modules/file.py", line 564, in lsattr
raise SaltInvocationError("File or directory does not exist.")
SaltInvocationError: File or directory does not exist.
Started: 10:34:39.631296
Duration: 27.711 ms
Changes:

Summary for local
------------
Succeeded: 0
Failed:    1
------------
Total states run:     1
Total run time:  27.711 ms

# Fixed code
def check_perms(name, ret, user, group, mode, attrs=None, follow_symlinks=False):
    """
    Check the permissions on files, modify attributes and chown if needed. File
    attributes are only verified if lsattr(1) is installed.

    CLI Example:

    .. code-block:: bash

        salt '*' file.check_perms /etc/sudoers '{}' root root 400 ai

    .. versionchanged:: 2014.1.3
        ``follow_symlinks`` option added
    """
    name = os.path.expanduser(name)

    if not ret:
        ret = {"name": name, "changes": {}, "comment": [], "result": True}
        orig_comment = ""
    else:
        orig_comment = ret["comment"]
        ret["comment"] = []

    # Check permissions
    perms = {}
    cur = stats(name, follow_symlinks=follow_symlinks)
    perms["luser"] = cur["user"]
    perms["lgroup"] = cur["group"]
    perms["lmode"] = salt.utils.files.normalize_mode(cur["mode"])

    is_dir = os.path.isdir(name)
    is_link = os.path.islink(name)
    if not salt.utils.platform.is_windows() and not is_dir and not is_link:
        try:
            lattrs = lsattr(name)
        except SaltInvocationError:
            lattrs = None
        if lattrs is not None:
            # List attributes on file
            perms["lattrs"] = "".join(lattrs.get(name, ""))
            # Remove attributes on file so changes can be enforced.
            if perms["lattrs"]:
                chattr(name, operator="remove", attributes=perms["lattrs"])

    # user/group changes if needed, then check if it worked
    if user:
        if isinstance(user, int):
            user = uid_to_user(user)
        if (
            salt.utils.platform.is_windows()
            and user_to_uid(user) != user_to_uid(perms["luser"])
        ) or (not salt.utils.platform.is_windows() and user != perms["luser"]):
            perms["cuser"] = user

    if group:
        if isinstance(group, int):
            group = gid_to_group(group)
        if (
            salt.utils.platform.is_windows()
            and group_to_gid(group) != group_to_gid(perms["lgroup"])
        ) or (not salt.utils.platform.is_windows() and group != perms["lgroup"]):
            perms["cgroup"] = group

    if "cuser" in perms or "cgroup" in perms:
        if not __opts__["test"]:
            if os.path.islink(name) and not follow_symlinks:
                chown_func = lchown
            else:
                chown_func = chown
            if user is None:
                user = perms["luser"]
            if group is None:
                group = perms["lgroup"]
            try:
                chown_func(name, user, group)
            except OSError:
                ret["result"] = False

    if user:
        if isinstance(user, int):
            user = uid_to_user(user)
        if (
            salt.utils.platform.is_windows()
            and user_to_uid(user)
            != user_to_uid(get_user(name, follow_symlinks=follow_symlinks))
            and user != ""
        ) or (
            not salt.utils.platform.is_windows()
            and user != get_user(name, follow_symlinks=follow_symlinks)
            and user != ""
        ):
            if __opts__["test"] is True:
                ret["changes"]["user"] = user
            else:
                ret["result"] = False
                ret["comment"].append("Failed to change user to {0}".format(user))
        elif "cuser" in perms and user != "":
            ret["changes"]["user"] = user

    if group:
        if isinstance(group, int):
            group = gid_to_group(group)
        if (
            salt.utils.platform.is_windows()
            and group_to_gid(group)
            != group_to_gid(get_group(name, follow_symlinks=follow_symlinks))
            and user != ""
        ) or (
            not salt.utils.platform.is_windows()
            and group != get_group(name, follow_symlinks=follow_symlinks)
            and user != ""
        ):
            if __opts__["test"] is True:
                ret["changes"]["group"] = group
            else:
                ret["result"] = False
                ret["comment"].append("Failed to change group to {0}".format(group))
        elif "cgroup" in perms and user != "":
            ret["changes"]["group"] = group

    if not salt.utils.platform.is_windows() and not is_dir:
        # Replace attributes on file if it had been removed
        if perms.get("lattrs", ""):
            chattr(name, operator="add", attributes=perms["lattrs"])

    # Mode changes if needed
    if mode is not None:
        # File is a symlink, ignore the mode setting
        # if follow_symlinks is False
        if os.path.islink(name) and not follow_symlinks:
            pass
        else:
            mode = salt.utils.files.normalize_mode(mode)
            if mode != perms["lmode"]:
                if __opts__["test"] is True:
                    ret["changes"]["mode"] = mode
                else:
                    set_mode(name, mode)
                    if mode != salt.utils.files.normalize_mode(get_mode(name)):
                        ret["result"] = False
                        ret["comment"].append(
                            "Failed to change mode to {0}".format(mode)
                        )
                    else:
                        ret["changes"]["mode"] = mode

    # Modify attributes of file if needed
    if attrs is not None and not is_dir:
        # File is a symlink, ignore the mode setting
        # if follow_symlinks is False
        if os.path.islink(name) and not follow_symlinks:
            pass
        else:
            diff_attrs = _cmp_attrs(name, attrs)
            if diff_attrs is not None:
                if diff_attrs[0] is not None or diff_attrs[1] is not None:
                    if __opts__["test"] is True:
                        ret["changes"]["attrs"] = attrs
                    else:
                        if diff_attrs[0] is not None:
                            chattr(name, operator="add", attributes=diff_attrs[0])
                        if diff_attrs[1] is not None:
                            chattr(name, operator="remove", attributes=diff_attrs[1])
                        cmp_attrs = _cmp_attrs(name, attrs)
                        if cmp_attrs[0] is not None or cmp_attrs[1] is not None:
                            ret["result"] = False
                            ret["comment"].append(
                                "Failed to change attributes to {0}".format(attrs)
                            )
                        else:
                            ret["changes"]["attrs"] = attrs

    # Only combine the comment list into a string
    # after all comments are added above
    if isinstance(orig_comment, six.string_types):
        if orig_comment:
            ret["comment"].insert(0, orig_comment)
        ret["comment"] = "; ".join(ret["comment"])

    # Set result to None at the very end of the function,
    # after all changes have been recorded above
    if __opts__["test"] is True and ret["changes"]:
        ret["result"] = None

    return ret, perms