now w/o python module dependencies

Signed-off-by: Brian Coca <briancoca+dev@gmail.com>

library/files/acl

@@ -35,10 +35,10 @@ options:
       - The acl to set/remove. MUST always quote! In form of '<type>:<qualifier>:<perms>', qualifier may be empty for some types but type and perms are always requried. '-' can be used as placeholder when you don't care about permissions.
   state:
     required: false
-    default: get
-    choices: [ 'get', 'present', 'absent' ]
+    default: query
+    choices: [ 'query', 'present', 'absent' ]
     description:
-      - defines which operation you want to do. C(get) get the current acl C(present) sets/changes the acl, requires entry field C(absent) deletes the acl, requires entry field
+      - defines which operation you want to do. C(query) get the current acl C(present) sets/changes the acl, requires permissions field C(absent) deletes the acl, requires permissions field
   follow:
     required: false
     default: yes
@@ -47,7 +47,10 @@ options:
       - if yes, dereferences symlinks and sets/gets attributes on symlink target, otherwise acts on symlink itself.
 author: Brian Coca
 notes:
-    - The "acl" module requires the posix1e module on the target machine and  that acl is enabled on the target filesystem.
+    - The "acl" module requires that acl is enabled on the target filesystem and that the setfacl and getfacl binaries are installed.
+author: Brian Coca
+notes:
+    - The "acl" module requires the acl command line utilities be installed on the target machine and  that acl is enabled on the target filesystem.
 '''
 
 EXAMPLES = '''
@@ -55,37 +58,64 @@ EXAMPLES = '''
 - acl: name=/etc/foo.conf
 
 # Grants joe read access to foo
-- acl: name=/etc/foo.conf entry="u:joe:r" state=present
+- acl: name=/etc/foo.conf entry="user:joe:r" state=present
 
 # Removes the acl for joe
-- acl: name=/etc/foo.conf entry="u:joe:-" state=absent
+- acl: name=/etc/foo.conf entry="user:joe:-" state=absent
 '''
-NO_PYLIBACL=False
-try:
-    import posix1e
-except:
-    NO_PYLIBACL=True
 
-def gen_acl(module,entry):
+def get_acl(module,path,entry,follow):
+
+    cmd = [ module.get_bin_path('getfacl', True) ]
+    if not follow:
+        cmd.append('-h')
+    # prevents absolute path warnings and removes headers
+    cmd.append('-cp')
+    cmd.append(path)
+
+    return _run_acl(module,cmd)
+
+def set_acl(module,path,entry,follow):
+
+    cmd = [ module.get_bin_path('setfacl', True) ]
+    if not follow:
+        cmd.append('-h')
+    cmd.append('-m "%s"' % entry)
+    cmd.append(path)
+
+    return _run_acl(module,cmd)
+
+def rm_acl(module,path,entry,follow):
+
+    cmd = [ module.get_bin_path('setfacl', True) ]
+    if not follow:
+        cmd.append('-h')
+    entry = entry[0:entry.rfind(':')]
+    cmd.append('-x "%s"' % entry)
+    cmd.append(path)
+
+    return _run_acl(module,cmd,False)
+
+def _run_acl(module,cmd,check_rc=True):
+
     try:
-        return posix1e.ACL(text=entry)
-    except IOError, e:
-        module.fail_json(msg="Invalid entry: '%s', check that user/groups exist and permissions are correct" % entry)
+        (rc, out, err) = module.run_command(' '.join(cmd), check_rc=check_rc)
+    except Exception, e:
+        module.fail_json(msg=e.strerror)
+
+    return out.splitlines()
 
 def main():
     module = AnsibleModule(
         argument_spec = dict(
             name = dict(required=True,aliases=['path']),
             entry = dict(required=False, default=None),
-            state = dict(required=False, default='get', choices=[ 'get', 'present', 'absent' ], type='str'),
+            state = dict(required=False, default='query', choices=[ 'query', 'present', 'absent' ], type='str'),
             follow = dict(required=False, type='bool', default=True),
         ),
         supports_check_mode=True,
     )
 
-    if NO_PYLIBACL:
-        module.fail_json(msg="Could not import required module pylibacl (posix1e)")
-
     path = module.params.get('name')
     entry = module.params.get('entry')
     state = module.params.get('state')
@@ -94,73 +124,72 @@ def main():
     if not os.path.exists(path):
         module.fail_json(msg="path not found or not accessible!")
 
-    if entry is None and state in ['present','absent']:
-        module.fail_json(msg="%s needs entry to be set" % state)
-
-    if entry.count(":") != 2:
-        module.fail_json(msg="Invalid entry: '%s', it requires 3 sections divided by ':'" % entry)
+    if entry is None:
+        if state in ['present','absent']:
+            module.fail_json(msg="%s needs entry to be set" % state)
+    else:
+        if entry.count(":") != 2:
+            module.fail_json(msg="Invalid entry: '%s', it requires 3 sections divided by ':'" % entry)
 
     changed=False
     changes=0
     msg = ""
-    currentacl = posix1e.ACL(file=path)
-    newacl = currentacl
-    res = currentacl
+    currentacl = get_acl(module,path,entry,follow)
 
 
     if (state == 'present'):
-        for newe in gen_acl(module, entry):
-            matched = False
-            for olde in currentacl:
-                diff = False
-                if olde.tag_type == newe.tag_type:
-                    if newe.tag_type in [ posix1e.ACL_GROUP, posix1e.ACL_USER ]:
-                        if olde.qualifier == newe.qualifier:
-                            matched = True
-                            if not str(olde.permset) == str(newe.permset):
-                                diff = True
-                    else:
+        newe = entry.split(':')
+        matched = False
+        for oldentry in currentacl:
+            diff = False
+            olde = oldentry.split(':')
+            if olde[0] == newe[0]:
+                if newe[0] in ['user', 'group']:
+                    if olde[1] == newe[1]:
                         matched = True
-                        if not str(olde.permset) == str(newe.permset):
+                        if not olde[2] == newe[2]:
                             diff = True
-                if diff:
-                    newacl.delete_entry(olde)
-                    newacl.append(newe)
-                    changes=changes+1
-                if matched:
-                    break
-            if not matched:
-                newacl.append(newe)
+                else:
+                    matched = True
+                    if not olde[2] == newe[2]:
+                        diff = True
+            if diff:
                 changes=changes+1
+                if not module.check_mode:
+                    set_acl(module,path,entry,follow)
+            if matched:
+                break
+        if not matched:
+            changes=changes+1
+            if not module.check_mode:
+                set_acl(module,path,entry,follow)
         msg="%s is present" % (entry)
     elif state == 'absent':
-        for rme in gen_acl(module, entry):
-            for olde in currentacl:
-                if olde.tag_type == rme.tag_type:
-                    if rme.tag_type in [ posix1e.ACL_GROUP, posix1e.ACL_USER ]:
-                        if olde.qualifier == rme.qualifier:
-                            newacl.delete_entry(olde)
-                            changes=changes+1
-                            break
-                    else:
-                        newacl.delete_entry(olde)
+        rme = entry.split(':')
+        for oldentry in currentacl:
+            olde = oldentry.split(':')
+            if olde[0] == rme[0]:
+                if rme[0] in ['user', 'group']:
+                    if olde[1] == rme[1]:
                         changes=changes+1
+                        if not module.check_mode:
+                            rm_acl(module,path,entry,follow)
                         break
+                else:
+                    changes=changes+1
+                    if not module.check_mode:
+                        rm_acl(module,path,entry,follow)
+                    break
         msg="%s is absent" % (entry)
     else:
         msg="current acl"
 
     if changes > 0:
-        newacl.calc_mask()
-        if not newacl.valid():
-            module.fail_json(msg="Invalid acl constructed: %s" % newacl.to_any_text())
-        if not module.check_mode:
-            newacl.applyto(path)
         changed=True
-        res=newacl
+        currentacl = get_acl(module,path,entry,follow)
 
     msg="%s. %d entries changed" % (msg,changes)
-    module.exit_json(changed=changed, msg=msg, acl=res.to_any_text().split())
+    module.exit_json(changed=changed, msg=msg, acl=currentacl)
 
 # this is magic, see lib/ansible/module_common.py
 #<<INCLUDE_ANSIBLE_MODULE_COMMON>>