4 files changed, 89 insertions, 1 deletions
diff --git a/python/vyos/defaults.py b/python/vyos/defaults.py
new file mode 100644
index 000000000..43f222cc7
--- /dev/null
+++ b/python/vyos/defaults.py
@@ -0,0 +1,3 @@
+directories = {
+  "data": "/usr/share/vyos/"
+}
diff --git a/python/vyos/interfaces.py b/python/vyos/interfaces.py
new file mode 100644
index 000000000..0759aaa2b
--- /dev/null
+++ b/python/vyos/interfaces.py
@@ -0,0 +1,30 @@
+import re
+import json
+
+import netifaces
+
+
+intf_type_data_file = '/usr/share/vyos/interface-types.json'
+
+def list_interfaces():
+    interfaces = netifaces.interfaces()
+
+    # Remove "fake" interfaces associated with drivers
+    for i in ["dummy0", "ip6tnl0", "tunl0", "ip_vti0", "ip6_vti0"]:
+        try:
+            interfaces.remove(i)
+        except ValueError:
+            pass
+
+    return interfaces
+
+def list_interfaces_of_type(typ):
+    with open(intf_type_data_file, 'r') as f:
+        types_data = json.load(f)
+
+    all_intfs = list_interfaces()
+    if not (typ in types_data.keys()):
+        raise ValueError("Unknown interface type: {0}".format(typ))
+    else:
+        r = re.compile('^{0}\d+'.format(types_data[typ]))
+        return list(filter(lambda i: re.match(r, i), all_intfs))
diff --git a/python/vyos/util.py b/python/vyos/util.py
new file mode 100644
index 000000000..9a36ef84f
--- /dev/null
+++ b/python/vyos/util.py
@@ -0,0 +1,50 @@
+import re
+
+
+def colon_separated_to_dict(data_string, uniquekeys=False):
+    """ Converts a string containing newline-separated entries
+        of colon-separated key-value pairs into a dict.
+
+        Such files are common in Linux /proc filesystem
+
+    Args:
+        data_string (str): data string
+        uniquekeys (bool): whether to insist that keys are unique or not
+
+    Returns: dict
+
+    Raises:
+        ValueError: if uniquekeys=True and the data string has
+            duplicate keys.
+
+    Note:
+        If uniquekeys=True, then dict entries are always strings,
+        otherwise they are always lists of strings.
+    """
+    key_value_re = re.compile('([^:]+)\s*\:\s*(.*)')
+
+    data_raw = re.split('\n', data_string)
+
+    data = {}
+
+    for l in data_raw:
+        l = l.strip()
+        if l:
+            match = re.match(key_value_re, l)
+            if match:
+                key = match.groups()[0].strip()
+                value = match.groups()[1].strip()
+            if key in data.keys():
+                if uniquekeys:
+                    raise ValueError("Data string has duplicate keys: {0}".format(key))
+                else:
+                    data[key].append(value)
+            else:
+                if uniquekeys:
+                    data[key] = value
+                else:
+                    data[key] = [value]
+        else:
+            pass
+
+    return data
diff --git a/python/vyos/version.py b/python/vyos/version.py
index 5d32d878d..545d4e76b 100644
--- a/python/vyos/version.py
+++ b/python/vyos/version.py
@@ -17,9 +17,14 @@
 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
 #  IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+import os
 import json
 
-def get_version_data(file='/opt/vyatta/etc/version.json'):
+import vyos.defaults
+
+version_file = os.path.join(vyos.defaults.directories['data'], 'version.json')
+  
+def get_version_data(file=version_file):
     with open(file, 'r') as f:
         version_data = json.load(f)
     return version_data