utils: T7095: make wrapper use_shell aware and only utilize if vrf or…

… netns are requested

python/vyos/utils/process.py

@@ -14,6 +14,7 @@
 # License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
 import os
+import shlex
 
 from subprocess import Popen
 from subprocess import PIPE
@@ -22,11 +23,11 @@
 
 
 def get_wrapper(vrf, netns):
-    wrapper = ''
+    wrapper = None
     if vrf:
-        wrapper = f'ip vrf exec {vrf} '
+        wrapper = ['ip', 'vrf', 'exec', vrf]
     elif netns:
-        wrapper = f'ip netns exec {netns} '
+        wrapper = ['ip', 'netns', 'exec', netns]
     return wrapper
 
 
@@ -72,28 +73,33 @@ def popen(command, flag='', shell=None, input=None, timeout=None, env=None,
     if not debug.enabled(flag):
         flag = 'command'
 
+    use_shell = shell
+    stdin = None
+    if shell is None:
+        use_shell = False
+        if ' ' in command:
+            use_shell = True
+        if env:
+            use_shell = True
+
     # Must be run as root to execute command in VRF or network namespace
     if vrf or netns:
         if os.getuid() != 0:
             raise OSError(
                 'Permission denied: cannot execute commands in VRF and netns contexts as an unprivileged user'
             )
 
-    wrapper = get_wrapper(vrf, netns)
-    command = f'{wrapper} {command}'
+        wrapper = get_wrapper(vrf, netns)
+        if use_shell:
+            command = f'{shlex.join(wrapper)} {command}'
+        else:
+            if type(command) is not list:
+                command = [command]
+            command = wrapper + command
 
-    cmd_msg = f"cmd '{command}'"
+    cmd_msg = f"cmd '{command}'" if use_shell else f"cmd '{shlex.join(command)}'"
     debug.message(cmd_msg, flag)
 
-    use_shell = shell
-    stdin = None
-    if shell is None:
-        use_shell = False
-        if ' ' in command:
-            use_shell = True
-        if env:
-            use_shell = True
-
     if input:
         stdin = PIPE
         input = input.encode() if type(input) is str else input