fixes #62772 fix kmod.* functions hard code relative command name

changelog/62772.fixed

@@ -0,0 +1 @@
+Fix kmod.* functions hard code relative command name

salt/modules/kmod.py

@@ -8,6 +8,7 @@
 
 import salt.utils.files
 import salt.utils.path
+from salt.exceptions import CommandExecutionError
 
 log = logging.getLogger(__name__)
 
@@ -108,6 +109,16 @@ def _remove_persistent_module(mod, comment):
     return {mod_name}
 
 
+def _which(cmd):
+    """
+    Utility function wrapper to error out early if a command is not found
+    """
+    _cmd = salt.utils.path.which(cmd)
+    if not _cmd:
+        raise CommandExecutionError("Command '{}' cannot be found".format(cmd))
+    return _cmd
+
+
 def available():
     """
     Return a list of all available kernel modules
@@ -169,7 +180,7 @@ def lsmod():
         salt '*' kmod.lsmod
     """
     ret = []
-    for line in __salt__["cmd.run"]("lsmod").splitlines():
+    for line in __salt__["cmd.run"](_which("lsmod")).splitlines():
         comps = line.split()
         if not len(comps) > 2:
             continue
@@ -237,7 +248,9 @@ def load(mod, persist=False):
         salt '*' kmod.load kvm
     """
     pre_mods = lsmod()
-    res = __salt__["cmd.run_all"]("modprobe {}".format(mod), python_shell=False)
+    res = __salt__["cmd.run_all"](
+        "{} {}".format(_which("modprobe"), mod), python_shell=False
+    )
     if res["retcode"] == 0:
         post_mods = lsmod()
         mods = _new_mods(pre_mods, post_mods)
@@ -283,7 +296,9 @@ def remove(mod, persist=False, comment=True):
         salt '*' kmod.remove kvm
     """
     pre_mods = lsmod()
-    res = __salt__["cmd.run_all"]("rmmod {}".format(mod), python_shell=False)
+    res = __salt__["cmd.run_all"](
+        "{} {}".format(_which("rmmod"), mod), python_shell=False
+    )
     if res["retcode"] == 0:
         post_mods = lsmod()
         mods = _rm_mods(pre_mods, post_mods)

tests/pytests/unit/modules/test_kmod.py

@@ -0,0 +1,137 @@
+import os
+
+import pytest
+
+import salt.modules.kmod as kmod
+from salt.exceptions import CommandExecutionError
+from tests.support.mock import MagicMock, patch
+from tests.support.unit import skipIf
+
+
+@pytest.fixture
+def configure_loader_modules():
+    return {kmod: {}}
+
+
+def test_available():
+    """
+    Tests return a list of all available kernel modules
+    """
+    with patch("salt.modules.kmod.available", MagicMock(return_value=["kvm"])):
+        assert ["kvm"] == kmod.available()
+
+
+def test_check_available():
+    """
+    Tests if the specified kernel module is available
+    """
+    with patch("salt.modules.kmod.available", MagicMock(return_value=["kvm"])):
+        assert kmod.check_available("kvm") is True
+
+
+def test_lsmod():
+    """
+    Tests return information about currently loaded modules
+    """
+    ret_str = """Module                  Size  Used by
+    kvm_intel             233472  0
+    """
+    expected = [{"size": "233472", "module": "kvm_intel", "depcount": "0", "deps": []}]
+    mock_cmd = MagicMock(return_value=ret_str)
+    with patch(
+        "salt.utils.path.which", MagicMock(side_effect=[None, "/sbin/lsmod"])
+    ), patch.dict(kmod.__salt__, {"cmd.run": mock_cmd}):
+        with pytest.raises(CommandExecutionError):
+            kmod.lsmod()
+        assert expected == kmod.lsmod()
+
+
+@skipIf(not os.path.isfile("/etc/modules"), "/etc/modules not present")
+def test_mod_list():
+    """
+    Tests return a list of the loaded module names
+    """
+    with patch(
+        "salt.modules.kmod._get_modules_conf",
+        MagicMock(return_value="/etc/modules"),
+    ):
+        with patch(
+            "salt.modules.kmod._strip_module_name", MagicMock(return_value="lp")
+        ):
+            assert ["lp"] == kmod.mod_list(True)
+
+    mock_ret = [{"size": 100, "module": None, "depcount": 10, "deps": None}]
+    with patch("salt.modules.kmod.lsmod", MagicMock(return_value=mock_ret)):
+        assert [None] == kmod.mod_list(False)
+
+
+def test_load():
+    """
+    Tests to loads specified kernel module.
+    """
+    mod = "cheese"
+    err_msg = "Module too moldy, refusing to load"
+    mock_persist = MagicMock(return_value={mod})
+    mock_lsmod = MagicMock(
+        return_value=[{"size": 100, "module": None, "depcount": 10, "deps": None}]
+    )
+    mock_run_all_0 = MagicMock(return_value={"retcode": 0})
+    mock_run_all_1 = MagicMock(return_value={"retcode": 1, "stderr": err_msg})
+
+    with patch("salt.modules.kmod._set_persistent_module", mock_persist):
+        with patch(
+            "salt.utils.path.which",
+            MagicMock(side_effect=[None, "/sbin/modprobe", "/sbin/modprobe"]),
+        ), patch("salt.modules.kmod.lsmod", mock_lsmod):
+            with patch.dict(
+                kmod.__salt__, {"cmd.run_all": mock_run_all_0}
+            ), pytest.raises(CommandExecutionError):
+                kmod.load(mod, True)
+
+            with patch.dict(kmod.__salt__, {"cmd.run_all": mock_run_all_0}):
+                assert [mod] == kmod.load(mod, True)
+
+            with patch.dict(kmod.__salt__, {"cmd.run_all": mock_run_all_1}):
+                assert "Error loading module {}: {}".format(mod, err_msg) == kmod.load(
+                    mod
+                )
+
+
+def test_is_loaded():
+    """
+    Tests if specified kernel module is loaded.
+    """
+    with patch("salt.modules.kmod.mod_list", MagicMock(return_value={"lp"})):
+        assert kmod.is_loaded("lp") is True
+
+
+def test_remove():
+    """
+    Tests to remove the specified kernel module
+    """
+    mod = "cheese"
+    err_msg = "Cannot find module: it has been eaten"
+    mock_persist = MagicMock(return_value={mod})
+    mock_lsmod = MagicMock(
+        return_value=[{"size": 100, "module": None, "depcount": 10, "deps": None}]
+    )
+    mock_run_all_0 = MagicMock(return_value={"retcode": 0})
+    mock_run_all_1 = MagicMock(return_value={"retcode": 1, "stderr": err_msg})
+
+    with patch("salt.modules.kmod._remove_persistent_module", mock_persist):
+        with patch(
+            "salt.utils.path.which",
+            MagicMock(side_effect=[None, "/sbin/rmmod", "/sbin/rmmod", "/sbin/rmmod"]),
+        ), patch("salt.modules.kmod.lsmod", mock_lsmod):
+            with patch.dict(kmod.__salt__, {"cmd.run_all": mock_run_all_0}):
+                with pytest.raises(CommandExecutionError):
+                    kmod.remove(mod)
+
+                assert [mod] == kmod.remove(mod, True)
+
+                assert [] == kmod.remove(mod)
+
+            with patch.dict(kmod.__salt__, {"cmd.run_all": mock_run_all_1}):
+                assert "Error removing module {}: {}".format(
+                    mod, err_msg
+                ) == kmod.remove(mod, True)