Simplify passing of arguments through wwctl container exec

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

CHANGELOG.md

@@ -83,6 +83,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fix issue that NetworkManager marks managed interfaces "unmanaged" if they do
   not have a device specified. #1154
 - Return non-zero exit code on overlay sub-commands #1423
+- Simplify passing of arguments to commands through `wwctl container exec`. #253
 
 ## v4.5.8, 2024-10-01
 

internal/app/wwctl/container/exec/main.go

@@ -61,6 +61,7 @@ func runContainedCmd(cmd *cobra.Command, containerName string, args []string) (e
 	if nodeName != "" {
 		childArgs = append(childArgs, "--node", nodeName)
 	}
+	childArgs = append(childArgs, "--")
 	childArgs = append(childArgs, args...)
 	// copy the files into the container at this stage, es in __child the
 	// command syscall.Exec which replaces the __child process with the

internal/app/wwctl/container/exec/main_test.go

@@ -40,27 +40,27 @@ func Test_Exec(t *testing.T) {
 		{
 			name:   "plain test",
 			args:   []string{"test", "/bin/true"},
-			stdout: `--loglevel 20 container exec __child test /bin/true`,
+			stdout: `--loglevel 20 container exec __child test -- /bin/true`,
 		},
 		{
 			name:   "test with --bind",
 			args:   []string{"test", "--bind", "/tmp", "/bin/true"},
-			stdout: `--loglevel 20 container exec __child test --bind /tmp /bin/true`,
+			stdout: `--loglevel 20 container exec __child test --bind /tmp -- /bin/true`,
 		},
 		{
 			name:   "test with --node",
 			args:   []string{"test", "--node", "node1", "/bin/true"},
-			stdout: `--loglevel 20 container exec __child test --node node1 /bin/true`,
+			stdout: `--loglevel 20 container exec __child test --node node1 -- /bin/true`,
 		},
 		{
 			name:   "test with --node and --bind",
 			args:   []string{"test", "--bind", "/tmp", "--node", "node1", "/bin/true"},
-			stdout: `--loglevel 20 container exec __child test --bind /tmp --node node1 /bin/true`,
+			stdout: `--loglevel 20 container exec __child test --bind /tmp --node node1 -- /bin/true`,
 		},
 		{
 			name:   "test with complex command",
 			args:   []string{"test", "/bin/bash", "echo 'hello'"},
-			stdout: `--loglevel 20 container exec __child test /bin/bash echo 'hello'`,
+			stdout: `--loglevel 20 container exec __child test -- /bin/bash echo 'hello'`,
 		},
 	}