Feature Request: Allow for defining path used for TempDir

[UranusBytes]

The Linux Level-1 CIS benchmarks set the noexec flag on /tmp. This prevents the agent from being able to execute any scripts (fork/exec /tmp/trmm12345: permission denied)

The createTmpFile of utils.go is passing a blank string for the dir path to CreateTemp that is causing the function to use the path as returned by TempDir. https://pkg.go.dev/os#CreateTemp

rmmagent/agent/utils.go

Lines 312 to 315 in 4b1f993

	func createTmpFile() (*os.File, error) {
	var f *os.File
	f, err := os.CreateTemp("", "trmm")
	if err != nil {

If the value for this path was a variable (Custom Field) defined at the site or agent level that was an empty string by default, then it would continue to use the default TempDir path, but allow for overrides in circumstances where a different path is needed...

[wh1te909]

thanks I reworked the function to handle noexec and fallback to the current dir