Example #1
0
// systemctlUnitFileStatus checks whether or not the given unit file has the
// given status: static | enabled | disabled
func systemctlUnitFileStatus(parameters []string) (exitCode int, exitMessage string) {
	// getUnitFilesWithStatuses returns a pair of string slices that hold
	// the name of unit files with their current statuses.
	getUnitFilesWithStatuses := func() (units []string, statuses []string) {
		cmd := exec.Command("systemctl", "--no-pager", "list-unit-files")
		units = wrkutils.CommandColumnNoHeader(0, cmd)
		cmd = exec.Command("systemctl", "--no-pager", "list-unit-files")
		statuses = wrkutils.CommandColumnNoHeader(1, cmd)
		// last two are empty line and junk statistics we don't care about
		msg := fmt.Sprint(cmd.Args) + " didn't output enough lines"
		wrkutils.IndexError(msg, 2, units)
		wrkutils.IndexError(msg, 2, statuses)
		return units[:len(units)-2], statuses[:len(statuses)-2]
	}
	unit := parameters[0]
	status := parameters[1]
	units, statuses := getUnitFilesWithStatuses()
	var actualStatus string
	// TODO check if unit could be found at all
	for i, un := range units {
		if un == unit {
			actualStatus = statuses[i]
			if actualStatus == status {
				return 0, ""
			}
		}
	}
	msg := "Unit didn't have status"
	return wrkutils.GenericError(msg, status, []string{actualStatus})
}
Example #2
0
// module checks to see if a kernel module is installed
func module(parameters []string) (exitCode int, exitMessage string) {
	// kernelModules returns a list of all modules that are currently loaded
	// TODO just read from /proc/modules
	kernelModules := func() (modules []string) {
		cmd := exec.Command("/sbin/lsmod")
		return wrkutils.CommandColumnNoHeader(0, cmd)
	}
	name := parameters[0]
	modules := kernelModules()
	if tabular.StrIn(name, modules) {
		return 0, ""
	}
	return wrkutils.GenericError("Module is not loaded", name, modules)
}
Example #3
0
// running checks if a process is running using `ps aux`, and searching for the
// process name, excluding this process (in case the process name is in the JSON
// file name)
func running(parameters []string) (exitCode int, exitMessage string) {
	// getRunningCommands returns the entries in the "COMMAND" column of `ps aux`
	getRunningCommands := func() (commands []string) {
		cmd := exec.Command("ps", "aux")
		return wrkutils.CommandColumnNoHeader(10, cmd)
	}
	proc := parameters[0]
	// remove this process from consideration
	commands := getRunningCommands()
	var filtered []string
	for _, cmd := range commands {
		if !strings.Contains(cmd, "distributive") {
			filtered = append(filtered, cmd)
		}
	}
	if tabular.StrIn(proc, filtered) {
		return 0, ""
	}
	return wrkutils.GenericError("Process not running", proc, filtered)
}