// 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})
}
// 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)
}
// 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)
}