psutil

type PS interface {
	// CPUTimes returns the CPU times statistics.
	CPUTimes(perCPU, totalCPU bool) ([]cpu.TimesStat, error)
	// DiskUsage returns the disk usage statistics.
	DiskUsage(mountPointFilter []string, mountOptsExclude []string, fstypeExclude []string) ([]*disk.UsageStat, []*disk.PartitionStat, error)
	// NetIO returns network I/O statistics for every network interface installed on the system.
	NetIO() ([]net.IOCountersStat, error)
	// NetProto returns network statistics for the entire system.
	NetProto() ([]net.ProtoCountersStat, error)
	// DiskIO returns the disk I/O statistics.
	DiskIO(names []string) (map[string]disk.IOCountersStat, error)
	// VMStat returns the virtual memory statistics.
	VMStat() (*mem.VirtualMemoryStat, error)
	// SwapStat returns the swap memory statistics.
	SwapStat() (*mem.SwapMemoryStat, error)
	// NetConnections returns a list of network connections opened.
	NetConnections() ([]net.ConnectionStat, error)
	// NetConntrack returns more detailed info about the conntrack table.
	NetConntrack(perCPU bool) ([]net.ConntrackStat, error)
}

type PSDiskDeps interface {
	// Partitions returns the disk partition statistics.
	Partitions(all bool) ([]disk.PartitionStat, error)
	// OSGetenv returns the value of the environment variable named by the key.
	OSGetenv(key string) string
	// OSStat returns the FileInfo structure describing the named file.
	OSStat(name string) (os.FileInfo, error)
	// PSDiskUsage returns a file system usage for the specified path.
	PSDiskUsage(path string) (*disk.UsageStat, error)
}

type SystemPS struct {
	PSDiskDeps
	Log telegraf.Logger `toml:"-"`
}

type SystemPSDisk struct{}