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@ -122,7 +122,7 @@ func nonGlobalZoneMemoryCapacity() (uint64, error) {
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return memSizeBytes, nil
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}
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const swapsCommand = "swap"
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const swapCommand = "swap"
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// The blockSize as reported by `swap -l`. See https://docs.oracle.com/cd/E23824_01/html/821-1459/fsswap-52195.html
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const blockSize = 512
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@ -141,13 +141,13 @@ func SwapDevices() ([]*SwapDevice, error) {
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}
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func SwapDevicesWithContext(ctx context.Context) ([]*SwapDevice, error) {
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swapsCommandPath, err := exec.LookPath(swapsCommand)
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swapCommandPath, err := exec.LookPath(swapCommand)
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if err != nil {
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return nil, fmt.Errorf("could not find command %q: %w", swapsCommand, err)
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return nil, fmt.Errorf("could not find command %q: %w", swapCommand, err)
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}
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output, err := invoke.CommandWithContext(ctx, swapsCommandPath, "-l")
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output, err := invoke.CommandWithContext(ctx, swapCommandPath, "-l")
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if err != nil {
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return nil, fmt.Errorf("could not execute %q: %w", swapsCommand, err)
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return nil, fmt.Errorf("could not execute %q: %w", swapCommand, err)
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}
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return parseSwapsCommandOutput(string(output))
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@ -156,22 +156,22 @@ func SwapDevicesWithContext(ctx context.Context) ([]*SwapDevice, error) {
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func parseSwapsCommandOutput(output string) ([]*SwapDevice, error) {
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lines := strings.Split(output, "\n")
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if len(lines) == 0 {
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return nil, fmt.Errorf("could not parse output of %q: no lines in %q", swapsCommand, output)
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return nil, fmt.Errorf("could not parse output of %q: no lines in %q", swapCommand, output)
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}
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// Check header headerFields are as expected.
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headerFields := strings.Fields(lines[0])
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if len(headerFields) < freeBlocksCol {
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return nil, fmt.Errorf("couldn't parse %q: too few fields in header %q", swapsCommand, lines[0])
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return nil, fmt.Errorf("couldn't parse %q: too few fields in header %q", swapCommand, lines[0])
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}
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if headerFields[nameCol] != "swapfile" {
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return nil, fmt.Errorf("couldn't parse %q: expected %q to be %q", swapsCommand, headerFields[nameCol], "swapfile")
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return nil, fmt.Errorf("couldn't parse %q: expected %q to be %q", swapCommand, headerFields[nameCol], "swapfile")
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}
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if headerFields[totalBlocksCol] != "blocks" {
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return nil, fmt.Errorf("couldn't parse %q: expected %q to be %q", swapsCommand, headerFields[totalBlocksCol], "blocks")
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return nil, fmt.Errorf("couldn't parse %q: expected %q to be %q", swapCommand, headerFields[totalBlocksCol], "blocks")
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}
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if headerFields[freeBlocksCol] != "free" {
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return nil, fmt.Errorf("couldn't parse %q: expected %q to be %q", swapsCommand, headerFields[freeBlocksCol], "free")
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return nil, fmt.Errorf("couldn't parse %q: expected %q to be %q", swapCommand, headerFields[freeBlocksCol], "free")
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}
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var swapDevices []*SwapDevice
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@ -181,17 +181,17 @@ func parseSwapsCommandOutput(output string) ([]*SwapDevice, error) {
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}
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fields := strings.Fields(line)
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if len(fields) < freeBlocksCol {
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return nil, fmt.Errorf("couldn't parse %q: too few fields", swapsCommand)
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return nil, fmt.Errorf("couldn't parse %q: too few fields", swapCommand)
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}
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totalBlocks, err := strconv.ParseUint(fields[totalBlocksCol], 10, 64)
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if err != nil {
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return nil, fmt.Errorf("couldn't parse 'Size' column in %q: %w", swapsCommand, err)
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return nil, fmt.Errorf("couldn't parse 'Size' column in %q: %w", swapCommand, err)
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}
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freeBlocks, err := strconv.ParseUint(fields[freeBlocksCol], 10, 64)
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if err != nil {
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return nil, fmt.Errorf("couldn't parse 'Used' column in %q: %w", swapsCommand, err)
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return nil, fmt.Errorf("couldn't parse 'Used' column in %q: %w", swapCommand, err)
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}
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swapDevices = append(swapDevices, &SwapDevice{
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