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Merge pull request shirou#1117 from tklauser/update-go-sysconf
Update github.com/tklauser/go-sysconf to v0.3.8
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,87 @@ | ||
// +build freebsd openbsd | ||
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package mem | ||
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import ( | ||
"context" | ||
"fmt" | ||
"os/exec" | ||
"strconv" | ||
"strings" | ||
) | ||
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const swapCommand = "/sbin/swapctl" | ||
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// swapctl column indexes | ||
const ( | ||
nameCol = 0 | ||
totalKiBCol = 1 | ||
usedKiBCol = 2 | ||
) | ||
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func SwapDevices() ([]*SwapDevice, error) { | ||
return SwapDevicesWithContext(context.Background()) | ||
} | ||
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func SwapDevicesWithContext(ctx context.Context) ([]*SwapDevice, error) { | ||
output, err := exec.Command(swapCommand, "-lk").Output() | ||
if err != nil { | ||
return nil, fmt.Errorf("could not execute %q: %w", swapCommand, err) | ||
} | ||
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return parseSwapctlOutput(string(output)) | ||
} | ||
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func parseSwapctlOutput(output string) ([]*SwapDevice, error) { | ||
lines := strings.Split(output, "\n") | ||
if len(lines) == 0 { | ||
return nil, fmt.Errorf("could not parse output of %q: no lines in %q", swapCommand, output) | ||
} | ||
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// Check header headerFields are as expected. | ||
header := lines[0] | ||
header = strings.ToLower(header) | ||
header = strings.ReplaceAll(header, ":", "") | ||
headerFields := strings.Fields(header) | ||
if len(headerFields) < usedKiBCol { | ||
return nil, fmt.Errorf("couldn't parse %q: too few fields in header %q", swapCommand, header) | ||
} | ||
if headerFields[nameCol] != "device" { | ||
return nil, fmt.Errorf("couldn't parse %q: expected %q to be %q", swapCommand, headerFields[nameCol], "device") | ||
} | ||
if headerFields[totalKiBCol] != "1kb-blocks" && headerFields[totalKiBCol] != "1k-blocks" { | ||
return nil, fmt.Errorf("couldn't parse %q: expected %q to be %q", swapCommand, headerFields[totalKiBCol], "1kb-blocks") | ||
} | ||
if headerFields[usedKiBCol] != "used" { | ||
return nil, fmt.Errorf("couldn't parse %q: expected %q to be %q", swapCommand, headerFields[usedKiBCol], "used") | ||
} | ||
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var swapDevices []*SwapDevice | ||
for _, line := range lines[1:] { | ||
if line == "" { | ||
continue // the terminal line is typically empty | ||
} | ||
fields := strings.Fields(line) | ||
if len(fields) < usedKiBCol { | ||
return nil, fmt.Errorf("couldn't parse %q: too few fields", swapCommand) | ||
} | ||
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totalKiB, err := strconv.ParseUint(fields[totalKiBCol], 10, 64) | ||
if err != nil { | ||
return nil, fmt.Errorf("couldn't parse 'Size' column in %q: %w", swapCommand, err) | ||
} | ||
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usedKiB, err := strconv.ParseUint(fields[usedKiBCol], 10, 64) | ||
if err != nil { | ||
return nil, fmt.Errorf("couldn't parse 'Used' column in %q: %w", swapCommand, err) | ||
} | ||
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swapDevices = append(swapDevices, &SwapDevice{ | ||
Name: fields[nameCol], | ||
UsedBytes: usedKiB * 1024, | ||
FreeBytes: (totalKiB - usedKiB) * 1024, | ||
}) | ||
} | ||
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return swapDevices, nil | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,63 @@ | ||
// +build freebsd openbsd | ||
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package mem | ||
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import ( | ||
"testing" | ||
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"github.com/stretchr/testify/assert" | ||
) | ||
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const validFreeBSD = `Device: 1kB-blocks Used: | ||
/dev/gpt/swapfs 1048576 1234 | ||
/dev/md0 1048576 666 | ||
` | ||
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const validOpenBSD = `Device 1K-blocks Used Avail Capacity Priority | ||
/dev/wd0b 655025 1234 653791 1% 0 | ||
` | ||
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const invalid = `Device: 512-blocks Used: | ||
/dev/gpt/swapfs 1048576 1234 | ||
/dev/md0 1048576 666 | ||
` | ||
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func TestParseSwapctlOutput_FreeBSD(t *testing.T) { | ||
assert := assert.New(t) | ||
stats, err := parseSwapctlOutput(validFreeBSD) | ||
assert.NoError(err) | ||
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assert.Equal(*stats[0], SwapDevice{ | ||
Name: "/dev/gpt/swapfs", | ||
UsedBytes: 1263616, | ||
FreeBytes: 1072478208, | ||
}) | ||
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assert.Equal(*stats[1], SwapDevice{ | ||
Name: "/dev/md0", | ||
UsedBytes: 681984, | ||
FreeBytes: 1073059840, | ||
}) | ||
} | ||
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func TestParseSwapctlOutput_OpenBSD(t *testing.T) { | ||
assert := assert.New(t) | ||
stats, err := parseSwapctlOutput(validOpenBSD) | ||
assert.NoError(err) | ||
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assert.Equal(*stats[0], SwapDevice{ | ||
Name: "/dev/wd0b", | ||
UsedBytes: 1234 * 1024, | ||
FreeBytes: 653791 * 1024, | ||
}) | ||
} | ||
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func TestParseSwapctlOutput_Invalid(t *testing.T) { | ||
_, err := parseSwapctlOutput(invalid) | ||
assert.Error(t, err) | ||
} | ||
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func TestParseSwapctlOutput_Empty(t *testing.T) { | ||
_, err := parseSwapctlOutput("") | ||
assert.Error(t, err) | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,5 +1,4 @@ | ||
// +build darwin | ||
// +build cgo | ||
// +build darwin,cgo | ||
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package mem | ||
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|
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,5 +1,4 @@ | ||
// +build darwin | ||
// +build !cgo | ||
// +build darwin,!cgo | ||
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package mem | ||
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|
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