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Merge pull request #502 from essentialkaos/develop
Version 13.4.0
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| package sysctl | ||
|
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| // ////////////////////////////////////////////////////////////////////////////////// // | ||
| // // | ||
| // Copyright (c) 2024 ESSENTIAL KAOS // | ||
| // Apache License, Version 2.0 <https://www.apache.org/licenses/LICENSE-2.0> // | ||
| // // | ||
| // ////////////////////////////////////////////////////////////////////////////////// // | ||
|
|
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| import ( | ||
| "fmt" | ||
| ) | ||
|
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| // ////////////////////////////////////////////////////////////////////////////////// // | ||
|
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| func ExampleGet() { | ||
| paramValue, err := Get("kernel.random.boot_id") | ||
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| if err != nil { | ||
| panic(err.Error()) | ||
| } | ||
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| fmt.Printf("Boot ID: %s\n", paramValue) | ||
| } | ||
|
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| func ExampleGetI() { | ||
| paramValue, err := GetI("kernel.pty.max") | ||
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| if err != nil { | ||
| panic(err.Error()) | ||
| } | ||
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| fmt.Printf("PTY Max: %d\n", paramValue) | ||
| } | ||
|
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| func ExampleGetI64() { | ||
| paramValue, err := GetI64("fs.file-max") | ||
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| if err != nil { | ||
| panic(err.Error()) | ||
| } | ||
|
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| fmt.Printf("File max: %d\n", paramValue) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| //go:build linux || darwin | ||
| // +build linux darwin | ||
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| // Package sysctl provides methods for reading kernel parameters | ||
| package sysctl | ||
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| // ////////////////////////////////////////////////////////////////////////////////// // | ||
| // // | ||
| // Copyright (c) 2024 ESSENTIAL KAOS // | ||
| // Apache License, Version 2.0 <https://www.apache.org/licenses/LICENSE-2.0> // | ||
| // // | ||
| // ////////////////////////////////////////////////////////////////////////////////// // | ||
|
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| import ( | ||
| "fmt" | ||
| "strconv" | ||
| "strings" | ||
| ) | ||
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| // ////////////////////////////////////////////////////////////////////////////////// // | ||
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| // binary is sysctl binary name | ||
| var binary = "sysctl" | ||
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| // procFS is path to procfs | ||
| var procFS = "/proc/sys" | ||
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| // ////////////////////////////////////////////////////////////////////////////////// // | ||
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| // Get returns kernel parameter value as a string | ||
| func Get(param string) (string, error) { | ||
| switch { | ||
| case param == "": | ||
| return "", fmt.Errorf("Kernel parameter name cannot be empty") | ||
| case !strings.Contains(param, ".") || strings.ContainsAny(param, " /\n\t"): | ||
| return "", fmt.Errorf("Invalid parameter name %q", param) | ||
| } | ||
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| return getKernelParam(param) | ||
| } | ||
|
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| // GetI returns kernel parameter value as an int | ||
| func GetI(param string) (int, error) { | ||
| p, err := Get(param) | ||
|
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| if err != nil { | ||
| return 0, err | ||
| } | ||
|
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| i, err := strconv.Atoi(p) | ||
|
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| if err != nil { | ||
| return 0, fmt.Errorf("Can't parse %q parameter as int: %w", param, err) | ||
| } | ||
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| return i, nil | ||
| } | ||
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| // GetI64 returns kernel parameter value as an int64 | ||
| func GetI64(param string) (int64, error) { | ||
| p, err := Get(param) | ||
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| if err != nil { | ||
| return 0, err | ||
| } | ||
|
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| i, err := strconv.ParseInt(p, 10, 64) | ||
|
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| if err != nil { | ||
| return 0, fmt.Errorf("Can't parse %q parameter as int64: %w", param, err) | ||
| } | ||
|
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| return i, nil | ||
| } | ||
|
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| // ////////////////////////////////////////////////////////////////////////////////// // |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| package sysctl | ||
|
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| // ////////////////////////////////////////////////////////////////////////////////// // | ||
| // // | ||
| // Copyright (c) 2024 ESSENTIAL KAOS // | ||
| // Apache License, Version 2.0 <https://www.apache.org/licenses/LICENSE-2.0> // | ||
| // // | ||
| // ////////////////////////////////////////////////////////////////////////////////// // | ||
|
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| import ( | ||
| "os/exec" | ||
| "strings" | ||
| ) | ||
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| // ////////////////////////////////////////////////////////////////////////////////// // | ||
|
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| // getKernelParam reads kernel parameter from procfs | ||
| func getKernelParam(param string) (string, error) { | ||
| output, err := exec.Command(binary, "-n", param).Output() | ||
| return strings.Trim(string(output), "\n\r"), err | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| package sysctl | ||
|
|
||
| // ////////////////////////////////////////////////////////////////////////////////// // | ||
| // // | ||
| // Copyright (c) 2024 ESSENTIAL KAOS // | ||
| // Apache License, Version 2.0 <https://www.apache.org/licenses/LICENSE-2.0> // | ||
| // // | ||
| // ////////////////////////////////////////////////////////////////////////////////// // | ||
|
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| import ( | ||
| "fmt" | ||
| "os" | ||
| "strings" | ||
|
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| "github.com/essentialkaos/ek/v13/path" | ||
| ) | ||
|
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| // ////////////////////////////////////////////////////////////////////////////////// // | ||
|
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| // getKernelParam reads kernel parameter from procfs | ||
| func getKernelParam(param string) (string, error) { | ||
| p, err := os.ReadFile(path.Clean(path.Join( | ||
| procFS, strings.ReplaceAll(param, ".", "/"), | ||
| ))) | ||
|
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| if err != nil { | ||
| return "", fmt.Errorf("Can't read parameter %q: %w", param, err) | ||
| } | ||
|
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| return strings.Trim(string(p), "\n\r"), nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| //go:build !linux && !darwin | ||
| // +build !linux,!darwin | ||
|
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| // Package sysctl provides methods for reading kernel parameters | ||
| package sysctl | ||
|
|
||
| // ////////////////////////////////////////////////////////////////////////////////// // | ||
| // // | ||
| // Copyright (c) 2024 ESSENTIAL KAOS // | ||
| // Apache License, Version 2.0 <https://www.apache.org/licenses/LICENSE-2.0> // | ||
| // // | ||
| // ////////////////////////////////////////////////////////////////////////////////// // | ||
|
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| // Get returns kernel parameter value as a string | ||
| func Get(param string) (string, error) { | ||
| return "", nil | ||
| } | ||
|
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| // GetI returns kernel parameter value as an int | ||
| func GetI(param string) (int, error) { | ||
| return 0, nil | ||
| } | ||
|
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| // GetI64 returns kernel parameter value as an int64 | ||
| func GetI64(param string) (int64, error) { | ||
| return 0, nil | ||
| } |
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