kernel_version_linux.go

     1  // Copyright 2022 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package unix
     6  
     7  import (
     8  	"syscall"
     9  )
    10  
    11  // KernelVersion returns major and minor kernel version numbers
    12  // parsed from the syscall.Uname's Release field, or (0, 0) if
    13  // the version can't be obtained or parsed.
    14  func KernelVersion() (major, minor int) {
    15  	var uname syscall.Utsname
    16  	if err := syscall.Uname(&uname); err != nil {
    17  		return
    18  	}
    19  
    20  	var (
    21  		values    [2]int
    22  		value, vi int
    23  	)
    24  	for _, c := range uname.Release {
    25  		if '0' <= c && c <= '9' {
    26  			value = (value * 10) + int(c-'0')
    27  		} else {
    28  			// Note that we're assuming N.N.N here.
    29  			// If we see anything else, we are likely to mis-parse it.
    30  			values[vi] = value
    31  			vi++
    32  			if vi >= len(values) {
    33  				break
    34  			}
    35  			value = 0
    36  		}
    37  	}
    38  
    39  	return values[0], values[1]
    40  }
    41
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