pyrox.dev
1diff --git a/src/cmd/linuxkit/vendor/github.com/Code-Hex/vz/v3/osversion.go b/src/cmd/linuxkit/vendor/github.com/Code-Hex/vz/v3/osversion.go
2index d72a7856d..b186d3aff 100644
3--- a/src/cmd/linuxkit/vendor/github.com/Code-Hex/vz/v3/osversion.go
4+++ b/src/cmd/linuxkit/vendor/github.com/Code-Hex/vz/v3/osversion.go
5@@ -9,6 +9,7 @@ import "C"
6 import (
7 "errors"
8 "fmt"
9+ "os/exec"
10 "strconv"
11 "strings"
12 "sync"
13@@ -48,6 +49,40 @@ func fetchMajorMinorVersion() (float64, error) {
14 if err != nil {
15 return 0, err
16 }
17+
18+ // For backward compatibility reasons, if code compiled against an SDK
19+ // earlier than macOS 11 is run on macOS 11 or later, and then tries to read
20+ // value of kern.osproductversion, the OS will return the value "10.16"
21+ // instead of the real OS version string. By contrast, the command `sw_vers
22+ // -productVersion` will return the real OS version string unless the
23+ // environment variable SYSTEM_VERSION_COMPAT is set to 1 or 2, in which
24+ // case it will respectively return "10.16" and "15.7" (the latter is for
25+ // some iOS compatibility reason).
26+ //
27+ // The only (currently) sure way to get the real OS version string
28+ // regardless of SYSTEM_VERSION_COMPAT or the SDK compiled against is
29+ // apparently to parse
30+ // /System/Library/CoreServices/.SystemVersionPlatform.plist if it exists,
31+ // and /System/Library/CoreServices/SystemVersion.plist otherwise. Doing
32+ // so, however, requires parsing XML plist files.
33+ //
34+ // Given what this library does, it doesn't seem likely that there would be
35+ // a good reason to run its code with SYSTEM_VERSION_COMPAT set, so using
36+ // `sw_vers` should be adequate until a proper parsing of plist files is
37+ // added.
38+ //
39+ // See https://github.com/ziglang/zig/issues/7569,
40+ // https://github.com/ziglang/zig/pull/7714 and
41+ // https://eclecticlight.co/2020/08/13/macos-version-numbering-isnt-so-simple/
42+ // for more information.
43+ if osver == "10.16" {
44+ out, err := exec.Command("sw_vers", "-productVersion").Output()
45+ if err != nil {
46+ return 0, err
47+ }
48+ osver = strings.TrimRight(string(out), "\r\n")
49+ }
50+
51 prefix := "v"
52 majorMinor := strings.TrimPrefix(semver.MajorMinor(prefix+osver), prefix)
53 version, err := strconv.ParseFloat(majorMinor, 64)