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Move parsing functions to pkg/parsers and the specific kernel handling
functions to pkg/parsers/kernel, and parsing filters to pkg/parsers/filter. Adjust imports and package references. Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <[email protected]> (github: erikh)
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Jul 29, 2014
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| Erik Hollensbe <[email protected]> (@erikh) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| package kernel | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "errors" | ||
| "fmt" | ||
| ) | ||
|
|
||
| type KernelVersionInfo struct { | ||
| Kernel int | ||
| Major int | ||
| Minor int | ||
| Flavor string | ||
| } | ||
|
|
||
| func (k *KernelVersionInfo) String() string { | ||
| return fmt.Sprintf("%d.%d.%d%s", k.Kernel, k.Major, k.Minor, k.Flavor) | ||
| } | ||
|
|
||
| // Compare two KernelVersionInfo struct. | ||
| // Returns -1 if a < b, 0 if a == b, 1 it a > b | ||
| func CompareKernelVersion(a, b *KernelVersionInfo) int { | ||
| if a.Kernel < b.Kernel { | ||
| return -1 | ||
| } else if a.Kernel > b.Kernel { | ||
| return 1 | ||
| } | ||
|
|
||
| if a.Major < b.Major { | ||
| return -1 | ||
| } else if a.Major > b.Major { | ||
| return 1 | ||
| } | ||
|
|
||
| if a.Minor < b.Minor { | ||
| return -1 | ||
| } else if a.Minor > b.Minor { | ||
| return 1 | ||
| } | ||
|
|
||
| return 0 | ||
| } | ||
|
|
||
| func GetKernelVersion() (*KernelVersionInfo, error) { | ||
| var ( | ||
| err error | ||
| ) | ||
|
|
||
| uts, err := uname() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| release := make([]byte, len(uts.Release)) | ||
|
|
||
| i := 0 | ||
| for _, c := range uts.Release { | ||
| release[i] = byte(c) | ||
| i++ | ||
| } | ||
|
|
||
| // Remove the \x00 from the release for Atoi to parse correctly | ||
| release = release[:bytes.IndexByte(release, 0)] | ||
|
|
||
| return ParseRelease(string(release)) | ||
| } | ||
|
|
||
| func ParseRelease(release string) (*KernelVersionInfo, error) { | ||
| var ( | ||
| kernel, major, minor, parsed int | ||
| flavor, partial string | ||
| ) | ||
|
|
||
| // Ignore error from Sscanf to allow an empty flavor. Instead, just | ||
| // make sure we got all the version numbers. | ||
| parsed, _ = fmt.Sscanf(release, "%d.%d%s", &kernel, &major, &partial) | ||
| if parsed < 2 { | ||
| return nil, errors.New("Can't parse kernel version " + release) | ||
| } | ||
|
|
||
| // sometimes we have 3.12.25-gentoo, but sometimes we just have 3.12-1-amd64 | ||
| parsed, _ = fmt.Sscanf(partial, ".%d%s", &minor, &flavor) | ||
| if parsed < 1 { | ||
| flavor = partial | ||
| } | ||
|
|
||
| return &KernelVersionInfo{ | ||
| Kernel: kernel, | ||
| Major: major, | ||
| Minor: minor, | ||
| Flavor: flavor, | ||
| }, nil | ||
| } |
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