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remove dependency on docker - by vendoring
reexec (#11334)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| // This file originates from Docker/Moby, | ||
| // https://github.com/moby/moby/blob/master/pkg/reexec/reexec.go | ||
| // Licensed under Apache License 2.0: https://github.com/moby/moby/blob/master/LICENSE | ||
| // Copyright 2013-2018 Docker, Inc. | ||
| // | ||
| // Package reexec facilitates the busybox style reexec of the docker binary that | ||
| // we require because of the forking limitations of using Go. Handlers can be | ||
| // registered with a name and the argv 0 of the exec of the binary will be used | ||
| // to find and execute custom init paths. | ||
| package reexec | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
| ) | ||
|
|
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| var registeredInitializers = make(map[string]func()) | ||
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| // Register adds an initialization func under the specified name | ||
| func Register(name string, initializer func()) { | ||
| if _, exists := registeredInitializers[name]; exists { | ||
| panic(fmt.Sprintf("reexec func already registered under name %q", name)) | ||
| } | ||
| registeredInitializers[name] = initializer | ||
| } | ||
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| // Init is called as the first part of the exec process and returns true if an | ||
| // initialization function was called. | ||
| func Init() bool { | ||
| if initializer, ok := registeredInitializers[os.Args[0]]; ok { | ||
| initializer() | ||
| return true | ||
| } | ||
| return false | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| // This file originates from Docker/Moby, | ||
| // https://github.com/moby/moby/blob/master/pkg/reexec/ | ||
| // Licensed under Apache License 2.0: https://github.com/moby/moby/blob/master/LICENSE | ||
| // Copyright 2013-2018 Docker, Inc. | ||
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| //go:build linux | ||
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| package reexec | ||
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| // Self returns the path to the current process's binary. | ||
| // Returns "/proc/self/exe". | ||
| func Self() string { | ||
| return "/proc/self/exe" | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| // This file originates from Docker/Moby, | ||
| // https://github.com/moby/moby/blob/master/pkg/reexec/ | ||
| // Licensed under Apache License 2.0: https://github.com/moby/moby/blob/master/LICENSE | ||
| // Copyright 2013-2018 Docker, Inc. | ||
|
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| //go:build !linux | ||
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| package reexec | ||
|
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| import ( | ||
| "os" | ||
| "os/exec" | ||
| "path/filepath" | ||
| ) | ||
|
|
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| // Self returns the path to the current process's binary. | ||
| // Uses os.Args[0]. | ||
| func Self() string { | ||
| name := os.Args[0] | ||
| if filepath.Base(name) == name { | ||
| if lp, err := exec.LookPath(name); err == nil { | ||
| return lp | ||
| } | ||
| } | ||
| // handle conversion of relative paths to absolute | ||
| if absName, err := filepath.Abs(name); err == nil { | ||
| return absName | ||
| } | ||
| // if we couldn't get absolute name, return original | ||
| // (NOTE: Go only errors on Abs() if os.Getwd fails) | ||
| return name | ||
| } |
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