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package os
import (
"fmt"
"os/exec"
"syscall"
)
// Given an error, determines if that error is an os/exec ExitError. If it is,
// and the platform is supported, returns the exitCode and nil error.
// Otherwise, passes through the error, and exitCode is undefined.
func GetExitCode(exitErr error) (exitCode int, err error) {
if e, ok := exitErr.(*exec.ExitError); ok {
return getExitCodeSys(e.ProcessState.Sys())
}
return 0, err
}
func getExitCodeSys(sys interface{}) (exitCode int, err error) {
ws, ok := sys.(syscall.WaitStatus)
if !ok {
// Should never happen.
panic(fmt.Sprintf("unknown system exit code type: %T", sys))
}
return ws.ExitStatus(), nil
}
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