inits/pkg/vars/boot.go

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2018-07-06 08:07:37 +00:00
package vars
import (
"bytes"
"fmt"
"io/ioutil"
)
var (
bootVarPrefix = []byte("direktil.var.")
)
func BootArgs() [][]byte {
ba, err := ioutil.ReadFile("/proc/cmdline")
if err != nil {
// should not happen
panic(fmt.Errorf("failed to read /proc/cmdline: ", err))
}
return bytes.Split(ba, []byte{' '})
}
func BootArgValue(prefix, defaultValue string) string {
prefixB := []byte("direktil." + prefix + "=")
for _, ba := range BootArgs() {
if bytes.HasPrefix(ba, prefixB) {
return string(ba[len(prefixB):])
}
}
return defaultValue
}