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@ -35,6 +35,7 @@ import (
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"tailscale.com/control/controlclient"
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"tailscale.com/drive/driveimpl"
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"tailscale.com/envknob"
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"tailscale.com/hostinfo"
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"tailscale.com/ipn"
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"tailscale.com/ipn/conffile"
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"tailscale.com/ipn/ipnlocal"
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@ -154,6 +155,7 @@ var beCLI func() // non-nil if CLI is linked in
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func main() {
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envknob.PanicIfAnyEnvCheckedInInit()
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envknob.ApplyDiskConfig()
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applyIntegrationTestEnvKnob()
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printVersion := false
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flag.IntVar(&args.verbose, "verbose", 0, "log verbosity level; 0 is default, 1 or higher are increasingly verbose")
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@ -895,3 +897,24 @@ func dieOnPipeReadErrorOfFD(fd int) {
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f.Read(make([]byte, 1))
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os.Exit(1)
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}
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// applyIntegrationTestEnvKnob applies the tailscaled.env=... environment
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// variables specified on the Linux kernel command line, if the VM is being
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// run in NATLab integration tests.
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//
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// They're specified as: tailscaled.env=FOO=bar tailscaled.env=BAR=baz
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func applyIntegrationTestEnvKnob() {
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if runtime.GOOS != "linux" || !hostinfo.IsNATLabGuestVM() {
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return
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}
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cmdLine, _ := os.ReadFile("/proc/cmdline")
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for _, s := range strings.Fields(string(cmdLine)) {
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suf, ok := strings.CutPrefix(s, "tailscaled.env=")
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if !ok {
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continue
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}
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if k, v, ok := strings.Cut(suf, "="); ok {
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envknob.Setenv(k, v)
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}
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}
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}
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