57 lines
1.7 KiB
Go
57 lines
1.7 KiB
Go
package helper
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import (
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"fmt"
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"os"
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"path/filepath"
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"runtime"
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"strings"
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"github.com/safing/portbase/log"
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"github.com/safing/portbase/updater"
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)
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var pmElectronUpdate *updater.File
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const suidBitWarning = `Failed to set SUID permissions for chrome-sandbox.
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This is required for Linux kernel versions that do not have unprivileged user namespaces (CONFIG_USER_NS_UNPRIVILEGED) enabled.
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If you're running and up-to-date distribution kernel you can likely ignore this warning. If you encounter issue starting the
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user interface please either update your kernel or set the SUID bit (mode 0%0o) on %s`
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// EnsureChromeSandboxPermissions makes sure the chrome-sandbox distributed
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// by our app-electron package has the SUID bit set on systems that do not
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// allow unprivileged CLONE_NEWUSER (clone(3)).
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// On non-linux systems or systems that have kernel.unprivileged_userns_clone
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// set to 1 EnsureChromeSandboPermissions is a NO-OP.
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func EnsureChromeSandboxPermissions(reg *updater.ResourceRegistry) error {
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if runtime.GOOS != "linux" {
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return nil
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}
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if pmElectronUpdate != nil && !pmElectronUpdate.UpgradeAvailable() {
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return nil
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}
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identifier := PlatformIdentifier("app/portmaster-app.zip")
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var err error
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pmElectronUpdate, err = reg.GetFile(identifier)
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if err != nil {
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return fmt.Errorf("failed to get file: %w", err)
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}
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unpackedPath := strings.TrimSuffix(
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pmElectronUpdate.Path(),
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filepath.Ext(pmElectronUpdate.Path()),
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)
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sandboxFile := filepath.Join(unpackedPath, "chrome-sandbox")
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if err := os.Chmod(sandboxFile, 0o0755|os.ModeSetuid); err != nil {
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log.Warningf(suidBitWarning, 0o0755 | os.ModeSetuid, sandboxFile)
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return fmt.Errorf("failed to chmod: %w", err)
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}
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log.Infof("updates: fixed SUID permission for chrome-sandbox")
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return nil
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}
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