67 lines
1.1 KiB
Go
67 lines
1.1 KiB
Go
package app
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import (
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"os/exec"
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"sync"
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)
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type App interface {
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// ID returns a copy of App's unique ID.
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ID() ID
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// Start sets up the system and starts the App.
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Start() error
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// Wait waits for App's process to exit and reverts system setup.
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Wait() (int, error)
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// WaitErr returns error returned by the underlying wait syscall.
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WaitErr() error
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Seal(config *Config) error
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String() string
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}
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type app struct {
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// application unique identifier
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id *ID
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// underlying user switcher process
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cmd *exec.Cmd
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// child process related information
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seal *appSeal
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// error returned waiting for process
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waitErr error
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lock sync.RWMutex
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}
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func (a *app) ID() ID {
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return *a.id
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}
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func (a *app) String() string {
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if a == nil {
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return "(invalid fortified app)"
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}
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a.lock.RLock()
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defer a.lock.RUnlock()
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if a.cmd != nil {
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return a.cmd.String()
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}
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if a.seal != nil {
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return "(sealed fortified app as uid " + a.seal.sys.user.Uid + ")"
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}
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return "(unsealed fortified app)"
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}
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func (a *app) WaitErr() error {
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return a.waitErr
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}
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func New() (App, error) {
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a := new(app)
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a.id = new(ID)
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return a, newAppID(a.id)
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}
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