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Fixed #115, added option to save last successfully logged in user for…
… next login screen.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| package src | ||
|
|
||
| import ( | ||
| "bufio" | ||
| "fmt" | ||
| "os" | ||
| "strings" | ||
| ) | ||
|
|
||
| const ( | ||
| pathLastLoggedInUser = "/var/cache/emptty/lastuser" | ||
| ) | ||
|
|
||
| type enSelectLastUser byte | ||
|
|
||
| const ( | ||
| // Do not preselect any last user | ||
| False enSelectLastUser = iota | ||
|
|
||
| // Preselect last successfully logged in user per tty | ||
| PerTty | ||
|
|
||
| // Preselect last successfully logged in user per system | ||
| Global | ||
| ) | ||
|
|
||
| type authBase struct { | ||
| } | ||
|
|
||
| // Performs input selection user. If saving last user is enabled (PerTty/Global), user is read from defined path and used as predefined value. | ||
| func (a *authBase) selectUser(c *config) (string, error) { | ||
| lastUser := a.getLastSelectedUser(c) | ||
| if !c.HideEnterLogin { | ||
| hostname, _ := os.Hostname() | ||
| lastUserDisplay := "" | ||
| if lastUser != "" { | ||
| lastUserDisplay = " [" + lastUser + "]" | ||
| } | ||
| fmt.Printf("%s login%s: ", hostname, lastUserDisplay) | ||
| } | ||
| input, err := bufio.NewReader(os.Stdin).ReadString('\n') | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| username := input[:len(input)-1] | ||
|
|
||
| if lastUser != "" && username == "" { | ||
| username = lastUser | ||
| } | ||
| return username, nil | ||
| } | ||
|
|
||
| // Gets last selected user with respect to configuration. | ||
| func (a *authBase) getLastSelectedUser(c *config) string { | ||
| switch c.SelectLastUser { | ||
| case PerTty: | ||
| return a.readLastUser(pathLastLoggedInUser + "-" + c.strTTY()) | ||
| case Global: | ||
| return a.readLastUser(pathLastLoggedInUser) | ||
| } | ||
| return "" | ||
| } | ||
|
|
||
| // Reads last user from file on path. | ||
| func (a *authBase) readLastUser(path string) string { | ||
| b, err := os.ReadFile(path) | ||
| if err != nil { | ||
| if !os.IsNotExist(err) { | ||
| logPrint(err) | ||
| } | ||
| return "" | ||
| } | ||
| lastUser := strings.TrimSpace(string(b)) | ||
| if strings.Contains(lastUser, "\n") { | ||
| return "" | ||
| } | ||
| return lastUser | ||
| } | ||
|
|
||
| // Saves last selected user with respect to configuration. | ||
| func (a *authBase) saveLastSelectedUser(c *config, username string) { | ||
| if c.SelectLastUser == False { | ||
| return | ||
| } | ||
|
|
||
| path := pathLastLoggedInUser | ||
| if c.SelectLastUser == PerTty { | ||
| path += "-" + c.strTTY() | ||
| } | ||
|
|
||
| if err := mkDirsForFile(path, 0700); err != nil { | ||
| logPrint(err) | ||
| } | ||
| if err := os.WriteFile(path, []byte(username), 0600); err != nil { | ||
| logPrint(err) | ||
| } | ||
| } |
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