| [Overview][Constants][Types][Procedures and functions][Variables][Index] | 
| 
 | Returned by getopt,getlongopts to indicate that there are no more options. | |
| 
 | Specifies that a long option does not take an argument. | |
| 
 | Specifies that a long option optionally takes an argument. | |
| 
 | Character indicating an option on the command-line. | |
| 
 | Specifies that a long option needs an argument. |