Sometimes it is advantageous to use a message file different from the default internally defined by vacation, which is .vacation.msg. For example, consider the need to maintain a menu of messages to chose from, depending on the situation. In the following example, all the messages are kept in a subdirectory:

|"/usr/ucb/vacation -m .vacation/weekend you"

The -m command-line switch causes vacation to reply using the message file specified in place of the default file. Only one -m can be specified. If you attempt to specify more than one message file with multiple -m command-line switches, only the last one listed will be used.