SCM Session

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3.6 SCM Session

Options, file loading and features can be specified from the command line. See System interface. See Require.
Typing the end-of-file character at the top level session (while SCM is not waiting for parenthesis closure) causes SCM to exit.
Typing the interrupt character aborts evaluation of the current form and resumes the top level read-eval-print loop.

— Function: quit
— Function: quit n
— Function: exit
— Function: exit n

Aliases for exit (see exit). On many systems, SCM can also tail-call another program. See execp.

— Callback procedure: boot-tail dumped?

boot-tail is called by scm_top_level just before entering interactive top-level. If boot-tail calls quit, then interactive top-level is not entered.

— Function: program-arguments

Returns a list of strings of the arguments scm was called with.

— Function: getlogin

Returns the (login) name of the user logged in on the controlling terminal of the process, or #f if this information cannot be determined.

For documentation of the procedures getenv and system See System Interface.

SCM extends getenv as suggested by draft SRFI-98:

— Function: getenv name

Looks up name, a string, in the program environment. If name is found a string of its value is returned. Otherwise, #f is returned. — Function: getenv
Returns names and values of all the environment variables as an association-list.
          (getenv)  ⇒
          (("PATH" . "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin")
           ("USERNAME" . "taro"))

— Function: vms-debug

If SCM is compiled under VMS this vms-debug will invoke the VMS debugger.