42 lines
1.4 KiB
Scheme
42 lines
1.4 KiB
Scheme
;;; Gash -- Guile As SHell
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;;; Copyright 2018 Timothy Sample <samplet@ngyro.com>
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;;;
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;;; This file is part of Gash.
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;;;
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;;; Gash is free software: you can redistribute it and/or modify
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;;; it under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation, either version 3 of the License, or
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;;; (at your option) any later version.
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;;;
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;;; Gash is distributed in the hope that it will be useful,
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;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with Gash. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gash built-ins return)
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#:use-module (gash environment))
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;;; Commentary:
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;;;
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;;; The 'return' utility.
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;;;
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;;; Code:
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(define (main . args)
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(let* ((arg (or (and (pair? args)
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(car (last-pair args)))
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(number->string (get-status))
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"0"))
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(number (string->number arg))
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(status (or (and (exact-integer? number)
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(>= number 0)
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(<= number 256)
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number)
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;; If the above is not true, the exit status is
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;; undefined.
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EXIT_FAILURE)))
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(sh:return status)))
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