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| | ;;; emacs-tests.el --- unit tests for emacs.c -*- lexical-binding: t; -*-
;; Copyright (C) 2020 Free Software Foundation, Inc.
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Unit tests for src/emacs.c.
;;; Code:
(require 'cl-lib)
(require 'ert)
(require 'ert-x)
(require 'subr-x)
(ert-deftest emacs-tests/seccomp/absent-file ()
(let ((emacs (expand-file-name invocation-name invocation-directory))
(process-environment nil))
(skip-unless (file-executable-p emacs))
(should-not (file-exists-p "/does-not-exist.bpf"))
(should-not
(eql (call-process emacs nil nil nil
"--quick" "--batch" "--seccomp=/does-not-exist.bpf")
0))))
(cl-defmacro emacs-tests--with-temp-file
(var (prefix &optional suffix text) &rest body)
"Evaluate BODY while a new temporary file exists.
Bind VAR to the name of the file. Pass PREFIX, SUFFIX, and TEXT
to `make-temp-file', which see."
(declare (indent 2) (debug (symbolp (form form form) body)))
(cl-check-type var symbol)
;; Use an uninterned symbol so that the code still works if BODY changes VAR.
(let ((filename (make-symbol "filename")))
`(let ((,filename (make-temp-file ,prefix nil ,suffix ,text)))
(unwind-protect
(let ((,var ,filename))
,@body)
(delete-file ,filename)))))
(ert-deftest emacs-tests/seccomp/empty-file ()
(let ((emacs (expand-file-name invocation-name invocation-directory))
(process-environment nil))
(skip-unless (file-executable-p emacs))
(emacs-tests--with-temp-file filter ("seccomp-invalid-" ".bpf")
;; The --seccomp option is processed early, without filename handlers.
;; Therefore remote or quoted filenames wouldn't work.
(should-not (file-remote-p filter))
(cl-callf file-name-unquote filter)
;; According to the Seccomp man page, a filter must have at least one
;; element, so Emacs should reject an empty file.
(should-not
(eql (call-process emacs nil nil nil
"--quick" "--batch" (concat "--seccomp=" filter))
0)))))
(ert-deftest emacs-tests/seccomp/invalid-file-size ()
(let ((emacs (expand-file-name invocation-name invocation-directory))
(process-environment nil))
(skip-unless (file-executable-p emacs))
(emacs-tests--with-temp-file filter ("seccomp-invalid-" ".bpf" "123456")
;; The --seccomp option is processed early, without filename handlers.
;; Therefore remote or quoted filenames wouldn't work.
(should-not (file-remote-p filter))
(cl-callf file-name-unquote filter)
;; The Seccomp filter file must have a file size that's a multiple of the
;; size of struct sock_filter, which is 8 or 16, but never 6.
(should-not
(eql (call-process emacs nil nil nil
"--quick" "--batch" (concat "--seccomp=" filter))
0)))))
(ert-deftest emacs-tests/seccomp/allows-stdout ()
(let ((emacs (expand-file-name invocation-name invocation-directory))
(filter (ert-resource-file "seccomp-filter.bpf"))
(process-environment nil))
(skip-unless (file-executable-p emacs))
(skip-unless (file-readable-p filter))
;; The --seccomp option is processed early, without filename handlers.
;; Therefore remote or quoted filenames wouldn't work.
(should-not (file-remote-p filter))
(cl-callf file-name-unquote filter)
(with-temp-buffer
(let ((status (call-process emacs nil t nil
"--quick" "--batch"
(concat "--seccomp=" filter)
(concat "--eval=" (prin1-to-string
'(message "Hi"))))))
(ert-info ((format "Process output: %s" (buffer-string)))
(should (eql status 0)))
(should (equal (string-trim (buffer-string)) "Hi"))))))
(ert-deftest emacs-tests/seccomp/forbids-subprocess ()
(let ((emacs (expand-file-name invocation-name invocation-directory))
(filter (ert-resource-file "seccomp-filter.bpf"))
(process-environment nil))
(skip-unless (file-executable-p emacs))
(skip-unless (file-readable-p filter))
;; The --seccomp option is processed early, without filename handlers.
;; Therefore remote or quoted filenames wouldn't work.
(should-not (file-remote-p filter))
(cl-callf file-name-unquote filter)
(with-temp-buffer
(let ((status
(call-process
emacs nil t nil
"--quick" "--batch"
(concat "--seccomp=" filter)
(concat "--eval=" (prin1-to-string
`(call-process ,emacs nil nil nil
"--version"))))))
(ert-info ((format "Process output: %s" (buffer-string)))
(should-not (eql status 0)))))))
;;; emacs-tests.el ends here
|