Mercurial > octave
view scripts/miscellaneous/private/tar_is_bsd.m @ 31706:597f3ee61a48 stable
update Octave Project Developers copyright for the new year
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 06 Jan 2023 13:11:27 -0500 |
parents | fd29c7a50a78 |
children | 2e484f9f1f18 |
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######################################################################## ## ## Copyright (C) 2019-2023 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## This file is part of Octave. ## ## Octave 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. ## ## Octave 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 Octave; see the file COPYING. If not, see ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {@var{out} =} tar_is_bsd () ## True if the default tar command is BSD tar. ## ## Checks whether the default tar command (the one invoked when an un-prefixed ## @code{tar} is executed) is BSD tar or another tar. Caches the results for ## performance. ## ## Returns true if the detected tar is BSD tar, and false otherwise. Errors if ## @code{tar --version} does not succeed. ## @end deftypefn function out = tar_is_bsd () ## BSD tar needs to be handled differently from GNU tar persistent cache; if (isempty (cache)) [status, tar_ver_str] = system ("tar --version"); if (status) error ("tar: Failed executing tar --version (status = %d)", status); endif cache = ! isempty (regexp (tar_ver_str, "bsdtar")); endif out = cache; endfunction