47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* 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 (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mes/lib.h>
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#include <linux/syscall.h>
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#include <arch/syscall.h>
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#include <stdio.h>
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#include <sys/types.h>
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#if !__MESC__ /* FIXME: We want bin/mes-mescc's x86-linux sha256sum to stay the same. */
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off_t
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_lseek (int filedes, off_t offset, int whence)
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{
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return _sys_call3 (SYS_lseek, (int) filedes, (long) offset, (int) whence);
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}
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#endif
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off_t
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lseek (int filedes, off_t offset, int whence)
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{
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#if !__MESC__ /* FIXME: We want bin/mes-mescc's x86-linux sha256sum to stay the same. */
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if (_lseek (filedes, 0, SEEK_CUR) == -1)
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return -1;
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#endif
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size_t skip = __buffered_read_clear (filedes);
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if (whence == SEEK_CUR)
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offset -= skip;
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return _sys_call3 (SYS_lseek, (int) filedes, (long) offset, (int) whence);
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}
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