6d3b9b687d
* include/gnu/hurd.h (fd_read): Declare. * include/gnu/syscall.h (SYS__io_read): New value. * lib/gnu/_read.c: New file. * lib/gnu/fd-read.c: New file. * lib/gnu/io-read.c: New file. * build-aux/configure-lib.sh (libc_SOURCES): Add _read sources.
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 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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/** Commentary:
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Inspired by implementation in GNU C Library:
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_hurd_fd_read
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Copyright (C) 1993-2016 Free Software Foundation, Inc.
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*/
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#include <gnu/hurd.h>
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#include <gnu/syscall.h>
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#include <string.h>
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#include <errno.h>
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error_t
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fd_read (mach_port_t port, void *buffer, size_t *read, loff_t offset)
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{
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char *data;
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error_t e = __io_read (port, &data, read, offset, *read);
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if (!e)
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memcpy (buffer, data, *read);
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return e;
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}
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