77 lines
2.5 KiB
C
77 lines
2.5 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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#include <gnu/syscall.h>
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#include <string.h>
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#include <sys/stat.h>
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struct mach_msg_string_int_int
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{
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mach_msg_header_t header;
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mach_msg_type_t type_one; string_t one;
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mach_msg_type_t type_two; int two;
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mach_msg_type_t type_three; int three;
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};
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struct mach_msg_int_int_string_int
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{
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mach_msg_header_t header;
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mach_msg_type_t type_one; int one;
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mach_msg_type_t type_two; int two;
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mach_msg_type_t type_three; string_t three;
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mach_msg_type_t type_four; int four;
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};
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mach_msg_type_t mach_msg_type_file_name =
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{
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/* msgt_name = */ (unsigned char) MACH_MSG_TYPE_STRING_C,
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/* msgt_size = */ 8,
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/* msgt_number = */ 1024,
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/* msgt_inline = */ 1,
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/* msgt_longform = */ 0,
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/* msgt_deallocate = */ 0,
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/* msgt_unused = */ 0
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};
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kern_return_t __dir_lookup (file_t start_dir, string_t file_name, int flags, mode_t mode, retry_type *do_retry, string_t retry_name, mach_port_t *port)
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{
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union message
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{
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struct mach_msg_string_int_int request;
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struct mach_msg_int_int_string_int reply;
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};
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union message message = {0};
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message.request.header.msgh_size = sizeof (message.request);
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message.request.type_one = mach_msg_type_file_name;
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strcpy (message.request.one, file_name);
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message.request.type_two = mach_msg_type_int32;
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message.request.two = flags;
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message.request.type_three = mach_msg_type_int32;
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message.request.three = mode;
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kern_return_t result = __syscall_get (start_dir, SYS__dir_lookup,
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&message.request.header,
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sizeof (message.reply));
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if (message.reply.one != KERN_SUCCESS)
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return message.reply.one;
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*port = message.reply.four;
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return result;
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}
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