77 lines
2.7 KiB
C
77 lines
2.7 KiB
C
/***********************************************************************/
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/* */
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/* OCaml */
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/* */
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/* Xavier Leroy and Pascal Cuoq, projet Cristal, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* en Automatique. All rights reserved. This file is distributed */
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/* under the terms of the GNU Library General Public License, with */
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/* the special exception on linking described in file ../../LICENSE. */
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/* */
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/***********************************************************************/
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#include <mlvalues.h>
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#include <alloc.h>
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#include "unixsupport.h"
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#include <fcntl.h>
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static int open_access_flags[14] = {
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GENERIC_READ, GENERIC_WRITE, GENERIC_READ|GENERIC_WRITE,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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static int open_create_flags[14] = {
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0, 0, 0, 0, 0, O_CREAT, O_TRUNC, O_EXCL, 0, 0, 0, 0, 0, 0
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};
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static int open_share_flags[14] = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, FILE_SHARE_DELETE, 0
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};
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static int open_cloexec_flags[14] = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
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};
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CAMLprim value unix_open(value path, value flags, value perm)
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{
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int fileaccess, createflags, fileattrib, filecreate, sharemode, cloexec;
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SECURITY_ATTRIBUTES attr;
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HANDLE h;
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fileaccess = convert_flag_list(flags, open_access_flags);
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sharemode = FILE_SHARE_READ | FILE_SHARE_WRITE
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| convert_flag_list(flags, open_share_flags);
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createflags = convert_flag_list(flags, open_create_flags);
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if ((createflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
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filecreate = CREATE_NEW;
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else if ((createflags & (O_CREAT | O_TRUNC)) == (O_CREAT | O_TRUNC))
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filecreate = CREATE_ALWAYS;
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else if (createflags & O_TRUNC)
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filecreate = TRUNCATE_EXISTING;
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else if (createflags & O_CREAT)
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filecreate = OPEN_ALWAYS;
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else
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filecreate = OPEN_EXISTING;
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if ((createflags & O_CREAT) && (Int_val(perm) & 0200) == 0)
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fileattrib = FILE_ATTRIBUTE_READONLY;
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else
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fileattrib = FILE_ATTRIBUTE_NORMAL;
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cloexec = convert_flag_list(flags, open_cloexec_flags);
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attr.nLength = sizeof(attr);
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attr.lpSecurityDescriptor = NULL;
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attr.bInheritHandle = cloexec ? FALSE : TRUE;
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h = CreateFile(String_val(path), fileaccess,
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sharemode, &attr,
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filecreate, fileattrib, NULL);
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if (h == INVALID_HANDLE_VALUE) {
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win32_maperr(GetLastError());
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uerror("open", path);
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}
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return win_alloc_handle(h);
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}
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