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