unsigned ReqFile_open( void )
{
HANDLE h;
file_open_req *acc;
file_open_ret *ret;
void *buff;
unsigned mode;
static unsigned const mapAcc[] = { 0, 1, 2 };
acc = GetInPtr( 0 );
buff = GetInPtr( sizeof( *acc ) );
ret = GetOutPtr( 0 );
/*
* GetMagicalFileHandle checks if a file name is of a special syntax.
* We generate magical file names for all DLL's when they load,
* since NT only gives a file handle to the DLL, not a file name.
* We fake up a name, and remember the handle. When the debugger
* asks to open up a fake name, we reuse the handle
*/
h = GetMagicalFileHandle( buff );
ret->err = 0;
if( h == NULL ) {
/*
* these __GetNT... routines are in the C library. they turn
* DOS style access and share bits into NT style ones
*/
extern void __GetNTAccessAttr( int rwmode, LPDWORD desired_access,
LPDWORD attr );
extern void __GetNTShareAttr( int share, LPDWORD share_mode );
DWORD share_mode;
DWORD desired_access;
DWORD attr;
DWORD create_disp;
mode = mapAcc[ ( 0x3 & acc->mode ) - 1];
__GetNTAccessAttr( mode & 0x7, &desired_access, &attr );
__GetNTShareAttr( mode & 0x70, &share_mode );
if( acc->mode & TF_CREATE ) {
create_disp = CREATE_ALWAYS;
} else {
create_disp = OPEN_EXISTING;
}
h = CreateFile( ( LPTSTR ) buff, desired_access, share_mode, 0,
create_disp, FILE_ATTRIBUTE_NORMAL, NULL );
if( h == ( HANDLE ) - 1 ) {
ret->err = GetLastError();
h = 0;
}
}
ret->handle = ( DWORD ) h;
return( sizeof( *ret ) );
}
_WCRTLINK unsigned _dos_open( const char *name, unsigned mode, int *posix_handle )
{
HANDLE handle;
unsigned rwmode;
DWORD share_mode;
DWORD desired_access, os_attr;
unsigned iomode_flags;
int hid;
// First try to get the required slot.
// No point in creating a file only to not use it. JBS 99/11/01
hid = __allocPOSIXHandle( DUMMY_HANDLE );
if( hid == -1 ) {
return( __set_errno_dos_reterr( ERROR_NOT_ENOUGH_MEMORY ) );
}
rwmode = mode & OPENMODE_ACCESS_MASK;
__GetNTAccessAttr( rwmode, &desired_access, &os_attr );
__GetNTShareAttr( mode & (OPENMODE_SHARE_MASK|OPENMODE_ACCESS_MASK),
&share_mode );
handle = CreateFile( (LPTSTR) name, desired_access, share_mode, 0,
OPEN_EXISTING, os_attr, NULL );
if( handle == (HANDLE)-1 ) {
__freePOSIXHandle( hid );
return( __set_errno_nt_reterr() );
}
// Now use the slot we got.
__setOSHandle( hid, handle ); // JBS 99/11/01
*posix_handle = hid;
iomode_flags = 0;
if( rwmode == O_RDWR )
iomode_flags = _READ | _WRITE;
if( rwmode == O_RDONLY )
iomode_flags = _READ;
if( rwmode == O_WRONLY )
iomode_flags = _WRITE;
__SetIOMode( hid, iomode_flags );
return( 0 );
}
