HandleError HandleSystem::CloneHandle(Handle_t handle, Handle_t *newhandle, IdentityToken_t *newOwner, const HandleSecurity *pSecurity)
{
HandleError err;
QHandle *pHandle;
unsigned int index;
IdentityToken_t *ident = pSecurity ? pSecurity->pIdentity : NULL;
if ((err=GetHandle(handle, ident, &pHandle, &index)) != HandleError_None)
{
return err;
}
/* Identities cannot be cloned */
if (pHandle->set == HandleSet_Identity)
{
return HandleError_Identity;
}
/* Check if the handle can be cloned */
if (!CheckAccess(pHandle, HandleAccess_Clone, pSecurity))
{
return HandleError_Access;
}
/* Make sure we're not cloning a clone */
if (pHandle->clone)
{
QHandle *pParent = &m_Handles[pHandle->clone];
return CloneHandle(pParent, pHandle->clone, newhandle, newOwner);
}
return CloneHandle(pHandle, index, newhandle, newOwner);
}
Handle_t HandleSystem::FastCloneHandle(QHandle *pHandle, unsigned int index)
{
if (pHandle->clone)
return FastCloneHandle(&m_Handles[pHandle->clone], pHandle->clone);
Handle_t hndl;
if (CloneHandle(pHandle, index, &hndl, g_pCoreIdent) != HandleError_None)
return BAD_HANDLE;
return hndl;
}
/* The following code is 8086 dependant */
VOID new_psp(psp FAR * p, int psize)
{
REG COUNT i;
psp FAR *q = MK_FP(cu_psp, 0);
/* Clear out new psp first */
fmemset(p, 0, sizeof(psp));
/* initialize all entries and exits */
/* CP/M-like exit point */
p->ps_exit = 0x20cd;
/* CP/M-like entry point - jump to special entry */
p->ps_farcall = 0xea;
p->ps_reentry = (VOID(FAR *) ())cpm_entry;
/* unix style call - 0xcd 0x21 0xcb (int 21, retf) */
p->ps_unix[0] = 0xcd;
p->ps_unix[1] = 0x21;
p->ps_unix[2] = 0xcb;
/* Now for parent-child relationships */
/* parent psp segment */
p->ps_parent = cu_psp;
/* previous psp pointer */
p->ps_prevpsp = q;
/* Environment and memory useage parameters */
/* memory size in paragraphs */
p->ps_size = psize;
/* environment paragraph */
p->ps_environ = 0;
/* process dta */
p->ps_dta = (BYTE FAR *) (&p->ps_cmd_count);
/* terminate address */
p->ps_isv22 = (VOID(INRPT FAR *) (void))getvec(0x22);
/* break address */
p->ps_isv23 = (VOID(INRPT FAR *) (void))getvec(0x23);
/* critical error address */
p->ps_isv24 = (VOID(INRPT FAR *) (void))getvec(0x24);
/* File System parameters */
/* user stack pointer - int 21 */
p->ps_stack = q->ps_stack;
/* file table - 0xff is unused */
for (i = 0; i < 20; i++)
p->ps_files[i] = 0xff;
/* maximum open files */
p->ps_maxfiles = 20;
/* open file table pointer */
p->ps_filetab = p->ps_files;
/* clone the file table */
if (p!=q)
{
REG COUNT i;
for (i = 0; i < 20; i++)
{
if (q->ps_filetab[i] != 0xff && CloneHandle(i) >= 0)
p->ps_filetab[i] = q->ps_filetab[i];
else
p->ps_filetab[i] = 0xff;
}
}
/* first command line argument */
p->ps_fcb1.fcb_drive = 0;
/* second command line argument */
p->ps_fcb2.fcb_drive = 0;
/* local command line */
p->ps_cmd_count = 0; /* command tail */
p->ps_cmd[0] = 0; /* command tail */
if (RootPsp == (seg) ~ 0)
RootPsp = FP_SEG(p);
}
