reactos/posix/lib/psxdll/fcntl/fcntl.c

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/* $Id: fcntl.c,v 1.7 2002/10/29 04:45:31 rex Exp $
*/
/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS POSIX+ Subsystem
* FILE: subsys/psx/lib/psxdll/fcntl/fcntl.c
* PURPOSE: File control
* PROGRAMMER: KJK::Hyperion <noog@libero.it>
* UPDATE HISTORY:
* 13/02/2002: Created
* 15/02/2002: Implemented fcntl() (KJK::Hyperion)
*/
#include <ddk/ntddk.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdarg.h>
#include <psx/errno.h>
#include <psx/stdlib.h>
#include <psx/fdtable.h>
#include <psx/pdata.h>
#include <psx/debug.h>
int fcntl(int fildes, int cmd, ...)
{
__fdtable_t *pftFdTable;
__fildes_t *pfdDescriptor;
NTSTATUS nErrCode;
int nRetVal;
int nThirdArg;
void *pThirdArg;
va_list vlArgs;
/* lock the environment */
__PdxAcquirePdataLock();
INFO("environment locked");
/* get the file descriptors table */
pftFdTable = &__PdxGetProcessData()->FdTable;
INFO("file descriptors table at 0x%08X", pftFdTable);
/* fildes is an invalid descriptor, or it's a closed or uninitialized
descriptor and the requested operation is not the creation of a new
descriptor */
if
(
fildes < 0 ||
fildes >= OPEN_MAX ||
(
(cmd != F_NEWFD) &&
(
__fdtable_entry_isavail(pftFdTable, fildes) == 0 ||
__fdtable_entry_get(pftFdTable, fildes) == 0
)
)
)
{
INFO("invalid file descriptor");
errno = EBADF;
__PdxReleasePdataLock();
return (-1);
}
/* get the file descriptor referenced by fildes */
pfdDescriptor = __fdtable_entry_get(pftFdTable, fildes);
INFO("file descriptor %d at 0x%08X", fildes, pftFdTable);
/* get third argument as integer */
va_start(vlArgs, cmd);
nThirdArg = va_arg(vlArgs, int);
va_end(vlArgs);
/* get third argument as pointer */
va_start(vlArgs, cmd);
pThirdArg = va_arg(vlArgs, void *);
va_end(vlArgs);
/* initialize return value */
nRetVal = -1;
switch(cmd)
{
case F_DUPFD:
{
int nDupFileNo;
__fildes_t *pfdDupDescriptor;
INFO("requested operation: F_DUPFD");
/* allocate the duplicated descriptor */
nDupFileNo = __fdtable_entry_add(pftFdTable, nThirdArg, 0, &pfdDupDescriptor);
if(nDupFileNo)
{
ERR("__fdtable_entry_add() failed, errno %d", errno);
break;
}
/* copy the open flags */
pfdDupDescriptor->OpenFlags = pfdDescriptor->OpenFlags;
/* clear the FD_CLOEXEC flag */
pfdDupDescriptor->FdFlags = pfdDescriptor->FdFlags & ~FD_CLOEXEC;
/* duplicate the extra data */
if(pfdDescriptor->ExtraDataSize != 0 && pfdDescriptor->ExtraData != 0)
{
/* allocate space for the duplicated extra data */
pfdDupDescriptor->ExtraDataSize = pfdDescriptor->ExtraDataSize;
pfdDupDescriptor->ExtraData = __malloc(pfdDupDescriptor->ExtraDataSize);
/* failure */
if(pfdDupDescriptor->ExtraData == 0)
{
errno = ENOMEM;
break;
}
/* copy the extra data */
memcpy(pfdDupDescriptor->ExtraData, pfdDescriptor->ExtraData, pfdDupDescriptor->ExtraDataSize);
INFO
(
"copied %u bytes from 0x%08X into 0x%08X",
pfdDupDescriptor->ExtraDataSize,
pfdDescriptor->ExtraData,
pfdDupDescriptor->ExtraData
);
}
/* duplicate the handle */
nErrCode = NtDuplicateObject
(
NtCurrentProcess(),
pfdDescriptor->FileHandle,
NtCurrentProcess(),
&pfdDupDescriptor->FileHandle,
0,
0,
DUPLICATE_SAME_ACCESS /* | DUPLICATE_SAME_ATTRIBUTES */
);
/* failure */
if(!NT_SUCCESS(nErrCode))
{
__free(pfdDupDescriptor->ExtraData);
errno = __status_to_errno(nErrCode);
break;
}
INFO
(
"duplicated handle 0x%08X into handle 0x%08X",
pfdDescriptor->FileHandle,
pfdDupDescriptor->FileHandle
);
/* return the duplicated file number */
nRetVal = nDupFileNo;
break;
}
case F_GETFD:
{
INFO("requested operation: F_GETFD");
nRetVal = pfdDescriptor->FdFlags;
break;
}
case F_SETFD:
{
INFO("requested operation: F_SETFD");
pfdDescriptor->FdFlags = nThirdArg;
nRetVal = 0;
break;
}
case F_GETFL:
{
INFO("requested operation: F_GETFL");
nRetVal = pfdDescriptor->OpenFlags;
break;
}
case F_SETFL:
{
INFO("requested operation: F_SETFL");
pfdDescriptor->OpenFlags = nThirdArg;
nRetVal = 0;
break;
}
case F_GETLK:
{
INFO("requested operation: F_GETLK");
errno = EINVAL;
break;
}
case F_SETLK:
{
INFO("requested operation: F_SETLK");
errno = EINVAL;
break;
}
case F_SETLKW:
{
INFO("requested operation: F_SETLKW");
errno = EINVAL;
break;
}
case F_NEWFD:
{
INFO("requested operation: F_NEWFD");
/* allocate a new descriptor */
nRetVal = __fdtable_entry_add(pftFdTable, fildes, (__fildes_t *)pThirdArg, 0);
break;
}
case F_DELFD:
{
INFO("requested operation: F_DELFD");
/* invalid return pointer */
if(pThirdArg == 0)
{
errno = EINVAL;
break;
}
memcpy((__fildes_t *)pThirdArg, pfdDescriptor, sizeof(*pfdDescriptor));
/* remove file descriptor */
nRetVal = __fdtable_entry_remove(pftFdTable, fildes);
}
case F_GETALL:
{
INFO("requested operation: F_GETALL");
/* invalid return pointer */
if(pThirdArg == 0)
{
errno = EINVAL;
break;
}
/* return a copy of the file descriptor */
memcpy((__fildes_t *)pThirdArg, pfdDescriptor, sizeof(*pfdDescriptor));
nRetVal = 0;
break;
}
case F_SETALL:
{
INFO("requested operation: F_SETALL");
/* invalid file descriptor to copy attributes from */
if(pThirdArg == 0)
{
errno = EINVAL;
break;
}
/* copy the attributes of file descriptor from the provided descriptor */
memcpy(pfdDescriptor, pThirdArg, sizeof(*pfdDescriptor));
nRetVal = 0;
break;
}
case F_GETXP:
{
INFO("requested operation: F_GETXP");
/* invalid return pointer */
if(pThirdArg == 0)
{
errno = EINVAL;
break;
}
/* return a pointer to the extra data associated to the descriptor */
*((void **)pThirdArg) = pfdDescriptor->ExtraData;
nRetVal = 0;
break;
}
case F_SETXP:
{
INFO("requested operation: F_SETXP");
/* set the pointer to the extra data associated */
pfdDescriptor->ExtraData = pThirdArg;
nRetVal = 0;
break;
}
case F_GETXS:
{
INFO("requested operation: F_GETXS");
nRetVal = pfdDescriptor->ExtraDataSize;
break;
}
case F_SETXS:
{
INFO("requested operation: F_SETXS");
pfdDescriptor->ExtraDataSize = nThirdArg;
nRetVal = 0;
break;
}
case F_GETFH:
{
INFO("requested operation: F_GETFH");
/* invalid return pointer */
if(pThirdArg == 0)
{
errno = EINVAL;
break;
}
/* return the handle associated to the descriptor */
*((void **)pThirdArg) = pfdDescriptor->FileHandle;
nRetVal = 0;
break;
}
case F_SETFH:
{
INFO("requested operation: F_SETFH");
pfdDescriptor->FileHandle = pThirdArg;
nRetVal = 0;
break;
}
default:
INFO("invalid operation requested");
errno = EINVAL;
}
/* unlock the environment */
__PdxReleasePdataLock();
INFO("environment unlocked");
return (nRetVal);
}
/* EOF */