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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*++
Module Name:
disk.c
Abstract:
Implementation of the disk information functions.
Revision History:
--*/
#include "pal/palinternal.h"
#include "pal/dbgmsg.h"
#include "pal/file.h"
#include "pal/stackstring.hpp"
#include <sys/param.h>
#include <sys/mount.h>
#include <errno.h>
#if HAVE_STATVFS
#include <sys/types.h>
#include <sys/statvfs.h>
#define statfs statvfs
#if STATVFS64_PROTOTYPE_BROKEN
typedef statvfs_t pal_statfs;
#else // STATVFS64_PROTOTYPE_BROKEN
typedef struct statvfs pal_statfs;
#endif // STATVFS64_PROTOTYPE_BROKEN
#else // HAVE_STATVFS
typedef struct statfs pal_statfs;
#endif // HAVE_STATVFS
SET_DEFAULT_DEBUG_CHANNEL(FILE);
/*++
Function:
GetDiskFreeSpaceW
See MSDN doc.
--*/
PALIMPORT
BOOL
PALAPI
GetDiskFreeSpaceW(
LPCWSTR lpDirectoryName,
LPDWORD lpSectorsPerCluster,
LPDWORD lpBytesPerSector,
LPDWORD lpNumberOfFreeClusters, /* Caller will ignore output value */
LPDWORD lpTotalNumberOfClusters) /* Caller will ignore output value */
{
BOOL bRetVal = FALSE;
pal_statfs fsInfoBuffer;
INT statfsRetVal = 0;
DWORD dwLastError = NO_ERROR;
PathCharString dirNameBufferPathString;
size_t length;
char * dirNameBuffer;
int size;
PERF_ENTRY(GetDiskFreeSpaceW);
ENTRY( "GetDiskFreeSpaceW( lpDirectoryName=%p (%S), lpSectorsPerCluster=%p,"
"lpBytesPerSector=%p, lpNumberOfFreeClusters=%p, "
"lpTotalNumberOfClusters=%p )\n", lpDirectoryName ? lpDirectoryName :
W16_NULLSTRING, lpDirectoryName ? lpDirectoryName :
W16_NULLSTRING, lpSectorsPerCluster, lpBytesPerSector,
lpNumberOfFreeClusters, lpTotalNumberOfClusters );
/* Sanity checks. */
if ( !lpSectorsPerCluster )
{
ERROR( "lpSectorsPerCluster cannot be NULL!\n" );
dwLastError = ERROR_INVALID_PARAMETER;
goto exit;
}
if ( !lpBytesPerSector )
{
ERROR( "lpBytesPerSector cannot be NULL!\n" );
dwLastError = ERROR_INVALID_PARAMETER;
goto exit;
}
if ( lpNumberOfFreeClusters || lpTotalNumberOfClusters )
{
TRACE("GetDiskFreeSpaceW is ignoring lpNumberOfFreeClusters"
" and lpTotalNumberOfClusters\n" );
}
if ( lpDirectoryName && PAL_wcslen( lpDirectoryName ) == 0 )
{
ERROR( "lpDirectoryName is empty.\n" );
dwLastError = ERROR_INVALID_PARAMETER;
goto exit;
}
/* Fusion uses this API to round file sizes up to their actual size
on-disk based on the BytesPerSector * SectorsPerCluster.
The intent is to avoid computing the sum of all file sizes in the
cache just in bytes and not account for the cluster-sized slop, when
determining if the cache is too large or not. */
if ( lpDirectoryName )
{
length = (PAL_wcslen(lpDirectoryName)+1) * 3;
dirNameBuffer = dirNameBufferPathString.OpenStringBuffer(length);
if (NULL == dirNameBuffer)
{
dwLastError = ERROR_NOT_ENOUGH_MEMORY;
goto exit;
}
size = WideCharToMultiByte( CP_ACP, 0, lpDirectoryName, -1,
dirNameBuffer,length, 0, 0 );
dirNameBufferPathString.CloseBuffer(size);
if ( size != 0 )
{
FILEDosToUnixPathA( dirNameBuffer );
statfsRetVal = statfs( dirNameBuffer, &fsInfoBuffer );
}
else
{
ASSERT( "Unable to convert the lpDirectoryName to multibyte.\n" );
dwLastError = ERROR_INTERNAL_ERROR;
goto exit;
}
}
else
{
statfsRetVal = statfs( "/", &fsInfoBuffer );
}
if ( statfsRetVal == 0 )
{
*lpBytesPerSector = fsInfoBuffer.f_bsize;
*lpSectorsPerCluster = 1;
bRetVal = TRUE;
}
else
{
if ( errno == ENOTDIR || errno == ENOENT )
{
FILEGetProperNotFoundError( dirNameBuffer, &dwLastError );
goto exit;
}
dwLastError = FILEGetLastErrorFromErrno();
if ( ERROR_INTERNAL_ERROR == dwLastError )
{
ASSERT("statfs() not expected to fail with errno:%d (%s)\n",
errno, strerror(errno));
}
else
{
TRACE("statfs() failed, errno:%d (%s)\n", errno, strerror(errno));
}
}
exit:
if ( NO_ERROR != dwLastError )
{
SetLastError( dwLastError );
}
LOGEXIT( "GetDiskFreeSpace returning %s.\n", bRetVal == TRUE ? "TRUE" : "FALSE" );
PERF_EXIT(GetDiskFreeSpaceW);
return bRetVal;
}
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