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reactos/base/shell/cmd/del.c
Art Yerkes c501d8112c Create a branch for network fixes. 
svn path=/branches/aicom-network-fixes/; revision=34994
2008-08-01 11:32:26 +00:00

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/*
* DEL.C - del internal command.
*
*
* History:
*
* 06/29/98 (Rob Lake rlake@cs.mun.ca)
* rewrote del to support wildcards
* added my name to the contributors
*
* 07/13/98 (Rob Lake)
* fixed bug that caused del not to delete file with out
* attribute. moved set, del, ren, and ver to there own files
*
* 27-Jul-1998 (John P Price <linux-guru@gcfl.net>)
* added config.h include
*
* 09-Dec-1998 (Eric Kohl)
* Fixed command line parsing bugs.
*
* 21-Jan-1999 (Eric Kohl)
* Started major rewrite using a new structure.
*
* 03-Feb-1999 (Eric Kohl)
* First working version.
*
* 30-Mar-1999 (Eric Kohl)
* Added quiet ("/Q"), wipe ("/W") and zap ("/Z") option.
*
* 06-Nov-1999 (Eric Kohl)
* Little fix to keep DEL quiet inside batch files.
*
* 28-Jan-2004 (Michael Fritscher <michael@fritscher.net>)
* Added prompt ("/P"), yes ("/Y") and wipe("/W") option.
*
* 22-Jun-2005 (Brandon Turner <turnerb7@msu.edu>)
* Added exclusive deletion "del * -abc.txt -text*.txt"
*
* 22-Jun-2005 (Brandon Turner <turnerb7@msu.edu>)
* Implemented /A example "del /A:H /A:-R *.exe -ping.exe"
*
* 07-Aug-2005
* Removed the exclusive deletion (see two comments above) because '-' is a valid file name character.
* Optimized the recursive deletion in directories.
* Preload some nice strings.
*/
#include <precomp.h>
#ifdef INCLUDE_CMD_DEL
enum
{
DEL_ATTRIBUTES = 0x001, /* /A */
DEL_NOTHING = 0x004, /* /N */
DEL_PROMPT = 0x008, /* /P */
DEL_QUIET = 0x010, /* /Q */
DEL_SUBDIR = 0x020, /* /S */
DEL_TOTAL = 0x040, /* /T */
DEL_WIPE = 0x080, /* /W */
DEL_EMPTYDIR = 0x100, /* /X : not implemented */
DEL_YES = 0x200, /* /Y */
DEL_FORCE = 0x800 /* /F */
};
enum
{
ATTR_ARCHIVE = 0x001, /* /A:A */
ATTR_HIDDEN = 0x002, /* /A:H */
ATTR_SYSTEM = 0x004, /* /A:S */
ATTR_READ_ONLY = 0x008, /* /A:R */
ATTR_N_ARCHIVE = 0x010, /* /A:-A */
ATTR_N_HIDDEN = 0x020, /* /A:-H */
ATTR_N_SYSTEM = 0x040, /* /A:-S */
ATTR_N_READ_ONLY = 0x080 /* /A:-R */
};
static TCHAR szDeleteWipe[RC_STRING_MAX_SIZE];
static TCHAR CMDPath[MAX_PATH];
static BOOLEAN StringsLoaded = FALSE;
static VOID LoadStrings(VOID)
{
LoadString( CMD_ModuleHandle, STRING_DELETE_WIPE, szDeleteWipe, RC_STRING_MAX_SIZE);
GetModuleFileName(NULL, CMDPath, MAX_PATH);
StringsLoaded = TRUE;
}
static BOOL
RemoveFile (LPTSTR lpFileName, DWORD dwFlags, WIN32_FIND_DATA* f)
{
/*This function is called by CommandDelete and
does the actual process of deleting the single
file*/
if(CheckCtrlBreak(BREAK_INPUT))
return 1;
/*check to see if it is read only and if this is done based on /A
if it is done by file name, access is denied. However, if it is done
using the /A switch you must un-read only the file and allow it to be
deleted*/
if((dwFlags & DEL_ATTRIBUTES) || (dwFlags & DEL_FORCE))
{
if(f->dwFileAttributes & FILE_ATTRIBUTE_READONLY)
{
/*setting file to normal, not saving old attrs first
because the file is going to be deleted anyways
so the only thing that matters is that it isnt
read only.*/
SetFileAttributes(lpFileName,FILE_ATTRIBUTE_NORMAL);
}
}
if (dwFlags & DEL_WIPE)
{
HANDLE file;
DWORD temp;
#define BufferSize 65536
BYTE buffer[BufferSize];
LONGLONG i;
LARGE_INTEGER FileSize;
FileSize.u.HighPart = f->nFileSizeHigh;
FileSize.u.LowPart = f->nFileSizeLow;
for(i = 0; i < BufferSize; i++)
{
buffer[i]=rand() % 256;
}
file = CreateFile (lpFileName, GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_FLAG_WRITE_THROUGH, NULL);
if (file != INVALID_HANDLE_VALUE)
{
for(i = 0; i < (FileSize.QuadPart - BufferSize); i += BufferSize)
{
WriteFile (file, buffer, BufferSize, &temp, NULL);
ConOutPrintf (_T("%I64d%% %s\r"),(i * (LONGLONG)100)/FileSize.QuadPart,szDeleteWipe);
}
WriteFile (file, buffer, (DWORD)(FileSize.QuadPart - i), &temp, NULL);
ConOutPrintf (_T("100%% %s\n"),szDeleteWipe);
CloseHandle (file);
}
}
return DeleteFile (lpFileName);
}
static DWORD
DeleteFiles(LPTSTR FileName, DWORD* dwFlags, DWORD dwAttrFlags)
{
TCHAR szFullPath[MAX_PATH];
TCHAR szFileName[MAX_PATH];
LPTSTR pFilePart;
HANDLE hFile;
WIN32_FIND_DATA f;
BOOL bExclusion;
INT res;
DWORD dwFiles = 0;
_tcscpy(szFileName, FileName);
if(_tcschr (szFileName, _T('*')) == NULL &&
IsExistingDirectory (szFileName))
{
/* If it doesnt have a \ at the end already then on needs to be added */
if(szFileName[_tcslen(szFileName) - 1] != _T('\\'))
_tcscat (szFileName, _T("\\"));
/* Add a wildcard after the \ */
_tcscat (szFileName, _T("*"));
}
if(!_tcscmp (szFileName, _T("*")) ||
!_tcscmp (szFileName, _T("*.*")) ||
(szFileName[_tcslen(szFileName) - 2] == _T('\\') && szFileName[_tcslen(szFileName) - 1] == _T('*')))
{
/* well, the user wants to delete everything but if they didnt yes DEL_YES, DEL_QUIET, or DEL_PROMPT
then we are going to want to make sure that in fact they want to do that. */
if (!((*dwFlags & DEL_YES) || (*dwFlags & DEL_QUIET) || (*dwFlags & DEL_PROMPT)))
{
res = FilePromptYNA (STRING_DEL_HELP2);
if ((res == PROMPT_NO) || (res == PROMPT_BREAK))
return 0x80000000;
if(res == PROMPT_ALL)
*dwFlags |= DEL_YES;
}
}
GetFullPathName (szFileName,
MAX_PATH,
szFullPath,
&pFilePart);
hFile = FindFirstFile(szFullPath, &f);
if (hFile != INVALID_HANDLE_VALUE)
{
do
{
bExclusion = FALSE;
/*if it is going to be excluded by - no need to check attrs*/
if(*dwFlags & DEL_ATTRIBUTES && !bExclusion)
{
/*save if file attr check if user doesnt care about that attr anyways*/
if(dwAttrFlags & ATTR_ARCHIVE && !(f.dwFileAttributes & FILE_ATTRIBUTE_ARCHIVE))
bExclusion = TRUE;
if(dwAttrFlags & ATTR_HIDDEN && !(f.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN))
bExclusion = TRUE;
if(dwAttrFlags & ATTR_SYSTEM && !(f.dwFileAttributes & FILE_ATTRIBUTE_SYSTEM))
bExclusion = TRUE;
if(dwAttrFlags & ATTR_READ_ONLY && !(f.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
bExclusion = TRUE;
if(dwAttrFlags & ATTR_N_ARCHIVE && (f.dwFileAttributes & FILE_ATTRIBUTE_ARCHIVE))
bExclusion = TRUE;
if(dwAttrFlags & ATTR_N_HIDDEN && (f.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN))
bExclusion = TRUE;
if(dwAttrFlags & ATTR_N_SYSTEM && (f.dwFileAttributes & FILE_ATTRIBUTE_SYSTEM))
bExclusion = TRUE;
if(dwAttrFlags & ATTR_N_READ_ONLY && (f.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
bExclusion = TRUE;
}
if(bExclusion)
continue;
/* ignore directories */
if (f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
continue;
_tcscpy (pFilePart, f.cFileName);
/* We cant delete ourselves */
if(!_tcscmp (CMDPath,szFullPath))
continue;
TRACE("Full filename: %s\n", debugstr_aw(szFullPath));
/* ask for deleting */
if (*dwFlags & DEL_PROMPT)
{
ConErrResPrintf(STRING_DEL_ERROR5, szFullPath);
res = FilePromptYN (STRING_DEL_ERROR6);
if ((res == PROMPT_NO) || (res == PROMPT_BREAK))
{
nErrorLevel = 0;
continue;
}
}
/*user cant ask it to be quiet and tell you what it did*/
if (!(*dwFlags & DEL_QUIET) && !(*dwFlags & DEL_TOTAL))
{
ConErrResPrintf(STRING_DEL_ERROR7, szFullPath);
}
/* delete the file */
if(*dwFlags & DEL_NOTHING)
continue;
if(RemoveFile (szFullPath, *dwFlags, &f))
dwFiles++;
else
{
ErrorMessage (GetLastError(), _T(""));
// FindClose(hFile);
// return -1;
}
}
while (FindNextFile (hFile, &f));
FindClose (hFile);
}
return dwFiles;
}
static DWORD
ProcessDirectory(LPTSTR FileName, DWORD* dwFlags, DWORD dwAttrFlags)
{
TCHAR szFullPath[MAX_PATH];
LPTSTR pFilePart;
LPTSTR pSearchPart;
HANDLE hFile;
WIN32_FIND_DATA f;
DWORD dwFiles = 0;
GetFullPathName (FileName,
MAX_PATH,
szFullPath,
&pFilePart);
dwFiles = DeleteFiles(szFullPath, dwFlags, dwAttrFlags);
if (dwFiles & 0x80000000)
return dwFiles;
if (*dwFlags & DEL_SUBDIR)
{
/* Get just the file name */
pSearchPart = _tcsrchr(FileName,_T('\\'));
if(pSearchPart != NULL)
pSearchPart++;
else
pSearchPart = FileName;
/* Get the full path to the file */
GetFullPathName (FileName,MAX_PATH,szFullPath,NULL);
/* strip the filename off of it */
pFilePart = _tcsrchr(szFullPath, _T('\\'));
if (pFilePart == NULL)
{
pFilePart = szFullPath;
}
else
{
pFilePart++;
}
_tcscpy(pFilePart, _T("*"));
hFile = FindFirstFile(szFullPath, &f);
if (hFile != INVALID_HANDLE_VALUE)
{
do
{
if (!(f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ||
!_tcscmp(f.cFileName, _T(".")) ||
!_tcscmp(f.cFileName, _T("..")))
continue;
_tcscpy(pFilePart, f.cFileName);
_tcscat(pFilePart, _T("\\"));
_tcscat(pFilePart, pSearchPart);
dwFiles +=ProcessDirectory(szFullPath, dwFlags, dwAttrFlags);
if (dwFiles & 0x80000000)
{
break;
}
}
while (FindNextFile (hFile, &f));
FindClose (hFile);
}
}
return dwFiles;
}
INT CommandDelete (LPTSTR cmd, LPTSTR param)
{
/*cmd is the command that was given, in this case it will always be "del" or "delete"
param is whatever is given after the command*/
LPTSTR *arg = NULL;
INT args;
INT i;
INT nEvalArgs = 0; /* nunber of evaluated arguments */
DWORD dwFlags = 0;
DWORD dwAttrFlags = 0;
DWORD dwFiles = 0;
LONG ch;
TCHAR szOrginalArg[MAX_PATH];
/*checks the first two chars of param to see if it is /?
this however allows the following command to not show help
"del frog.txt /?" */
if (!StringsLoaded)
{
LoadStrings();
}
if (!_tcsncmp (param, _T("/?"), 2))
{
ConOutResPaging(TRUE,STRING_DEL_HELP1);
return 0;
}
nErrorLevel = 0;
arg = split (param, &args, FALSE);
if (args == 0)
{
/* only command given */
error_req_param_missing ();
freep (arg);
return 1;
}
/* check for options anywhere in command line */
for (i = 0; i < args; i++)
{
if (*arg[i] == _T('/'))
{
/*found a command, but check to make sure it has something after it*/
if (_tcslen (arg[i]) >= 2)
{
ch = _totupper (arg[i][1]);
if (ch == _T('N'))
{
dwFlags |= DEL_NOTHING;
}
else if (ch == _T('P'))
{
dwFlags |= DEL_PROMPT;
}
else if (ch == _T('Q'))
{
dwFlags |= DEL_QUIET;
}
else if (ch == _T('F'))
{
dwFlags |= DEL_FORCE;
}
else if (ch == _T('S'))
{
dwFlags |= DEL_SUBDIR;
}
else if (ch == _T('T'))
{
dwFlags |= DEL_TOTAL;
}
else if (ch == _T('W'))
{
dwFlags |= DEL_WIPE;
}
else if (ch == _T('Y'))
{
dwFlags |= DEL_YES;
}
else if (ch == _T('A'))
{
dwFlags |= DEL_ATTRIBUTES;
/*the proper syntax for /A has a min of 4 chars
i.e. /A:R or /A:-H */
if (_tcslen (arg[i]) < 4)
{
error_invalid_parameter_format(arg[i]);
return 0;
}
ch = _totupper (arg[i][3]);
if (_tcslen (arg[i]) == 4)
{
if(ch == _T('A'))
{
dwAttrFlags |= ATTR_ARCHIVE;
}
if(ch == _T('H'))
{
dwAttrFlags |= ATTR_HIDDEN;
}
if(ch == _T('S'))
{
dwAttrFlags |= ATTR_SYSTEM;
}
if(ch == _T('R'))
{
dwAttrFlags |= ATTR_READ_ONLY;
}
}
if (_tcslen (arg[i]) == 5)
{
if(ch == _T('-'))
{
ch = _totupper (arg[i][4]);
if(ch == _T('A'))
{
dwAttrFlags |= ATTR_N_ARCHIVE;
}
if(ch == _T('H'))
{
dwAttrFlags |= ATTR_N_HIDDEN;
}
if(ch == _T('S'))
{
dwAttrFlags |= ATTR_N_SYSTEM;
}
if(ch == _T('R'))
{
dwAttrFlags |= ATTR_N_READ_ONLY;
}
}
}
}
}
nEvalArgs++;
}
}
/* there are only options on the command line --> error!!!
there is the same number of args as there is flags, so none of the args were filenames*/
if (args == nEvalArgs)
{
error_req_param_missing ();
freep (arg);
return 1;
}
/* keep quiet within batch files */
if (bc != NULL)
dwFlags |= DEL_QUIET;
/* check for filenames anywhere in command line */
for (i = 0; i < args && !(dwFiles & 0x80000000); i++)
{
/*this checks to see if it isnt a flag, if it isnt, we assume it is a file name*/
if((*arg[i] == _T('/')) || (*arg[i] == _T('-')))
continue;
/* We want to make a copies of the argument */
if(_tcslen(arg[i]) == 2 && arg[i][1] == _T(':'))
{
/* Check for C: D: ... */
GetRootPath(arg[i],szOrginalArg,MAX_PATH);
}
else
{
_tcscpy(szOrginalArg,arg[i]);
}
dwFiles += ProcessDirectory(szOrginalArg, &dwFlags, dwAttrFlags);
}
freep (arg);
/*Based on MS cmd, we only tell what files are being deleted when /S is used */
if (dwFlags & DEL_TOTAL)
{
dwFiles &= 0x7fffffff;
if (dwFiles < 2)
{
ConOutResPrintf(STRING_DEL_HELP3, dwFiles);
}
else
{
ConOutResPrintf(STRING_DEL_HELP4, dwFiles);
}
}
return 0;
}
#endif
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