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