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gecko-dev/xpcom/io/nsFileSpecOS2.cpp
mkaply%us.ibm.com 1aca897d05 #147977 
r=jpierre, sr=blizzard
OS/2 only - int32 math causing incorrect computation of disk space
2002-06-05 04:02:33 +00:00

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/*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Mozilla OS/2 libraries.
*
* The Initial Developer of the Original Code is John Fairhurst,
* <john_fairhurst@iname.com>. Portions created by John Fairhurst are
* Copyright (C) 1998 John Fairhurst. All Rights Reserved.
*
* Contributor(s): Henry Sobotka <sobotka@axess.com>
* 00/01/06: general review and update against Win/Unix versions;
* replaced nsFileSpec::Execute implementation with system() call
* which properly launches OS/2 PM|VIO, WinOS2 and DOS programs
*
* This Original Code has been modified by IBM Corporation.
* Modifications made by IBM described herein are
* Copyright (c) International Business Machines
* Corporation, 2000
*
* Modifications to Mozilla code or documentation
* identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 03/23/2000 IBM Corp. Fixed bug where 2 char or less profile names treated as drive letters.
* 06/20/2000 IBM Corp. Make it more like Windows version.
*/
#define INCL_DOSERRORS
#define INCL_DOS
#define INCL_WINWORKPLACE
#include <os2.h>
#ifdef XP_OS2_VACPP
#include <direct.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <limits.h>
#include <ctype.h>
#include <io.h>
//----------------------------------------------------------------------------------------
void nsFileSpecHelpers::Canonify(nsSimpleCharString& ioPath, PRBool inMakeDirs)
// Canonify, make absolute, and check whether directories exist. This
// takes a (possibly relative) native path and converts it into a
// fully qualified native path.
//----------------------------------------------------------------------------------------
{
if (ioPath.IsEmpty())
return;
NS_ASSERTION(strchr((const char*)ioPath, '/') == 0,
"This smells like a Unix path. Native path expected! "
"Please fix.");
if (inMakeDirs)
{
const int mode = 0700;
nsSimpleCharString unixStylePath = ioPath;
nsFileSpecHelpers::NativeToUnix(unixStylePath);
nsFileSpecHelpers::MakeAllDirectories((const char*)unixStylePath, mode);
}
char buffer[_MAX_PATH];
errno = 0;
*buffer = '\0';
#ifdef XP_OS2
PRBool removedBackslash = PR_FALSE;
PRUint32 lenstr = ioPath.Length();
char &lastchar = ioPath[lenstr -1];
// Strip off any trailing backslash UNLESS it's the backslash that
// comes after "X:". Note also that "\" is valid. Sheesh.
//
if( lastchar == '\\' && (lenstr != 3 || ioPath[1] != ':') && lenstr != 1)
{
lastchar = '\0';
removedBackslash = PR_TRUE;
}
char canonicalPath[CCHMAXPATH] = "";
DosQueryPathInfo( (char*) ioPath,
FIL_QUERYFULLNAME,
canonicalPath,
CCHMAXPATH);
#else
char* canonicalPath = _fullpath(buffer, ioPath, _MAX_PATH);
#endif
if (canonicalPath)
{
NS_ASSERTION( canonicalPath[0] != '\0', "Uh oh...couldn't convert" );
if (canonicalPath[0] == '\0')
return;
#ifdef XP_OS2
// If we removed that backslash, add it back onto the fullpath
if (removedBackslash)
strcat( canonicalPath, "\\");
#endif
}
ioPath = canonicalPath;
} // nsFileSpecHelpers::Canonify
//----------------------------------------------------------------------------------------
void nsFileSpecHelpers::UnixToNative(nsSimpleCharString& ioPath)
// This just does string manipulation. It doesn't check reality, or canonify, or
// anything
//----------------------------------------------------------------------------------------
{
// Allow for relative or absolute. We can do this in place, because the
// native path is never longer.
if (ioPath.IsEmpty())
return;
// Strip initial slash for an absolute path
char* src = (char*)ioPath;
if (*src == '/') {
if (PL_strlen(src+1)==0) {
// allocate new string by copying from ioPath[1]
nsSimpleCharString temp = src + 1;
ioPath = temp;
return;
}
// Since it was an absolute path, check for the drive letter
char* colonPointer = src + 2;
if (strstr(src, "|/") == colonPointer)
*colonPointer = ':';
// allocate new string by copying from ioPath[1]
nsSimpleCharString temp = src + 1;
ioPath = temp;
}
src = (char*)ioPath;
if (*src) {
// Convert '/' to '\'.
while (*++src)
{
if (*src == '/')
*src = '\\';
}
}
} // nsFileSpecHelpers::UnixToNative
//----------------------------------------------------------------------------------------
void nsFileSpecHelpers::NativeToUnix(nsSimpleCharString& ioPath)
// This just does string manipulation. It doesn't check reality, or canonify, or
// anything. The unix path is longer, so we can't do it in place.
//----------------------------------------------------------------------------------------
{
if (ioPath.IsEmpty())
return;
// Convert the drive-letter separator, if present
nsSimpleCharString temp("/");
char* cp = (char*)ioPath + 1;
if (strstr(cp, ":\\") == cp)
*cp = '|'; // absolute path
else
temp[0] = '\0'; // relative path
// Convert '\' to '/'
for (; *cp; cp++)
{
#ifdef XP_OS2
// OS2TODO - implement equivalent of IsDBCSLeadByte
#else
if(IsDBCSLeadByte(*cp) && *(cp+1) != nsnull)
{
cp++;
continue;
}
#endif
if (*cp == '\\')
*cp = '/';
}
// Add the slash in front.
temp += ioPath;
ioPath = temp;
}
//----------------------------------------------------------------------------------------
nsFileSpec::nsFileSpec(const nsFilePath& inPath)
//----------------------------------------------------------------------------------------
{
// NS_ASSERTION(0, "nsFileSpec is unsupported - use nsIFile!");
*this = inPath;
}
//----------------------------------------------------------------------------------------
void nsFileSpec::operator = (const nsFilePath& inPath)
//----------------------------------------------------------------------------------------
{
mPath = (const char*)inPath;
nsFileSpecHelpers::UnixToNative(mPath);
mError = NS_OK;
} // nsFileSpec::operator =
//----------------------------------------------------------------------------------------
nsFilePath::nsFilePath(const nsFileSpec& inSpec)
//----------------------------------------------------------------------------------------
{
*this = inSpec;
} // nsFilePath::nsFilePath
//----------------------------------------------------------------------------------------
void nsFilePath::operator = (const nsFileSpec& inSpec)
//----------------------------------------------------------------------------------------
{
mPath = inSpec.mPath;
nsFileSpecHelpers::NativeToUnix(mPath);
} // nsFilePath::operator =
//----------------------------------------------------------------------------------------
void nsFileSpec::SetLeafName(const char* inLeafName)
//----------------------------------------------------------------------------------------
{
NS_ASSERTION(inLeafName, "Attempt to SetLeafName with a null string");
mPath.LeafReplace('\\', inLeafName);
} // nsFileSpec::SetLeafName
//----------------------------------------------------------------------------------------
char* nsFileSpec::GetLeafName() const
//----------------------------------------------------------------------------------------
{
return mPath.GetLeaf('\\');
} // nsFileSpec::GetLeafName
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::Exists() const
//----------------------------------------------------------------------------------------
{
struct stat st;
return !mPath.IsEmpty() && 0 == stat(nsNSPRPath(*this), &st);
} // nsFileSpec::Exists
//----------------------------------------------------------------------------------------
void nsFileSpec::GetModDate(TimeStamp& outStamp) const
//----------------------------------------------------------------------------------------
{
struct stat st;
if (!mPath.IsEmpty() && stat(nsNSPRPath(*this), &st) == 0)
outStamp = st.st_mtime;
else
outStamp = 0;
} // nsFileSpec::GetModDate
//----------------------------------------------------------------------------------------
PRUint32 nsFileSpec::GetFileSize() const
//----------------------------------------------------------------------------------------
{
struct stat st;
if (!mPath.IsEmpty() && stat(nsNSPRPath(*this), &st) == 0)
return (PRUint32)st.st_size;
return 0;
} // nsFileSpec::GetFileSize
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsFile() const
//----------------------------------------------------------------------------------------
{
struct stat st;
#ifdef XP_OS2
return !mPath.IsEmpty() && 0 == stat(nsNSPRPath(*this), &st) && ( S_IFREG & st.st_mode);
#else
return !mPath.IsEmpty() && 0 == stat(nsNSPRPath(*this), &st) && (_S_IFREG & st.st_mode);
#endif
} // nsFileSpec::IsFile
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsDirectory() const
//----------------------------------------------------------------------------------------
{
struct stat st;
#ifdef XP_OS2
return !mPath.IsEmpty() && 0 == stat(nsNSPRPath(*this), &st) && ( S_IFDIR & st.st_mode);
#else
return !mPath.IsEmpty() && 0 == stat(nsNSPRPath(*this), &st) && (_S_IFDIR & st.st_mode);
#endif
} // nsFileSpec::IsDirectory
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsHidden() const
//----------------------------------------------------------------------------------------
{
PRBool hidden = PR_FALSE;
if (!mPath.IsEmpty())
{
#ifdef XP_OS2
FILESTATUS3 fs3;
APIRET rc;
rc = DosQueryPathInfo( mPath,
FIL_STANDARD,
&fs3,
sizeof fs3);
if(!rc)
hidden = fs3.attrFile & FILE_HIDDEN ? PR_TRUE : PR_FALSE;
#else
DWORD attr = GetFileAttributes(mPath);
if (FILE_ATTRIBUTE_HIDDEN & attr)
hidden = PR_TRUE;
#endif
}
return hidden;
}
// nsFileSpec::IsHidden
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsSymlink() const
//----------------------------------------------------------------------------------------
{
#ifdef XP_OS2
return PR_FALSE; // No symlinks on OS/2
#else
HRESULT hres;
IShellLink* psl;
PRBool isSymlink = PR_FALSE;
CoInitialize(NULL);
// Get a pointer to the IShellLink interface.
hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER, IID_IShellLink, (void**)&psl);
if (SUCCEEDED(hres))
{
IPersistFile* ppf;
// Get a pointer to the IPersistFile interface.
hres = psl->QueryInterface(IID_IPersistFile, (void**)&ppf);
if (SUCCEEDED(hres))
{
WORD wsz[MAX_PATH];
// Ensure that the string is Unicode.
MultiByteToWideChar(CP_ACP, 0, mPath, -1, wsz, MAX_PATH);
// Load the shortcut.
hres = ppf->Load(wsz, STGM_READ);
if (SUCCEEDED(hres))
{
isSymlink = PR_TRUE;
}
// Release the pointer to the IPersistFile interface.
ppf->Release();
}
// Release the pointer to the IShellLink interface.
psl->Release();
}
CoUninitialize();
return isSymlink;
#endif
}
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::ResolveSymlink(PRBool& wasSymlink)
//----------------------------------------------------------------------------------------
{
#ifdef XP_OS2
return NS_OK; // no symlinks on OS/2
#else
wasSymlink = PR_FALSE; // assume failure
if (Exists())
return NS_OK;
HRESULT hres;
IShellLink* psl;
CoInitialize(NULL);
// Get a pointer to the IShellLink interface.
hres = CoCreateInstance(CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER, IID_IShellLink, (void**)&psl);
if (SUCCEEDED(hres))
{
IPersistFile* ppf;
// Get a pointer to the IPersistFile interface.
hres = psl->QueryInterface(IID_IPersistFile, (void**)&ppf);
if (SUCCEEDED(hres))
{
WORD wsz[MAX_PATH];
// Ensure that the string is Unicode.
MultiByteToWideChar(CP_ACP, 0, mPath, -1, wsz, MAX_PATH);
// Load the shortcut.
hres = ppf->Load(wsz, STGM_READ);
if (SUCCEEDED(hres))
{
wasSymlink = PR_TRUE;
// Resolve the link.
hres = psl->Resolve(nsnull, SLR_NO_UI );
if (SUCCEEDED(hres))
{
char szGotPath[MAX_PATH];
WIN32_FIND_DATA wfd;
// Get the path to the link target.
hres = psl->GetPath( szGotPath, MAX_PATH, &wfd, SLGP_UNCPRIORITY );
if (SUCCEEDED(hres))
{
// Here we modify the nsFileSpec;
mPath = szGotPath;
mError = NS_OK;
}
}
}
else {
// It wasn't a shortcut. Oh well. Leave it like it was.
hres = 0;
}
// Release the pointer to the IPersistFile interface.
ppf->Release();
}
// Release the pointer to the IShellLink interface.
psl->Release();
}
CoUninitialize();
if (SUCCEEDED(hres))
return NS_OK;
return NS_FILE_FAILURE;
#endif
}
//----------------------------------------------------------------------------------------
void nsFileSpec::GetParent(nsFileSpec& outSpec) const
//----------------------------------------------------------------------------------------
{
outSpec.mPath = mPath;
char* chars = (char*)outSpec.mPath;
chars[outSpec.mPath.Length() - 1] = '\0'; // avoid trailing separator, if any
char* cp = strrchr(chars, '\\');
if (cp++)
outSpec.mPath.SetLength(cp - chars); // truncate.
} // nsFileSpec::GetParent
//----------------------------------------------------------------------------------------
void nsFileSpec::operator += (const char* inRelativePath)
//----------------------------------------------------------------------------------------
{
NS_ASSERTION(inRelativePath, "Attempt to do += with a null string");
if (!inRelativePath || mPath.IsEmpty())
return;
if (mPath[mPath.Length() - 1] == '\\')
mPath += "x";
else
mPath += "\\x";
// If it's a (unix) relative path, make it native
nsSimpleCharString dosPath = inRelativePath;
nsFileSpecHelpers::UnixToNative(dosPath);
SetLeafName(dosPath);
} // nsFileSpec::operator +=
//----------------------------------------------------------------------------------------
void nsFileSpec::CreateDirectory(int /*mode*/)
//----------------------------------------------------------------------------------------
{
// Note that mPath is canonical!
if (!mPath.IsEmpty())
#ifdef XP_OS2
// OS2TODO - vacpp complains about mkdir but PR_MkDir should be ok?
PR_MkDir(nsNSPRPath(*this), PR_CREATE_FILE);
#else
mkdir(nsNSPRPath(*this));
#endif
} // nsFileSpec::CreateDirectory
//----------------------------------------------------------------------------------------
void nsFileSpec::Delete(PRBool inRecursive) const
//----------------------------------------------------------------------------------------
{
if (IsDirectory())
{
if (inRecursive)
{
for (nsDirectoryIterator i(*this, PR_FALSE); i.Exists(); i++)
{
nsFileSpec& child = i.Spec();
child.Delete(inRecursive);
}
}
#ifdef XP_OS2
// OS2TODO - vacpp complains if use rmdir but PR_RmDir should be ok?
PR_RmDir(nsNSPRPath(*this));
#else
rmdir(nsNSPRPath(*this));
#endif
}
else if (!mPath.IsEmpty())
{
remove(nsNSPRPath(*this));
}
} // nsFileSpec::Delete
//----------------------------------------------------------------------------------------
void nsFileSpec::RecursiveCopy(nsFileSpec newDir) const
//----------------------------------------------------------------------------------------
{
if (IsDirectory())
{
if (!(newDir.Exists()))
{
newDir.CreateDirectory();
}
for (nsDirectoryIterator i(*this, PR_FALSE); i.Exists(); i++)
{
nsFileSpec& child = i.Spec();
if (child.IsDirectory())
{
nsFileSpec tmpDirSpec(newDir);
char *leafname = child.GetLeafName();
tmpDirSpec += leafname;
nsCRT::free(leafname);
child.RecursiveCopy(tmpDirSpec);
}
else
{
child.RecursiveCopy(newDir);
}
}
}
else if (!mPath.IsEmpty())
{
nsFileSpec& filePath = (nsFileSpec&) *this;
if (!(newDir.Exists()))
{
newDir.CreateDirectory();
}
filePath.CopyToDir(newDir);
}
} // nsFileSpec::RecursiveCopy
//----------------------------------------------------------------------------------------
nsresult
nsFileSpec::Truncate(PRInt32 aNewFileLength) const
//----------------------------------------------------------------------------------------
{
#ifdef XP_OS2
APIRET rc;
HFILE hFile;
ULONG actionTaken;
rc = DosOpen(mPath,
&hFile,
&actionTaken,
0,
FILE_NORMAL,
OPEN_ACTION_FAIL_IF_NEW | OPEN_ACTION_OPEN_IF_EXISTS,
OPEN_SHARE_DENYREADWRITE | OPEN_ACCESS_READWRITE,
NULL);
if (rc != NO_ERROR)
return NS_FILE_FAILURE;
rc = DosSetFileSize(hFile, aNewFileLength);
if (rc == NO_ERROR)
DosClose(hFile);
else
goto error;
#else
DWORD status;
HANDLE hFile;
// Leave it to Microsoft to open an existing file with a function
// named "CreateFile".
hFile = CreateFile(mPath,
GENERIC_WRITE,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (hFile == INVALID_HANDLE_VALUE)
return NS_FILE_FAILURE;
// Seek to new, desired end of file
status = SetFilePointer(hFile, aNewFileLength, NULL, FILE_BEGIN);
if (status == 0xffffffff)
goto error;
// Truncate file at current cursor position
if (!SetEndOfFile(hFile))
goto error;
if (!CloseHandle(hFile))
return NS_FILE_FAILURE;
#endif
return NS_OK;
error:
#ifdef XP_OS2
DosClose(hFile);
#else
CloseHandle(hFile);
#endif
return NS_FILE_FAILURE;
} // nsFileSpec::Truncate
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::Rename(const char* inNewName)
//----------------------------------------------------------------------------------------
{
NS_ASSERTION(inNewName, "Attempt to Rename with a null string");
// This function should not be used to move a file on disk.
if (strchr(inNewName, '/'))
return NS_FILE_FAILURE;
char* oldPath = nsCRT::strdup(mPath);
SetLeafName(inNewName);
if (PR_Rename(oldPath, mPath) != NS_OK)
{
// Could not rename, set back to the original.
mPath = oldPath;
return NS_FILE_FAILURE;
}
nsCRT::free(oldPath);
return NS_OK;
} // nsFileSpec::Rename
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::CopyToDir(const nsFileSpec& inParentDirectory) const
//----------------------------------------------------------------------------------------
{
// We can only copy into a directory, and (for now) can not copy entire directories
if (inParentDirectory.IsDirectory() && (! IsDirectory() ) )
{
char *leafname = GetLeafName();
nsSimpleCharString destPath(inParentDirectory.GetCString());
destPath += "\\";
destPath += leafname;
nsCRT::free(leafname);
// CopyFile returns non-zero if succeeds
#ifdef XP_OS2
APIRET rc;
PRBool copyOK;
rc = DosCopy(GetCString(), (PSZ)destPath, DCPY_EXISTING);
if (rc == NO_ERROR)
copyOK = PR_TRUE;
else
copyOK = PR_FALSE;
#else
int copyOK = CopyFile(GetCString(), destPath, PR_TRUE);
#endif
if (copyOK)
return NS_OK;
}
return NS_FILE_FAILURE;
} // nsFileSpec::CopyToDir
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::MoveToDir(const nsFileSpec& inNewParentDirectory)
//----------------------------------------------------------------------------------------
{
// We can only copy into a directory, and (for now) can not copy entire directories
if (inNewParentDirectory.IsDirectory() && (! IsDirectory() ) )
{
char *leafname = GetLeafName();
nsSimpleCharString destPath(inNewParentDirectory.GetCString());
destPath += "\\";
destPath += leafname;
nsCRT::free(leafname);
if (DosMove(GetCString(), destPath) == NO_ERROR)
{
*this = inNewParentDirectory + GetLeafName();
return NS_OK;
}
}
return NS_FILE_FAILURE;
} // nsFileSpec::MoveToDir
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::Execute(const char* inArgs ) const
//----------------------------------------------------------------------------------------
{
if (!IsDirectory())
{
#ifdef XP_OS2
nsresult result = NS_FILE_FAILURE;
if (!mPath.IsEmpty())
{
nsSimpleCharString fileNameWithArgs = mPath + " " + inArgs;
result = NS_FILE_RESULT(system(fileNameWithArgs));
}
return result;
#else
nsSimpleCharString fileNameWithArgs = "\"";
fileNameWithArgs += mPath + "\" " + inArgs;
int execResult = WinExec( fileNameWithArgs, SW_NORMAL );
if (execResult > 31)
return NS_OK;
#endif
}
return NS_FILE_FAILURE;
} // nsFileSpec::Execute
//----------------------------------------------------------------------------------------
PRInt64 nsFileSpec::GetDiskSpaceAvailable() const
//----------------------------------------------------------------------------------------
{
PRInt64 nBytes = 0;
ULONG ulDriveNo = toupper(mPath[0]) + 1 - 'A';
FSALLOCATE fsAllocate;
APIRET rc = DosQueryFSInfo(ulDriveNo,
FSIL_ALLOC,
&fsAllocate,
sizeof(fsAllocate));
if (rc == NO_ERROR) {
nBytes = fsAllocate.cUnitAvail;
nBytes *= fsAllocate.cSectorUnit;
nBytes *= fsAllocate.cbSector;
}
return nBytes;
}
//========================================================================================
// nsDirectoryIterator
//========================================================================================
//----------------------------------------------------------------------------------------
nsDirectoryIterator::nsDirectoryIterator(const nsFileSpec& inDirectory, PRBool resolveSymlink)
//----------------------------------------------------------------------------------------
: mCurrent(inDirectory)
, mDir(nsnull)
, mStarting(inDirectory)
, mExists(PR_FALSE)
, mResoveSymLinks(resolveSymlink)
{
mDir = PR_OpenDir(inDirectory);
mCurrent += "dummy";
mStarting += "dummy";
++(*this);
} // nsDirectoryIterator::nsDirectoryIterator
//----------------------------------------------------------------------------------------
nsDirectoryIterator::~nsDirectoryIterator()
//----------------------------------------------------------------------------------------
{
if (mDir)
PR_CloseDir(mDir);
} // nsDirectoryIterator::nsDirectoryIterator
//----------------------------------------------------------------------------------------
nsDirectoryIterator& nsDirectoryIterator::operator ++ ()
//----------------------------------------------------------------------------------------
{
mExists = PR_FALSE;
if (!mDir)
return *this;
PRDirEntry* entry = PR_ReadDir(mDir, PR_SKIP_BOTH); // Ignore '.' && '..'
if (entry)
{
mExists = PR_TRUE;
mCurrent = mStarting;
mCurrent.SetLeafName(entry->name);
if (mResoveSymLinks)
{
PRBool ignore;
mCurrent.ResolveSymlink(ignore);
}
}
return *this;
} // nsDirectoryIterator::operator ++
//----------------------------------------------------------------------------------------
nsDirectoryIterator& nsDirectoryIterator::operator -- ()
//----------------------------------------------------------------------------------------
{
return ++(*this); // can't do it backwards.
} // nsDirectoryIterator::operator --
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