pjs/xpcom/io/nsFileSpecUnix.cpp

441 строка
14 KiB
C++
Исходник Обычный вид История

1998-12-08 05:15:50 +03:00
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
// This file is included by nsFileSpec.cpp, and includes the Unix-specific
// implementations.
#include <sys/stat.h>
#include <sys/param.h>
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#include <errno.h>
#include <dirent.h>
#include <unistd.h>
#include <stdlib.h>
#include <limits.h>
#include "nsError.h"
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#if defined(IRIX) || defined(OSF1) || defined(SOLARIS) || defined(UNIXWARE) || defined(SNI) || defined(NCR) || defined(NEC) || defined(DGUX) || defined(NTO)
#include <sys/statvfs.h> /* for statvfs() */
#define STATFS statvfs
#elif defined(SCO_SV)
#define _SVID3/* for statvfs.h */
#include <sys/statvfs.h> /* for statvfs() */
#define STATFS statvfs
#elif defined(HPUX) || defined(LINUX)
#include <sys/vfs.h> /* for statfs() */
#define STATFS statfs
#if defined(SUNOS4)
extern "C" int statfs(char *, struct statfs *);
#endif
#else
#if defined(BSDI) || defined(NETBSD) || defined(OPENBSD) || defined(RHAPSODY) || defined(FREEBSD)
#include <sys/mount.h>/* for statfs() */
#define STATFS statfs
#else
#include <sys/statfs.h> /* for statfs() */
#define STATFS statfs
extern "C" int statfs(char *, struct statfs *);
#endif
#endif
#if defined(OSF1)
extern "C" int statvfs(const char *, struct statvfs *);
#endif
//----------------------------------------------------------------------------------------
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void nsFileSpecHelpers::Canonify(nsSimpleCharString& ioPath, PRBool inMakeDirs)
// Canonify, make absolute, and check whether directories exist
//----------------------------------------------------------------------------------------
{
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if (ioPath.IsEmpty())
return;
if (inMakeDirs)
{
const mode_t mode = 0700;
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nsFileSpecHelpers::MakeAllDirectories((const char*)ioPath, mode);
}
char buffer[MAXPATHLEN];
errno = 0;
*buffer = '\0';
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char* canonicalPath = realpath((const char*)ioPath, buffer);
if (!canonicalPath)
{
// Linux's realpath() is pathetically buggy. If the reason for the nil
// result is just that the leaf does not exist, strip the leaf off,
// process that, and then add the leaf back.
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nsSimpleCharString allButLeaf(ioPath);
if (allButLeaf.IsEmpty())
return;
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char* lastSeparator = strrchr((char*)allButLeaf, '/');
if (lastSeparator)
{
*lastSeparator = '\0';
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canonicalPath = realpath((const char*)allButLeaf, buffer);
strcat(buffer, "/");
// Add back the leaf
strcat(buffer, ++lastSeparator);
}
}
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if (!canonicalPath && ioPath[0] != '/' && !inMakeDirs)
{
// Well, if it's a relative path, hack it ourselves.
canonicalPath = realpath(".", buffer);
if (canonicalPath)
{
strcat(canonicalPath, "/");
strcat(canonicalPath, ioPath);
}
}
if (canonicalPath)
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ioPath = canonicalPath;
} // nsFileSpecHelpers::Canonify
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//----------------------------------------------------------------------------------------
void nsFileSpec::SetLeafName(const char* inLeafName)
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//----------------------------------------------------------------------------------------
{
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mPath.LeafReplace('/', inLeafName);
} // nsFileSpec::SetLeafName
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//----------------------------------------------------------------------------------------
char* nsFileSpec::GetLeafName() const
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//----------------------------------------------------------------------------------------
{
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return mPath.GetLeaf('/');
} // nsFileSpec::GetLeafName
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//----------------------------------------------------------------------------------------
PRBool nsFileSpec::Exists() const
//----------------------------------------------------------------------------------------
{
struct stat st;
return 0 == stat(mPath, &st);
} // nsFileSpec::Exists
//----------------------------------------------------------------------------------------
void nsFileSpec::GetModDate(TimeStamp& outStamp) const
//----------------------------------------------------------------------------------------
{
struct stat st;
if (stat(mPath, &st) == 0)
outStamp = st.st_mtime;
else
outStamp = 0;
} // nsFileSpec::GetModDate
//----------------------------------------------------------------------------------------
PRUint32 nsFileSpec::GetFileSize() const
//----------------------------------------------------------------------------------------
{
struct stat st;
if (stat(mPath, &st) == 0)
return (PRUint32)st.st_size;
return 0;
} // nsFileSpec::GetFileSize
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsFile() const
//----------------------------------------------------------------------------------------
{
struct stat st;
return 0 == stat(mPath, &st) && S_ISREG(st.st_mode);
} // nsFileSpec::IsFile
//----------------------------------------------------------------------------------------
PRBool nsFileSpec::IsDirectory() const
//----------------------------------------------------------------------------------------
{
struct stat st;
return 0 == stat(mPath, &st) && S_ISDIR(st.st_mode);
} // nsFileSpec::IsDirectory
//----------------------------------------------------------------------------------------
void nsFileSpec::GetParent(nsFileSpec& outSpec) const
//----------------------------------------------------------------------------------------
{
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outSpec.mPath = mPath;
char* cp = strrchr(outSpec.mPath, '/');
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if (cp++)
*cp = '\0';
} // nsFileSpec::GetParent
//----------------------------------------------------------------------------------------
void nsFileSpec::operator += (const char* inRelativePath)
//----------------------------------------------------------------------------------------
{
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if (!inRelativePath || mPath.IsEmpty())
return;
char endChar = mPath[(int)(strlen(mPath) - 1)];
if (endChar == '/')
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mPath += "x";
else
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mPath += "/x";
SetLeafName(inRelativePath);
} // nsFileSpec::operator +=
//----------------------------------------------------------------------------------------
void nsFileSpec::CreateDirectory(int mode)
//----------------------------------------------------------------------------------------
{
// Note that mPath is canonical!
mkdir(mPath, mode);
} // nsFileSpec::CreateDirectory
//----------------------------------------------------------------------------------------
void nsFileSpec::Delete(PRBool inRecursive) const
// To check if this worked, call Exists() afterwards, see?
//----------------------------------------------------------------------------------------
{
if (IsDirectory())
{
if (inRecursive)
{
for (nsDirectoryIterator i(*this); i.Exists(); i++)
{
nsFileSpec& child = (nsFileSpec&)i;
child.Delete(inRecursive);
}
}
rmdir(mPath);
}
else
remove(mPath);
} // nsFileSpec::Delete
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::Rename(const char* inNewName)
//----------------------------------------------------------------------------------------
{
// This function should not be used to move a file on disk.
if (strchr(inNewName, '/'))
return NS_FILE_FAILURE;
char* oldPath = PL_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;
}
delete [] oldPath;
return NS_OK;
} // nsFileSpec::Rename
//----------------------------------------------------------------------------------------
static int CrudeFileCopy(const char* in, const char* out)
//----------------------------------------------------------------------------------------
{
struct stat in_stat;
int stat_result = -1;
char buf [1024];
FILE *ifp, *ofp;
int rbytes, wbytes;
if (!in || !out)
return -1;
stat_result = stat (in, &in_stat);
ifp = fopen (in, "r");
if (!ifp)
{
return -1;
}
ofp = fopen (out, "w");
if (!ofp)
{
fclose (ifp);
return -1;
}
while ((rbytes = fread (buf, 1, sizeof(buf), ifp)) > 0)
{
while (rbytes > 0)
{
if ( (wbytes = fwrite (buf, 1, rbytes, ofp)) < 0 )
{
fclose (ofp);
fclose (ifp);
unlink(out);
return -1;
}
rbytes -= wbytes;
}
}
fclose (ofp);
fclose (ifp);
if (stat_result == 0)
{
chmod (out, in_stat.st_mode & 0777);
}
return 0;
} // nsFileSpec::Rename
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::Copy(const nsFileSpec& inParentDirectory) const
//----------------------------------------------------------------------------------------
{
// We can only copy into a directory, and (for now) can not copy entire directories
nsresult result = NS_FILE_FAILURE;
if (inParentDirectory.IsDirectory() && (! IsDirectory() ) )
{
char *leafname = GetLeafName();
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nsSimpleCharString destPath(inParentDirectory.GetCString());
destPath += "/";
destPath += leafname;
delete [] leafname;
result = NS_FILE_RESULT(CrudeFileCopy(GetCString(), destPath));
}
return result;
} // nsFileSpec::Copy
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::Move(const nsFileSpec& inNewParentDirectory)
//----------------------------------------------------------------------------------------
{
// We can only copy into a directory, and (for now) can not copy entire directories
nsresult result = NS_FILE_FAILURE;
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if (inNewParentDirectory.IsDirectory() && !IsDirectory())
{
char *leafname = GetLeafName();
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nsSimpleCharString destPath(inNewParentDirectory.GetCString());
destPath += "/";
destPath += leafname;
delete [] leafname;
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result = NS_FILE_RESULT(CrudeFileCopy(GetCString(), (const char*)destPath));
if (result == NS_OK)
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{
// cast to fix const-ness
((nsFileSpec*)this)->Delete(PR_FALSE);
*this = inNewParentDirectory + GetLeafName();
}
}
return result;
}
//----------------------------------------------------------------------------------------
nsresult nsFileSpec::Execute(const char* inArgs ) const
//----------------------------------------------------------------------------------------
{
nsresult result = NS_FILE_FAILURE;
if (! IsDirectory())
{
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nsSimpleCharString fileNameWithArgs = mPath + " " + inArgs;
result = NS_FILE_RESULT(system(fileNameWithArgs));
}
return result;
} // nsFileSpec::Execute
//----------------------------------------------------------------------------------------
PRUint32 nsFileSpec::GetDiskSpaceAvailable() const
//----------------------------------------------------------------------------------------
{
char curdir [MAXPATHLEN];
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if (mPath.IsEmpty())
{
(void) getcwd(curdir, MAXPATHLEN);
if (!curdir)
return ULONG_MAX; /* hope for the best as we did in cheddar */
}
else
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sprintf(curdir, "%.200s", (const char*)mPath);
struct STATFS fs_buf;
if (STATFS(curdir, &fs_buf) < 0)
return ULONG_MAX; /* hope for the best as we did in cheddar */
#ifdef DEBUG_DISK_SPACE
printf("DiskSpaceAvailable: %d bytes\n",
fs_buf.f_bsize * (fs_buf.f_bavail - 1));
#endif
return fs_buf.f_bsize * (fs_buf.f_bavail - 1);
} // nsFileSpec::GetDiskSpace()
//========================================================================================
// nsDirectoryIterator
//========================================================================================
//----------------------------------------------------------------------------------------
nsDirectoryIterator::nsDirectoryIterator(
const nsFileSpec& inDirectory
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, int /*inIterateDirection*/)
//----------------------------------------------------------------------------------------
: mCurrent(inDirectory)
, mExists(PR_FALSE)
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, mDir(nsnull)
{
mCurrent += "sysygy"; // prepare the path for SetLeafName
mDir = opendir((const char*)nsFilePath(inDirectory));
++(*this);
} // nsDirectoryIterator::nsDirectoryIterator
//----------------------------------------------------------------------------------------
nsDirectoryIterator::~nsDirectoryIterator()
//----------------------------------------------------------------------------------------
{
if (mDir)
closedir(mDir);
} // nsDirectoryIterator::nsDirectoryIterator
//----------------------------------------------------------------------------------------
nsDirectoryIterator& nsDirectoryIterator::operator ++ ()
//----------------------------------------------------------------------------------------
{
mExists = PR_FALSE;
if (!mDir)
return *this;
char* dot = ".";
char* dotdot = "..";
struct dirent* entry = readdir(mDir);
if (entry && strcmp(entry->d_name, dot) == 0)
entry = readdir(mDir);
if (entry && strcmp(entry->d_name, dotdot) == 0)
entry = readdir(mDir);
if (entry)
{
mExists = PR_TRUE;
mCurrent.SetLeafName(entry->d_name);
}
return *this;
} // nsDirectoryIterator::operator ++
//----------------------------------------------------------------------------------------
nsDirectoryIterator& nsDirectoryIterator::operator -- ()
//----------------------------------------------------------------------------------------
{
return ++(*this); // can't do it backwards.
} // nsDirectoryIterator::operator --