зеркало из https://github.com/mozilla/pjs.git
588 строки
18 KiB
C++
588 строки
18 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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// This file is included by nsFileSpec.cpp, and includes the Unix-specific
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// implementations.
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#include <sys/stat.h>
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#include <sys/param.h>
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#include <errno.h>
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#include <dirent.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <limits.h>
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#include "nsError.h"
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#include "prio.h" /* for PR_Rename */
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#if defined(_SCO_DS)
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#define _SVID3 /* for statvfs.h */
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#endif
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#ifdef HAVE_SYS_STATVFS_H
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#include <sys/statvfs.h>
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#endif
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#ifdef HAVE_SYS_VFS_H
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#include <sys/vfs.h>
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#endif
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#ifdef HAVE_SYS_STATFS_H
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#include <sys/statfs.h>
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#endif
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#ifdef HAVE_SYS_MOUNT_H
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#include <sys/mount.h>
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#ifdef __bsdi__
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#undef Free
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#endif
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#endif
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#ifdef HAVE_STATVFS
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#define STATFS statvfs
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#else
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#define STATFS statfs
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#endif
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#ifndef MAXPATHLEN
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#define MAXPATHLEN 1024 /* Guessing this is okay. Works for SCO. */
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#endif
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#if defined(__QNX__)
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#include <unix.h> /* for realpath */
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#define f_bavail f_bfree
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#endif
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#if defined(SUNOS4)
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extern "C" int statfs(char *, struct statfs *);
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#endif
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#if defined(OSF1)
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extern "C" int statvfs(const char *, struct statvfs *);
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#endif
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//----------------------------------------------------------------------------------------
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void nsFileSpecHelpers::Canonify(nsSimpleCharString& ioPath, PRBool inMakeDirs)
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// Canonify, make absolute, and check whether directories exist
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//----------------------------------------------------------------------------------------
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{
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if (ioPath.IsEmpty())
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return;
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if (inMakeDirs)
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{
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const mode_t mode = 0700;
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nsFileSpecHelpers::MakeAllDirectories((const char*)ioPath, mode);
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}
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errno = 0; // needed?
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if (ioPath[0] != '/')
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{
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// the ioPath that was passed in is relative. We must cat it to the cwd.
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char buffer[MAXPATHLEN];
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(void) getcwd(buffer, MAXPATHLEN);
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strcat(buffer, "/");
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strcat(buffer, ioPath);
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ioPath = buffer;
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}
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} // nsFileSpecHelpers::Canonify
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//----------------------------------------------------------------------------------------
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void nsFileSpec::SetLeafName(const char* inLeafName)
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//----------------------------------------------------------------------------------------
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{
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mPath.LeafReplace('/', inLeafName);
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} // nsFileSpec::SetLeafName
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//----------------------------------------------------------------------------------------
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char* nsFileSpec::GetLeafName() const
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//----------------------------------------------------------------------------------------
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{
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return mPath.GetLeaf('/');
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} // nsFileSpec::GetLeafName
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//----------------------------------------------------------------------------------------
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PRBool nsFileSpec::Exists() const
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//----------------------------------------------------------------------------------------
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{
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struct stat st;
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return !mPath.IsEmpty() && 0 == stat(mPath, &st);
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} // nsFileSpec::Exists
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//----------------------------------------------------------------------------------------
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void nsFileSpec::GetModDate(TimeStamp& outStamp) const
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//----------------------------------------------------------------------------------------
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{
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struct stat st;
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if (!mPath.IsEmpty() && stat(mPath, &st) == 0)
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outStamp = st.st_mtime;
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else
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outStamp = 0;
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} // nsFileSpec::GetModDate
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//----------------------------------------------------------------------------------------
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PRUint32 nsFileSpec::GetFileSize() const
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//----------------------------------------------------------------------------------------
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{
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struct stat st;
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if (!mPath.IsEmpty() && stat(mPath, &st) == 0)
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return (PRUint32)st.st_size;
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return 0;
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} // nsFileSpec::GetFileSize
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//----------------------------------------------------------------------------------------
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PRBool nsFileSpec::IsFile() const
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//----------------------------------------------------------------------------------------
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{
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struct stat st;
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return !mPath.IsEmpty() && stat(mPath, &st) == 0 && S_ISREG(st.st_mode);
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} // nsFileSpec::IsFile
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//----------------------------------------------------------------------------------------
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PRBool nsFileSpec::IsDirectory() const
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//----------------------------------------------------------------------------------------
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{
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struct stat st;
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return !mPath.IsEmpty() && 0 == stat(mPath, &st) && S_ISDIR(st.st_mode);
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} // nsFileSpec::IsDirectory
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//----------------------------------------------------------------------------------------
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PRBool nsFileSpec::IsHidden() const
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//----------------------------------------------------------------------------------------
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{
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PRBool hidden = PR_FALSE;
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char *leafname = GetLeafName();
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if (nsnull != leafname)
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{
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// rjc: don't return ".", "..", or any file/directory that begins with a "."
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/* if ((!strcmp(leafname, ".")) || (!strcmp(leafname, ".."))) */
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if (leafname[0] == '.')
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{
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hidden = PR_TRUE;
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}
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nsCRT::free(leafname);
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}
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return hidden;
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} // nsFileSpec::IsHidden
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//----------------------------------------------------------------------------------------
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PRBool nsFileSpec::IsSymlink() const
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//----------------------------------------------------------------------------------------
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{
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struct stat st;
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if (!mPath.IsEmpty() && stat(mPath, &st) == 0 && S_ISLNK(st.st_mode))
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return PR_TRUE;
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return PR_FALSE;
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} // nsFileSpec::IsSymlink
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//----------------------------------------------------------------------------------------
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nsresult nsFileSpec::ResolveSymlink(PRBool& wasAliased)
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//----------------------------------------------------------------------------------------
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{
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wasAliased = PR_FALSE;
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char resolvedPath[MAXPATHLEN];
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int charCount = readlink(mPath, (char*)&resolvedPath, MAXPATHLEN);
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if (0 < charCount)
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{
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if (MAXPATHLEN > charCount)
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resolvedPath[charCount] = '\0';
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wasAliased = PR_TRUE;
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/* if it's not an absolute path,
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replace the leaf with what got resolved */
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if (resolvedPath[0] != '/') {
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SetLeafName(resolvedPath);
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}
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else {
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mPath = (char*)&resolvedPath;
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}
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char* canonicalPath = realpath((const char *)mPath, resolvedPath);
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NS_ASSERTION(canonicalPath, "realpath failed");
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if (canonicalPath) {
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mPath = (char*)&resolvedPath;
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}
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else {
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return NS_ERROR_FAILURE;
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}
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}
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return NS_OK;
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} // nsFileSpec::ResolveSymlink
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//----------------------------------------------------------------------------------------
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void nsFileSpec::GetParent(nsFileSpec& outSpec) const
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//----------------------------------------------------------------------------------------
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{
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outSpec.mPath = mPath;
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char* chars = (char*)outSpec.mPath;
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chars[outSpec.mPath.Length() - 1] = '\0'; // avoid trailing separator, if any
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char* cp = strrchr(chars, '/');
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if (cp++)
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outSpec.mPath.SetLength(cp - chars); // truncate.
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} // nsFileSpec::GetParent
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//----------------------------------------------------------------------------------------
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void nsFileSpec::operator += (const char* inRelativePath)
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//----------------------------------------------------------------------------------------
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{
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NS_ASSERTION(inRelativePath, "Attempt to do += with a null string");
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if (!inRelativePath || mPath.IsEmpty())
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return;
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char endChar = mPath[(int)(strlen(mPath) - 1)];
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if (endChar == '/')
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mPath += "x";
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else
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mPath += "/x";
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SetLeafName(inRelativePath);
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} // nsFileSpec::operator +=
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//----------------------------------------------------------------------------------------
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void nsFileSpec::CreateDirectory(int mode)
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//----------------------------------------------------------------------------------------
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{
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// Note that mPath is canonical!
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if (mPath.IsEmpty())
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return;
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mkdir(mPath, mode);
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} // nsFileSpec::CreateDirectory
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//----------------------------------------------------------------------------------------
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void nsFileSpec::Delete(PRBool inRecursive) const
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// To check if this worked, call Exists() afterwards, see?
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//----------------------------------------------------------------------------------------
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{
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if (IsDirectory())
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{
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if (inRecursive)
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{
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for (nsDirectoryIterator i(*this, PR_FALSE); i.Exists(); i++)
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{
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nsFileSpec& child = (nsFileSpec&)i;
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child.Delete(inRecursive);
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}
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}
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rmdir(mPath);
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}
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else if (!mPath.IsEmpty())
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remove(mPath);
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} // nsFileSpec::Delete
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//----------------------------------------------------------------------------------------
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void nsFileSpec::RecursiveCopy(nsFileSpec newDir) const
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//----------------------------------------------------------------------------------------
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{
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if (IsDirectory())
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{
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if (!(newDir.Exists()))
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{
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newDir.CreateDirectory();
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}
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for (nsDirectoryIterator i(*this, PR_FALSE); i.Exists(); i++)
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{
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nsFileSpec& child = (nsFileSpec&)i;
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if (child.IsDirectory())
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{
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nsFileSpec tmpDirSpec(newDir);
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char *leafname = child.GetLeafName();
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tmpDirSpec += leafname;
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nsCRT::free(leafname);
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child.RecursiveCopy(tmpDirSpec);
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}
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else
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{
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child.RecursiveCopy(newDir);
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}
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}
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}
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else if (!mPath.IsEmpty())
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{
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nsFileSpec& filePath = (nsFileSpec&) *this;
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if (!(newDir.Exists()))
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{
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newDir.CreateDirectory();
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}
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filePath.Copy(newDir);
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}
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} // nsFileSpec::RecursiveCopy
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//----------------------------------------------------------------------------------------
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nsresult nsFileSpec::Rename(const char* inNewName)
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//----------------------------------------------------------------------------------------
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{
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NS_ASSERTION(inNewName, "Attempt to Rename with a null string");
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// This function should not be used to move a file on disk.
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if (mPath.IsEmpty() || strchr(inNewName, '/'))
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return NS_FILE_FAILURE;
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char* oldPath = nsCRT::strdup(mPath);
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SetLeafName(inNewName);
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if (PR_Rename(oldPath, mPath) != NS_OK)
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{
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// Could not rename, set back to the original.
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mPath = oldPath;
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return NS_FILE_FAILURE;
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}
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nsCRT::free(oldPath);
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return NS_OK;
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} // nsFileSpec::Rename
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//----------------------------------------------------------------------------------------
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static int CrudeFileCopy(const char* in, const char* out)
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//----------------------------------------------------------------------------------------
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{
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struct stat in_stat;
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int stat_result = -1;
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char buf [1024];
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FILE *ifp, *ofp;
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int rbytes, wbytes;
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if (!in || !out)
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return -1;
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stat_result = stat (in, &in_stat);
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ifp = fopen (in, "r");
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if (!ifp)
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{
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return -1;
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}
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ofp = fopen (out, "w");
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if (!ofp)
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{
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fclose (ifp);
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return -1;
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}
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while ((rbytes = fread (buf, 1, sizeof(buf), ifp)) > 0)
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{
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while (rbytes > 0)
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{
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if ( (wbytes = fwrite (buf, 1, rbytes, ofp)) < 0 )
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{
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fclose (ofp);
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fclose (ifp);
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unlink(out);
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return -1;
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}
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rbytes -= wbytes;
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}
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}
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fclose (ofp);
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fclose (ifp);
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if (stat_result == 0)
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chmod (out, in_stat.st_mode & 0777);
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return 0;
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} // nsFileSpec::Rename
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//----------------------------------------------------------------------------------------
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nsresult nsFileSpec::Copy(const nsFileSpec& inParentDirectory) const
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//----------------------------------------------------------------------------------------
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{
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// We can only copy into a directory, and (for now) can not copy entire directories
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nsresult result = NS_FILE_FAILURE;
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if (inParentDirectory.IsDirectory() && (! IsDirectory() ) )
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{
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char *leafname = GetLeafName();
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nsSimpleCharString destPath(inParentDirectory.GetCString());
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destPath += "/";
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destPath += leafname;
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nsCRT::free(leafname);
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result = NS_FILE_RESULT(CrudeFileCopy(GetCString(), destPath));
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}
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return result;
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} // nsFileSpec::Copy
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//----------------------------------------------------------------------------------------
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nsresult nsFileSpec::Move(const nsFileSpec& inNewParentDirectory)
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//----------------------------------------------------------------------------------------
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{
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// We can only copy into a directory, and (for now) can not copy entire directories
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nsresult result = NS_FILE_FAILURE;
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if (inNewParentDirectory.IsDirectory() && !IsDirectory())
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{
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char *leafname = GetLeafName();
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nsSimpleCharString destPath(inNewParentDirectory.GetCString());
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destPath += "/";
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destPath += leafname;
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nsCRT::free(leafname);
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result = NS_FILE_RESULT(CrudeFileCopy(GetCString(), (const char*)destPath));
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if (result == NS_OK)
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{
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// cast to fix const-ness
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((nsFileSpec*)this)->Delete(PR_FALSE);
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*this = inNewParentDirectory + GetLeafName();
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}
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}
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return result;
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}
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//----------------------------------------------------------------------------------------
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nsresult nsFileSpec::Execute(const char* inArgs ) const
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//----------------------------------------------------------------------------------------
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{
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nsresult result = NS_FILE_FAILURE;
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if (!mPath.IsEmpty() && !IsDirectory())
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{
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nsSimpleCharString fileNameWithArgs = mPath + " " + inArgs;
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result = NS_FILE_RESULT(system(fileNameWithArgs));
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}
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return result;
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} // nsFileSpec::Execute
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//----------------------------------------------------------------------------------------
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PRInt64 nsFileSpec::GetDiskSpaceAvailable() const
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//----------------------------------------------------------------------------------------
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{
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PRInt64 bytes; /* XXX dougt needs to fix this */
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LL_I2L(bytes , LONG_MAX); // initialize to all the space in the world?
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#if defined(HAVE_SYS_STATFS_H) || defined(HAVE_SYS_STATVFS_H)
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char curdir [MAXPATHLEN];
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if (mPath.IsEmpty())
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{
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(void) getcwd(curdir, MAXPATHLEN);
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if (!curdir)
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return bytes; /* hope for the best as we did in cheddar */
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}
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else
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sprintf(curdir, "%.200s", (const char*)mPath);
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struct STATFS fs_buf;
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#if defined(__QNX__) && !defined(HAVE_STATVFS) /* Maybe this should be handled differently? */
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if (STATFS(curdir, &fs_buf, 0, 0) < 0)
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#else
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if (STATFS(curdir, &fs_buf) < 0)
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#endif
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return bytes; /* hope for the best as we did in cheddar */
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#ifdef DEBUG_DISK_SPACE
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printf("DiskSpaceAvailable: %d bytes\n",
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fs_buf.f_bsize * (fs_buf.f_bavail - 1));
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#endif
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LL_I2L( bytes, (fs_buf.f_bsize * (fs_buf.f_bavail - 1) ) );
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return bytes;
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#else
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/*
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** This platform doesn't have statfs or statvfs, so we don't have much
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** choice but to "hope for the best as we did in cheddar".
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*/
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return bytes;
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#endif /* HAVE_SYS_STATFS_H or HAVE_SYS_STATVFS_H */
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} // nsFileSpec::GetDiskSpace()
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//========================================================================================
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// nsDirectoryIterator
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//========================================================================================
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//----------------------------------------------------------------------------------------
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nsDirectoryIterator::nsDirectoryIterator(const nsFileSpec& inDirectory, PRBool resolveSymLinks)
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//----------------------------------------------------------------------------------------
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: mCurrent(inDirectory)
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, mExists(PR_FALSE)
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, mResoveSymLinks(resolveSymLinks)
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, mStarting(inDirectory)
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, mDir(nsnull)
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{
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mStarting += "sysygy"; // save off the starting directory
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mCurrent += "sysygy"; // prepare the path for SetLeafName
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mDir = opendir((const char*)nsFilePath(inDirectory));
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++(*this);
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} // nsDirectoryIterator::nsDirectoryIterator
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//----------------------------------------------------------------------------------------
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nsDirectoryIterator::~nsDirectoryIterator()
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//----------------------------------------------------------------------------------------
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{
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if (mDir)
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closedir(mDir);
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} // nsDirectoryIterator::nsDirectoryIterator
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//----------------------------------------------------------------------------------------
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nsDirectoryIterator& nsDirectoryIterator::operator ++ ()
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//----------------------------------------------------------------------------------------
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{
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mExists = PR_FALSE;
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if (!mDir)
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return *this;
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char* dot = ".";
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char* dotdot = "..";
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struct dirent* entry = readdir(mDir);
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if (entry && strcmp(entry->d_name, dot) == 0)
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entry = readdir(mDir);
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if (entry && strcmp(entry->d_name, dotdot) == 0)
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entry = readdir(mDir);
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if (entry)
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{
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mExists = PR_TRUE;
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mCurrent = mStarting; // restore mCurrent to be the starting directory. ResolveSymlink() may have taken us to another directory
|
|
mCurrent.SetLeafName(entry->d_name);
|
|
if (mResoveSymLinks)
|
|
{
|
|
PRBool ignore;
|
|
mCurrent.ResolveSymlink(ignore);
|
|
}
|
|
}
|
|
return *this;
|
|
} // nsDirectoryIterator::operator ++
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
nsDirectoryIterator& nsDirectoryIterator::operator -- ()
|
|
//----------------------------------------------------------------------------------------
|
|
{
|
|
return ++(*this); // can't do it backwards.
|
|
} // nsDirectoryIterator::operator --
|