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Diffstat (limited to 'src/mgr/filemgr.cpp')
-rw-r--r-- | src/mgr/filemgr.cpp | 357 |
1 files changed, 0 insertions, 357 deletions
diff --git a/src/mgr/filemgr.cpp b/src/mgr/filemgr.cpp deleted file mode 100644 index 44bc768..0000000 --- a/src/mgr/filemgr.cpp +++ /dev/null @@ -1,357 +0,0 @@ -/****************************************************************************** - * filemgr.cpp - implementation of class FileMgr used for pooling file - * handles - * - * $Id: filemgr.cpp,v 1.33 2003/12/23 01:36:12 chrislit Exp $ - * - * Copyright 1998 CrossWire Bible Society (http://www.crosswire.org) - * CrossWire Bible Society - * P. O. Box 2528 - * Tempe, AZ 85280-2528 - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation version 2. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - */ - -#include <filemgr.h> -#include <utilstr.h> - -#include <dirent.h> -#include <fcntl.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <stdio.h> -#include <string.h> -#if !defined(__GNUC__) && !defined(_WIN32_WCE) -#include <io.h> -#include <direct.h> -#else -#include <unistd.h> -#endif - -#ifndef O_BINARY -#define O_BINARY 0 -#endif - -#ifndef S_IRGRP -#define S_IRGRP 0 -#endif - -#ifndef S_IROTH -#define S_IROTH 0 -#endif - -SWORD_NAMESPACE_START - -// ---------------- statics ----------------- -FileMgr FileMgr::systemFileMgr; - -// --------------- end statics -------------- - - -FileDesc::FileDesc(FileMgr *parent, const char *path, int mode, int perms, bool tryDowngrade) { - this->parent = parent; - this->path = 0; - stdstr(&this->path, path); - this->mode = mode; - this->perms = perms; - this->tryDowngrade = tryDowngrade; - offset = 0; - fd = -77; -} - - -FileDesc::~FileDesc() { - if (fd > 0) - close(fd); - - if (path) - delete [] path; -} - - -int FileDesc::getFd() { - if (fd == -77) - fd = parent->sysOpen(this); - return fd; -} - - -FileMgr::FileMgr(int maxFiles) { - this->maxFiles = maxFiles; // must be at least 2 - files = 0; -} - - -FileMgr::~FileMgr() { - FileDesc *tmp; - - while(files) { - tmp = files->next; - delete files; - files = tmp; - } -} - - -FileDesc *FileMgr::open(const char *path, int mode, bool tryDowngrade) { - return open(path, mode, S_IREAD | S_IWRITE|S_IRGRP|S_IROTH, tryDowngrade); -} - -FileDesc *FileMgr::open(const char *path, int mode, int perms, bool tryDowngrade) { - FileDesc **tmp, *tmp2; - - for (tmp = &files; *tmp; tmp = &((*tmp)->next)) { - if ((*tmp)->fd < 0) // insert as first non-system_open file - break; - } - - tmp2 = new FileDesc(this, path, mode, perms, tryDowngrade); - tmp2->next = *tmp; - *tmp = tmp2; - - return tmp2; -} - - -void FileMgr::close(FileDesc *file) { - FileDesc **loop; - - for (loop = &files; *loop; loop = &((*loop)->next)) { - if (*loop == file) { - *loop = (*loop)->next; - delete file; - break; - } - } -} - - -// to truncate a file at its current position -// leaving byte at current possition intact -// deleting everything afterward. -signed char FileMgr::trunc(FileDesc *file) { - - static const char *writeTest = "x"; - long size = lseek(file->getFd(), 1, SEEK_CUR); - if (size == 1) // was empty - size = 0; - char nibble [ 32767 ]; - bool writable = write(file->getFd(), writeTest, 1); - int bytes = 0; - - if (writable) { - // get tmpfilename - char *buf = new char [ strlen(file->path) + 10 ]; - int i; - for (i = 0; i < 9999; i++) { - sprintf(buf, "%stmp%.4d", file->path, i); - if (!existsFile(buf)) - break; - } - if (i == 9999) - return -2; - - int fd = ::open(buf, O_CREAT|O_RDWR, S_IREAD|S_IWRITE|S_IRGRP|S_IROTH); - if (fd < 0) - return -3; - - lseek(file->getFd(), 0, SEEK_SET); - while (size > 0) { - bytes = read(file->getFd(), nibble, 32767); - write(fd, nibble, (bytes < size)?bytes:size); - size -= bytes; - } - // zero out the file - ::close(file->fd); - file->fd = ::open(file->path, O_TRUNC, S_IREAD|S_IWRITE|S_IRGRP|S_IROTH); - ::close(file->fd); - file->fd = -77; // force file open by filemgr - // copy tmp file back (dumb, but must preserve file permissions) - lseek(fd, 0, SEEK_SET); - do { - bytes = read(fd, nibble, 32767); - write(file->getFd(), nibble, bytes); - } while (bytes == 32767); - - ::close(fd); - ::close(file->fd); - removeFile(buf); // remove our tmp file - file->fd = -77; // causes file to be swapped out forcing open on next call to getFd() - } - else { // put offset back and return failure - lseek(file->getFd(), -1, SEEK_CUR); - return -1; - } - return 0; -} - - -int FileMgr::sysOpen(FileDesc *file) { - FileDesc **loop; - int openCount = 1; // because we are presently opening 1 file, and we need to be sure to close files to accomodate, if necessary - - for (loop = &files; *loop; loop = &((*loop)->next)) { - - if ((*loop)->fd > 0) { - if (++openCount > maxFiles) { - (*loop)->offset = lseek((*loop)->fd, 0, SEEK_CUR); - ::close((*loop)->fd); - (*loop)->fd = -77; - } - } - - if (*loop == file) { - if (*loop != files) { - *loop = (*loop)->next; - file->next = files; - files = file; - } - if ((!access(file->path, 04)) || ((file->mode & O_CREAT) == O_CREAT)) { // check for at least file exists / read access before we try to open - char tries = (((file->mode & O_RDWR) == O_RDWR) && (file->tryDowngrade)) ? 2 : 1; // try read/write if possible - for (int i = 0; i < tries; i++) { - if (i > 0) { - file->mode = (file->mode & ~O_RDWR); // remove write access - file->mode = (file->mode | O_RDONLY);// add read access - } - file->fd = ::open(file->path, file->mode, file->perms); - - if (file->fd >= 0) - break; - } - - if (file->fd >= 0) - lseek(file->fd, file->offset, SEEK_SET); - } - else file->fd = -1; - if (!*loop) - break; - } - } - return file->fd; -} - - -signed char FileMgr::existsFile(const char *ipath, const char *ifileName) -{ - int len = strlen(ipath) + ((ifileName)?strlen(ifileName):0) + 3; - char *ch; - char *path = new char [ len ]; - strcpy(path, ipath); - - if ((path[strlen(path)-1] == '\\') || (path[strlen(path)-1] == '/')) - path[strlen(path)-1] = 0; - - if (ifileName) { - ch = path + strlen(path); - sprintf(ch, "/%s", ifileName); - } - signed char retVal = !access(path, 04); - delete [] path; - return retVal; -} - - -signed char FileMgr::existsDir(const char *ipath, const char *idirName) -{ - char *ch; - int len = strlen(ipath) + ((idirName)?strlen(idirName):0) + 1; - if (idirName) - len += strlen(idirName); - char *path = new char [ len ]; - strcpy(path, ipath); - - if ((path[strlen(path)-1] == '\\') || (path[strlen(path)-1] == '/')) - path[strlen(path)-1] = 0; - - if (idirName) { - ch = path + strlen(path); - sprintf(ch, "/%s", idirName); - } - signed char retVal = !access(path, 04); - delete [] path; - return retVal; -} - - -int FileMgr::createParent(const char *pName) { - char *buf = new char [ strlen(pName) + 1 ]; - int retCode = 0; - - strcpy(buf, pName); - int end = strlen(buf) - 1; - while (end) { - if ((buf[end] == '/') || (buf[end] == '\\')) - break; - end--; - } - buf[end] = 0; - if (strlen(buf)>0) { - if (access(buf, 02)) { // not exists with write access? - if ((retCode = mkdir(buf -#ifndef WIN32 - , 0755 -#endif - ))) { - createParent(buf); - retCode = mkdir(buf -#ifndef WIN32 - , 0755 -#endif - ); - } - } - } - else retCode = -1; - delete [] buf; - return retCode; -} - - -int FileMgr::createPathAndFile(const char *fName) { - int fd; - - fd = ::open(fName, O_CREAT|O_WRONLY|O_BINARY, S_IREAD|S_IWRITE|S_IRGRP|S_IROTH); - if (fd < 1) { - createParent(fName); - fd = ::open(fName, O_CREAT|O_WRONLY|O_BINARY, S_IREAD|S_IWRITE|S_IRGRP|S_IROTH); - } - return fd; -} - - -int FileMgr::copyFile(const char *sourceFile, const char *targetFile) { - int sfd, dfd, len; - char buf[4096]; - - if ((sfd = ::open(sourceFile, O_RDONLY|O_BINARY)) < 1) - return -1; - if ((dfd = createPathAndFile(targetFile)) < 1) - return -1; - - do { - len = read(sfd, buf, 4096); - write(dfd, buf, len); - } - while(len == 4096); - ::close(dfd); - ::close(sfd); - - return 0; -} - - -int FileMgr::removeFile(const char *fName) { - return ::remove(fName); -} - - - -SWORD_NAMESPACE_END |