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typescript
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Script started on Wed 15 Mar 2023 10:21:08 PM EDT
]0;pangilinan_ee@cobra:~/CSC310/jtar[?1034h[pangilinan_ee@cobra jtar]$ cat jtar.cpp
/*
Ervin Pangilinan
CSC 310: File Structures & Advanced Algorithms - Spring 2023
Project 2: The jtar Software
Implementation in C++
*/
#include <iostream>
#include <string>
#include <cstdlib>
#include <sys/stat.h>
#include <sys/types.h>
#include <utime.h>
#include <fstream>
#include <vector>
#include <map>
#include <sstream>
#include "file.h"
using namespace std;
// For initial command line parsing.
enum VERIFY {CF, TF, XF, HELP, NONE};
int parseArgs(char* argv[]);
// For "--help" flag.
void helpMessage();
// For "-cf" flag.
void makeTarFile(int argc, char* argv[]);
char* createFileName(string fileName);
char* createProtectionMode(string fileName);
char* createTimestamp(string fileName);
char* createFileSize(string fileName);
bool isDirectory(string fileName);
void obtainFiles(int argc, char* argv[], vector<string> &listing);
void setUpFiles(const vector<string> &listing, vector<File> &tarTheseFiles);
void build(vector<File> &tarTheseFiles, char* tarName);
// For "-tf" flag.
void listContents(char* tarredFile);
// For "-xf" flag.
void untar(char* tarredFile);
int main(int argc, char* argv[]) {
// PRE: Command-line arguments are used to specify how jtar will operate.
// POST: Executes based on the flags passed on command line.
switch (parseArgs(argv)) {
case CF:
makeTarFile(argc, argv);
break;
case TF:
listContents(argv[2]);
break;
case XF:
untar(argv[2]);
break;
case HELP:
helpMessage();
break;
case NONE:
cerr << "jtar: You must specify one of the options" << endl;
cerr << "Try 'jtar --help' for more information." << endl;
break;
}
return 0;
}
int parseArgs(char* argv[]) {
// PRE: Flags are passed on the command line.
// POST: Returns an integer determining which command should be executed.
string flag(argv[1]);
if (flag == "-cf") {
return CF;
} else if (flag == "-tf") {
return TF;
} else if (flag == "-xf") {
return XF;
} else if (flag == "--help") {
return HELP;
} else {
return NONE;
}
}
void helpMessage() {
// PRE: "--help" was passed on the command line.
// POST: Outputs the help message for jtar.
cout << "'jtar' saves many files together into a single tape or disk archive, and" << endl;
cout << "can restore individual files from the archive." << endl;
cout << "\nUsage: tar [OPTION]... [FILE]..." << endl;
cout << "\nOption Examples:" << endl;
cout << "\ttar -cf archive.tar foo bar\t# Create archive.tar from files foo and bar." << endl;
cout << "\ttar -tf archive.tar\t\t# List all files in archive.tar verbosely." << endl;
cout << "\ttar -xf archive.tar\t\t# Extract all files from archive.tar." << endl;
cout << "Report bugs to <11013518@live.mercer.edu>.\n" << endl;
}
void makeTarFile(int argc, char* argv[]) {
// PRE: "-cf" flag was passed onto the command line.
// POST: Makes a tar file with the passed arguments.
map<string, int> files;
vector<string> listing;
vector<File> tarredFiles;
if (argc >= 4) {
// Step 1: Verify that valid files and directories were passed onto the command line.
struct stat buf;
struct utimbuf timebuf;
for (int i = 3; i < argc; i++) {
lstat(argv[i], &buf);
string name(argv[i]);
fstream temp(argv[i], ios::in);
if (!S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode) && !temp) {
cerr << "jtar: '" << argv[i] << "' does not exist" << endl;
return;
}
}
// Step 2: Obtain all of the files and directories to be placed into the tar file.
obtainFiles(argc, argv, listing);
// Step 3: Fill the vector of File objects.
setUpFiles(listing, tarredFiles);
// Step 4: Build the actual tar file.
build(tarredFiles, argv[2]);
} else {
cerr << "jtar: Invalid format" << endl;
cerr << "Try 'jtar --help for more information" << endl;
}
}
char* createFileName(string fileName) {
// PRE: String containing file name is passed in.
// POST: Returns a char array containing the file name.
char *name = new char[81];
strcpy(name, fileName.c_str());
return name;
}
char* createProtectionMode(string fileName) {
// PRE: String containing file name is passed in.
// POST: Returns a char array containing the protection mode of file.
struct stat buf;
char* pmode = new char[5];
lstat(fileName.c_str(), &buf);
string fileProtect = to_string(((buf.st_mode & S_IRWXU) >> 6))
+ to_string((buf.st_mode & S_IRWXG) >> 3)
+ to_string(buf.st_mode & S_IRWXO);
strcpy(pmode, fileProtect.c_str());
return pmode;
}
char* createTimestamp(string fileName) {
// PRE: String containing file name is passed in.
// POST: Returns a char array containing the timestamp of the file.
struct stat buf;
char* timestamp = new char[16];
lstat(fileName.c_str(), &buf);
strftime(timestamp, 16, "%Y%m%d%H%M.%S", localtime(&buf.st_mtime));
return timestamp;
}
char* createFileSize(string fileName) {
// PRE: String containing file name is passed in.
// POST: Returns a char array containing the file size.
struct stat buf;
char *size = new char[7];
lstat(fileName.c_str(), &buf);
string fileSize = to_string(buf.st_size);
strcpy(size, fileSize.c_str());
return size;
}
bool isDirectory(string fileName) {
// PRE: String containing file name is passed in.
// POST: Returns an boolean determining if the file is a directory or not
struct stat buf;
lstat(fileName.c_str(), &buf);
if (S_ISDIR(buf.st_mode)) return true;
else return false;
}
void obtainFiles(int argc, char* argv[], vector<string> &listing) {
// PRE: Command line arguments contain valid file and directory names.
// POST: Obtains all files and subdirectories in current directory.
string name;
struct stat buf;
for (int i = 3; i < argc; i++) {
name = argv[i];
if (isDirectory(name)) {
// Add directory name to vector.
listing.push_back(name);
string command = "ls " + string(name) + " -1R > listOutput";
// Make a file containing a list of files in directory name.
system(command.c_str());
fstream list("listOutput", ios::in);
list.seekg(0, ios::beg);
// Go through that file to add the other files.
string fromList;
string path = "";
list >> fromList;
while (!list.eof()) {
if (fromList[fromList.length() - 1] == ':') {
path = fromList.substr(0, fromList.length() - 1);
} else {
listing.push_back(path + "/" + fromList);
}
list >> fromList;
}
system("rm listOutput");
} else {
listing.push_back(name);
}
}
}
void setUpFiles(const vector<string> &listing, vector<File> &tarTheseFiles) {
// PRE: Vector of filename strings is non-empty.
// POST: Fills a new vector of File objects.
for (string filename : listing) {
if (isDirectory(filename)) {
File tarredFile(createFileName(filename), createProtectionMode(filename),
createFileSize(filename), createTimestamp(filename));
tarredFile.flagAsDir();
tarTheseFiles.push_back(tarredFile);
} else {
File tarredFile(createFileName(filename), createProtectionMode(filename),
createFileSize(filename), createTimestamp(filename));
tarTheseFiles.push_back(tarredFile);
}
}
}
void build(vector<File> &tarTheseFiles, char* tarName) {
// PRE: Vector of File objects is filled.
// POST: Creates a tar file from the vector of File objects.
fstream tarFile(tarName, ios::out | ios::binary);
struct stat buf;
// Write out the size of the tar file.
unsigned long tarSize = 0;
for (int i = 0; i < tarTheseFiles.size(); i++) {
lstat(tarTheseFiles[i].getName().c_str(), &buf);
if (S_ISDIR(buf.st_mode)) {
tarSize += sizeof(File);
} else {
tarSize += (sizeof(File) + (unsigned long) stoi(tarTheseFiles[i].getSize()));
}
}
tarFile.write((char*) &tarSize, sizeof(unsigned long));
// Write out the contents of each file.
for (int i = 0; i < tarTheseFiles.size(); i++) {
File temp(tarTheseFiles[i]);
lstat(temp.getName().c_str(), &buf);
if (S_ISDIR(buf.st_mode)) {
tarFile.write((char*) &temp, sizeof(File));
} else {
char ch;
tarFile.write((char*) &temp, sizeof(File));
fstream textContents(temp.getName(), ios::in);
textContents.seekg(0, ios::beg);
while (textContents.get(ch)) {
tarFile.put(ch);
}
textContents.close();
}
}
tarFile.close();
}
void listContents(char* tarredFile) {
// PRE: Valid tar file was passed onto the command line.
// POST: Lists all files and directories that were written into the tar file.
struct stat buf;
lstat(tarredFile, &buf);
if (!S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)) {
cerr << "jtar: '" << tarredFile << "' does not exist" << endl;
} else {
File temp;
unsigned long size;
fstream tarFile(tarredFile, ios::in | ios::binary);
tarFile.read((char*) &size, sizeof(unsigned long));
while (tarFile.read((char*) &temp, sizeof(File)) && tarFile.good()) {
if (temp.isADir()) {
cout << temp.getName() << endl;
} else {
cout << temp.getName() << endl;
tarFile.seekg(stoi(temp.getSize()), ios::cur);
}
}
tarFile.close();
}
}
void untar(char* tarredFile) {
// PRE: "-xf" is passed onto the command line, followed by the tar file name.
// POST: Extracts all files contained in the tar file.
char ch;
File temp;
string command;
string chmod;
unsigned long size;
struct stat buf;
fstream tarFile(tarredFile, ios::in | ios::binary);
tarFile.read((char*) &size, sizeof(unsigned long));
while (tarFile.read((char*) &temp, sizeof(File)) && tarFile.good()) {
fstream checkIfExists(temp.getName(), ios::in);
lstat(temp.getName().c_str(), &buf);
if (temp.isADir() && !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode) && !checkIfExists) {
command = "mkdir " + temp.getName();
system(command.c_str());
} else if (temp.isADir()) {
command = "cd " + temp.getName();
system(command.c_str());
} else {
fstream outputFile(temp.getName(), ios::out);
while (tarFile.get(ch) && outputFile.tellp() < (unsigned long) (stoi(temp.getSize()) - 1)) {
outputFile.put(ch);
}
outputFile.close();
command = "chmod " + temp.getPmode() + " ./" + temp.getName();
system(command.c_str());
command = "touch -t " + temp.getStamp() + " ./" + temp.getName();
system(command.c_str());
}
}
}
]0;pangilinan_ee@cobra:~/CSC310/jtar[pangilinan_ee@cobra jtar]$ cat file.h
using namespace std;
#include <string>
#include <cstring>
#include <fstream>
#include <iostream>
#include <cstdlib>
#include <cstdio>
class File
{
public :
File (const File& otherFile);
File (const char name[], const char pmode[],
const char size[], const char stamp[]);
File ();
File & operator = (const File& otherFile);
string getSize() const;
string getName() const;
string getPmode() const;
string getStamp() const;
int recordSize() const;
void flagAsDir();
bool isADir() const;
private :
char name[81], pmode[5], size[7], stamp[16];
bool ADir;
};
]0;pangilinan_ee@cobra:~/CSC310/jtar[pangilinan_ee@cobra jtar]$ cat file.cpp
#include "file.h"
bool File::isADir() const
{
return ADir;
}
void File::flagAsDir()
{
ADir = true;
}
int File::recordSize() const
{
return (strlen(name)+strlen(pmode)+strlen(size)+strlen(stamp));
}
string File::getName() const
{
return name;
}
string File::getPmode() const
{
return pmode;
}
string File::getStamp() const
{
return stamp;
}
string File::getSize() const
{
return size;
}
File::File ()
{
strcpy (name, "\0"); strcpy (pmode, "\0");
strcpy (size, "\0"); strcpy (stamp, "\0");
ADir = false;
}
File::File (const char myName[], const char myPmode[],
const char mySize[], const char myStamp[])
{
strcpy (name, myName); strcpy (pmode, myPmode);
strcpy (size, mySize); strcpy (stamp, myStamp);
ADir = false;
}
File & File::operator = (const File& otherFile)
{
strcpy (name, otherFile.name);
strcpy (pmode, otherFile.pmode);
strcpy (size, otherFile.size);
strcpy (stamp, otherFile.stamp);
ADir = otherFile.ADir;
return *this;
}
File::File (const File& otherFile)
{
strcpy (name, otherFile.name);
strcpy (pmode, otherFile.pmode);
strcpy (size, otherFile.size);
strcpy (stamp, otherFile.stamp);
ADir = otherFile.ADir;
}
]0;pangilinan_ee@cobra:~/CSC310/jtar[pangilinan_ee@cobra jtar]$ c++ jtar.cpp file.o -[K[K[K[K[K[K[K[K[K[K[K[K[K[K[K[K[K[K[K[K[Kcat file.cpp[2Phjtar.cpp[7Plearls dirA -la[5P-la[K./test -xf testDrive[12Prm file43dirA -Rrls[K -la[K./test -xf testDriveclear[Kls -la./test -xf testDriveclear[Kls -la./test -xf testDriveclear[K[3Plsclear./test -xf testDriveclear[K[3Plsclearls -la[K./jtar -xf testBallls[Kclearls -la[K./test -xf testDriveclear[Krm file43dirA -Rrls[Kclearls -la./test -xf testDrivels[Krm file43dirA -Rrls[Kcleard fake[2P..ls dirA/dirB -la[5P -la[5P-la[K./test -xf testDrive[12Prm file43dirA -Rrls[Kclear[3Plsclearls -la./test -xf testDrivels[Krm file43dirA -Rrls[Kclearls -la[K./test -xf testDrivels[Kclearrm file43dirA -Rr[1P-Rr[4Pls -la[K./test -xf testBall2clear[Krm file43dirA -rRls[Kclearls -la[K./test -xf testBall2clear[Kls -la[Kclearrm file43dirA -rRls[Kclearls -la./test -xf testBall2ls[Kclearrm file43dirA -Rr[Kls[Kclear./test -tf testBall2[13Prm ball./test -cf testBall2 dirA file3 file4[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[Cls[Kclearls -la[Kclearls dirA -la[6Pclear[3Pls -la[1Pclear[3Pls./test -cf testBall2 dirA file3 file4[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[Cls[Kclearls -la[Kclearls dirA -la[5P-la./jtar -xf testBall[11Prm file43dirA -Rr[5Pls -la./jtar -cf testBall dirA file3 file4[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[Cls[Kclearls -la[Kclearls -la[1Pclear./test -xf ball[10Pclear./test -xf ball[10Pclearls -la[K./test -xf ballls[Kclearrm file43dirA -Rrls[Kclearls -la./test -xf ball[10Pclearrm file43dirA -Rrls[Kclear./test -xf ball[10Pclearls -la./test -xf ball[7Prm file43dirA -Rr./test -cf ball dirA file3 file4[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[4Ptouch -t 2303140630.15[C[C[C[C[C[C3[1PdirAls[Kclearls -la[Kclear./test -tf ballcf ball dirA file3 file4[13Pjtar -tf testBallcf testBall dirA file3 file4[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[Cls[Kclear./jtar -tf ball[10Pclear[3Pls./test -xf ballls[Kclearrm file43dirA -rRls[Kclear./test -cf ball dirA file3 file4[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[Cclear[K./test -cf ball dirA file3 file4[4P[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[Cls[K./jtar -xf dir1[9Pls -la[K./jtar -cf dir1 dirA file3 file4[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[C[Cls[Kcleard fakels[Kcd ..ls -la dirA/dirB[K[6Pclearls -la dir1[6Pclearls -la[1Pclearls -1R./test -xf testDriveclear[K./test -xf testDriveclear[K./test -xf testDriveclear[K[3Plsclear./test -xf testDrive[K[K[K[K[K[K[K[K[K[K[K[K[K[K[K[K[K[K[K[Kc++ jtar.cpp file.o -o jtar
]0;pangilinan_ee@cobra:~/CSC310/jtar[pangilinan_ee@cobra jtar]$ ./jtar -xf testTar[K[K[K[K[K[K[K[K[K[Kcf testTar dirA file3 file4
]0;pangilinan_ee@cobra:~/CSC310/jtar[pangilinan_ee@cobra jtar]$ ./jtar -tf testTar
dirA
dirA/dirB
dirA/file2
dirA/dirB/file1
file3
file4
]0;pangilinan_ee@cobra:~/CSC310/jtar[pangilinan_ee@cobra jtar]$ ./jtar -xf testTar
]0;pangilinan_ee@cobra:~/CSC310/jtar[pangilinan_ee@cobra jtar]$ ls -la
total 172
drwxrwxr-x. 4 pangilinan_ee pangilinan_ee 235 Mar 15 22:23 [0m[38;5;27m.[0m
drwxrwxr-x. 8 pangilinan_ee pangilinan_ee 79 Mar 3 13:51 [38;5;27m..[0m
drwxrwxr-x. 3 pangilinan_ee pangilinan_ee 31 Mar 15 22:20 [38;5;27mdirA[0m
-rw-rw-r--. 1 pangilinan_ee pangilinan_ee 14 Mar 15 22:20 file3
-rw-rw-r--. 1 pangilinan_ee pangilinan_ee 14 Mar 15 22:20 file4
-rw-rw-r--. 1 pangilinan_ee pangilinan_ee 1283 Mar 3 11:43 file.cpp
-rw-rw-r--. 1 pangilinan_ee pangilinan_ee 665 Mar 13 18:47 file.h
-rw-rw-r--. 1 pangilinan_ee pangilinan_ee 5216 Mar 13 18:50 file.o
drwxrwxr-x. 8 pangilinan_ee pangilinan_ee 220 Mar 15 21:27 [38;5;27m.git[0m
-rw-rw-r--. 1 pangilinan_ee pangilinan_ee 428 Feb 22 17:30 help
-rwxrwxr-x. 1 pangilinan_ee pangilinan_ee 81456 Mar 15 22:23 [38;5;34mjtar[0m
-rw-rw-r--. 1 pangilinan_ee pangilinan_ee 11639 Mar 15 21:32 jtar.cpp
-rw-rw-r--. 1 pangilinan_ee pangilinan_ee 4092 Mar 15 22:19 README
-rw-rw-r--. 1 pangilinan_ee pangilinan_ee 6209 Feb 22 17:29 README.md
-rw-rw-r--. 1 pangilinan_ee pangilinan_ee 728 Mar 15 22:23 testTar
-rw-rw-r--. 1 pangilinan_ee pangilinan_ee 16384 Mar 15 22:22 typescript
-rwxrwxr-x. 1 pangilinan_ee pangilinan_ee 13192 Mar 11 11:13 [38;5;34mutil[0m
-rw-rw-r--. 1 pangilinan_ee pangilinan_ee 1176 Feb 22 17:30 utility.cpp
]0;pangilinan_ee@cobra:~/CSC310/jtar[pangilinan_ee@cobra jtar]$ exit
exit
Script done on Wed 15 Mar 2023 10:24:39 PM EDT