Shell-Development-Project/main.cpp at mycode · Shell-Development-Project/Shell-Development-Project · GitHub

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/*input

///-------------------------------------------------------------------------------------

AUTHOR: Akash Agarwal

1405231007-Computer Science Department

IET LUCKNOW

LIFE MOTTO: while(!(suceed=try()))

///--------------------------------------------------------------------------------------

//Predefined #INCLUDES

#include <iostream>

#include <vector>

#include <string>

#include <algorithm>

#include <stdio.h>

#include <string.h>

#include <math.h>

#include <stdlib.h>

#include <unistd.h>

#include <readline/readline.h>

#include <readline/history.h>

#include <boost/filesystem.hpp>

#include <boost/algorithm/string/replace.hpp>

//User Defined #INCLUDES

#include "lexical.h"

// #include "termcolor.hpp"

using namespace std;

ANSI colour codes.

**Note that not all terminals support this; if colour sequences are not supported, garbage will show up.**

Example:

cout << "\033[1;31mbold red text\033[0m\n";

Here, \033 is the ESC character, ASCII 27. It is followed by [, then zero or more numbers separated by ;,

and finally the letter m. The numbers describe the colour and format to switch to from that point onwards.

The codes for foreground and background colours are:

____________________________________

foreground background

black 30 40

red 31 41

green 32 42

yellow 33 43

blue 34 44

magenta 35 45

cyan 36 46

white 37 47

_____________________________________

Additionally, we can use these:

_________________________________________________________________

reset 0 (everything back to normal)

bold/bright 1 (often a brighter shade of the same colour)

underline 4

inverse 7 (swap foreground and background colours)

bold/bright off 21

underline off 24

inverse off 27

__________________________________________________________________

See the table on Wikipedia for other, less widely supported codes.

#define ANSI_COLOR_RED "\x1B[1;31m"

#define ANSI_COLOR_YELLOW "\x1B[1;33m"

#define ANSI_COLOR_BLUE "\x1B[1;34m"

#define ANSI_COLOR_RESET "\x1B[1;0m"

#define ANSI_COLOR_WHITE "\x1B[37m"

#define ANSI_COLOR_GREEN "\x1B[1;32m"

int main()

{

string pathtoHome, username, hostname;

username = string(getenv("USER")); // If compiler is showing error: "basic_string::_M_construct null not valid"

// that means Ubuntu isn't exporting the variable like it should,

// put "export HOSTNAME" in "/etc/bash.bashrc" and the code works.

hostname = string(getenv("HOSTNAME")); // it will export both the username and the hostname.

pathtoHome = "/home/" + username;

chdir (pathtoHome.c_str());

static char* line_read = (char *) NULL;

while(true)

{

string prompt = "\n"

username

// +

// ANSI_COLOR_RED

"@"

// +

// ANSI_COLOR_GREEN

hostname

// +

// ANSI_COLOR_YELLOW

":"

// +

// ANSI_COLOR_BLUE

boost::algorithm::replace_all_copy(boost::filesystem::current_path().string(), pathtoHome, "~")

// +

// ANSI_COLOR_RESET

"!>> ";

line_read = readline (prompt.c_str());

if (! line_read || strcmp(line_read,"exit") == 0)

{

cout << endl;

break;

}

/* If the line has any text in it, save it on the history. */

if (line_read && *line_read)

add_history (line_read);

try

{

string cmd(line_read);

cmdSyntaxAnalysis(cmd);

}

catch (const std::exception& e)

{

cout << e.what() << "\n";

}

return 0;

}

// /* A static variable for holding the line. */

// static char *line_read = (char *)NULL;

// /* Read a string, and return a pointer to it. Returns NULL on EOF. */

// char *

// rl_gets ()

// {

// /* If the buffer has already been allocated, return the memory

// to the free pool. */

// if (line_read)

// {

// free (line_read);

// line_read = (char *)NULL;

// }

// /* Get a line from the user. */

// line_read = readline ("");

// /* If the line has any text in it, save it on the history. */

// if (line_read && *line_read)

// add_history (line_read);

// return (line_read);

// }

Shell-Development-Project/main.cpp at mycode · Shell-Development-Project/Shell-Development-Project · GitHub

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