miniShell/commandUtils.cpp at main · Noobmaster-IIIT/miniShell · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
#include <vector>
#include <string>
#include<termios.h>
#include <iomanip>
#include <sys/wait.h>
#include <unistd.h>
#include <fcntl.h>
#include<iostream>
#include"Commands.h"
#include <vector>
#include <string>
#include"Shell.h"
#include"commandUtils.h"


void handleIndirections(std::vector<std::string> &args, int &in_fd, int &out_fd, int &append_fd) {
    for (size_t i = 0; i < args.size(); ++i) {
        if (args[i] == ">") {
            out_fd = open(args[i + 1].c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0644);
            if (out_fd < 0) {
                perror("open");
            }
            dup2(out_fd, STDOUT_FILENO);
            close(out_fd);
            args.erase(args.begin() + i, args.begin() + i + 2);
            i--; // Adjust the loop after erasing
        } else if (args[i] == ">>") {
            append_fd = open(args[i + 1].c_str(), O_WRONLY | O_CREAT | O_APPEND, 0644);
            if (append_fd < 0) {
                perror("open");
            }
            dup2(append_fd, STDOUT_FILENO);
            close(append_fd);
            args.erase(args.begin() + i, args.begin() + i + 2);
            i--; // Adjust the loop after erasing
        } else if (args[i] == "<") {
            in_fd = open(args[i + 1].c_str(), O_RDONLY);
            if (in_fd < 0) {
                perror("open");
            }
            dup2(in_fd, STDIN_FILENO);
            close(in_fd);
            args.erase(args.begin() + i, args.begin() + i + 2);
            i--; // Adjust the loop after erasing
        }
    }
}


    std::string getLocalHome() {
        char cwd[1000];
        if (getcwd(cwd, sizeof(cwd)) != nullptr) {
            return std::string(cwd);
        }
        return "";
    }

        std::string getCurrentDirectory() {
        char cwd[1000];
        if (getcwd(cwd, sizeof(cwd)) != nullptr) {
            return std::string(cwd);
        }
        return getLocalHome();
    }

    void enableRawMode(termios &orig_termios) {
        termios raw = orig_termios;
        raw.c_lflag &= ~(ECHO | ICANON | ISIG);
        raw.c_cc[VMIN] = 1;
        raw.c_cc[VTIME] = 0;
        tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw);
    }

    void disableRawMode(termios &orig_termios) {
        tcsetattr(STDIN_FILENO, TCSAFLUSH, &orig_termios);
    }


 std::vector<std::string> tokenize(std::string& input){
    std::vector<std::string> tokens;
    std::string token;
    bool insideQuotes = false;
    char quote = '\0';  // To track which type of quotes are being used

    for (size_t i = 0; i <input.size(); ++i) {
        char c = input[i];

        if (c == '"' || c == '\'') {
            if (insideQuotes && c == quote) {
                insideQuotes = false;
                quote = '\0';
            } else if (!insideQuotes) {
                insideQuotes = true;
                quote = c;
            }
        }

        if (c == '|' || c == ';' || c == '<' || c == '>'||c=='&') {
            if (!insideQuotes) {
                if (!token.empty()) {
                    tokens.push_back(token);
                    token.clear();
                }

                // Handle the `<<` case
                if (c == '<' && i + 1 < input.size() && input[i + 1] == '<') {
                    tokens.push_back("<<");
                    ++i;  // Skip the next character since it's part of the `<<` token
                }
                // Handle the `>>` case
                else if (c == '>' && i + 1 < input.size() && input[i + 1] == '>') {
                    tokens.push_back(">>");
                    ++i;  // Skip the next character since it's part of the `>>` token
                } else {
                    tokens.push_back(std::string(1, c));
                }
            } else {
                token += c;
            }
        } else if(!insideQuotes && c==' '){

              if(!token.empty()){ tokens.push_back(token);token.erase();}
        }

        else token += c;

    }

    if (!token.empty()) {
        tokens.push_back(token);
    }


    return tokens;
}