OSProject/nutshell.c at main · triple3567/OSProject · 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
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "global.h"
#include <unistd.h>
#include <limits.h>

char *getcwd(char *buf, size_t size);

int main()
{
    useAlias = true;
    aliasIndex = 0;
    varIndex = 0;
    char cwd[PATH_MAX];
    getcwd(cwd, sizeof(cwd));

    strcpy(varTable.var[varIndex], "PWD");
    strcpy(varTable.word[varIndex], cwd);
    varIndex++;
    strcpy(varTable.var[varIndex], "HOME");
    strcpy(varTable.word[varIndex], cwd);
    varIndex++;
    strcpy(varTable.var[varIndex], "PROMPT");
    strcpy(varTable.word[varIndex], "nutshell");
    varIndex++;
    strcpy(varTable.var[varIndex], "PATH");
    strcpy(varTable.word[varIndex], ".:/bin");
    varIndex++;

    strcpy(aliasTable.name[aliasIndex], ".");
    strcpy(aliasTable.word[aliasIndex], cwd);
    aliasIndex++;

    char *pointer = strrchr(cwd, '/');
    while(*pointer != '\0') {
        *pointer ='\0';
        pointer++;
    }
    strcpy(aliasTable.name[aliasIndex], "..");
    strcpy(aliasTable.word[aliasIndex], cwd);
    aliasIndex++;
    system("clear");
	printf("Welcome to the Nutshell by Marcus Elosegui and Eric Ho\n");

    while(1){
        printf("[%s]>> ", varTable.word[0]);
        yyparse();
    }

    return 0;
}