shell.c

#include <stdio.h>  // printf, perror
#include <unistd.h> // getcwd
#include <stdlib.h> // malloc
#include <string.h> // strcat, strcpy
#include "shell.h"  // display_prompt
#include <wait.h>
#include <signal.h>

char HOME_DIR[1024];

void set_home_dir()
{

    // path to the executable : readlink to read the symbolic link /proc/pid/exe
    char path[1024] = "/proc/\0", temp[64];

    snprintf(temp, 63, "%d", getpid());

    strcat(path, temp);
    strcat(path, "/exe");

    if ((readlink(path, HOME_DIR, 1023)) < 0)
    {
        perror("");
        HOME_DIR[0] = '/';
        HOME_DIR[1] = '\0'; //default
    }
    if (strlen(HOME_DIR) > 5)
        HOME_DIR[strlen(HOME_DIR) - 6] = '\0'; // HARDCODED :: EXECUTABLE NAME IS "/SHELL" SO IT IS REMOVED
}

int main()
{ // to do : check for possible memory leaks with valgrind

    set_home_dir();
    
    parse_commands();
}