pish/src/Pish.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include <string.h>
#include "Integrated.h"
#include "Pish.h"

// Main function for Pish program
void Pish(void)
{
    CommandStruct commandObject = {"", 0};
    CommandStruct* command = &commandObject;
    char inputString[1000]; // Max 1000 characters
    int forkPID;
    ReadPishrc(command, inputString);
    while (1)
    {
        ResetCommandStruct(command); // Clean command
        memset(inputString, 0, sizeof(inputString)); // Clean inputString
        GetInput(inputString);
        ParseInput(inputString, command);
	    IntegratedCheck(command->argv[0]);
        forkPID = fork();
        // Child
        if (forkPID == 0)
        {
            // This is the child process
            // Setup the child's process environment here
            // E.g., where is standard I/O, how to handle signals?
            // execve() is recommended, execvpe() may be better
            execvp(command->argv[0], command->argv);
            // exec does not return if it succeeds
            printf("ERROR: Could not execute %s\n", inputString);
            exit(1);
        }
        // Parent
        // This is the parent process; Wait for the child to finish
        // Removed due to potentially useless
        // int pid = forkPID;
        // wait(&pid);
        wait(&forkPID);
        // TODO: Remove break when while loop doesn't break program
        // break;
    }
}

// Prints a prompt and then reads a command from the terminal
void GetInput(char* inputString)
{
    char* prompt = "pish%>";
    printf("%s ", prompt);
    scanf("%[^\n]", inputString);
    return;
}

// Splits a string separated by spaces into an array of strings
void ParseInput(char* inputString, CommandStruct* command)
{
    //Parse command
    int* argc = &(command->argc);
	char* token = strtok(inputString, " ");
    command->argv[*argc] = token;
    (*argc)++;
	while (token != NULL)
    {
	    //This only holds 1 command at a time then it overrides
	    //Will need modified
	    token = strtok(NULL, " ");
        command->argv[*argc] = token;
        (*argc)++;
	}
}