pish/src/Integrated.c

#include <assert.h>
#include <fcntl.h>
#include <pwd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "Integrated.h"

// Gets home directory location of user
const char* GetHomeDir(void)
{
    char* homeDir = (getpwuid(getuid()))->pw_dir;
    strcat(homeDir, "/.pishrc");
    return homeDir;
}


// Checks for commands that are built into Pish
void IntegratedCheck(CommandStruct* command)
{
    if (strcmp(command->argv[0], "exit") == 0)
        exit(0);
    // If there is an argument, change to argument location
    // Else, change to home directory
    if (command->argv[0][0] == 'c' && command->argv[0][1] == 'd')
        ;
    return;
}


// Prints a prompt and then reads a command from the terminal
void GetInput(char* inputString)
{
    char c;
    char* prompt = "pish%>";
    printf("%s ", prompt);
    // assert(scanf("%[^\n]s", inputString) == 1);
    scanf("%1000[^\n]s", inputString);
    while((c = getchar()) != '\n' && c != EOF)
		/* discard */ ;
    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)++;
	}
}

// Reads ~/.pishrc and runs each command in the file
void ReadPishrc(CommandStruct* command, char* inputString)
{
    char buffer[1];
    int forkID;
    int* argc = &(command->argc);
    int fd = open(GetHomeDir(), O_RDONLY | O_CREAT);
    assert(fd > -1);
    while (read(fd, buffer, 1) > 0)
    {
        if (buffer[0] == '\n')
        {
            ParseInput(inputString, command);
            forkID = fork();
            if (forkID == 0)
                execvp(command->argv[0], command->argv);
            else
                wait(&forkID);
            strcpy(inputString, "");
            ResetCommandStruct(command);
            continue;
        }
        strcat(inputString, buffer);
    }
    assert(close(fd) >= 0);
}