Problems with making a simple UNIX shell
- by Kodemax
Hai,
I am trying to create a simple shell in UNIX. I read a lot and found that everybody uses the strtok a lot. But i want to do without any special functions. So i wrote the code but i cant seem to get it to work. Can anybody point out what i am doing wrong here?
void process(char**);
int arg_count;
char **splitcommand(char* input)
{
char temp[81][81] ,*cmdptr[40];
int k,done=0,no=0,arg_count=0;
for(int i=0 ; input[i] != '\0' ; i++)
{
k=0;
while(1)
{
if(input[i] == ' ')
{
arg_count++;
break;
}
if(input[i] == '\0')
{
arg_count++;
done = 1;
break;
}
temp[arg_count][k++] = input[i++];
}
temp[arg_count][k++] = '\0';
if(done == 1)
{
break;
}
}
for(int i=0 ; i<arg_count ; i++)
{
cmdptr[i] = temp[i];
cout<<endl;
}
cout<<endl;
}
void process(char* cmd[])
{
int pid = fork();
if(pid < 0)
{
cout << "Fork Failed" << endl;
exit(-1);
}
else if( pid == 0)
{
cout<<endl<<"in pid";
execvp(cmd[0], cmd);
}
else
{
wait(NULL);
cout << "Job's Done" << endl;
}
}
int main()
{
cout<<"Welcome to shell !!!!!!!!!!!"<<endl;
char input[81];
cin.getline(input,81);
splitcommand(input);
}
