void
execute_command (command_t c)
{
switch(c->type)
{
case SIMPLE_COMMAND:
execute_simple(c);
break;
case AND_COMMAND:
execute_and_command(c);
break;
case OR_COMMAND:
execute_or_command(c);
break;
case PIPE_COMMAND:
execute_pipe_command(c);
break;
case SUBSHELL_COMMAND:
execute_subshell_command(c);
break;
case SEQUENCE_COMMAND:
execute_sequence_command(c);
break;
default:
error(1, 0, "Invalid command type");
}
}
int
execute_command (command_t c, bool a)
{
if (!a) {
switch(c->type){
case AND_COMMAND:
return execute_and_command(c);
break;
case OR_COMMAND:
return execute_or_command(c);
break;
case SEQUENCE_COMMAND:
return execute_sequence_command(c);
break;
case PIPE_COMMAND:
return execute_pipe_command(c);
break;
case SIMPLE_COMMAND:
return execute_simple_command(c);
break;
case SUBSHELL_COMMAND:
return execute_command(c->u.subshell_command, 0);
break;
}
}
}
void
execute_command (command_t c, int time_travel)
{
/* FIXME: Replace this with your implementation. You may need to
add auxiliary functions and otherwise modify the source code.
You can also use external functions defined in the GNU C Library. */
if(c == NULL)
return;
if(time_travel ==1)
execute_time_travel(c);
else
{
switch(c->type)
{
case SIMPLE_COMMAND:
execute_simple_command(c);
break;
case AND_COMMAND:
execute_and_command(c);
break;
case OR_COMMAND:
execute_or_command(c);
break;
case PIPE_COMMAND:
execute_pipe_command(c);
break;
case SUBSHELL_COMMAND:
execute_subshell_command(c);
break;
case SEQUENCE_COMMAND:
execute_sequence_command(c);
break;
case WHILE_COMMAND:
execute_while_command(c);
break;
case FOR_COMMAND:
execute_for_command(c);
break;
case UNTIL_COMMAND:
execute_until_command(c);
break;
case IF_COMMAND:
execute_if_command(c);
break;
case NOT_COMMAND:
execute_not_command(c);
break;
default:
error(1,0, "Error: Unknown command!");
break;
}
//error (1, 0, "command execution not yet implemented");
}
}
void execute_wrapper(command_t c)
{
switch(c->type){
case (SIMPLE_COMMAND):
execute_simple_command(c);
break;
case (AND_COMMAND):
case (OR_COMMAND):
execute_and_or_command(c);
break;
case (SEQUENCE_COMMAND):
execute_sequence_command(c);
break;
case (PIPE_COMMAND):
execute_pipe_command(c);
break;
case (SUBSHELL_COMMAND):
execute_subshell_command(c);
break;
}
}
void
execute_command (command_t c, int time_travel)
{
/* FIXME: Replace this with your implementation. You may need to
add auxiliary functions and otherwise modify the source code.
You can also use external functions defined in the GNU C Library. */
if(c == NULL)
return;
//printf("Enter%d\n", c->type);
if (!time_travel)
{
switch(c->type)
{
case SIMPLE_COMMAND:
execute_simple_command(c);
break;
case AND_COMMAND:
execute_and_command(c);
break;
case OR_COMMAND:
execute_or_command(c);
break;
case PIPE_COMMAND:
execute_pipe_command(c);
break;
case SEQUENCE_COMMAND:
execute_sequence_command(c);
break;
case SUBSHELL_COMMAND:
execute_subshell_command(c);
break;
default:
error(1, 0, "Incorrect Command Type");
}
}
}
