int execution__simple_command(t_command *c, t_env *e)
{
pid_t p;
if (!check_bultins(c, e) && !(p = fork()))
{
if (c->need_redir)
do_redirections(&c->redirs, STDIN_FILENO, STDOUT_FILENO);
start_prgm(e->environ, c->argv);
}
wait(NULL);
return (WEXITSTATUS(p));
}
/* Execute a builtin command.
*
* @builtin: Pointer to a structure describing which builtin command to
* execute.
*
* @cmd_args: List of strings for the arguments to the builtin, not
* including the name of the builtin itself.
*
* @redirs: List of redirections for the builtin.
*
* @cmd_nargs: Number of arguments that the builtin was passed, not
* including the name of the builtin itself.
*
* Return value: The return value of the builtin command function, or -1 if
* there are problems doing or undoing redirections.
*/
static int execute_builtin(const struct builtin *builtin,
const struct list_head *cmd_args,
const struct list_head *redirs,
unsigned cmd_nargs)
{
struct orig_fds orig;
const char *argv[cmd_nargs + 1];
struct string *s;
unsigned i;
int status;
int ret;
/* Do redirections for the builtin */
status = do_redirections(redirs, &orig);
if (status)
return status;
/* Prepare argv for the builtin */
for (i = 0, s = list_entry(cmd_args->next, struct string, list);
i < cmd_nargs;
i++, s = list_entry(s->list.next, struct string, list))
{
argv[i] = s->chars;
}
argv[i] = NULL;
/* Call the built-in function */
status = builtin->func(cmd_nargs, argv);
/* Undo redirections for the builtin, unless this was the 'exec' builtin */
if (builtin->func != builtin_exec) {
ret = undo_redirections(&orig);
if (ret) {
if (status == 0)
status = ret;
mysh_error_with_errno("Failed to restore redirections");
}
}
return status;
}
