#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <sys/ksys.h>
#include "_exit.h"

int system(const char* command)
{

    const char shell[] = "/sys/shell";
    if (command == NULL || *command == '\0') {
        FILE* f = fopen(shell, "r");
        if (f) {
            fclose(f);
        }

        return f != 0;
    }

    FILE* f = tmpfile();
    if (!f)
        return -1;

    fputs("#SHS\n", f);
    fputs(command, f);
    fputs("\nexit\n", f);

    int pid = _ksys_exec(shell, f->name);

    fclose(f);

    if (pid < 0) {
        return -1;
    }

    // wait of end of shell

    ksys_thread_t t;
    while (_ksys_thread_info(&t, pid) != -1 && t.slot_state != 3 && t.slot_state != 4 && t.slot_state != 9) {
        _ksys_thread_yield();
    }

    return READ_EXIT_CODE(pid, &t);
}