kosh.c

/*
 * kosh.c - console shell for kallistios (A Rough version)
 *
 * (C) 2000 Jordan DeLong
 */

#include <stdio.h>
#include <assert.h>
#include <kos/thread.h>
#include "kosh.h"
#include "chdir.h"
#include "builtin.h"

/* global exit flag:  if someone sets this we quit */
#define KE_YES      1   // Requesting exit
#define KE_NO       0   // Run mode
#define KE_QUITTING -1  // Thread has returned
#define KE_JOINED   -2  // Not running
volatile int kosh_exit = KE_JOINED;

/* Our exit semaphore - signaled when the thread exits */
static kthread_t *thd;

static void *kosh_thread(void *p) {
    conio_printf("  **** KOSH, The KallistiOS Shell ****\n");
    kosh_chdir("/");
    while (kosh_exit == KE_NO)
        input_oneloop();
    conio_printf("Kosh is done\n");
    kosh_exit = KE_QUITTING;

    return NULL;
}

void kosh_join(void) {
    assert( kosh_exit != KE_JOINED );
    thd_join(thd, NULL);
    kosh_exit = KE_JOINED;
}

int kosh_init(void) {
    if (kosh_exit != KE_JOINED)
        return -1;

    kosh_exit = KE_NO;
    kosh_builtins_init();
    thd = thd_create(0, kosh_thread, NULL);
    return 0;
}

void kosh_shutdown(void) {
    if (kosh_exit != KE_JOINED) {
        kosh_exit = KE_YES;
        kosh_join();
    }
    kosh_builtins_shutdown();
}