source: mainline/uspace/lib/libc/generic/io/stream.c@ 0d5a50c

/*
 * Copyright (c) 2006 Josef Cejka
 * Copyright (c) 2006 Jakub Vana
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libc
 * @{
 */
/** @file
 */

#include <io/io.h>
#include <io/stream.h>
#include <string.h>
#include <malloc.h>
#include <libc.h>
#include <ipc/ipc.h>
#include <ipc/ns.h>
#include <ipc/fb.h>
#include <ipc/services.h>
#include <ipc/console.h>
#include <kbd/kbd.h>
#include <unistd.h>
#include <async.h>
#include <sys/types.h>

static int console_phone = -1;

ssize_t write_stderr(const void *buf, size_t count)
{
        return count;
}

ssize_t read_stdin(void *buf, size_t count)
{
        open_console();
        if (console_phone >= 0) {
                kbd_event_t ev;
                int rc;
                size_t i = 0;
        
                while (i < count) {
                        do {
                                rc = kbd_get_event(&ev);
                                if (rc < 0) return -1;
                        } while (ev.c == 0 || ev.type == KE_RELEASE);

                        ((char *) buf)[i++] = ev.c;
                }
                return i;
        } else {
                return -1;
        }
}

ssize_t write_stdout(const void *buf, size_t count)
{
        open_console();
        if (console_phone >= 0) {
                int i;
        
                for (i = 0; i < count; i++)
                        async_msg_1(console_phone, CONSOLE_PUTCHAR,
                            ((const char *) buf)[i]);
                
                return count;
        } else
                return __SYSCALL3(SYS_KLOG, 1, (sysarg_t) buf, count);
}

void open_console(void)
{
        if (console_phone < 0) {
                int phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0, 0);
                if (phone >= 0)
                        console_phone = phone;
        }
}

void close_console(void)
{
        if (console_phone >= 0) {
                if (ipc_hangup(console_phone) == 0) {
                        console_phone = -1;
                }
        }
}

void klog_update(void)
{
        (void) __SYSCALL3(SYS_KLOG, 1, NULL, 0);
}

int get_cons_phone(void)
{
        open_console();
        return console_phone;
}

/** @}
 */