scoutos / prex-0.9.0 / usr / lib / libsa / _stdio.c @ 03e9c04a
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/*
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* Copyright (c) 2005-2006, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/prex.h> |
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extern void (*__cleanup)(void); /* in exit() */ |
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void __console_write(char *, size_t); |
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char __console_read(void); |
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static device_t __console_dev;
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static int init_done = 0; |
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static void |
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__stdio_exit(void)
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{ |
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if (__console_dev)
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device_close(__console_dev); |
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init_done = 0;
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} |
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static void |
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__stdio_init(void)
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{ |
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device_open("tty", 0, &__console_dev); |
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__cleanup = __stdio_exit; |
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init_done = 1;
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} |
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void
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__console_write(char *buf, size_t len)
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{ |
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if (init_done == 0) |
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__stdio_init(); |
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device_write(__console_dev, buf, &len, 0);
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} |
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char
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__console_read(void)
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{ |
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char ch;
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size_t len = 1;
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if (init_done == 0) |
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__stdio_init(); |
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device_read(__console_dev, &ch, &len, 0);
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return ch;
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} |