50 lines
827 B
C
50 lines
827 B
C
/*
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* Raspberry Pi support library for the ACK
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* © 2013 David Given
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* This file is redistributable under the terms of the 3-clause BSD license.
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* See the file 'Copying' in the root of the distribution for the full text.
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*/
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <termios.h>
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#include "libsys.h"
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int _sys_ttyflags = ONLCR | INLCR | ECHO;
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void _sys_write_tty(char c)
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{
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_sys_rawwrite(c);
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if ((c == '\n') && (_sys_ttyflags & ONLCR))
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_sys_rawwrite('\r');
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}
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ssize_t write(int fd, void* buffer, size_t count)
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{
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int i;
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char* p = buffer;
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/* We're only allowed to write to fd 0, 1 or 2. */
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if ((fd < 0) || (fd > 2))
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{
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errno = EBADF;
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return -1;
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}
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/* Write all data. */
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i = 0;
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while (i < count)
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{
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_sys_write_tty(*p++);
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i++;
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}
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/* No failures. */
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return count;
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}
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