41 lines
752 B
C
41 lines
752 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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ssize_t read(int fd, void* buffer, size_t count)
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{
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char i;
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/* We're only allowed to read from 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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/* Empty buffer? */
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if (count == 0)
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return 0;
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/* Read one byte. */
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i = _sys_rawread();
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if ((i == '\r') && !(_sys_ttyflags & INLCR))
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i = '\n';
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if (_sys_ttyflags & ECHO)
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_sys_write_tty(i);
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*(char*)buffer = i;
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return 1;
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}
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