50 lines
682 B
C
50 lines
682 B
C
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#include <stdlib.h>
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#include <errno.h>
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#include <sgtty.h>
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#include "libsys.h"
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extern struct
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{
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int fd;
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char* buffer;
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size_t count;
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} _sys_params_in;
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extern struct
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{
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size_t bytesread;
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} _sys_params_out;
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#define P _sys_params_in
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int _sys_read(void)
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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 ((P.fd < 0) || (P.fd > 2))
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return EBADF;
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/* Empty buffer? */
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if (P.count == 0)
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{
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_sys_params_out.bytesread = 0;
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return 0;
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}
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/* Read one byte. */
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i = _sys_rawread();
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if ((i == '\r') && !(_sys_ttyflags & RAW))
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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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*P.buffer = i;
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_sys_params_out.bytesread = 1;
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return 0;
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}
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