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