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#include <termios.h>
#include <sys/ioctl.h>
#include <errno.h>
int tcsetattr(int fd, int act, const struct termios *tio)
{
if (act < 0 || act > 2) {
errno = EINVAL;
return -1;
}
return ioctl(fd, TCSETS+act, tio);
}
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