#include "s-irix3-3.h"

#define USG5_3

/* Define HAVE_ALLOCA to say that the system provides a properly
   working alloca function and it should be used. */
#define HAVE_ALLOCA
#undef C_ALLOCA
#ifdef emacs
#include <alloca.h>
#endif /* emacs */


/* use K&R C */
#define C_SWITCH_MACHINE -cckr

/*
 * if SIGIO is defined, much of the emacs
 * code assumes we are BSD !!
 */
#undef SIGIO

/* SGI has all the fancy wait stuff, but we can't include sys/wait.h
   because it defines BIG_ENDIAN and LITTLE_ENDIAN (ugh!.)  Instead
    we'll just define WNOHANG and wait3 right here. */

#define WNOHANG		0x1
#define HAVE_GETPTY

#ifdef emacs
extern char *_getpty();
#endif

/* No need to use sprintf to get the tty name--we get that from _getpty.  */
#define PTY_TTY_NAME_SPRINTF
/* No need to get the pty name at all.  */
#define PTY_NAME_SPRINTF
/* We need only try once to open a pty.  */
#define PTY_ITERATION
/* Here is how to do it.  */
/* ??? People say it is necessary to prevent SIGCHLD signals within _getpty.
   The right way is probably to block them.  Someone should try it.  */
#define PTY_OPEN						\
{								\
  int   mask =  sigblock(sigmask(SIGCHLD));			\
  char *name = _getpty (&fd, O_RDWR | O_NDELAY, 0600, 0);	\
								\
  sigsetmask(mask);						\
  if (name == 0)						\
    return -1;							\
  if (fd < 0)							\
    return -1;							\
  if (fstat (fd, &stb) < 0)					\
    return -1;							\
  strcpy (pty_name, name);					\
}