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/* Reentrant versions of isatty system call.  */
 
#include <reent.h>
#include <unistd.h>
#include <_syslist.h>
 
/* Some targets provides their own versions of these functions.  Those
   targets should define REENTRANT_SYSCALLS_PROVIDED in TARGET_CFLAGS.  */
 
#ifdef _REENT_ONLY
#ifndef REENTRANT_SYSCALLS_PROVIDED
#define REENTRANT_SYSCALLS_PROVIDED
#endif
#endif
 
#ifdef REENTRANT_SYSCALLS_PROVIDED
 
int _dummy_isatty_syscalls = 1;
 
#else
 
/* We use the errno variable used by the system dependent layer.  */
#undef errno
extern int errno;
 
/*
FUNCTION
	<<_isatty_r>>---Reentrant version of isatty
 
INDEX
	_isatty_r
 
ANSI_SYNOPSIS
	#include <reent.h>
	int _isatty_r(struct _reent *<[ptr]>,
		     int <[fd]>);
 
TRAD_SYNOPSIS
	#include <reent.h>
	int _isatty_r(<[ptr]>, <[fd]>)
	struct _reent *<[ptr]>;
	int <[fd]>;
 
DESCRIPTION
	This is a reentrant version of <<isatty>>.  It
	takes a pointer to the global data block, which holds
	<<errno>>.
*/
 
int
_isatty_r (ptr, fd)
     struct _reent *ptr;
     int fd;
{
  int ret;
 
  errno = 0;
  if ((ret = _isatty (fd)) == -1 && errno != 0)
    ptr->_errno = errno;
  return ret;
}
 
#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */