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