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/* Reentrant version of rename system call.  */
 
#include <reent.h>
#include <unistd.h>
#include <sys/stat.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
 
#ifndef REENTRANT_SYSCALLS_PROVIDED
 
/* We use the errno variable used by the system dependent layer.  */
#undef errno
extern int errno;
 
/*
FUNCTION
	<<_rename_r>>---Reentrant version of rename
 
INDEX
	_rename_r
 
ANSI_SYNOPSIS
	#include <reent.h>
	int _rename_r(struct _reent *<[ptr]>,
		const char *<[old]>, const char *<[new]>);
 
TRAD_SYNOPSIS
	#include <reent.h>
	int _rename_r(<[ptr]>, <[old]>, <[new]>)
	struct _reent *<[ptr]>;
	char *<[old]>;
	char *<[new]>;
 
DESCRIPTION
	This is a reentrant version of <<rename>>.  It
	takes a pointer to the global data block, which holds
	<<errno>>.
*/
 
int
_DEFUN (_rename_r, (ptr, old, new),
     struct _reent *ptr _AND
     _CONST char *old _AND
     _CONST char *new)
{
  int ret = 0;
 
#ifdef HAVE_RENAME
  errno = 0;
  if ((ret = _rename (old, new)) == -1 && errno != 0)
    ptr->_errno = errno;
#else
  if (_link_r (ptr, old, new) == -1)
    return -1;
 
  if (_unlink_r (ptr, old) == -1)
    {
      /* ??? Should we unlink new? (rhetorical question) */
      return -1;
    }
#endif
  return ret;
}
 
#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */