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/* Reentrant versions of file system calls.  These implementations

   just call the usual system calls.  */

#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_link_syscalls = 1;

#else

/* We use the errno variable used by the system dependent layer.  */

#undef errno

extern int errno;

/*

FUNCTION

        <<_link_r>>---Reentrant version of link

INDEX

        _link_r

ANSI_SYNOPSIS

        #include <reent.h>

        int _link_r(struct _reent *<[ptr]>,

                    const char *<[old]>, const char *<[new]>);

TRAD_SYNOPSIS

        #include <reent.h>

        int _link_r(<[ptr]>, <[old]>, <[new]>)

        struct _reent *<[ptr]>;

        char *<[old]>;

        char *<[new]>;

DESCRIPTION

        This is a reentrant version of <<link>>.  It

        takes a pointer to the global data block, which holds

        <<errno>>.

*/

int

_DEFUN (_link_r, (ptr, old, new),

     struct _reent *ptr _AND

     _CONST char *old _AND

     _CONST char *new)

{

  int ret;

  errno = 0;

  if ((ret = _link (old, new)) == -1 && errno != 0)

    ptr->_errno = errno;

  return ret;

}

#endif /* ! defined (REENTRANT_SYSCALLS_PROVIDED) */