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/**************************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. */
/* */
/* All rights reserved. This file is distributed under the terms of */
/* the GNU Lesser General Public License version 2.1, with the */
/* special exception on linking described in the file LICENSE. */
/* */
/**************************************************************************/
/* Needed to get linkat exposed in compliant OS.
Must be defined before the first system .h is included. */
#define _XOPEN_SOURCE 700
#include <caml/mlvalues.h>
#include <caml/memory.h>
#include <caml/signals.h>
#include "caml/unixsupport.h"
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
CAMLprim value caml_unix_link(value follow, value path1, value path2)
{
CAMLparam3(follow, path1, path2);
char * p1;
char * p2;
int ret;
caml_unix_check_path(path1, "link");
caml_unix_check_path(path2, "link");
p1 = caml_stat_strdup(String_val(path1));
p2 = caml_stat_strdup(String_val(path2));
caml_enter_blocking_section();
if (Is_none(follow))
ret = link(p1, p2);
else {
# ifdef AT_SYMLINK_FOLLOW
int flags =
Is_some(follow) && Bool_val(Some_val(follow))
? AT_SYMLINK_FOLLOW
: 0;
ret = linkat(AT_FDCWD, p1, AT_FDCWD, p2, flags);
# else
ret = -1; errno = ENOSYS;
# endif
}
caml_leave_blocking_section();
caml_stat_free(p1);
caml_stat_free(p2);
if (ret == -1) caml_uerror("link", path2);
CAMLreturn(Val_unit);
}
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