59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
/**************************************************************************/
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/* */
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/* OCaml */
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/* */
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/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* en Automatique. */
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/* */
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/* All rights reserved. This file is distributed under the terms of */
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/* the GNU Lesser General Public License version 2.1, with the */
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/* special exception on linking described in the file LICENSE. */
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/* */
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/**************************************************************************/
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/* Needed to get linkat exposed in compliant OS.
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Must be defined before the first system .h is included. */
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#define _XOPEN_SOURCE 700
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#include <caml/mlvalues.h>
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#include <caml/memory.h>
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#include <caml/signals.h>
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#include "unixsupport.h"
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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CAMLprim value unix_link(value follow, value path1, value path2)
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{
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CAMLparam3(follow, path1, path2);
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char * p1;
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char * p2;
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int ret;
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caml_unix_check_path(path1, "link");
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caml_unix_check_path(path2, "link");
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p1 = caml_stat_strdup(String_val(path1));
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p2 = caml_stat_strdup(String_val(path2));
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caml_enter_blocking_section();
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if (follow == Val_int(0) /* None */)
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ret = link(p1, p2);
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else { /* Some bool */
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# ifdef AT_SYMLINK_FOLLOW
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int flags =
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Is_block(follow) && Bool_val(Field(follow, 0)) /* Some true */
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? AT_SYMLINK_FOLLOW
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: 0;
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ret = linkat(AT_FDCWD, p1, AT_FDCWD, p2, flags);
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# else
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ret = -1; errno = ENOSYS;
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# endif
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}
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caml_leave_blocking_section();
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caml_stat_free(p1);
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caml_stat_free(p2);
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if (ret == -1) uerror("link", path2);
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CAMLreturn(Val_unit);
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}
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