1 /**************************************************************************/
2 /* */
3 /* OCaml */
4 /* */
5 /* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
6 /* */
7 /* Copyright 2001 Institut National de Recherche en Informatique et */
8 /* en Automatique. */
9 /* */
10 /* All rights reserved. This file is distributed under the terms of */
11 /* the GNU Lesser General Public License version 2.1, with the */
12 /* special exception on linking described in the file LICENSE. */
13 /* */
14 /**************************************************************************/
15
16 #include <stdio.h>
17 #include <errno.h>
18 #include <string.h>
19 #include <caml/mlvalues.h>
20 #include <caml/alloc.h>
21 #include "unixsupport.h"
22
23 extern int error_table[];
24
unix_error_message(value err)25 CAMLprim value unix_error_message(value err)
26 {
27 int errnum;
28 char buffer[512];
29
30 errnum = Is_block(err) ? Int_val(Field(err, 0)) : error_table[Int_val(err)];
31 if (errnum > 0)
32 return caml_copy_string(strerror(errnum));
33 if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
34 NULL,
35 -errnum,
36 0,
37 buffer,
38 sizeof(buffer),
39 NULL))
40 return caml_copy_string(buffer);
41 sprintf(buffer, "unknown error #%d", errnum);
42 return caml_copy_string(buffer);
43 }
44