1/* Copyright (C) 1993-2024 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <libintl.h>
20#include <stdio.h>
21#include <string.h>
22#include <mach/error.h>
23#include <errorlib.h>
24#include <sys/param.h>
25#include <_itoa.h>
26
27/* It is critical here that we always use the `dcgettext' function for
28 the message translation. Since <libintl.h> only defines the macro
29 `dgettext' to use `dcgettext' for optimizing programs this is not
30 always guaranteed. */
31#ifndef dgettext
32# include <locale.h> /* We need LC_MESSAGES. */
33# define dgettext(domainname, msgid) dcgettext (domainname, msgid, LC_MESSAGES)
34#endif
35
36/* Fill buf with a string describing the errno code in ERRNUM. */
37int
38__xpg_strerror_r (int errnum, char *buf, size_t buflen)
39{
40 int system;
41 int sub;
42 int code;
43 const struct error_system *es;
44 extern void __mach_error_map_compat (int *);
45 const char *estr;
46
47 __mach_error_map_compat (&errnum);
48
49 system = err_get_system (errnum);
50 sub = err_get_sub (errnum);
51 code = err_get_code (errnum);
52
53 if (system > err_max_system || ! __mach_error_systems[system].bad_sub)
54 {
55 __snprintf (buf, buflen, "%s%X", _("Error in unknown error system: "),
56 errnum);
57 return EINVAL;
58 }
59
60 es = &__mach_error_systems[system];
61
62 if (sub >= es->max_sub)
63 estr = (const char *) es->bad_sub;
64 else if (code >= es->subsystem[sub].max_code)
65 return EINVAL;
66 else
67 estr = (const char *) _(es->subsystem[sub].codes[code]);
68
69 size_t estrlen = strlen (estr);
70
71 /* Terminate the string in any case. */
72 if (buflen > 0)
73 *((char *) __mempcpy (buf, estr, MIN (buflen - 1, estrlen))) = '\0';
74
75 return buflen <= estrlen ? ERANGE : 0;
76}
77

source code of glibc/sysdeps/mach/xpg-strerror.c