1/* Copyright (C) 1991-2020 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 <signal.h>
19#include <stdio.h>
20#include <stdlib.h>
21#include <string.h>
22#include <libintl.h>
23#include <tls-internal.h>
24
25/* Return a string describing the meaning of the signal number SIGNUM. */
26char *
27strsignal (int signum)
28{
29 const char *desc = __sigdescr_np (signum);
30 if (desc != NULL)
31 return _(desc);
32
33 struct tls_internal_t *tls_internal = __glibc_tls_internal ();
34 free (tls_internal->strsignal_buf);
35
36 int r;
37#ifdef SIGRTMIN
38 if (signum >= SIGRTMIN && signum <= SIGRTMAX)
39 r = __asprintf (&tls_internal->strsignal_buf, _("Real-time signal %d"),
40 signum - SIGRTMIN);
41 else
42#endif
43 r = __asprintf (&tls_internal->strsignal_buf, _("Unknown signal %d"),
44 signum);
45
46 if (r == -1)
47 tls_internal->strsignal_buf = NULL;
48
49 return tls_internal->strsignal_buf;
50}
51