1/* Copyright (C) 1991-2024 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 <signal.h>
19#include <stdio.h>
20#include <stdlib.h>
21#include <string.h>
22#include <libintl.h>
23#include <tls-internal.h>
24#include <libc-internal.h>
25
26/* Return a string describing the meaning of the signal number SIGNUM. */
27char *
28strsignal (int signum)
29{
30 const char *desc = __sigdescr_np (signum);
31 if (desc != NULL)
32 return _(desc);
33
34 if (__libc_initial)
35 {
36 struct tls_internal_t *tls_internal = __glibc_tls_internal ();
37 free (ptr: tls_internal->strsignal_buf);
38
39 int r;
40#ifdef SIGRTMIN
41 if (signum >= SIGRTMIN && signum <= SIGRTMAX)
42 r = __asprintf (&tls_internal->strsignal_buf, _("Real-time signal %d"),
43 signum - SIGRTMIN);
44 else
45#endif
46 r = __asprintf (&tls_internal->strsignal_buf, _("Unknown signal %d"),
47 signum);
48
49 if (r >= 0)
50 return tls_internal->strsignal_buf;
51 else
52 tls_internal->strsignal_buf = NULL;
53 }
54 /* Fall through on asprintf error, and for !__libc_initial:
55 secondary namespaces use a different malloc and cannot
56 participate in the buffer management. */
57 return _("Unknown signal");
58}
59

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source code of glibc/string/strsignal.c