1  /* Copyright (C) 1991-2023 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.  */
      26  char *
      27  strsignal (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  }