sig2str.h

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/* sig2str.h -- convert between signal names and numbers

   Copyright (C) 2002 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* Written by Paul Eggert.  */

/* Include <signal.h> before including this file.  */

/* Don't override system declarations of SIG2STR_MAX, sig2str, str2sig.  */
#ifndef SIG2STR_MAX

/* Upper bound on the string length of an integer converted to string.
   302 / 1000 is ceil (log10 (2.0)).  Subtract 1 for the sign bit;
   add 1 for integer division truncation; add 1 more for a minus sign.  */
# define INT_STRLEN_BOUND(t) ((sizeof (t) * CHAR_BIT - 1) * 302 / 1000 + 2)

/* Size of a buffer needed to hold a signal name like "HUP".  */
# define SIG2STR_MAX (sizeof "SIGRTMAX" + INT_STRLEN_BOUND (int) - 1)

int sig2str (int, char *);
int str2sig (char const *, int *);

#endif

/* An upper bound on signal numbers allowed by the system.  */

#if defined _sys_nsig
# define SIGNUM_BOUND (_sys_nsig - 1)
#elif defined NSIG
# define SIGNUM_BOUND (NSIG - 1)
#else
# define SIGNUM_BOUND 64
#endif