strsignal.c implementation

[Joel Sherrill <joel dot sherrill at oarcorp dot com>]

Hi,

I have implemented strsignal.c for RTEMS but
wondered if it was worth trying to make the
implementation match the ifdef's in sys/signal.h
and support other targets?

I have attached the current implementation. I
see two approaches to making it support all
the targets:

+ ifdefs in the table to match the numbers in
  sys/signal.h.
+ a long series of code something like this:
  #ifdef SIGXXX
    if ( signal == SIGXXX )
      return "string for SIGXXX";
  #endif

Any thoughts or comments?

--
Joel Sherrill, Ph.D.             Director of Research&  Development
joel.sherrill@OARcorp.com        On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
   Support Available             (256) 722-9985


/*
 *  Written by Joel Sherrill <joel.sherrill@OARcorp.com>.
 *
 *  COPYRIGHT (c) 2010.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  Permission to use, copy, modify, and distribute this software for any
 *  purpose without fee is hereby granted, provided that this entire notice
 *  is included in all copies of any software which is or includes a copy
 *  or modification of this software.
 *
 *  THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
 *  WARRANTY.  IN PARTICULAR,  THE AUTHOR MAKES NO REPRESENTATION
 *  OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY OF THIS
 *  SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
 *
 *  $Id$
 */

#include <string.h>
#include <signal.h>
#include <stdio.h>
#include <reent.h>

static const char *signal_string[] = {
  "Signal 0",
  "Hangup",                       /* SIGHUP */
  "Interrupt",                    /* SIGINT */
  "Quit",                         /* SIGQUIT */
  "Illegal instruction",          /* SIGILL */
  "Trace/breakpoint trap",        /* SIGTRAP */
  "IOT trap",                     /* SIGIOT */
  "EMT trap",                     /* SIGEMT */
  "Floating point exception",     /* SIGFPE */
  "Killed",                       /* SIGKILL */
  "Bus error",                    /* SIGBUS */
  "Segmentation fault",           /* SIGSEGV */
  "Bad system call",              /* SIGSYS */
  "Broken pipe",                  /* SIGPIPE */
  "Alarm clock",                  /* SIGALRM */
  "Terminated",                   /* SIGTERM */
  "Urgent I/O condition",         /* SIGURG */
  "Stopped (signal)",             /* SIGSTOP */
  "Stopped",                      /* SIGTSTP */
  "Continued",                    /* SIGCONT */
  "Child exited",                 /* SIGCHLD */
  "Stopped (tty input)",          /* SIGCLD */
  "Stopped (tty output)",         /* SIGTTIN */
  "I/O possible",                 /* SIGIO */
  "Window changed",               /* SIGWINCH */
  "User defined signal 1",        /* SIGUSR1 */
  "User defined signal 2"         /* SIGUSR2 */
};

const char *
strsignal (int signal)
{
  char *buffer;
  struct _reent *ptr;

  ptr = _REENT;

  _REENT_CHECK_SIGNAL_BUF(ptr);
  buffer = _REENT_SIGNAL_BUF(ptr);

  if (signal < 0 || signal > SIGRTMAX) {
    siprintf (buffer, "Unknown signal %d", signal);
    return buffer;
  }

  if ((signal >= SIGRTMIN) || (signal <= SIGRTMAX)) {
    siprintf (buffer, "Real-time signal %d", signal - SIGRTMIN);
    return buffer;
  }

  return signal_string[signal];
}