SignalUtils.cpp

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* Copyright (C) 2006, Novell, Inc. All rights reserved.
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#include "blocxx/BLOCXX_config.h"
#include "blocxx/SignalUtils.hpp"
#include "blocxx/String.hpp"
#include <algorithm>

#include <signal.h>

namespace BLOCXX_NAMESPACE
{
   namespace SignalUtils
   {
      namespace // anonymous
      {
         struct signalNameMapping
         {
            int sig;
            const char* name;
         };

         // Simple comparison functions so that searching (and sorting, if
         // desired) can be done on a set of signal name mappings.
         bool operator <(const signalNameMapping& s1, const signalNameMapping& s2)
         {
            return s1.sig < s2.sig;
         }
         bool operator ==(const signalNameMapping& s1, const signalNameMapping& s2)
         {
            return s1.sig == s2.sig;
         }

         // An array (not neccessarily sorted) of signal mappings.  This is
         // really ugly, but various platforms duplicate signal numbers with
         // different constants.  Not all platforms duplicate them in the same
         // way, so a general case statement became difficult to manage.
         const signalNameMapping supportedSignalMapping[] =
            {
               { SIGINT, "SIGINT" },
               { SIGILL, " SIGILL" },
               { SIGABRT, "SIGABRT" },
               { SIGFPE, " SIGFPE" },
               { SIGSEGV, "SIGSEGV" },
               { SIGTERM, "SIGTERM" },
#ifdef BLOCXX_WIN32
               { SIGBREAK, "SIGBREAK" }
#else
               { SIGHUP, "SIGHUP" },
               { SIGQUIT, "SIGQUIT" },
               { SIGKILL, "SIGKILL" },
               { SIGPIPE, "SIGPIPE" },
               { SIGALRM, "SIGALRM" },
               { SIGUSR1, "SIGUSR1" },
               { SIGUSR2, "SIGUSR2" },
               { SIGCHLD, "SIGCHLD" },
               { SIGCONT, "SIGCONT" },
               { SIGSTOP, "SIGSTOP" },
               { SIGTSTP, "SIGTSTP" },
               { SIGTTIN, "SIGTTIN" },
               { SIGTTOU, "SIGTTOU" },
               { SIGBUS, "SIGBUS" },
#ifdef SIGPOLL
               { SIGPOLL, "SIGPOLL" },
#endif
               { SIGPROF, "SIGPROF" },
               { SIGSYS, "SIGSYS" },
               { SIGTRAP, "SIGTRAP" },
               { SIGURG, "SIGURG" },
               { SIGVTALRM, "SIGVTALRM" },
               { SIGXCPU, "SIGXCPU" },
               { SIGXFSZ, "SIGXFSZ" },
#ifdef SIGEMT
               { SIGEMT, "SIGEMT" },
#endif
#ifdef SIGSTKFLT
               { SIGSTKFLT, "SIGSTKFLT" },
#endif
#ifdef SIGPWR
               { SIGPWR, "SIGPWR" },
#endif
#ifdef SIGLOST
               { SIGLOST, "SIGLOST" },
#endif
               { SIGWINCH, "SIGWINCH" },
#ifdef SIGINFO
               { SIGINFO, "SIGINFO" },
#endif
               { SIGIOT, "SIGIOT" },
               { SIGIO, "SIGIO" },
#ifdef SIGCLD
               { SIGCLD, "SIGCLD" },
#endif
#ifdef SIGUNUSED
               { SIGUNUSED, "SIGUNUSED" }
#endif
#endif // for  #ifdef BLOCXX_WIN32....#else...
            };
      } // end anonymous namespace

      const char* signalName(int sig)
      {
         signalNameMapping targetSignal = { sig, "" };

         const signalNameMapping* begin = supportedSignalMapping;
         const signalNameMapping* end = begin + sizeof(supportedSignalMapping) / sizeof(*supportedSignalMapping);

         const signalNameMapping* location = std::find(begin, end, targetSignal);

         if( location != end )
         {
            return location->name;
         }
         return "UNKNOWN";
      }
   } // end namespace SignalUtils
} // end namespace BLOCXX_NAMESPACE