From c8d584f90e261b914487f8aa813ab0cd8c1d52f4 Mon Sep 17 00:00:00 2001 From: Dana Jansens Date: Thu, 11 Jul 2002 02:12:40 +0000 Subject: [PATCH] added signal handling --- util/epist/main.cc | 81 ++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 79 insertions(+), 2 deletions(-) diff --git a/util/epist/main.cc b/util/epist/main.cc index 3d518535..7c7d5840 100644 --- a/util/epist/main.cc +++ b/util/epist/main.cc @@ -21,9 +21,86 @@ // DEALINGS IN THE SOFTWARE. #ifdef HAVE_CONFIG_H -# include "../config.h" +# include "../../config.h" #endif // HAVE_CONFIG_H -int main(int, char **) { +extern "C" { +#ifdef HAVE_UNISTD_H +# include +# include +#endif // HAVE_UNISTD_H + +#ifdef HAVE_SIGNAL_H +# include +#endif // HAVE_SIGNAL_H + +#ifdef HAVE_SYS_SIGNAL_H +# include +#endif // HAVE_SYS_SIGNAL_H + +#ifdef HAVE_LIBGEN_H +# include +#endif // HAVE_LIBGEN_H +} + +#include + +using std::cout; +using std::endl; + +bool _shutdown = false; +char **_argv; + +#ifdef HAVE_SIGACTION +static void signalhandler(int sig) +#else // HAVE_SIGACTION +static RETSIGTYPE signalhandler(int sig) +#endif // HAVE_SIGACTION +{ + switch (sig) { + case SIGSEGV: + cout << "Segmentation fault. Aborting and dumping core.\n"; + abort(); + case SIGHUP: + cout << "Restarting on request.\n"; + execvp(_argv[0], _argv); + execvp(basename(_argv[0]), _argv); + } + _shutdown = true; + +#ifndef HAVE_SIGACTION + // assume broken, braindead sysv signal semantics + signal(sig, (RETSIGTYPE (*)(int)) signalhandler); +#endif // HAVE_SIGACTION +} + +int main(int, char **argv) { + _argv = argv; + +#ifdef HAVE_SIGACTION + struct sigaction action; + + action.sa_handler = signalhandler; + action.sa_mask = sigset_t(); + action.sa_flags = SA_NOCLDSTOP | SA_NODEFER; + + sigaction(SIGPIPE, &action, NULL); + sigaction(SIGSEGV, &action, NULL); + sigaction(SIGFPE, &action, NULL); + sigaction(SIGTERM, &action, NULL); + sigaction(SIGINT, &action, NULL); + sigaction(SIGHUP, &action, NULL); +#else // !HAVE_SIGACTION + signal(SIGPIPE, (RETSIGTYPE (*)(int)) signalhandler); + signal(SIGSEGV, (RETSIGTYPE (*)(int)) signalhandler); + signal(SIGFPE, (RETSIGTYPE (*)(int)) signalhandler); + signal(SIGTERM, (RETSIGTYPE (*)(int)) signalhandler); + signal(SIGINT, (RETSIGTYPE (*)(int)) signalhandler); + signal(SIGHUP, (RETSIGTYPE (*)(int)) signalhandler); +#endif // HAVE_SIGACTION + + while (! _shutdown) { + usleep(500); + } return 0; } -- 2.45.2