Terminate smoothly on CTRL-C.

[loba.git] / main.cpp

diff --git a/main.cpp b/main.cpp
index ff1fa1bb27f0708b1f2eb1b9ecac24c9e41f7b24..76125e9db0b639a3d7e027b6b5ceb7c99d637c04 100644 (file)
--- a/main.cpp
+++ b/main.cpp
@@ -1,5 +1,7 @@
-#include <cstring>
+#include <cerrno>
+#include <cstring>              // strchr
 #include <iostream>
+#include <signal.h>
 #include <stdexcept>
 #include <msg/msg.h>
 #include <xbt/log.h>
@@ -36,6 +38,7 @@ namespace {
         EXIT_FAILURE_INIT  = 0x02,  // failed to initialize simulator
         EXIT_FAILURE_SIMU  = 0x04,  // simulation failed
         EXIT_FAILURE_CLEAN = 0x08,  // error at cleanup
+        EXIT_FAILURE_OTHER = 0x10,  // other error
     };
 
     // Cannot be globally initialized...
@@ -131,6 +134,28 @@ static void check_for_lost_load()
                  total_running, running_ratio);
 }
 
+static void signal_handler(int /*sig*/)
+{
+    if (!opt::exit_request) {
+        XBT_CRITICAL(">>>>>>>>>>"
+                     " caught CTRL-C: global exit requested "
+                     "<<<<<<<<<<");
+        opt::exit_request = true;
+    }
+}
+
+static void install_signal_handler()
+{
+    struct sigaction action;
+    action.sa_handler = signal_handler;
+    sigemptyset(&action.sa_mask);
+    action.sa_flags = SA_RESTART;
+    if (sigaction (SIGINT, &action, NULL) == -1) {
+        std::cerr << "sigaction: " << strerror(errno) << "\n";
+        exit(EXIT_FAILURE_OTHER);
+    }
+}
+
 #define PR_STATS(descr, st)                                             \
     XBT_INFO("| %.*s: %g / %g / %g", DATA_DESCR_WIDTH,                  \
              descr " (total/avg./stddev)................................", \
@@ -162,6 +187,7 @@ int main(int argc, char* argv[])
     // Note: MSG_global_init() may throw an exception, but it seems
     // impossible to catch it correctly :-(
     MSG_global_init(&argc, argv);
+    install_signal_handler();
 
     // Parse global parameters
     bool parse_res = opt::parse_args(&argc, argv);