1 files changed, 10 insertions, 3 deletions
diff --git a/src/sysexec.hpp b/src/sysexec.hpp
index 73a18bf..85efaa0 100644
--- a/src/sysexec.hpp
+++ b/src/sysexec.hpp
@@ -10,9 +10,16 @@ int execScript(std::string const& script, std::string const& ifname)
     int fd;
     for (fd=getdtablesize();fd>=0;--fd) // close all file descriptors
       close(fd);
-    fd=open("/dev/null",O_RDWR);        // stdin
-    dup(fd);                            // stdout
-    dup(fd);                            // stderr
+
+    fd = open("/dev/null",O_RDWR);        // stdin
+    if(fd == -1)
+      cLog.msg(Log::PRIO_WARNING) << "can't open stdin";
+    else {
+      if(dup(fd) == -1)   // stdout
+        cLog.msg(Log::PRIO_WARNING) << "can't open stdout";
+      if(dup(fd) == -1)   // stderr
+        cLog.msg(Log::PRIO_WARNING) << "can't open stderr";
+    }
     return execl("/bin/sh", "/bin/sh", script.c_str(), ifname.c_str(), NULL);
   }
   int status = 0;