updated exit status handling of exec script

2 files changed, 13 insertions, 2 deletions

diff --git a/src/sysexec.h b/src/sysexec.h
index 2b01bc8..04226a1 100644
--- a/src/sysexec.h
+++ b/src/sysexec.h
@@ -56,11 +56,22 @@ int exec_script(const char* script, const char* ifname)
       if(dup(fd) == -1)   // stderr
         log_printf(WARNING,  "can't open stderr");
     }
-    return execl("/bin/sh", "/bin/sh", script, ifname, NULL);
+    execl("/bin/sh", "/bin/sh", script, ifname, NULL);
+        // if execl return, an error occurred
+    log_printf(ERR, "error on executing script: %m");
+    return -1;
   }
   int status = 0;
   waitpid(pid, &status, 0);
+  if(WIFEXITED(status))
+    log_printf(NOTICE, "script '%s' returned %d", script, WEXITSTATUS(status));  
+  else if(WIFSIGNALED(status))
+    log_printf(NOTICE, "script '%s' terminated after signal %d", script, WTERMSIG(status));
+  else
+    log_printf(ERR, "executing script: unkown error");
+
   return status;
+
 }
 
 #endif
diff --git a/src/uanytun.c b/src/uanytun.c
index c4a4f1b..d1919d6 100644
--- a/src/uanytun.c
+++ b/src/uanytun.c
@@ -362,8 +362,8 @@ int main(int argc, char* argv[])
   log_printf(NOTICE, "dev of type '%s' opened, actual name is '%s'", tun_get_type_string(&dev), dev.actual_name_);
 
   if(opt.post_up_script_) {
+    log_printf(NOTICE, "executing post-up script '%s'", opt.post_up_script_);
     int ret = exec_script(opt.post_up_script_, dev.actual_name_);
-    log_printf(NOTICE, "post-up script returned %d", ret);
   }