libc/src/stdlib.cpp

@@ -191,9 +191,6 @@ extern "C"
             return S_ISREG(st.st_mode);
         }
 
-        // FIXME: During the execution of system(), SIGCHLD will be blocked, and SIGINT and SIGQUIT will be ignored, in
-        // the process that calls system().
-
         pid_t child = fork();
         if (child == 0)
         {
@@ -203,9 +200,21 @@ extern "C"
 
         if (child < 0) return -1;
 
+        sigset_t set, oldset;
+        sigemptyset(&set);
+        sigaddset(&set, SIGCHLD);
+        sigprocmask(SIG_BLOCK, &set, &oldset);
+
+        auto old_int = signal(SIGINT, SIG_IGN);
+        auto old_quit = signal(SIGQUIT, SIG_IGN);
+
         int status;
         waitpid(child, &status, 0);
 
+        sigprocmask(SIG_SETMASK, &oldset, nullptr);
+        signal(SIGINT, old_int);
+        signal(SIGQUIT, old_quit);
+
         return status;
     }