Reset any blocked signals after forking in libreprl

Author: Samuel Groß

Sources/libreprl/libreprl.c

@@ -206,6 +206,14 @@ static int reprl_spawn_child(struct reprl_context* ctx)
             _exit(-1);
         }
 
+        // Unblock any blocked signals. It seems that libdispatch sometimes blocks delivery of certain signals.
+        sigset_t newset;
+        sigemptyset(&newset);
+        if (sigprocmask(SIG_SETMASK, &newset, NULL) != 0) {
+            fprintf(stderr, "sigprocmask failed in the child: %s\n", strerror(errno));
+            _exit(-1);
+        }
+
         close(cwpipe[0]);
         close(crpipe[1]);