Forked processes does not receive signals

[stacyharper]

@emersion mentionned that the forked process probably still got the signal masks of swayidle

  A child created via fork(2) inherits a copy of its parent's
  signal mask; the signal mask is preserved across execve(2).

I tried something like this without succes :(

diff --git a/main.c b/main.c
index 1a790e4..3933327 100644
--- a/main.c
+++ b/main.c
@@ -148,6 +148,9 @@ static void cmd_exec(char *param) {
                        pid = fork();
                }
                if (pid == 0) {
+                       signal(SIGINT, SIG_DFL);
+                       signal(SIGTERM, SIG_DFL);
+                       signal(SIGUSR1, SIG_DFL);
                        char *const cmd[] = { "sh", "-c", param, NULL, };
                        execvp(cmd[0], cmd);
                        swayidle_log_errno(LOG_ERROR, "execve failed!");

edit: It looks like fork should be enough to reset signals handlers

  A child created via fork(2) initially has an empty pending signal
  set; the pending signal set is preserved across an execve(2).