From e676714e69b92bede502d839a85a5ba7e99a7304 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=A0t=C4=9Bp=C3=A1n=20N=C4=9Bmec?= <stepnem@smrk.net>
Date: Thu, 11 Apr 2024 23:16:34 +0200
Subject: [PATCH] perlipc.pod: improve "exec from signal handler" signal mask
 comment

"POSIX unmasks the sigprocmask properly" seems rather opaque.
Instead, explain the SA_NODEFER motivation directly.
---
 pod/perlipc.pod | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pod/perlipc.pod b/pod/perlipc.pod
index 30f08dd60c53..9b6538bffe61 100644
--- a/pod/perlipc.pod
+++ b/pod/perlipc.pod
@@ -204,7 +204,8 @@ info to show that it works; it should be replaced with the real code.
   my $script = File::Basename::basename($0);
   my $SELF  = catfile($FindBin::Bin, $script);
 
-  # POSIX unmasks the sigprocmask properly
+  # Use SA_NODEFER to prevent SIGHUP from being blocked in
+  # the new process (due to signal mask preservation across exec).
   my $sigset = POSIX::SigSet->new();
   my $action = POSIX::SigAction->new("sigHUP_handler",
 				     $sigset,