From 670f66a5e1804519e1e1b4554915b7c7da6b72b0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luc=C3=ADa=20Andrea=20Illanes=20Albornoz?=
 <lucia@luciaillanes.de>
Date: Sat, 18 Mar 2023 09:56:28 +0100
Subject: Safely send dispatcher messages.

---
 subr.ex/ex_pkg_dispatch.subr | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'subr.ex/ex_pkg_dispatch.subr')

diff --git a/subr.ex/ex_pkg_dispatch.subr b/subr.ex/ex_pkg_dispatch.subr
index 1274aa64..217bd360 100644
--- a/subr.ex/ex_pkg_dispatch.subr
+++ b/subr.ex/ex_pkg_dispatch.subr
@@ -380,4 +380,23 @@ ex_pkg_dispatch() {
 	return "${_epd_rc}";
 };
 
+#
+# ex_pkg_dipatch_send() - send message from dispatcher child process to dispatcher parent process across FIFO
+# @_op:		message operation string
+#
+# Return:	zero (0) invariably.
+#
+ex_pkg_dispatch_send() {
+	local _epds_op="${1}";
+	shift 1;
+
+	trap '' PIPE;
+	while ! printf "%s%s\n" "${_epds_op}" "${*:+ "${*}"}" 1>&3 2>/dev/null; do
+		:;
+	done;
+	trap - PIPE;
+
+	return 0;
+};
+
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