File _service:tar_git:0006-ash-Write-history-on-SIGHUP.patch of Package busybox

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tomi=20Lepp=C3=A4nen?= <tomi.leppanen@jolla.com>
Date: Thu, 11 Feb 2021 18:08:59 +0200
Subject: [PATCH] ash: Write history on SIGHUP
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

If FEATURE_EDITING_SAVE_ON_EXIT is enabled, then write history on
SIGHUP. This should allow most terminals to save history when closing
window. Works also on SSH connection.

Signed-off-by: Tomi Leppänen <tomi.leppanen@jolla.com>
---
 shell/ash.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/shell/ash.c b/shell/ash.c
index dcaec69c5..019182f57 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -3666,6 +3666,19 @@ signal_handler(int signo)
 			return;
 	}
 
+#if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
+	if (signo == SIGHUP) {
+		/*
+		 * Terminal was closed, call exitshell() to write history etc.
+		 * unless there is a trap set, in which case just save the history
+		 */
+		if (!trap[SIGHUP])
+			exitshell();
+		else if (iflag)
+			save_history(line_input_state); /* may be NULL */
+	}
+#endif
+
 	gotsig[signo - 1] = 1;
 	pending_sig = signo;
 
@@ -3738,6 +3751,12 @@ setsignal(int signo)
 	if (signo == SIGCHLD)
 		new_act = S_CATCH;
 
+#if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
+	/* catch SIGHUP to write history on terminal close */
+	if (signo == SIGHUP && iflag)
+		new_act = S_CATCH;
+#endif
+
 	t = &sigmode[signo - 1];
 	cur_act = *t;
 	if (cur_act == 0) {
@@ -9588,6 +9607,7 @@ setinteractive(int on)
 	setsignal(SIGINT);
 	setsignal(SIGQUIT);
 	setsignal(SIGTERM);
+	setsignal(SIGHUP);
 	if (is_interactive > 1) {
 #if !ENABLE_FEATURE_SH_EXTRA_QUIET
 		/* Looks like they want an interactive shell */
-- 
2.31.1