!95 Fix bug related to ctrl-X when output is not a termi

From: @Linux_zhang2024 
Reviewed-by: @shenyangyang01 
Signed-off-by: @shenyangyang01

backport-Fix-bug-related-to-ctrl-X-when-output-is-not-a-termi.patch

@@ -0,0 +1,43 @@
+From ed454a217da417dc052723ea70da8efde0f2e66c Mon Sep 17 00:00:00 2001
+From: Mark Nudelman <markn@greenwoodsoftware.com>
+Date: Sat, 10 Aug 2024 08:11:59 -0700
+Subject: [PATCH] Fix bug related to ctrl-X when output is not a terminal.
+
+We should not check for ctrl-X input when the output is not
+a terminal. This results in trying to poll and read input
+characters from stdin instead of from the terminal.
+
+This problem existed in v661 so is not strictly a regression
+that needs to be addressed in the upcoming bug fix release,
+but because it's a low-risk fix and has potentially serious
+consequences, I'm including it.
+
+Related to #558.
+---
+ os.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/os.c b/os.c
+index 61c336c..9f89777 100644
+--- a/os.c
++++ b/os.c
+@@ -80,6 +80,7 @@ extern int exit_F_on_close;
+ extern int follow_mode;
+ extern int scanning_eof;
+ extern char intr_char;
++extern int is_tty;
+ #if !MSDOS_COMPILER
+ extern int tty;
+ #endif
+@@ -237,7 +238,7 @@ start:
+ 	}
+ #endif
+ #if USE_POLL
+-	if (fd != tty && use_poll)
++	if (is_tty && fd != tty && use_poll)
+ 	{
+ 		int ret = check_poll(fd, tty);
+ 		if (ret != 0)
+-- 
+2.33.0
+

less.spec

@@ -1,6 +1,6 @@
 Name:		less
 Version:	633
-Release:        4
+Release:        5
 Summary:	Less is a pager that displays text files.
 License:	GPLv3+ or BSD
 URL:		http://www.greenwoodsoftware.com/less
@@ -14,6 +14,7 @@ Patch5:         backport-Don-t-return-READ_AGAIN-from-iread-if-no-data-has-ye.pa
 Patch6:         backport-Fix-for-previous-fix.patch
 Patch7:         backport-Avoid-stealing-data-from-an-input-program-that-uses-.patch
 Patch8:         backport-Do-not-assume-PATH_MAX-is-defined.patch
+Patch9:         backport-Fix-bug-related-to-ctrl-X-when-output-is-not-a-termi.patch
 
 BuildRequires:	gcc make ncurses-devel autoconf automake libtool
 
@@ -52,6 +53,9 @@ autoreconf -ivf
 %{_mandir}/man1/*
 
 %changelog
+* Mon Jan 27 2025 Linux_zhang <zhangruifang@h-partners.com> - 633-5
+- Fix bug related to ctrl-X when output is not a termi
+
 * Fri May 10 2024 baiguo <baiguo@kylinos.cn> - 633-4
 - Do not assume PATH_MAX is defined