Unblock signals in forked scriptlets

issue:https://gitee.com/openeuler/community/issues/I60OLI?from=project-issue

Signed-off-by: Chen Xiao <abigwc@163.com>

backport-Unblock-signals-in-forked-scriptlets.patch

@@ -0,0 +1,37 @@
+From cb6aa82dbc10d554f8d234e934ae7c77e39a3ce2 Mon Sep 17 00:00:00 2001
+From: Panu Matilainen <pmatilai@redhat.com>
+Date: Tue, 12 Jan 2021 13:35:23 +0200
+Subject: [PATCH] Unblock signals in forked scriptlets
+
+Since commit c5f82d3f6223ebd0c5cc0a07ea60393ae7284929 we've blocked
+most signals during transactions, which makes sense to rpm itself but
+the signal mask is inherited to childs and carried even across exec(),
+so all scriptlets are executing with those signals blocked as well.
+Which in turn does not make sense, the scriptlets could run stuff that
+actually depends on signal delivery (such as SIGALARM in RhBug:1913765).
+
+Unblock all signals for forked scriptlet execution (Lua scriptlets are
+totally different as they execute in-process for now)
+---
+ lib/rpmscript.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/lib/rpmscript.c b/lib/rpmscript.c
+index 2ae3378f7..c69d29554 100644
+--- a/lib/rpmscript.c
++++ b/lib/rpmscript.c
+@@ -152,6 +152,11 @@ static void doScriptExec(ARGV_const_t argv, ARGV_const_t prefixes,
+ 			FD_t scriptFd, FD_t out)
+ {
+     int xx;
++    sigset_t set;
++
++    /* Unmask all signals, the scripts may need them */
++    sigfillset(&set);
++    sigprocmask(SIG_UNBLOCK, &set, NULL);
+ 
+     /* SIGPIPE is ignored in rpm, reset to default for the scriptlet */
+     (void) signal(SIGPIPE, SIG_DFL);
+-- 
+2.27.0
+

rpm.spec

@@ -1,6 +1,6 @@
 Name:          rpm
 Version:       4.15.1
-Release:       40
+Release:       41
 Summary:       RPM Package Manager
 License:       GPLv2+
 URL:           http://www.rpm.org/
@@ -182,6 +182,7 @@ Patch162: backport-Fix-changelog-parsing-affecting-caller-timezone-stat.patch
 Patch163: backport-rpm2cpio.sh-Don-t-drop-newlines-from-header-sizes.patch
 Patch164: backport-rpm2cpio.sh-strip-null-bytes-with-tr.patch
 Patch165: backport-rpm2cpio.sh-only-read-needed-bytes-of-file-magic.patch
+Patch166: backport-Unblock-signals-in-forked-scriptlets.patch
 
 BuildRequires: gcc autoconf automake libtool make gawk popt-devel openssl-devel readline-devel libdb-devel
 BuildRequires: zlib-devel libzstd-devel xz-devel bzip2-devel libarchive-devel ima-evm-utils-devel
@@ -465,6 +466,12 @@ make check || (cat tests/rpmtests.log; exit 0)
 %{_mandir}/man1/gendiff.1*
 
 %changelog
+* Mon Nov 14 2022 Chen Xiao<chenx1@wangsu.com> - 4.15.1-41
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:unblock signals in forked scriptlets.
+
 * Mon Nov 07 2022 renhongxun<renhongxun@h-partners.com> - 4.15.1-40
 - Type:bugfix
 - ID:NA