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From f3cd936b81006df41a1c8509891dea1edeaef8e6 Mon Sep 17 00:00:00 2001
From: Chet Ramey <chet.ramey@case.edu>
Date: Tue, 4 May 2021 14:30:17 -0400
Subject: [PATCH] Bash-5.1 patch 6: make sure child processes forked to execute
command substitutions are in the right process group
---
patchlevel.h | 2 +-
subst.c | 7 +++++++
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/patchlevel.h b/patchlevel.h
index c7f39aec..6257aeeb 100644
--- a/patchlevel.h
+++ b/patchlevel.h
@@ -25,6 +25,6 @@
regexp `^#define[ ]*PATCHLEVEL', since that's what support/mkversion.sh
looks for to find the patch level (for the sccs version string). */
-#define PATCHLEVEL 5
+#define PATCHLEVEL 6
#endif /* _PATCHLEVEL_H_ */
diff --git a/subst.c b/subst.c
index 1d24188e..462752de 100644
--- a/subst.c
+++ b/subst.c
@@ -6412,6 +6412,13 @@ command_substitute (string, quoted, flags)
/* The currently executing shell is not interactive. */
interactive = 0;
+#if defined (JOB_CONTROL)
+ /* Invariant: in child processes started to run command substitutions,
+ pipeline_pgrp == shell_pgrp. Other parts of the shell assume this. */
+ if (pipeline_pgrp > 0 && pipeline_pgrp != shell_pgrp)
+ shell_pgrp = pipeline_pgrp;
+#endif
+
set_sigint_handler (); /* XXX */
free_pushed_string_input ();
--
2.27.0
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