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From f3cd936b81006df41a1c8509891dea1edeaef8e6 Mon Sep 17 00:00:00 2001
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From: Chet Ramey <chet.ramey@case.edu>
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Date: Tue, 4 May 2021 14:30:17 -0400
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Subject: [PATCH] Bash-5.1 patch 6: make sure child processes forked to execute
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command substitutions are in the right process group
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---
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patchlevel.h | 2 +-
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subst.c | 7 +++++++
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2 files changed, 8 insertions(+), 1 deletion(-)
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diff --git a/patchlevel.h b/patchlevel.h
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index c7f39aec..6257aeeb 100644
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--- a/patchlevel.h
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+++ b/patchlevel.h
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@@ -25,6 +25,6 @@
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regexp `^#define[ ]*PATCHLEVEL', since that's what support/mkversion.sh
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looks for to find the patch level (for the sccs version string). */
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-#define PATCHLEVEL 5
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+#define PATCHLEVEL 6
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#endif /* _PATCHLEVEL_H_ */
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diff --git a/subst.c b/subst.c
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index 1d24188e..462752de 100644
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--- a/subst.c
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+++ b/subst.c
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@@ -6412,6 +6412,13 @@ command_substitute (string, quoted, flags)
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/* The currently executing shell is not interactive. */
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interactive = 0;
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+#if defined (JOB_CONTROL)
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+ /* Invariant: in child processes started to run command substitutions,
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+ pipeline_pgrp == shell_pgrp. Other parts of the shell assume this. */
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+ if (pipeline_pgrp > 0 && pipeline_pgrp != shell_pgrp)
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+ shell_pgrp = pipeline_pgrp;
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+#endif
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+
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set_sigint_handler (); /* XXX */
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free_pushed_string_input ();
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--
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2.29.2
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