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 ();

-- 

2.29.2