git: 384006a4c59f - stable/15 - rc.subr: Move the sleep in wait_for_pids

The branch stable/15 has been updated by des:

URL: https://cgit.FreeBSD.org/src/commit/?id=384006a4c59f9f8c844cf0eb51a3144dd2a1795d

commit 384006a4c59f9f8c844cf0eb51a3144dd2a1795d
Author:     Dag-Erling Smørgrav <des@FreeBSD.org>
AuthorDate: 2025-09-23 12:55:56 +0000
Commit:     Dag-Erling Smørgrav <des@FreeBSD.org>
CommitDate: 2025-10-02 08:19:22 +0000

    rc.subr: Move the sleep in wait_for_pids
    
    Instead of sleeping while constructing the list of PIDs to wait for,
    sleep briefly after pwait to give init a chance to reap the processes
    that just terminated before we loop around and start probing them.
    
    PR:             289630
    Reviewed by:    allanjude
    Differential Revision:  https://reviews.freebsd.org/D52619
    
    (cherry picked from commit 5953e7c98427e038500221e885dffa181dcc064b)
---
 libexec/rc/rc.subr | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libexec/rc/rc.subr b/libexec/rc/rc.subr
index 06b1bd51384c..6be226021949 100644
--- a/libexec/rc/rc.subr
+++ b/libexec/rc/rc.subr
@@ -804,7 +804,6 @@ wait_for_pids()
 		for _j in $_list; do
 			if kill -0 $_j 2>/dev/null; then
 				_nlist="${_nlist}${_nlist:+ }$_j"
-				[ -n "$_prefix" ] && sleep 1
 			fi
 		done
 		if [ -z "$_nlist" ]; then
@@ -814,6 +813,10 @@ wait_for_pids()
 		echo -n ${_prefix:-"Waiting for PIDS: "}$_list
 		_prefix=", "
 		pwait -o $_list 2>/dev/null
+		# At least one of the processes we were waiting for
+		# has terminated.  Give init a chance to collect it
+		# before looping around and checking again.
+		sleep 1
 	done
 	if [ -n "$_prefix" ]; then
 		echo "."