From 2f1bb36a557f4ce8e1f5abd177c34dadbc0fb534 Mon Sep 17 00:00:00 2001
From: Denis Vlasenko <vda.linux@googlemail.com>
Date: Sat, 21 Apr 2007 10:01:14 +0000
Subject: hush: explain why "pipe; exit $?" doesn't show correct exitcode

---
 shell/README | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'shell/README')

diff --git a/shell/README b/shell/README
index 32ad67380..bcd84dcad 100644
--- a/shell/README
+++ b/shell/README
@@ -1,5 +1,10 @@
 Various bits of what is known about busybox shells, in no particular order.
 
+2007-04-22
+hush: "sleep 1 | exit 3; echo $?" prints 0 because $? is substituted
+_before_ pipe gets executed!! run_list_real() already has "pipe;echo"
+parsed and handed to it for execution, so it sees "pipe"; "echo 0".
+
 2007-04-21
 hush: removed setsid() and made job control sort-of-sometimes-work.
 Ctrl-C in "rm -i" works now except for SH_STANDALONE case.
-- 
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