From: Denys Vlasenko <vda.linux@googlemail.com>
Date: Wed, 28 Sep 2016 17:44:16 +0000 (+0200)
Subject: ash: Remove unused EV_BACKCMD flag
X-Git-Tag: 1_26_0~240
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=7ee7c6fc20d3b94c257f829dece097ff339895ee;p=oweals%2Fbusybox.git

ash: Remove unused EV_BACKCMD flag

    The original ash defered forking commands in backquotes so builtins
    could be run in the same context as the shell.  This behavior was
    controlled using the EV_BACKCMD to evaltree.

    Unfortunately, as Matthias Scheler noticed in 1999 (NetBSD PR/7814),
    the result was counterintuitive; for example, echo "`cd /`" would
    change the cwd.  So ash 0.3.5 left out that optimization.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---

diff --git a/shell/ash.c b/shell/ash.c
index ec006af7d..f395a16a9 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -8065,7 +8065,6 @@ static char *funcstring;        /* block to allocate strings from */
 /* flags in argument to evaltree */
 #define EV_EXIT    01           /* exit after evaluating tree */
 #define EV_TESTED  02           /* exit status is checked; ignore -e flag */
-#define EV_BACKCMD 04           /* command executing within back quotes */
 
 static const uint8_t nodesize[N_NUMBER] ALIGN1 = {
 	[NCMD     ] = SHELL_ALIGN(sizeof(struct ncmd)),