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keep “set -x” disabled during PS4 expansion, to avoid infinite looping

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This commit is contained in:
tg
2015-03-01 15:23:05 +00:00
parent 06045cf889
commit 707add559f
3 changed files with 40 additions and 7 deletions
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29
check.t
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@@ -1,4 +1,4 @@
# $MirOS: src/bin/mksh/check.t,v 1.681 2015/02/20 07:14:26 tg Exp $
# $MirOS: src/bin/mksh/check.t,v 1.682 2015/03/01 15:23:03 tg Exp $
# -*- mode: sh -*-
#-
# Copyright © 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
@@ -30,7 +30,7 @@
# (2013/12/02 20:39:44) http://openbsd.cs.toronto.edu/cgi-bin/cvsweb/src/regress/bin/ksh/?sortby=date
expected-stdout:
@(#)MIRBSD KSH R50 2015/02/20
@(#)MIRBSD KSH R50 2015/03/02
description:
Check version of shell.
stdin:
@@ -39,7 +39,7 @@ name: KSH_VERSION
category: shell:legacy-no
---
expected-stdout:
@(#)LEGACY KSH R50 2015/02/20
@(#)LEGACY KSH R50 2015/03/02
description:
Check version of legacy shell.
stdin:
@@ -11930,3 +11930,26 @@ expected-stdout:
Copyright (C) 2002 Free Software Foundation, Inc.'
EOF
chmod +x bash
"$__progname" -xc 'foo=$(./bash --version 2>&1 | head -1); echo "=$foo="'
expected-stdout:
=GNU bash, version 2.05b.0(1)-release (i386-ecce-mirbsd10)=
expected-stderr-pattern:
/.*/
---
name: xtrace-2
description:
Check that "set -x" is off during PS4 expansion
stdin:
f() {
print -n "(f1:$-)"
set -x
print -n "(f2:$-)"
}
PS4='[(p:$-)$(f)] '
print "(o0:$-)"
set -x -o inherit-xtrace
print "(o1:$-)"
set +x
print "(o2:$-)"
expected-stdout:
(o0:sh)

14
misc.c
View File

@@ -30,7 +30,7 @@
#include <grp.h>
#endif
__RCSID("$MirOS: src/bin/mksh/misc.c,v 1.224 2015/01/25 15:23:41 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/misc.c,v 1.225 2015/03/01 15:23:04 tg Exp $");
#define KSH_CHVT_FLAG
#ifdef MKSH_SMALL
@@ -304,6 +304,11 @@ change_flag(enum sh_flag f, int what, bool newset)
void
change_xtrace(unsigned char newval, bool dosnapshot)
{
static bool in_xtrace;
if (in_xtrace)
return;
if (!dosnapshot && newval == Flag(FXTRACE))
return;
@@ -328,8 +333,13 @@ change_xtrace(unsigned char newval, bool dosnapshot)
shl_xtrace->fd = 2;
changed_xtrace:
if ((Flag(FXTRACE) = newval) == 2)
if ((Flag(FXTRACE) = newval) == 2) {
in_xtrace = true;
Flag(FXTRACE) = 0;
shf_puts(substitute(str_val(global("PS4")), 0), shl_xtrace);
Flag(FXTRACE) = 2;
in_xtrace = false;
}
}
/*

4
sh.h
View File

@@ -169,9 +169,9 @@
#endif
#ifdef EXTERN
__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.713 2015/02/20 07:14:30 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.714 2015/03/01 15:23:05 tg Exp $");
#endif
#define MKSH_VERSION "R50 2015/02/20"
#define MKSH_VERSION "R50 2015/03/02"
/* arithmetic types: C implementation */
#if !HAVE_CAN_INTTYPES