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• Allow setting both -o posix and -o sh (although only in the same

Browse Source 
command; setting one still unsets the other at first)
• Change subst_exstat to be conformant unless -o sh is set and -o posix isn’t
• In lksh, make subst_exstat (newly) conformant if -o posix
• New MKSH_BINSHPOSIX to accompany MKSH_BINSHREDUCED
• Sync lksh manpage precisely
This commit is contained in:
tg 2013-05-02 20:21:45 +00:00
parent f2906c79df
commit f0f34eb7b6
7 changed files with 96 additions and 61 deletions
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9
Build.sh
View File

@ -1,5 +1,5 @@
#!/bin/sh
srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.628 2013/04/27 18:12:37 tg Exp $'
srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.629 2013/05/02 20:21:36 tg Exp $'
#-
# Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
# 2011, 2012, 2013
@ -1367,8 +1367,8 @@ if ac_ifcpp 'ifdef MKSH_SMALL' isset_MKSH_SMALL '' \
check_categories="$check_categories smksh"
HAVE_ISSET_MKSH_CONSERVATIVE_FDS=1 # from sh.h
fi
ac_ifcpp 'ifdef MKSH_BINSHREDUCED' isset_MKSH_BINSHREDUCED '' \
"if a reduced-feature sh is requested" && \
ac_ifcpp 'if defined(MKSH_BINSHPOSIX) || defined(MKSH_BINSHREDUCED)' \
isset_MKSH_BINSH '' 'if invoking as sh should be handled specially' && \
check_categories="$check_categories binsh"
ac_ifcpp 'ifdef MKSH_UNEMPLOYED' isset_MKSH_UNEMPLOYED '' \
"if mksh will be built without job control" && \
@ -1531,7 +1531,7 @@ else
#define EXTERN
#define MKSH_INCLUDES_ONLY
#include "sh.h"
__RCSID("$MirOS: src/bin/mksh/Build.sh,v 1.628 2013/04/27 18:12:37 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/Build.sh,v 1.629 2013/05/02 20:21:36 tg Exp $");
int main(void) { printf("Hello, World!\n"); return (0); }
EOF
case $cm in
@ -2315,6 +2315,7 @@ DEBUG_LEAKS enable freeing resources before exiting
MKSHRC_PATH "~/.mkshrc" (do not change)
MKSH_A4PB force use of arc4random_pushb
MKSH_ASSUME_UTF8 (0=disabled, 1=enabled; default: unset)
MKSH_BINSHPOSIX if */sh or */-sh, enable set -o posix
MKSH_BINSHREDUCED if */sh or */-sh, enable set -o sh
MKSH_CLRTOEOL_STRING "\033[K"
MKSH_CLS_STRING "\033[;H\033[J"

24
check.t
View File

@ -1,4 +1,4 @@
# $MirOS: src/bin/mksh/check.t,v 1.609 2013/04/27 19:16:23 tg Exp $
# $MirOS: src/bin/mksh/check.t,v 1.610 2013/05/02 20:21:38 tg Exp $
# $OpenBSD: bksl-nl.t,v 1.2 2001/01/28 23:04:56 niklas Exp $
# $OpenBSD: history.t,v 1.5 2001/01/28 23:04:56 niklas Exp $
# $OpenBSD: read.t,v 1.3 2003/03/10 03:48:16 david Exp $
@ -4254,7 +4254,7 @@ description:
should print 0 according to POSIX (dash, bash, ksh93, posh)
but not 0 according to the getopt(1) manual page, ksh88, and
Bourne sh (such as /bin/sh on Solaris).
In mksh R39b, we honour POSIX except when -o sh is set.
We honour POSIX except when -o sh is set.
category: shell:legacy-no
stdin:
showf() {
@ -4274,10 +4274,15 @@ stdin:
showf
set -- `false`
echo rv=$?
set -o posix -o sh
showf
set -- `false`
echo rv=$?
expected-stdout:
FPOSIX=0 FSH=0 rv=0
FPOSIX=0 FSH=1 rv=1
FPOSIX=1 FSH=0 rv=0
FPOSIX=1 FSH=1 rv=0
---
name: regression-10-legacy
description:
@ -4306,10 +4311,15 @@ stdin:
showf
set -- `false`
echo rv=$?
set -o posix -o sh
showf
set -- `false`
echo rv=$?
expected-stdout:
FPOSIX=0 FSH=0 rv=1
FPOSIX=0 FSH=1 rv=1
FPOSIX=1 FSH=0 rv=1
FPOSIX=1 FSH=0 rv=0
FPOSIX=1 FSH=1 rv=0
---
name: regression-11
description:
@ -6187,7 +6197,7 @@ expected-stdout:
---
name: sh-mode-2a
description:
Check that sh mode is *not* automatically turned on
Check that posix or sh mode is *not* automatically turned on
category: !binsh
stdin:
ln -s "$__progname" ksh || cp "$__progname" ksh
@ -6196,7 +6206,7 @@ stdin:
ln -s "$__progname" ./-sh || cp "$__progname" ./-sh
for shell in {,-}{,k}sh; do
print -- $shell $(./$shell +l -c \
'[[ $(set +o) == *@(-o sh)@(| *) ]] && echo sh || echo nosh')
'[[ $(set +o) == *"-o "@(sh|posix)@(| *) ]] && echo sh || echo nosh')
done
expected-stdout:
sh nosh
@ -6206,7 +6216,7 @@ expected-stdout:
---
name: sh-mode-2b
description:
Check that sh mode *is* automatically turned on
Check that posix or sh mode *is* automatically turned on
category: binsh
stdin:
ln -s "$__progname" ksh || cp "$__progname" ksh
@ -6215,7 +6225,7 @@ stdin:
ln -s "$__progname" ./-sh || cp "$__progname" ./-sh
for shell in {,-}{,k}sh; do
print -- $shell $(./$shell +l -c \
'[[ $(set +o) == *@(-o sh)@(| *) ]] && echo sh || echo nosh')
'[[ $(set +o) == *"-o "@(sh|posix)@(| *) ]] && echo sh || echo nosh')
done
expected-stdout:
sh sh

9
funcs.c
View File

@ -38,7 +38,7 @@
#endif
#endif
__RCSID("$MirOS: src/bin/mksh/funcs.c,v 1.242 2013/04/26 21:22:45 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/funcs.c,v 1.243 2013/05/02 20:21:41 tg Exp $");
#if HAVE_KILLPG
/*
@ -2426,12 +2426,13 @@ c_set(const char **wp)
* which assumes the exit value set will be that of the $()
* (subst_exstat is cleared in execute() so that it will be 0
* if there are no command substitutions).
* Switched ksh (!posix !sh) to POSIX in mksh R39b.
*/
#ifdef MKSH_LEGACY_MODE
return (subst_exstat);
/* traditional behaviour, unless set -o posix */
return (Flag(FPOSIX) ? 0 : subst_exstat);
#else
return (Flag(FSH) ? subst_exstat : 0);
/* conformant behaviour, unless set -o sh +o posix */
return (Flag(FSH) && !Flag(FPOSIX) ? subst_exstat : 0);
#endif
}

71
lksh.1
View File

@ -1,4 +1,4 @@
.\" $MirOS: src/bin/mksh/lksh.1,v 1.3 2013/04/27 19:16:25 tg Exp $
.\" $MirOS: src/bin/mksh/lksh.1,v 1.4 2013/05/02 20:21:43 tg Exp $
.\"-
.\" Copyright (c) 2008, 2009, 2010, 2012, 2013
.\" Thorsten “mirabilos” Glaser <tg@mirbsd.org>
@ -72,7 +72,7 @@
.\" with -mandoc, it might implement .Mx itself, but we want to
.\" use our own definition. And .Dd must come *first*, always.
.\"
.Dd $Mdocdate: April 27 2013 $
.Dd $Mdocdate: May 2 2013 $
.\"
.\" Check which macro package we use, and do other -mdoc setup.
.\"
@ -184,7 +184,7 @@ is not suitable for use as
.Pa /bin/sh .
.It
There is no explicit support for interactive use,
nor any command line editing code.
nor any command line editing or history code.
Hence,
.Nm
is not suitable as a user's login shell, either; use
@ -200,19 +200,43 @@ as
instead of
.Dq MIRBSD KSH .
.It
Some
.Nm mksh
specific extensions are missing; specifically, the
.Fl T
command-line option.
.Nm
only offers the traditional ten file descriptors to scripts.
.It
Some extensions from other shells, such as
.Nm
uses
.Tn POSIX
arithmetics, which has quite a few implications:
The data type for arithmetics is the host ISO C
.Vt long
data type.
Signed integer wraparound is Undefined Behaviour.
The sign of the result of a modulo operation with at least one
negative operand is unspecified.
Shift operations on negative numbers are unspecified.
Division of the largest negative number by \-1 is Undefined Behaviour.
The compiler is permitted to delete all data and crash the system
if Undefined Behaviour occurs.
.It
The rotation arithmetic operators are not available.
.It
The shift arithmetic operators take all bits of the second operand into
account; if they exceed permitted precision, the result is unspecified.
.It
The
.Tn GNU
.Nm bash ,
which
.Nm mksh
provides, are missing, for increased compatibility with legacy scripts.
.Nm bash
extension &\*(Gt to redirect stdout and stderr in one go is not parsed.
.It
The
.Nm mksh
command line option
.Fl T
is not available.
.It
Unless
.Ic set -o posix
is active,
.Nm
always uses traditional mode for constructs like:
.Bd -literal -offset indent
@ -230,27 +254,6 @@ unlike
.At
.Nm ksh ,
does not keep file descriptors \*(Gt 2 private.
.It
Integers use the host C environment's
.Vt long
type, not
.Vt int32_t .
Unsigned arithmetic is done using
.Vt unsigned long ,
not
.Vt uint32_t .
Neither value limits nor wraparound is guaranteed.
Dividing the largest negative number by \-1 is Undefined Behaviour
.Po
but might work on 32-bit and 64-bit
.Vt long
types
.Pc .
POSIX, by virtue of including ISO C, makes it legal for code triggering
Undefined Behaviour to remove all your data and crash the system!
.It
.Nm
only offers the traditional ten file descriptors to scripts.
.El
.Sh SEE ALSO
.Xr mksh 1

15
main.c
View File

@ -34,7 +34,7 @@
#include <locale.h>
#endif
__RCSID("$MirOS: src/bin/mksh/main.c,v 1.263 2013/04/27 18:56:41 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/main.c,v 1.264 2013/05/02 20:21:43 tg Exp $");
extern char **environ;
@ -251,10 +251,19 @@ main_init(int argc, const char *argv[], Source **sp, struct block **lp)
if (argi < 0)
return (1);
#if defined(MKSH_BINSHPOSIX) || defined(MKSH_BINSHREDUCED)
/* are we called as -sh or /bin/sh or so? */
if (!strcmp(ccp, "sh")) {
/* either also turns off braceexpand */
#ifdef MKSH_BINSHPOSIX
/* enable better POSIX conformance */
change_flag(FPOSIX, OF_FIRSTTIME, true);
#endif
#ifdef MKSH_BINSHREDUCED
/* set FSH if we're called as -sh or /bin/sh or so */
if (!strcmp(ccp, "sh"))
/* enable kludge/compat mode */
change_flag(FSH, OF_FIRSTTIME, true);
#endif
}
#endif
}

23
misc.c
View File

@ -30,7 +30,7 @@
#include <grp.h>
#endif
__RCSID("$MirOS: src/bin/mksh/misc.c,v 1.210 2013/04/27 19:09:13 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/misc.c,v 1.211 2013/05/02 20:21:44 tg Exp $");
#define KSH_CHVT_FLAG
#ifdef MKSH_SMALL
@ -277,11 +277,10 @@ change_flag(enum sh_flag f, int what, bool newset)
setgid(kshegid);
#endif
} else if ((f == FPOSIX || f == FSH) && newval) {
Flag(FPOSIX) = Flag(FSH) = Flag(FBRACEEXPAND) = 0;
Flag(f) = newval;
}
/* Changing interactive flag? */
if (f == FTALKING) {
/* Turning on -o posix or -o sh? */
Flag(FBRACEEXPAND) = 0;
} else if (f == FTALKING) {
/* Changing interactive flag? */
if ((what == OF_CMDLINE || what == OF_SET) && procpid == kshpid)
Flag(FTALKING_I) = newval;
}
@ -306,6 +305,7 @@ parse_args(const char **argv,
size_t i;
int optc, arrayset = 0;
bool sortargs = false;
bool fcompatseen = false;
/* First call? Build option strings... */
if (cmd_opts[0] == '\0') {
@ -379,6 +379,17 @@ parse_args(const char **argv,
break;
}
i = option(go.optarg);
if ((i == FPOSIX || i == FSH) && set && !fcompatseen) {
/*
* If running 'set -o posix' or
* 'set -o sh', turn off the other;
* if running 'set -o posix -o sh'
* allow both to be set though.
*/
Flag(FPOSIX) = 0;
Flag(FSH) = 0;
fcompatseen = true;
}
if ((i != (size_t)-1) && (set ? 1U : 0U) == Flag(i))
/*
* Don't check the context if the flag

6
sh_flags.h
View File

@ -1,5 +1,5 @@
#if defined(SHFLAGS_DEFNS)
__RCSID("$MirOS: src/bin/mksh/sh_flags.h,v 1.12 2012/06/28 20:14:17 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/sh_flags.h,v 1.13 2013/05/02 20:21:45 tg Exp $");
#define FN(sname,cname,ochar,flags) /* nothing */
#elif defined(SHFLAGS_ENUMS)
#define FN(sname,cname,ochar,flags) cname,
@ -88,7 +88,7 @@ FN("nounset", FNOUNSET, 'u', OF_ANY)
/* ./. don't do logical cds/pwds (non-standard) */
FN("physical", FPHYSICAL, 0, OF_ANY)
/* ./. pdksh compat: somewhat more POSIXish mode (non-standard) */
/* ./. adhere more closely to POSIX even when undesirable */
FN("posix", FPOSIX, 0, OF_ANY)
/* -p use suid_profile; privileged shell */
@ -97,7 +97,7 @@ FN("privileged", FPRIVILEGED, 'p', OF_ANY)
/* -r restricted shell */
FN("restricted", FRESTRICTED, 'r', OF_CMDLINE)
/* ./. pdksh compat: called as sh not mksh; kludge mode (non-standard) */
/* ./. kludge mode for better compat with traditional sh (OS-specific) */
FN("sh", FSH, 0, OF_ANY)
/* -s (invocation) parse stdin (pseudo non-standard) */