Commit Graph

16722 Commits

Author SHA1 Message Date
Denys Vlasenko
df1f479fc5 randomconfig fixes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-23 03:13:55 +02:00
Denys Vlasenko
6eb38fded2 randomconfig fixes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-23 02:46:53 +02:00
Stefan Agner
62744efa47 examples/udhcp/simple.script: fix IPv6 support when using udhcpc
The udhcpc script calls ip addr flush .. which flushes addresses
of any address family, including IPv6. However, busybox udhcpc is
IPv4 only and should not influence IPv6 addressing. Hence use ip
addr flush with family constraint.

The script particularly broke IPv6 SLAAC: Typically when udhcpc
calls the script the kernel already assigned the IPv6 link-local
address. The flush removes the link-local IPv6 address again and
prohibits proper IPv6 operation such as SLAAC since neighbor
discovery protocol relies on IPv6 link-local addressing.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
[Taken from https://git.openembedded.org/openembedded-core/commit/meta/recipes-core/busybox/files/simple.script?id=b77541dbb2f442e51842f9d24c8745a6df2d1478]
Signed-off-by: Quentin Schulz <quentin.schulz@streamunlimited.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-21 03:02:02 +02:00
Uwe Glaeser
faab906d28 udhcpc6: use correct multicast MAC
function                                             old     new   delta
static.MAC_DHCP6MCAST_ADDR                             -       6      +6

Signed-off-by: Uwe Glaeser <uwe.glaeser@dormakaba.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-21 02:56:12 +02:00
Denys Vlasenko
4789c7cd81 nmeter: add %T (zero-based timestamp) format
function                                             old     new   delta
collect_tv                                             -     132    +132
collect_monotonic                                      -      61     +61
nmeter_main                                          754     778     +24
gmtime                                                 -      21     +21
init_monotonic                                         -      18     +18
init_functions                                        44      48      +4
packed_usage                                       33432   33420     -12
collect_time                                         125      19    -106
------------------------------------------------------------------------------
(add/remove: 5/0 grow/shrink: 2/2 up/down: 260/-118)          Total: 142 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-10 15:37:39 +02:00
Biswapriyo Nath
505eeae402 Makefile.flags: restrict Wno-constant-logical-operand and Wno-string-plus-int options for clang
these options were added in b4ef2e3467 commit
gcc shows unrecognized command-line option warnings

Signed-off-by: Biswapriyo Nath <nathbappai@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-10 14:33:19 +02:00
Sören Tempel
0356607264 deluser: check if specified home is a directory before removing it
On Alpine, some users use /dev/null as a home directory. When removing
such a user with `deluser --remove-home` this causes the /dev/null
device file to be removed which is undesirable. To prevent this pitfall,
check if the home directory specified for the user is an actual
directory (or a symlink to a directory).

Implementations of similar tools for other operating systems also
implement such checks. For instance, the OpenBSD rmuser(1)
implementation [0].

[0]: b69faa6c70/usr.sbin/adduser/rmuser.perl (L143-L151)

function                                             old     new   delta
deluser_main                                         337     380     +43

Signed-off-by: Sören Tempel <soeren+git@soeren-tempel.net>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09 18:04:31 +02:00
Martin Lewis
d30d1ebc11 dhcpc: refactor xmalloc_optname_optval to shrink binary size
function                                             old     new   delta
len_of_option_as_string                               14      13      -1
dhcp_option_lengths                                   14      13      -1
udhcp_str2optset                                     641     637      -4
static.xmalloc_optname_optval                        777     718     -59
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-65)             Total: -65 bytes

Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09 17:59:56 +02:00
Ron Yorston
17764603f2 httpd: allow '-h' to work when daemonized with NOMMU enabled
Commit d1b75e184 (httpd: permit non-default home directory with NOMMU
enabled) only works when used with the '-f' (foreground) option.

When '-f' isn't specified and NOMMU is enabled bb_daemonize_or_rexec()
is called to daemonize the server.  Since the server process has been
re-execed the previous patch results in the xchdir() not being called.

Fix this by resetting the re_execed variable in this case.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09 17:38:21 +02:00
Denys Vlasenko
0cad5f9b6d udhcp: comment out unused domain compression code
function                                             old     new   delta
attach_option                                        411     406      -5
dname_enc                                            381     167    -214
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-219)           Total: -219 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09 17:22:06 +02:00
Denys Vlasenko
002be6e821 sysctl: do report EACCES errors on write
function                                             old     new   delta
sysctl_act_recursive                                 165     179     +14
sysctl_act_on_setting                                467     471      +4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 18/0)               Total: 18 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09 15:58:32 +02:00
Mark Edgar
b2ab920716 unexpand: correct behavior for --first-only --tabs=4
Prior to the patch, both -f and --first-only are in all cases either
no-op or ignored.
Without --tabs, --first-only is the default so specifying it is a no-op.
With --tabs, --all is implied, and --first-only is intended to reset this.

function                                             old     new   delta
expand_main                                          690     694      +4

Signed-off-by: Mark Edgar <medgar123@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09 15:40:49 +02:00
Martin Lewis
9b4a9d96b8 xstrndup: Use strndup instead of implementing it.
Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09 01:55:59 +02:00
Martin Lewis
726d0d148b dhcpc: code shrink in good_hostname
Incorporated valid_domain_label into good_hostname to simplify the implementation.

function                                             old     new   delta
static.xmalloc_optname_optval                        973     958     -15
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-15)             Total: -15 bytes
   text	   data	    bss	    dec	    hex	filename
 993144	  16915	   1872	1011931	  f70db	busybox_old
 993129	  16915	   1872	1011916	  f70cc	busybox_unstripped

Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09 01:49:10 +02:00
Denys Vlasenko
6f7a009649 awk: disallow "str"++, closes bug 12981
function                                             old     new   delta
parse_expr                                           887     896      +9

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09 01:33:54 +02:00
Dimitri John Ledkov
45fa3f18ad wget: implement TLS verification with ENABLE_FEATURE_WGET_OPENSSL
When ENABLE_FEATURE_WGET_OPENSSL is enabled, correctly implement TLS
verification by default. And only ignore verification errors, if
--no-check-certificate was passed.

Also note, that previously OPENSSL implementation did not implement
TLS verification, nor printed any warning messages that verification
was not performed.

Bug-Ubuntu: https://bugs.launchpad.net/bugs/1879533

CVE-2018-1000500

Signed-off-by: Dimitri John Ledkov <xnox@ubuntu.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-05-20 15:10:44 +02:00
Ron Yorston
9f3b410006 ash,hush: drop pointer check before calls to show_history
show_history() checks that its argument in non-null so there's
no need to repeat the test at call sites.

function                                             old     new   delta
historycmd                                            25      17      -8
builtin_history                                       29      21      -8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-16)             Total: -16 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-04-30 17:30:02 +02:00
Ron Yorston
981b2eff81 mim: run scripts from a specification file
mim runs scripts from a specification file which can be thought
of as an extremely limited Makefile. Neither make variables nor
dependencies are supported. By default the file 'Mimfile' is read.
An example:

   hello:
      echo hello $1

   clean:
      rm -rf *

The command 'mim' or 'mim hello' will echo 'hello'. Unlike 'make'
arguments after the first are available to the script; they don't
specify additional targets.

mim isn't enabled by default.  Enabling it increases the size of the
binary by about 500 bytes.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-04-30 17:23:08 +02:00
Ron Yorston
da7a6dbfa5 ash: fix build failure when command built-in is disabled
Since commit 7eb8eecbb (ash: eval: Add assignment built-in support
again) building BusyBox with the 'command' built-in disabled fails.

parse_command_args() only needs to be called when the 'command'
built-in is run.  Which it won't be if it's disabled.

v2: Avoiding infinite loops is good, too.  Thanks, Harald van Dijk.

Reported-by: Deweloper <deweloper@wp.pl>
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-04-30 16:42:58 +02:00
Ron Yorston
d1b75e1842 httpd: permit non-default home directory with NOMMU enabled
When BusyBox is compiled with NOMMU enabled running httpd with
the '-h' option fails even if the specified directory exists:

   $ ls -d www
   www
   $ busybox httpd  -fvvvp 8080 -h www
   ...
   ... try to access http://localhost:8080/www
   ...
   httpd: can't change directory to 'www': No such file or directory

The parent process executes xchdir("www").  When a connection is accepted
it's handled by re-executing httpd in inetd mode.  The child process
inherits the current directory "www" and tries to change directory again
to "www", which fails.

Omit the call to xchdir() when httpd is re-executed.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-04-30 16:37:44 +02:00
Sören Tempel
42a8984abc grep: add proper support for pattern_list
From POSIX.1-2008:

	The pattern_list's value shall consist of one or more patterns
	separated by <newline> characters;

As such, given patterns need to be split at newline characters. Without
doing so, busybox grep will interpret the newline as part of the pattern
which is not in accordance with POSIX.

See also: https://bugs.busybox.net/show_bug.cgi?id=12721

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-04-30 00:20:18 +02:00
Gray Wolf
c3295d233b grep: Fix -f FILE when FILE is empty and -x provided
Grep currently special-cased empty pattern file to be the same as
pattern file with one empty line (empty pattern). That does mirror how
GNU grep behaves, except when -x is provided. In that case .* pattern
needs to be used instead.

Signed-off-by: Gray Wolf <wolf@wolfsden.cz>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-04-29 16:01:42 +02:00
Ron Yorston
1c462d47a0 xargs: restore correct behaviour of -n option
Since commit 1ff7002b1 (xargs: fix handling of quoted arguments, closes
11441) the -n option hasn't worked properly:

   $ echo 1 2 3 | xargs -n 1 echo
   1
   2

   3

   $

Because state is now remembered between calls to process_stdin() it's
necessary to update the state before any premature return.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-04-29 15:53:51 +02:00
Jean-Philippe Brucker
ed8af51b60 build system: remove KBUILD_STR()
When using GNU Make >=4.3, the KBUILD_STR() definition interferes badly
with dependency checks during build, and forces a complete rebuild every
time Make runs.

In if_changed_rule, Kconfig checks if the command used to build a file
has changed since last execution. The previous command is stored in the
generated .<file>.o.cmd file. For example applets/.applets.o.cmd defines
a "cmd_applets/applets.o" variable:

	cmd_applets/applets.o := gcc ... -D"KBUILD_STR(s)=#s" ...

Here the '#' should be escaped with a backslash, otherwise GNU Make
interprets it as starting a comment, and ignore the rest of the
variable. As a result of this truncation, the previous command doesn't
equal the new command and Make rebuilds each target.

The problem started to appear when GNU Make 4.3 (released January 2020),
introduced a backward-incompatible fix to macros containing a '#'. While
the above use of '#', a simple Make variable, still needs to be escaped,
a '#' within a function invocation doesn't need to be escaped anymore.
As Martin Dorey explained on the GNU Make discussion [1], the above
declaration is generated from make-cmd, defined as:

	make-cmd = $(subst \#,\\\#,$(subst $$,$$$$,$(call escsq,$(cmd_$(1))))

Since GNU Make 4.3, the first argument of subst should not have a
backslash. make-cmd now looks for literally \# and doesn't find it, and
as a result doesn't add the backslash when generating .o.cmd files.

[1] http://savannah.gnu.org/bugs/?20513

We could fix it by changing make-cmd to "$(subst #,\#,...)", but to
avoid compatibility headaches, simply get rid of the KBUILD_STR
definition, as done in Linux by b42841b7bb62 ("kbuild: Get rid of
KBUILD_STR"). Quote the string arguments directly rather than asking the
preprocessor to quote them.

Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-04-29 14:52:19 +02:00
Lauri Kasanen
b9943741c2 unzip: -d should create the dir
The official Info-Zip unzip creates the dir if it doesn't exist.

Signed-off-by: Lauri Kasanen <cand@gmx.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-04-29 14:37:21 +02:00
Denys Vlasenko
9aa751b08a shells: fix exitcode_trapN tests to avoid races
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-26 09:05:52 +01:00
Denys Vlasenko
1555895b4a ash: expand: Fix multiple issues with EXP_DISCARD in evalvar
Upstream commit:

    Date: Wed, 12 Sep 2018 14:27:16 +0800
    expand: Fix multiple issues with EXP_DISCARD in evalvar

    The commit 3cd538634f71538370f5af239f342aec48b7470b broke parameter
    expansion in multiple ways because the EXP_DISCARD flag wasn't set
    or tested for various cases:

            $ src/dash -c 'var=; echo ${var:+nonempty}'
            nonempty
            $ src/dash -u -c 'unset foo bar; echo ${foo+${bar}}'
            dash: 1: bar: parameter not set
            $ src/dash -c 'foo=bar; echo ${foo=BUG}; echo $foo'
            barBUG
            bar
            $

    This patch fixes them by introducing a new discard variable that
    tracks whether the extra word should be discarded or not when it
    is parsed.

    Reported-by: Martijn Dekker <martijn@inlv.org>
    Fixes: 3cd538634f71 ("expand: Do not reprocess data when...")
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
    Reported-by: Martijn Dekker <martijn@inlv.org>
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-24 19:20:51 +01:00
Denys Vlasenko
823318822c ash: expand: Do not reprocess data when expanding words
Upstream patch:

    Date: Wed, 30 May 2018 02:06:03 +0800
    expand: Do not reprocess data when expanding words

    Currently various paths will reprocess data when performing word
    expansion.  For example, expari will skip backwards looking for
    the start of the arithmetic expansion, while evalvar will skip
    unexpanded words manually.

    This is cumbersome and error-prone.  This patch fixes this by
    making word expansions proceed in a linear fashion.  This means
    changing argstr and the various expansion functions such as expari
    and subevalvar to return the next character to be expanded.

    This is inspired by similar code from FreeBSD.  However, we take
    things one step further and completely remove the manual word
    skipping in evalvar.  This is accomplished by introducing a new
    EXP_DISCARD flag that tells argstr to only parse and not produce
    any actual expansions.

    Incidentally, argstr will now always NUL-terminate the expansion
    unless the EXP_WORD flag is set.  This is because all but one
    caller of argstr wants the result to be NUL-termianted.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Also includes two one-line follow-up fixes:

    expand: Eat closing brace for length parameter
            if (subtype == VSLENGTH) {
    +               p++;
                    if (flag & EXP_DISCARD)
    expand: Fix double-decrement in argstr
    -               newloc = expdest - (char *)stackblock() - end;
    +               newloc = q - (char *)stackblock() - end;

and changes in code for bash substring extensions.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-24 19:20:51 +01:00
Ron Yorston
6cda0b04a3 ash: move TRACE statement in evalcommand()
Following recent work on evalcommand() a TRACE statement to report
the status of a forked command was left in the wrong place.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-24 12:52:41 +01:00
Denys Vlasenko
7f19848552 ash: rename some function parameters to match dash
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-24 12:48:33 +01:00
Denys Vlasenko
538ee4102b ash: rename stack_nputstr() back to stnputs() to match dash
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-24 12:47:19 +01:00
Denys Vlasenko
c2058ec98c ash: Expand here-documents in the current shell environment
Upstream commit:

    Date: Sun, 11 Nov 2007 15:27:00 +0800
    Expand here-documents in the current shell environment

    Previously we always expanded here-documents in a subshell.  This is
    contrary to the POSIX specification and how other shells behave.  What's
    more this slows down many expansions due to the extra fork (however, it
    must be said that it is possible for it speed up certain expansions by
    running it simultaneously with the command on two CPUs).

    This patch move the expansion into the current shell environment.

    Test case:

            unset a
            cat <<- EOF > /dev/null
                    ${a=NOT}
            EOF
            echo ${a}BAD

    Old result:

            BAD

    New result:

            NOTBAD

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-22 20:29:36 +01:00
Denys Vlasenko
c08993f40c ash: parser: Do not push token back before parseheredoc
Upstream commit:

    Date: Mon, 19 Nov 2018 18:43:58 +0800
    parser: Do not push token back before parseheredoc

    When we read the first token in list() we use peektoken instead
    of readtoken as the following code needs to use the same token
    again.  However, this is wrong when we're in a here-document as
    it will clobber the saved token without resetting the tokpushback
    flag.

    This patch fixes it by doing the tokpushback after parseheredoc
    and setting lasttoken again if parseheredoc was called.

    Reported-by: Ron Yorston <rmy@frippery.org>
    Fixes: 7c245aa8ed33 ("[PARSER] Simplify EOF/newline handling in...")
    Fixes: ee5cbe9fd6bc ("[SHELL] Optimize dash -c "command" to avoid a fork")
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
    Tested-by: Simon Ser <contact@emersion.fr>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-22 17:26:23 +01:00
Denys Vlasenko
9a1a659707 ash: parser: Fix old-style command substitution here-document crash
Upstream commit:

    Date: Fri, 29 Mar 2019 13:49:59 +0800
    parser: Fix old-style command substitution here-document crash

    ... This is caused by the recent change to
    save/restore here-docment list around command substitutions.  In
    doing so we must finish existing here-documents prior to restoring
    the old here-document list.  This is done for new-style command
    substitutions but not for old-style.

    This patch fixes it by doing it for both.

    Fixes: 51e2d88d6e51 ("parser: Save/restore here-documents in...")
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-22 16:39:27 +01:00
Denys Vlasenko
e4a0612efd hush: fix negative_arith.tests: glob-protect dash in "$((arith))"
function                                             old     new   delta
expand_vars_to_list                                 1026    1082     +56
parse_dollar                                         810     811      +1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 57/0)               Total: 57 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-21 17:21:34 +01:00
Denys Vlasenko
45dd87aac0 ash: expand: Ensure result is escaped in cvtnum
Upstream commit:

    Date: Fri, 1 Jun 2018 18:25:29 +0800
    expand: Ensure result is escaped in cvtnum

    The minus sign generated from arithmetic expansion is currently
    unquoted which causes anomalies when the result is used in where
    the quoting matters.

    This patch fixes it by explicitly calling memtodest on the result
    in cvtnum.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-21 16:30:44 +01:00
Denys Vlasenko
da2e46dff6 ash: memalloc: Avoid looping in growstackto
Upstream commit:

    Date: Thu, 31 May 2018 01:51:48 +0800
    memalloc: Avoid looping in growstackto

    Currently growstackto will repeatedly call growstackblock until
    the requisite size is obtained.  This is wasteful.  This patch
    changes growstackblock to take a minimum size instead.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-21 15:25:37 +01:00
Denys Vlasenko
3ced804e31 hush: make "exit" in trap use pre-trap exitcode - fix for nested trap
function                                             old     new   delta
check_and_run_traps                                  276     278      +2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-21 02:55:53 +01:00
Denys Vlasenko
cc9ecd9af1 hush: make "exit" in trap use pre-trap exitcode
function                                             old     new   delta
check_and_run_traps                                  259     276     +17
builtin_exit                                          42      53     +11
hush_main                                           1086    1096     +10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 38/0)               Total: 38 bytes

Fixes exitcode_trap2.tests.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-21 02:18:06 +01:00
Denys Vlasenko
f977e004ce ash: eval: Only restore exit status on exit/return
Upstream commit:

    Date: Fri, 14 Dec 2018 13:52:02 +0800
    eval: Only restore exit status on exit/return

    We unconditionally restore the saved status in exitreset, which
    is incorrect as we only want to do it for exitcmd and returncmd.
    This patch fixes the problem by introducing EXEND.

    Reported-by: Martijn Dekker <martijn@inlv.org>
    Fixes: da30b4b78769 ("[BUILTIN] Exit without arguments in a trap...")
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-20 16:54:29 +01:00
Denys Vlasenko
cd24a50633 ash: Return without arguments in a trap should use status outside traps
Fixes exitcode_trap4.tests.
Upstream commit:

    Date: Mon, 6 Oct 2014 21:51:26 +0800
    Return without arguments in a trap should use status outside traps

    POSIX now requires that return without arguments in a trap should
    return the last command status prior to executing traps.  This
    patch implements this behaviour.

    Incidentally this also changes the behaviour of return without
    arguments in a loop conditional to use the last exit status in
    the body as opposed to the last command in the conditional when
    there is one.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-20 16:47:01 +01:00
Denys Vlasenko
bb095f4838 hush: implement "return NUM in trap sets $? after trap"
function                                             old     new   delta
builtin_return                                        47      67     +20
check_and_run_traps                                  243     259     +16
run_pipe                                            1583    1597     +14
hush_main                                           1076    1086     +10
run_list                                            1054    1055      +1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 5/0 up/down: 61/0)               Total: 61 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-20 16:37:59 +01:00
Ron Yorston
d5bfe26c45 ash: return exit status of nofork applets (again)
Since commit d81af7216 (ash: eval: Reap zombies after built-in commands
and functions) if the shell is compiled with SH_STANDALONE and SH_NOFORK
enabled nofork applets potentially return the incorrect status.

The status value returned by evalcommand() in this case is obtained from
exitstatus in a call to waitforjob(NULL).  This overwrites the status
set for nonfork applets.

If this commit seems familiar it's essentially a reversion of commit
5ccb0e92fa (ash: return exit status of nofork applets).  What was correct
in 2016 is wrong in 2020 and vice versa.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-20 10:39:46 +01:00
Denys Vlasenko
ecc85832f8 ash: expand: Merge syntax/quotes in memtodest with flags
Upstream commit:

    Date: Mon, 28 May 2018 00:17:39 +0800
    expand: Merge syntax/quotes in memtodest with flags

    The function arguments syntax and quotes are both derived from
    the expansion flags.  As syntax is only used by memtodest we do
    not need to maintain it outside of the function at all.

    The only place that uses something other than BASESYNTAX or DQSYNTAX
    is exptilde.  However in that case DQSYNTAX has exactly the same
    effect as SQSYNTAX.

    This patch merges these two arguments into a single flags.  The
    macro QUOTES_KEEPNUL has been renamed to EXP_KEEPNUL in order
    to keep the namespace separate.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-20 10:37:30 +01:00
Denys Vlasenko
e2dd2afc8e ash: eval: Always set localvar_stop
Upstream commit:

    Date: Thu, 31 May 2018 01:15:34 +0800
    eval: Always set localvar_stop

    The variable localvar_stop is set iff vlocal is true.  gcc doesn't
    get this so we get a spurious warning.

    This patch fixes this by always calling pushlocalvars with vlocal
    and making it only actually do the push if vlocal is non-zero.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-20 10:37:30 +01:00
Denys Vlasenko
3e729102a8 ash: eval: Replace with listsetvar with mklocal/setvareq
Upstream commit:

    Date: Sat, 19 May 2018 02:39:55 +0800
    eval: Replace with listsetvar with mklocal/setvareq

    This patch replaces listsetvar with mklocal/setvareq.  As we now
    determine special built-in status prior to variable assignment, we
    no longer have to do a second pass listsetvar.  Instead we will
    call setvareq directly instead of mklocal when necessary.

    In order to do this mklocal can now take a flag in order to mark
    a variable for export.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-20 09:36:51 +01:00
Denys Vlasenko
54bef2a8ef ash: eval: Fail immediately with redirections errors for simple command
Upstream commit:

    Date: Sat, 19 May 2018 02:39:54 +0800
    eval: Fail immediately with redirections errors for simple command

    Previously, dash would continue to perform variable expansions
    even if a redirection error occured.  This patch changes it so
    that it fails immediately.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-20 09:36:51 +01:00
Denys Vlasenko
7eb8eecbbc ash: eval: Add assignment built-in support again
Upstream commit:

    Date: Sat, 19 May 2018 02:39:52 +0800
    eval: Add assignment built-in support again

    This patch adds assignment built-in support that used to exist
    in dash prior to 0.3.8-15.  This is because it will soon be part
    of POSIX, and the semantics are now much better defined.

    Recognition is done at execution time, so even "command -- export"
    or "var=export; command $var" should work.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-20 09:36:51 +01:00
Denys Vlasenko
c91950f315 ash,hush: testcase for "exit" without arguments in a trap
hush fails this one

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-19 12:10:41 +01:00
Denys Vlasenko
23bc562a05 ash,hush: add comment about masked SIGCHLD, handle SIG_IGNed SIGHUP as in bash
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-02-18 16:46:01 +01:00