oweals/busybox.git
8 years agoash: [EXPAND] Removed herefd hack
Denys Vlasenko [Tue, 25 Oct 2016 19:10:20 +0000 (21:10 +0200)]
ash: [EXPAND] Removed herefd hack

Upstream commit:

    Date: Sun, 11 Nov 2007 15:00:06 +0800
    [EXPAND] Removed herefd hack

    The herefd hack goes back more than a decade.  it limits the amount of
    memory we have to allocate when expanding here-documents by writing the
    result out from time to time.  However, it's no longer safe because the
    stack is used to place intermediate results too and there we certainly
    don't want to write them out should we be short on memory.

    In any case, with today's computers we can afford to keep the entire
    result in memory and write them out at the end.

function                                             old     new   delta
redirect                                            1268    1264      -4
ash_main                                            1485    1478      -7
subevalvar                                          1157    1132     -25
growstackstr                                          54      24     -30
argstr                                              1192    1154     -38
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/5 up/down: 0/-104)           Total: -104 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [SHELL] Move flushall to the point just before _exit
Denys Vlasenko [Tue, 25 Oct 2016 18:49:53 +0000 (20:49 +0200)]
ash: [SHELL] Move flushall to the point just before _exit

Upstream commit:

    We need to flush at the very end in case we've generated any errors
    before that.  The flushall call cannot perform a longjmp so it's
    safe there.

    Date: Sat, 22 Sep 2007 20:50:21 +0800
    [SHELL] Move flushall to the point just before _exit

    We need to flush at the very end in case we've generated any errors
    before that.  The flushall call cannot perform a longjmp so it's
    safe there.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [EVAL] Let funcnode refer to a function definition, not its first command
Denys Vlasenko [Tue, 25 Oct 2016 18:26:02 +0000 (20:26 +0200)]
ash: [EVAL] Let funcnode refer to a function definition, not its first command

Upstream patch:

    Date: Tue, 15 Mar 2011 15:44:47 +0800
    [EVAL] Let funcnode refer to a function definition, not its first command

    It is not unrelated: I changed the meaning of struct funcnode's field n
    to refer to the function definition, rather than the list of the
    function's commands, because I needed to refer to the function
    definition node from evalfun, which only gets passed a funcnode. But it
    is something that could be applied independently (without being useful
    by itself), so I've attached it as a separate patch for easier review.

Signed-off-by: Harald van Dijk <harald@gigawatt.nl>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [REDIR] Remove EMFILE special case
Denys Vlasenko [Tue, 25 Oct 2016 17:04:39 +0000 (19:04 +0200)]
ash: [REDIR] Remove EMFILE special case

Upstream commit:

    Date: Sun, 6 May 2007 12:01:37 +1000
    [REDIR] Remove EMFILE special case

    No caller of copyfd need to ignore EMFILE so we can remove the special
    case and just let it call sh_error on any error.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [EVAL] Check exit for eval NSUBSHELL
Denys Vlasenko [Tue, 25 Oct 2016 16:19:39 +0000 (18:19 +0200)]
ash: [EVAL] Check exit for eval NSUBSHELL

Upstream commit:

    Date: Tue, 6 Jul 2010 17:50:37 +0800
    [PATCH 161/277] [EVAL] Check exit for eval NSUBSHELL

    Example:

    $ dash -c 'set -e; (false); echo here'
    here

    With this commit, dash exits 1 before echo.

    The bug was reported by Stefan Fritsch through
     http://bugs.debian.org/514863

Signed-off-by: Gerrit Pape <pape@smarden.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This was fixed differently in our tree:

    Date:   Fri Sep 16 19:04:02 2016 +0000
    ash: exit after subshell error when errexit option is set

    When "set -e" option is on, shell must exit when any command fails,
    including compound commands of the form (compound-list) executed in a
    subshell. Bash and dash shells have this behaviour.

    Also add a corresponding testcase.

Signed-off-by: Rostislav Skudnov <rostislav@tuxera.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: add comment explaining "set -e; $(cmd)" discrepancy
Denys Vlasenko [Tue, 25 Oct 2016 16:12:15 +0000 (18:12 +0200)]
ash: add comment explaining "set -e; $(cmd)" discrepancy

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: reduce code differences from upstream
Denys Vlasenko [Tue, 25 Oct 2016 15:40:25 +0000 (17:40 +0200)]
ash: reduce code differences from upstream

Upstream commit:

    Date: Wed, 8 Sep 2010 16:21:52 +0800
    [JOBS] Debug compile fix

    No point in tracing a no longer undeclared "ps->cmd", fixes:
    jobs.c: In function \u2018commandtext\u2019:
    jobs.c:1192: error: \u2018ps\u2019 undeclared (first use in this function)
    jobs.c:1192: error: (Each undeclared identifier is reported only once
    jobs.c:1192: error: for each function it appears in.)

Signed-off-by: maximilian attems <max@stro.at>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: remove unused EXSHELLPROC
Denys Vlasenko [Tue, 25 Oct 2016 15:26:56 +0000 (17:26 +0200)]
ash: remove unused EXSHELLPROC

Upstream commit:

    Date: Sun, 28 Nov 2010 20:47:07 +0800
    [BUILTIN] Stop documenting EXSHELLPROC

    At some point between ash 0.3.5-11.0.1 and ash 0.3.8-37, Debian
    ash stopped using the EXSHELLPROC exception to handle shell
    scripts without a magic number.

    Remove all remaining references to it to avoid confusion.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [BUILTIN] Use EXEXIT in place of EXEXEC
Denys Vlasenko [Tue, 25 Oct 2016 15:24:25 +0000 (17:24 +0200)]
ash: [BUILTIN] Use EXEXIT in place of EXEXEC

Upstream commit:

    Date: Sun, 28 Nov 2010 20:44:37 +0800
    [BUILTIN] Use EXEXIT in place of EXEXEC

    The intended semantics of EXEXEC are identical to EXEXIT, so
    simplify by using EXEXIT directly.

    Functional change: in edge cases (exec within a trap handler),
    this causes the exit status from exec not to be clobbered.
    For example, without this patch:

     $ sh -c 'trap "exec nonexistent" EXIT'; echo $?
     exec: 1: nonexistent: not found
     0

    And with it:

     $ sh -c 'trap "exec nonexistent" EXIT'; echo $?
     exec: 1: nonexistent: not found
     127

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash,hush: set exit code 127 in "sh /does/not/exist" case
Denys Vlasenko [Tue, 25 Oct 2016 15:00:13 +0000 (17:00 +0200)]
ash,hush: set exit code 127 in "sh /does/not/exist" case

Upstream commit 1 for ash:

    [ERROR] Allow the originator of EXERROR to set the exit status

    Some errors have exit status values specified by POSIX and it is
    therefore desirable to be able to set the exit status at the EXERROR
    source rather than in main.c.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Upstream commit 2 for ash:

    [INPUT] Use exit status 127 when the script to run does not exist

    This commit makes dash exit with return code 127 instead of 2 if
    started as non-interactive shell with a non-existent command_file
    specified as argument (or a directory), as documented in
     http://www.opengroup.org/onlinepubs/009695399/utilities/sh.html#tag_04_128_14

    The wrong exit code was reported by Clint Adams and Jari Aalto through
     http://bugs.debian.org/548743
     http://bugs.debian.org/548687

Signed-off-by: Gerrit Pape <pape@smarden.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
NB: in fact, http://bugs.debian.org/548687 was not fixed by this:
"sh /dir/" thinks that EISDIR error on read is EOF, and exits 0.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoudhcpc: check read of overload option data byte to be within packet
Denys Vlasenko [Tue, 25 Oct 2016 12:25:52 +0000 (14:25 +0200)]
udhcpc: check read of overload option data byte to be within packet

function                                             old     new   delta
udhcp_get_option                                     220     225      +5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoudhcpc: check read of option length byte to be within packet
Brian Foley [Tue, 25 Oct 2016 12:20:55 +0000 (14:20 +0200)]
udhcpc: check read of option length byte to be within packet

function                                             old     new   delta
udhcp_get_option                                     215     220      +5
udhcp_run_script                                     802     803      +1

Signed-off-by: Brian Foley <bpfoley@google.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agostrings: implement -t radix
Tito Ragusa [Mon, 24 Oct 2016 19:52:10 +0000 (21:52 +0200)]
strings: implement -t radix

v2: minor code cleanup, no changes.
v1: Implement -t radix option.
    Fix help text for -o option.

Signed-off-by: Tito Ragusa <farmatito@tiscali.it>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: explain EXP_REDIR and why we (dont) glob redir filenames
Denys Vlasenko [Mon, 24 Oct 2016 19:12:33 +0000 (21:12 +0200)]
ash: explain EXP_REDIR and why we (dont) glob redir filenames

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoawk: fix segfault on for loop syntax error
Brian Foley [Sat, 15 Oct 2016 13:45:40 +0000 (14:45 +0100)]
awk: fix segfault on for loop syntax error

Parsing "for()" segfaults as awk fails to find loop iteration expressions.

Signed-off-by: Brian Foley <bpfoley@google.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agolineedit: fix completion with applet names. closes 9361
Denys Vlasenko [Sun, 23 Oct 2016 23:25:05 +0000 (01:25 +0200)]
lineedit: fix completion with applet names. closes 9361

Patch by Ron Yorston <rmy@pobox.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: return exit status of nofork applets
Ron Yorston [Thu, 20 Oct 2016 11:24:02 +0000 (12:24 +0100)]
ash: return exit status of nofork applets

The commit 'ash: eval: Return status in eval functions' changed how
exit status is handled in eval functions.  The case of nofork
applets was missed, resulting in the incorrect status potentially
being returned for nofork applets when FEATURE_SH_NOFORK is enabled.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoexamples: update var_service/README again
Denys Vlasenko [Fri, 14 Oct 2016 17:02:11 +0000 (19:02 +0200)]
examples: update var_service/README again

Added "ps -AH e" example

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotypo fixes in doc
Denys Vlasenko [Fri, 14 Oct 2016 16:48:05 +0000 (18:48 +0200)]
typo fixes in doc

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoexamples: update var_service/README again
Denys Vlasenko [Fri, 14 Oct 2016 16:38:08 +0000 (18:38 +0200)]
examples: update var_service/README again

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoexamples: update var_service/README
Denys Vlasenko [Fri, 14 Oct 2016 16:22:50 +0000 (18:22 +0200)]
examples: update var_service/README

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotelnetd: ifdef out a buggy error handling code path
Denys Vlasenko [Thu, 13 Oct 2016 14:17:06 +0000 (16:17 +0200)]
telnetd: ifdef out a buggy error handling code path

Here, not handling the error is would just eat one input 0xff char.
Correct handling would need even more corner case handling,
as-is buggy handling corrupts the buffer.
Since we just been told by kernel that pty is ready,
EAGAIN should not be happening here anyway.

function                                             old     new   delta
telnetd_main                                        1798    1785     -13

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agocpio: fix restoration of file ownership, closes 9306
Denys Vlasenko [Wed, 12 Oct 2016 18:56:46 +0000 (20:56 +0200)]
cpio: fix restoration of file ownership, closes 9306

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotelnet: code shrink
Denys Vlasenko [Wed, 12 Oct 2016 18:42:58 +0000 (20:42 +0200)]
telnet: code shrink

put_iac2(w,c) is mostly used with constants, fold them into one arg

function                                             old     new   delta
put_iac2_merged                                        -      46     +46
telnet_main                                         1603    1583     -20
con_escape                                           285     257     -28
put_iac2                                              50       -     -50
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 0/2 up/down: 46/-98)            Total: -52 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotelnetd: add another handshake example in comments, no code changes
Denys Vlasenko [Wed, 12 Oct 2016 18:09:22 +0000 (20:09 +0200)]
telnetd: add another handshake example in comments, no code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotelnetd: treat all 2-byte IACs in 240..249 range as NOPs.
Denys Vlasenko [Wed, 12 Oct 2016 17:41:33 +0000 (19:41 +0200)]
telnetd: treat all 2-byte IACs in 240..249 range as NOPs.

A bit of future-proofing. Some of them can stand just being ignored.

function                                             old     new   delta
telnetd_main                                        1791    1798      +7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotelnetd: fix corner case of input processing of 0xff bytes
Denys Vlasenko [Wed, 12 Oct 2016 17:13:46 +0000 (19:13 +0200)]
telnetd: fix corner case of input processing of 0xff bytes

I managed to reproduce the bug, with some difficulty.

function                                             old     new   delta
telnetd_main                                        1780    1791     +11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotelnetd: fix a corner case where CRLF->CR translation can misbehave
Denys Vlasenko [Wed, 12 Oct 2016 15:36:57 +0000 (17:36 +0200)]
telnetd: fix a corner case where CRLF->CR translation can misbehave

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotelnetd: fix handling of short writes to pty
Denys Vlasenko [Wed, 12 Oct 2016 12:54:10 +0000 (14:54 +0200)]
telnetd: fix handling of short writes to pty

If a write to pty is short, remove_iacs() can be run on a buffer repeatedly.
This, for example, can eat 0xff chars (IACs, in telnet terms).

Rework the logic to handle IACs in a special "write to pty" function.

function                                             old     new   delta
telnetd_main                                        1662    1750     +88

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agomore: accept and ignore a bunch of options
Denys Vlasenko [Tue, 11 Oct 2016 13:29:38 +0000 (15:29 +0200)]
more: accept and ignore a bunch of options

Alpine Linux stumbled over "more -s":
http://bugs.alpinelinux.org/issues/5190

function                                             old     new   delta
more_main                                            857     872     +15

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoifupdown: rewrite state file atomically
Denys Vlasenko [Sun, 9 Oct 2016 21:04:16 +0000 (23:04 +0200)]
ifupdown: rewrite state file atomically

By user's request.
Decided to not use fcntl(F_SETLKW) in lieu of problems with locking
on networked filesystems. The existence of /var/run/ifstate.new
is treated as a write lock. rename() provides atomicity.

function                                             old     new   delta
ifupdown_main                                       1019    1122    +103

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotcpsvd: don't keep shared fd open if fd limit is reached. closes 9331
Denys Vlasenko [Fri, 7 Oct 2016 13:56:47 +0000 (15:56 +0200)]
tcpsvd: don't keep shared fd open if fd limit is reached. closes 9331

Also, much improved help text.

function                                             old     new   delta
packed_usage                                       30652   30851    +199
tcpudpsvd_main                                      1782    1784      +2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: all blocks in function node copying must be SHELL_ALIGNed
Denys Vlasenko [Fri, 7 Oct 2016 02:28:33 +0000 (04:28 +0200)]
ash: all blocks in function node copying must be SHELL_ALIGNed

Previous commit probably introduced a bug:
non-matching size calculation in size counting and
actual copying caused by SHELL_ALIGN being applied differently!
This won't bite if string sizes are also SHELL_ALIGNed.
Thus fixing.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash testsuite: fix false positives
Denys Vlasenko [Fri, 7 Oct 2016 02:07:05 +0000 (04:07 +0200)]
ash testsuite: fix false positives

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: get rid of two global data variables
Denys Vlasenko [Fri, 7 Oct 2016 02:05:15 +0000 (04:05 +0200)]
ash: get rid of two global data variables

function                                             old     new   delta
calcsize                                             126     147     +21
funcstring_end                                         -       4      +4
sizenodelist                                          28      24      -4
funcstringsize                                         4       -      -4
funcstring                                             4       -      -4
funcblocksize                                          4       -      -4
nodeckstrdup                                          48      39      -9
evaltree                                             828     788     -40
------------------------------------------------------------------------------
(add/remove: 1/3 grow/shrink: 1/4 up/down: 25/-105)           Total: -40 bytes
   text    data     bss     dec     hex filename
 943376     916   14292  958584   ea078 busybox_old
 943344     916   14284  958544   ea050 busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: comment out free(p) just before _exit, tweak some outdated comments
Denys Vlasenko [Fri, 7 Oct 2016 01:17:28 +0000 (03:17 +0200)]
ash: comment out free(p) just before _exit, tweak some outdated comments

Planned to sync exitshell up to dash, turned out ours is better :)

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agowget: there is no -s option in GNU Wget 1.18, we should be compatible
Denys Vlasenko [Tue, 4 Oct 2016 02:23:09 +0000 (04:23 +0200)]
wget: there is no -s option in GNU Wget 1.18, we should be compatible

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agodhcp: merge leases.c and static_leases.c into dhcpd.c
Denys Vlasenko [Mon, 3 Oct 2016 22:51:38 +0000 (00:51 +0200)]
dhcp: merge leases.c and static_leases.c into dhcpd.c

function                                             old     new   delta
send_offer                                           292     461    +169
udhcpd_main                                         1531    1588     +57
read_leases                                          330     332      +2
add_lease                                            314     312      -2
find_lease_by_mac                                     68       -     -68
find_free_or_expired_nip                             174       -    -174
------------------------------------------------------------------------------
(add/remove: 0/4 grow/shrink: 3/1 up/down: 228/-244)          Total: -16 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agodhcp: merge most of static_leases.c into dhcpd.c
Denys Vlasenko [Mon, 3 Oct 2016 22:43:14 +0000 (00:43 +0200)]
dhcp: merge most of static_leases.c into dhcpd.c

function                                             old     new   delta
read_staticlease                                     121     222    +101
add_static_lease                                      48       -     -48
log_static_leases                                     68       -     -68
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 1/0 up/down: 101/-116)          Total: -15 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agodhcp: merge files.c into dhcpd.c
Denys Vlasenko [Mon, 3 Oct 2016 22:37:50 +0000 (00:37 +0200)]
dhcp: merge files.c into dhcpd.c

Added NOINLINE to two function, since my version of gcc would actualy increase
code size otherwise.

I see no size changes.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoexamples: add example of a DHCP server
Denys Vlasenko [Mon, 3 Oct 2016 21:43:44 +0000 (23:43 +0200)]
examples: add example of a DHCP server

As usual, by multiplying directories - "dhcpd_eth0", "dhcpd_wlan1"
you can run many servers on different interfaces.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: add commented-out debug printouts in "memleak" built-in
Denys Vlasenko [Mon, 3 Oct 2016 15:42:53 +0000 (17:42 +0200)]
hush: add commented-out debug printouts in "memleak" built-in

Allocation addresses of malloc() are jittery,
thought I had a mem leak in hush, but it was malloc variability.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: fix a memory corruption when exported variable is modified
Denys Vlasenko [Mon, 3 Oct 2016 13:01:06 +0000 (15:01 +0200)]
hush: fix a memory corruption when exported variable is modified

The construct such as this:

t=1
export t
t=new_value1

had a small probability of momentarily using free()d value.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: fix exitcode on exec failure with EACCES - should be 126
Denys Vlasenko [Sun, 2 Oct 2016 23:01:15 +0000 (01:01 +0200)]
hush: fix exitcode on exec failure with EACCES - should be 126

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosh testsuite: add tests for exitcode on failure to exec
Denys Vlasenko [Sun, 2 Oct 2016 22:55:34 +0000 (00:55 +0200)]
sh testsuite: add tests for exitcode on failure to exec

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoshell: delete all msh tests
Denys Vlasenko [Sun, 2 Oct 2016 22:51:29 +0000 (00:51 +0200)]
shell: delete all msh tests

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush testsuite: fix another false positive
Denys Vlasenko [Sun, 2 Oct 2016 22:14:26 +0000 (00:14 +0200)]
hush testsuite: fix another false positive

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohust testsuite: fix a false positive
Denys Vlasenko [Sun, 2 Oct 2016 22:10:20 +0000 (00:10 +0200)]
hust testsuite: fix a false positive

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash testsuite: add most of hust tests which pass for ash
Denys Vlasenko [Sun, 2 Oct 2016 22:06:55 +0000 (00:06 +0200)]
ash testsuite: add most of hust tests which pass for ash

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [PARSER] Add nlprompt/nlnoprompt helpers
Denys Vlasenko [Sun, 2 Oct 2016 21:47:34 +0000 (23:47 +0200)]
ash: [PARSER] Add nlprompt/nlnoprompt helpers

Upstream commit:

    Date: Mon, 29 Sep 2014 22:53:53 +0800
    [PARSER] Add nlprompt/nlnoprompt helpers

    This patch adds the nlprompt/nlnoprompt helpers to isolate code
    dealing with newlines and prompting.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agowhitespace fixes
Denys Vlasenko [Sun, 2 Oct 2016 20:33:15 +0000 (22:33 +0200)]
whitespace fixes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: add var4.tests, var5.tests
Denys Vlasenko [Sun, 2 Oct 2016 19:13:13 +0000 (21:13 +0200)]
hush: add var4.tests, var5.tests

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: fix var3.tests
Denys Vlasenko [Sun, 2 Oct 2016 19:12:02 +0000 (21:12 +0200)]
hush: fix var3.tests

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosh: do not print empty line at the end of "help" output
Denys Vlasenko [Sun, 2 Oct 2016 16:45:09 +0000 (18:45 +0200)]
sh: do not print empty line at the end of "help" output

It's pointless.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosh testsuite: sync ash-redir/ and hush-redir/
Denys Vlasenko [Sun, 2 Oct 2016 16:32:52 +0000 (18:32 +0200)]
sh testsuite: sync ash-redir/ and hush-redir/

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosh testsuite: sync ash-misc/source* and hush-misc/source*
Denys Vlasenko [Sun, 2 Oct 2016 16:23:14 +0000 (18:23 +0200)]
sh testsuite: sync ash-misc/source* and hush-misc/source*

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosh testsuite: sync ash-vars/ and hush-vars/
Denys Vlasenko [Sun, 2 Oct 2016 16:17:15 +0000 (18:17 +0200)]
sh testsuite: sync ash-vars/ and hush-vars/

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash testsuite: update some of variable tests with newer versions from hush
Denys Vlasenko [Sun, 2 Oct 2016 16:08:04 +0000 (18:08 +0200)]
ash testsuite: update some of variable tests with newer versions from hush

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosh testsuite: create hush-redir/* and move files around
Denys Vlasenko [Sun, 2 Oct 2016 15:55:51 +0000 (17:55 +0200)]
sh testsuite: create hush-redir/* and move files around

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agosh testsuite: create hush-heredoc/* and move files around
Denys Vlasenko [Sun, 2 Oct 2016 15:49:46 +0000 (17:49 +0200)]
sh testsuite: create hush-heredoc/* and move files around

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush testsuite: add many tests from ash testsuite
Denys Vlasenko [Sun, 2 Oct 2016 15:39:31 +0000 (17:39 +0200)]
hush testsuite: add many tests from ash testsuite

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: undo "tokname hack"
Denys Vlasenko [Sun, 2 Oct 2016 14:54:17 +0000 (16:54 +0200)]
ash: undo "tokname hack"

dash has tokendlist[] array to decide which tokens end lists.
We store it as first byte of each tokname_array[i].

Switch to bit array, name it like dash (tokendlist), drop special
1st byte of tokname_array[i]. This brings us closer to dash, and
shrinks the binary, because many more string aliasing opportunities
are now open:

function                                             old     new   delta
pstrcmp1                                               -      16     +16
readtoken1                                          2852    2858      +6
list                                                 326     327      +1
pstrcmp                                               16      15      -1
tokname                                               45      42      -3
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/2 up/down: 23/-4)              Total: 19 bytes
   text    data     bss     dec     hex filename
 943556     916   14292  958764   ea12c busybox_old
 943463     916   14292  958671   ea0cf busybox_unstripped
^^^^^^^ note this!

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: placate gcc: "warning: ! is only applied to the left hand side of =="
Denys Vlasenko [Sun, 2 Oct 2016 13:31:33 +0000 (15:31 +0200)]
ash: placate gcc: "warning: ! is only applied to the left hand side of =="

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush testsuite: add glob_dir.tests
Denys Vlasenko [Sun, 2 Oct 2016 13:20:57 +0000 (15:20 +0200)]
hush testsuite: add glob_dir.tests

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: fix globbing bugs when using glibc glob()
Denys Vlasenko [Sun, 2 Oct 2016 13:17:15 +0000 (15:17 +0200)]
ash: fix globbing bugs when using glibc glob()

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: style fixes
Denys Vlasenko [Sun, 2 Oct 2016 02:38:07 +0000 (04:38 +0200)]
ash: style fixes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: support "--" in "source" builtin
Denys Vlasenko [Sun, 2 Oct 2016 01:16:00 +0000 (03:16 +0200)]
ash: support "--" in "source" builtin

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: expand: Fixed "$@" expansion when EXP_FULL is false
Denys Vlasenko [Sun, 2 Oct 2016 00:46:56 +0000 (02:46 +0200)]
ash: expand: Fixed "$@" expansion when EXP_FULL is false

Upstream commit:

    Date: Thu, 1 Jan 2015 07:53:10 +1100
    expand: Fixed "$@" expansion when EXP_FULL is false

    The commit 3c06acdac0b1ba0e0acdda513a57ee6e31385dce ([EXPAND]
    Split unquoted $@/$* correctly when IFS is set but empty) broke
    the case where $@ is in quotes and EXP_FULL is false.

    In that case we should still emit IFS as field splitting is not
    performed.

Reported-by: Juergen Daubert <jue@jue.li>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotest: fix compile error in last commit
Denys Vlasenko [Sun, 2 Oct 2016 00:35:13 +0000 (02:35 +0200)]
test: fix compile error in last commit

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agotest: memory leak: free group id list
Denys Vlasenko [Sat, 1 Oct 2016 23:49:13 +0000 (01:49 +0200)]
test: memory leak: free group id list

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash,hush: add a test that "continue" does not cripple traps
Denys Vlasenko [Sat, 1 Oct 2016 21:28:02 +0000 (23:28 +0200)]
ash,hush: add a test that "continue" does not cripple traps

Both shells pass this test.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: fix return_in_trap1.tests failure
Denys Vlasenko [Sat, 1 Oct 2016 21:25:12 +0000 (23:25 +0200)]
ash: fix return_in_trap1.tests failure

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash testsuite: add return_in_trap1.tests
Denys Vlasenko [Sat, 1 Oct 2016 20:36:14 +0000 (22:36 +0200)]
ash testsuite: add return_in_trap1.tests

Currently it fails

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: 'return' should have effect earlier
Denys Vlasenko [Sat, 1 Oct 2016 20:28:03 +0000 (22:28 +0200)]
hush: 'return' should have effect earlier

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [EXPAND] Optimise nulonly away and just use quoted as before
Denys Vlasenko [Sat, 1 Oct 2016 19:02:06 +0000 (21:02 +0200)]
ash: [EXPAND] Optimise nulonly away and just use quoted as before

Upstream commit:

    Date: Wed, 8 Oct 2014 20:09:56 +0800
    [EXPAND] Optimise nulonly away and just use quoted as before

    This patch makes a small optimisation by using the same value for
    quoted between evalvar and varvalue by eliminating nulonly and
    passing along quoted instead.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [EXPAND] Do not split quoted VSLENGTH and VSTRIM
Denys Vlasenko [Sat, 1 Oct 2016 18:55:02 +0000 (20:55 +0200)]
ash: [EXPAND] Do not split quoted VSLENGTH and VSTRIM

Upstream patch:

    Date: Wed, 8 Oct 2014 15:42:08 +0800
    [EXPAND] Do not split quoted VSLENGTH and VSTRIM

    Currently VSLENGTH and VSTRIM* are field-split even within quotes.
    This is obviously wrong.  This patch fixes that.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [EXPAND] Split unquoted $@/$* correctly when IFS is set but empty
Denys Vlasenko [Sat, 1 Oct 2016 18:35:10 +0000 (20:35 +0200)]
ash: [EXPAND] Split unquoted $@/$* correctly when IFS is set but empty

Upstream commit:

    Date: Wed, 8 Oct 2014 15:24:23 +0800
    [EXPAND] Split unquoted $@/$* correctly when IFS is set but empty

    Currently we do not field-split $@/$* when it isn't quoted and IFS
    is set but empty.  This is obviously wrong.  This patch fixes this.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: add func6.tests
Denys Vlasenko [Sat, 1 Oct 2016 18:12:10 +0000 (20:12 +0200)]
hush: add func6.tests

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: fix "return N" not setting $? in loop conditionals
Denys Vlasenko [Sat, 1 Oct 2016 17:56:52 +0000 (19:56 +0200)]
ash: fix "return N" not setting $? in loop conditionals

Upstream commit 1:

    Date: Mon, 6 Oct 2014 20:45:04 +0800
    [EVAL] Move common skipcount logic into skiploop

    The functions evalloop and evalfor share the logic on checking
    and updating skipcount.  This patch moves that into the helper
    function skiploop.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Upstream commit 2:

    Date: Mon, 6 Oct 2014 21:22:43 +0800
    [BUILTIN] Allow return in loop conditional to set exit status

    https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=332954

    When return is used in a loop conditional the exit status will
    be lost because we always set the exit status at the end of the
    loop to that of the last command executed in the body.

    This is counterintuitive and contrary to what most other shells do.

    This patch fixes this by always preserving the exit status of
    return when it is used in a loop conditional.

    The patch was originally written by Gerrit Pape <pape@smarden.org>.

Reported-by: Stephane Chazelas <stephane_chazelas@yahoo.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash testsuite: remove two more inadvertent bashisms
Denys Vlasenko [Sat, 1 Oct 2016 15:43:04 +0000 (17:43 +0200)]
ash testsuite: remove two more inadvertent bashisms

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash testsuite: remove two inadvertent bashisms
Denys Vlasenko [Sat, 1 Oct 2016 15:30:21 +0000 (17:30 +0200)]
ash testsuite: remove two inadvertent bashisms

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [ERROR] Set exitstatus in onint
Denys Vlasenko [Sat, 1 Oct 2016 14:03:11 +0000 (16:03 +0200)]
ash: [ERROR] Set exitstatus in onint

Partially backported this commit:

    Date: Thu, 2 Oct 2014 21:07:55 +0800
    [ERROR] Set exitstatus in onint

    Currently the exit status when we receive SIGINT is set in evalcommand
    which means that it doesn't always get set.  For example, if you press
    CTRL-C at the prompt of an interactive dash, the exit status is not
    set to 130 as it is in many other Bourne shells.

    This patch fixes this by moving the setting of the exit status into
    onint which also simplifies evalcommand.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The part after "if (evalbltin(cmdentry.u.cmd, argc, argv, flags))"
causes testsuite failures in signal handling, so left unchanged.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [EVAL] Revert SKIPEVAL into EXEXIT
Denys Vlasenko [Sat, 1 Oct 2016 13:27:44 +0000 (15:27 +0200)]
ash: [EVAL] Revert SKIPEVAL into EXEXIT

Upstream commit:

    Date:   Tue Aug 11 20:56:53 2009 +1000
    [EVAL] Revert SKIPEVAL into EXEXIT

    Now that eval handles EV_TESTED correctly, we can remove the
    SKIPEVAL hack and simply use EXEXIT for set -e.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [EVAL] Pass EV_TESTED into evalcmd
Denys Vlasenko [Sat, 1 Oct 2016 13:10:16 +0000 (15:10 +0200)]
ash: [EVAL] Pass EV_TESTED into evalcmd

Upstream commit:

    Date:   Tue Aug 11 20:48:15 2009 +1000
    [EVAL] Pass EV_TESTED into evalcmd

    This patch fixes the case where the eval command is used with
    set -e and as part of a construct that should not cause the
    shell to abort, e.g., as part of the condition of an if statement.

    This is achieved by propagating the EV_TESTED flag into the
    evalstring function through evalcmd.  As this alters the prototype
    of evalcmd it is now invoked explicitly by evalbltin.  The built-in
    infrastructure has been changed to accomodate this special case.

    In order to ensure that the EXIT trap is properly executed this
    patch clears evalskip in exitshell.  This wasn't needed before
    because of the broken way evalstring worked where it always clears
    evalskip when called by minusc.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Although, I failed to create a reproducer for this.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: fix a thinko in the last commit
Denys Vlasenko [Sat, 1 Oct 2016 12:47:52 +0000 (14:47 +0200)]
ash: fix a thinko in the last commit

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: make internal globbing code selectable from config
Denys Vlasenko [Sat, 1 Oct 2016 12:33:08 +0000 (14:33 +0200)]
ash: make internal globbing code selectable from config

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: explain how "command" is handled, and shrink it a bit
Denys Vlasenko [Sat, 1 Oct 2016 01:02:25 +0000 (03:02 +0200)]
ash: explain how "command" is handled, and shrink it a bit

function                                             old     new   delta
getoptscmd                                           641     632      -9
commandcmd                                            79      69     -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-19)             Total: -19 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [VAR] Initialise OPTIND after importing environment
Denys Vlasenko [Fri, 30 Sep 2016 12:36:59 +0000 (14:36 +0200)]
ash: [VAR] Initialise OPTIND after importing environment

Upstream commit 1:

    Date: Fri, 23 Aug 2013 21:27:42 +1000
    [VAR] Initialise OPTIND after importing environment

    On Sat, Mar 23, 2013 at 01:46:20AM +0000, Chris F.A. Johnson wrote:
    >   According to both the dash man page and the POSIX spec, "When the
    >   shell is invoked, OPTIND is initialized to 1."
    >
    >   However, it actually takes the value of the environment variable
    >   if it exists:
    >
    > $ OPTIND=4 dash -c 'echo "$OPTIND"'
    > 4
    > $ OPTIND=4 bash -c 'echo "$OPTIND"'
    > 1
    > $ OPTIND=4 ksh -c 'echo "$OPTIND"'
    > 1
    > $ OPTIND=4 ksh93 -c 'echo "$OPTIND"'
    > 1

    This patch fixes this by initialising OPTIND after importing the
    environment.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Upstream commit 2:

    Date: Tue, 7 Oct 2014 22:24:42 +0800
    [VAR] Use setvareq to set OPTIND initially

    There is no need to setvarint to set the initial value of OPTIND
    of one.  This patch switchs to setvareq which also lets us avoid
    an unnecessary memory allocation.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [BUILTIN] Merge SKIPFUNC/SKIPFILE and only clear SKIPFUNC when leaving dotcmd
Denys Vlasenko [Fri, 30 Sep 2016 12:18:34 +0000 (14:18 +0200)]
ash: [BUILTIN] Merge SKIPFUNC/SKIPFILE and only clear SKIPFUNC when leaving dotcmd

Upstream commit:

    Date: Sat, 9 Jul 2011 22:05:22 +0800
    [BUILTIN] Merge SKIPFUNC/SKIPFILE and only clear SKIPFUNC when leaving dotcmd

    Currently upon leaving a dotcmd the evalskip state is reset so
    if a continue/break statement is used within a dot script it would
    have no effect outside of the dot script.

    This is inconsistent with other shells.

    This patch is based on one by Jilles Tjoelker and only clears
    SKIPFUNC when leaving a dot script.  As a result continue/break
    will remain in effect.

    It also merges SKIPFUNC/SKIPFILE as they have no practical difference.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: enable "msh is deprecated" message in msh stub
Denys Vlasenko [Fri, 30 Sep 2016 10:28:37 +0000 (12:28 +0200)]
hush: enable "msh is deprecated" message in msh stub

After giving a few more years for everyone to notice and migrate,
can nuke all remains of msh.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: Avoid overflow for very long variable name
Denys Vlasenko [Fri, 30 Sep 2016 09:35:54 +0000 (11:35 +0200)]
ash: Avoid overflow for very long variable name

Upstream commit:

    Date: Tue, 3 Jul 2012 17:32:33 +0800
    Avoid overflow for very long variable name

    Otherwise, this:
      $ perl -le 'print "v"x(2**31+1) ."=1"' | dash
    provokes integer overflow

Signed-off-by: Jim Meyering <meyering@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [VAR] Sanitise environment variable names on entry
Denys Vlasenko [Fri, 30 Sep 2016 09:33:47 +0000 (11:33 +0200)]
ash: [VAR] Sanitise environment variable names on entry

Upstream commit:

    Date: Sat, 25 Feb 2012 15:35:18 +0800
    [VAR] Sanitise environment variable names on entry

    On Tue, Feb 14, 2012 at 10:48:48AM +0000, harald@redhat.com wrote:
    > "export -p" prints all environment variables, without checking if the
    > environment variable is a valid dash variable name.
    >
    > IMHO, the only valid usecase for "export -p" is to eval the output.
    >
    > $ eval $(export -p); echo OK
    > OK
    >
    > Without this patch the following test does error out with:
    >
    > test.py:
    > import os
    > os.environ["test-test"]="test"
    > os.environ["test_test"]="test"
    > os.execv("./dash", [ './dash', '-c', 'eval $(export -p); echo OK' ])
    >
    > $ python test.py
    > ./dash: 1: export: test-test: bad variable name
    >
    > Of course the results can be more evil, if the environment variable
    > name is crafted, that it injects valid shell code.

    This patch fixes the issue by sanitising all environment variable names
    upon entry into the shell.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [EVAL] Avoid using undefined handler
Denys Vlasenko [Fri, 30 Sep 2016 09:30:11 +0000 (11:30 +0200)]
ash: [EVAL] Avoid using undefined handler

Upstream commit:

    Date: Fri, 8 Jul 2011 16:41:24 +0800
    [EVAL] Avoid using undefined handler

    * src/eval.c (evalbltin, evalfun): Set savehandler before calling
    setjmp with the possible "goto *done", where savehandler is used.
    Otherwise, clang warns that "Assigned value is garbage or undefined"
    at the point where "savehandler" is used on the RHS.

Signed-off-by: Jim Meyering <meyering@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: remove dead stores and unused variables
Denys Vlasenko [Fri, 30 Sep 2016 09:24:12 +0000 (11:24 +0200)]
ash: remove dead stores and unused variables

Upstream commit 1:

    Date: Fri, 8 Jul 2011 16:12:20 +0800
    [MEMALLOC] Avoid gcc warning: variable 'oldstackp' set but not used

    * src/memalloc.c (growstackblock): Remove declaration and set of
    set-but-not-used variable.  Also remove a stray space-before-TAB.

Signed-off-by: Jim Meyering <meyering@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Upstream commit 2:

    Date: Fri, 8 Jul 2011 16:16:11 +0800
    [MEMALLOC] Avoid clang warning about dead store to "size"

    * src/memalloc.c (makestrspace): Remove dead store.

Signed-off-by: Jim Meyering <meyering@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoash: [MEMALLOC] Add pushstackmark
Denys Vlasenko [Fri, 30 Sep 2016 09:21:21 +0000 (11:21 +0200)]
ash: [MEMALLOC] Add pushstackmark

Upstream commit:

    Author: Herbert Xu <herbert@gondor.apana.org.au>
    Date:   Sat Oct 6 00:45:52 2007 +0800

    [MEMALLOC] Add pushstackmark

    This patch gets rid of the stack mark tracking hack by allocating a little
    bit of stack memory if we're at risk of planting a stack mark which may be
    grown later.  To do this a new function pushstackmark is added which lets
    the user pick a bigger amount to allocate since some users do that anyway
    after setting a stack mark.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: fix typo in comment
Denys Vlasenko [Fri, 30 Sep 2016 00:02:25 +0000 (02:02 +0200)]
hush: fix typo in comment

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: fix interactive input handling of backslash+newline
Denys Vlasenko [Thu, 29 Sep 2016 23:49:53 +0000 (01:49 +0200)]
hush: fix interactive input handling of backslash+newline

function                                             old     new   delta
fgetc_interactive                                      -     258    +258
i_peek_and_eat_bkslash_nl                             43      93     +50
static_peek2                                           7       -      -7
setup_string_in_str                                   46      39      -7
setup_file_in_str                                     47      40      -7
file_peek                                             72      52     -20
expand_vars_to_list                                 1167    1143     -24
file_peek2                                            74       -     -74
file_get                                             326      65    -261
------------------------------------------------------------------------------
(add/remove: 1/2 grow/shrink: 1/5 up/down: 308/-400)          Total: -92 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: G.user_input_buf[] is needed only if line editing is enabled
Denys Vlasenko [Thu, 29 Sep 2016 18:25:44 +0000 (20:25 +0200)]
hush: G.user_input_buf[] is needed only if line editing is enabled

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agoshell testsuite: add trailing newline to var_unbackslash1.tests
Denys Vlasenko [Thu, 29 Sep 2016 18:02:53 +0000 (20:02 +0200)]
shell testsuite: add trailing newline to var_unbackslash1.tests

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
8 years agohush: speed optimizations
Denys Vlasenko [Thu, 29 Sep 2016 17:50:55 +0000 (19:50 +0200)]
hush: speed optimizations

Make o_addchr() faster: do not call o_grow_by() each time.
Create i_getch_and_eat_bkslash_nl(), use it instead of peek+getch pair.

function                                             old     new   delta
o_addchr                                              42      54     +12
parse_dollar                                         761     771     +10
o_grow_by                                             48      37     -11
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/1 up/down: 24/-11)             Total: 11 bytes

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