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2017-08-02do not use `a' quoting style in commentsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31ash: align --login code with dashDenys Vlasenko
Upstream commit: Date: Sun, 13 Jul 2008 22:34:50 +0800 [OPTIONS] Added support for -l This patch adds support for the -l option (login shell) as required by the LSB. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> It's a bit bigger, but gets rid of one global variable function old new delta options 554 576 +22 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31hush: remove redundant "G_flag_return_in_progress = -1"Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31hush: fix "true | func_with_return" not allowing return.Denys Vlasenko
function old new delta pseudo_exec_argv 305 312 +7 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31ash: fix display of ">&-" redirect in job stringsDenys Vlasenko
function old new delta cmdtxt 558 569 +11 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31hush: functions have priority over builtins (!)Denys Vlasenko
function old new delta pseudo_exec_argv 291 305 +14 run_pipe 1560 1555 -5 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 14/-5) Total: 9 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31hush: if STANDALONE, close interactive fd for NOEXECed childrenDenys Vlasenko
function old new delta pseudo_exec_argv 291 305 +14 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31ash,hush: ">&10" redirects to script/tty fds should not workDenys Vlasenko
The fact that shell has open fds to tty and/or scripts should be unobservable, if possible. In particular, if redirect tries to dup one of them via ">&script_fd", it's better to pretend that script_fd is closed, and thus redirect fails with EBADF. Fixes these two testcase failures: ash-redir/redir_to_bad_fd.tests hush-redir/redir_to_bad_fd3.tests function old new delta redirect 1018 1129 +111 setup_redirects 250 359 +109 readtoken1 2651 2655 +4 cmdloop 185 187 +2 changepath 194 195 +1 save_fd_on_redirect 203 194 -9 evaltree 501 484 -17 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 5/2 up/down: 227/-26) Total: 201 bytes text data bss dec hex filename 914553 485 6848 921886 e111e busybox_old 914754 485 6848 922087 e11e7 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31ash: significant overhaul of redirect saving logicDenys Vlasenko
New code is similar to what hush is doing. Make CLOSED to -1: same as dash. popredir() loses "restore" parameter: same as dash. COPYFD_RESTORE bit is no longer necessary. This change fixes this interactive bug: $ ls -l /proc/$$/fd 10>&- ash: can't set tty process group: Bad file descriptor ash: can't set tty process group: Bad file descriptor [1]+ Done(2) ls -l /proc/${\$}/fd 10>&4294967295 function old new delta unwindredir 29 27 -2 tryexec 154 152 -2 evaltree 503 501 -2 evalcommand 1369 1367 -2 cmdloop 187 185 -2 redirect 1029 1018 -11 popredir 153 123 -30 need_to_remember 36 - -36 is_hidden_fd 68 - -68 ------------------------------------------------------------------------------ (add/remove: 0/2 grow/shrink: 0/7 up/down: 0/-155) Total: -155 bytes text data bss dec hex filename 914572 485 6848 921905 e1131 busybox_old 914553 485 6848 921886 e111e busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31hush: massage redirect code to be slightly more like ashDenys Vlasenko
function old new delta save_fd_on_redirect - 203 +203 xdup_CLOEXEC_and_close - 75 +75 setup_redirects 245 250 +5 xdup_and_close 72 - -72 save_fds_on_redirect 221 - -221 ------------------------------------------------------------------------------ (add/remove: 2/2 grow/shrink: 1/0 up/down: 283/-293) Total: -10 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31ash: remove REDIR_SAVEFD2Denys Vlasenko
function old new delta evalcommand 1364 1369 +5 redirect 1055 1014 -41 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 5/-41) Total: -36 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29ash: if !ENABLE_ASH_EXPAND_PRMT, disable PSSYNTAX codeDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29ash: [REDIR] Fix popredir on abnormal exit from built-inDenys Vlasenko
Upstream commit: Date: Thu, 27 May 2010 15:03:46 +0800 [REDIR] Fix popredir on abnormal exit from built-in Just like the poplocalvar problem recently fixed, redirections can also be leaked in case of an abnormal exit. This patch fixes it using the same method as poplocalvar, by storing the previous redirection state and restoring to that point. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29ash: [PARSER] Add FAKEEOFMARK for expandstrDenys Vlasenko
Upstream commit: Date: Thu, 27 Dec 2007 13:54:16 +1100 [PARSER] Add FAKEEOFMARK for expandstr Previously expandstr used the string "" to indicate that it needs to be treated just like a here-doc except that there is no terminator. However, the string "" is in fact a valid here-doc terminator so now that we deal with it correctly expandstr no longer works in the presence of new-lines in the prompt. This patch introduces the FAKEEOFMARK macro which does not equal any real EOF marker but is distinct from the NULL pointer which is used to indicate non-here-doc contexts. Thanks to Markus Triska for reporting this regression. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Unfortunately, I did not find the failing example for this old fix. I also tweaked the code which was added by this commit: " Date: Mon Sep 24 18:30:02 2007 +0000 ash: fix prompt expansion (Natanael Copa <natanael.copa@gmail.com>) " since other parts of code do expect expandstr() to use DQSYNTAX, not PSSYNTAX. function old new delta parse_stream 2609 2634 +25 setprompt_if 128 133 +5 read_profile 32 37 +5 evalcommand 1334 1339 +5 expandstr 122 120 -2 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 4/1 up/down: 40/-2) Total: 38 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29hush: fix handling of empty heredoc EOF markerDenys Vlasenko
function old new delta parse_stream 2609 2634 +25 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29ash: [PARSER] Removed noexpand/length check on eofmarkDenys Vlasenko
Upstream comment: Date: Sun, 11 Nov 2007 14:21:23 +0800 [PARSER] Removed noexpand/length check on eofmark On Tue, Oct 30, 2007 at 04:23:35AM +0000, Oleg Verych wrote: > > } 8<<"" > ====================== Actually this (the empty delim) only works with dash by accident. I've tried bash and pdksh and they both terminate on the first empty line which is what you would expect rather than EOF. The real Korn shell does something completely different. I've fixed this in dash to conform to bash/pdksh. > In [0] it's stated, that delimiter isn't evaluated (expanded), only > quoiting must be checked. That if() seems to be completely bogus. OK I agree. The reason it was there is because the parser would have already replaced the dollar sign by an internal representation. I've fixed it properly with this patch. Test case: cat <<- $a OK $a cat <<- "" OK echo OK Old result: dash: Syntax error: Illegal eof marker for << redirection OK echo OK New result: OK OK OK function old new delta parsefname 227 152 -75 readtoken1 2819 2651 -168 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-243) Total: -243 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29ash: "Undo all redirections" comment is wrong, delete itDenys Vlasenko
No code changes. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29ash: make tryexec(cmd) parameter const charDenys Vlasenko
Fewer casts this way. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-28ash: support platforms that don't have '%m' printf specifierRon Yorston
The '%m' conversion specifier prints an error message based on the current value of 'errno'. It is available in the GNU C library, Cygwin (since 2012), uClibc and musl. It is not available in various BSDs, BSD-derived systems (MacOS, Android) or Microsoft Windows. Use a symbol defined in platform.h to control how error messages can be formatted to display the 'errno' message. On platforms that support it use '%m'; on other platforms use '%s' and strerror(). On platforms that have '%m' there is essentially no change in the size of the binary. Otherwise: function old new delta redirect 1287 1310 +23 xtcsetpgrp 27 44 +17 dup2_or_raise 34 51 +17 setinputfile 267 275 +8 .rodata 163379 163371 -8 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 4/1 up/down: 65/-8) Total: 57 bytes Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-28ash: less hackish implementation of evaltreenr()Denys Vlasenko
Defining a function alias with __attribute__ ((alias("evaltree"),__noreturn__)) is not that usual, and clang had a bug which made it misunderstand this construct. Switch to: ALWAYS_INLINE NORETURN evaltreenr() { evaltree(); unreachable(); } Older gcc's do not know unreachable(), on them we pay the price of having a few extra calls to abort(): function old new delta evalsubshell 151 156 +5 evalpipe 357 362 +5 argstr 1141 1144 +3 On newer gcc, code size does not change. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: force inlining of a trivial functionDenys Vlasenko
function old new delta bltinlookup 5 - -5 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: revert previous implementation of "A=1 A=2 B=$A cmd" codeDenys Vlasenko
Reverts this: commit 0e6f661e23d358cca104c24f8438d0ec64df32f1 Date: Fri Feb 15 15:02:15 2008 +0000 ash: handle "A=1 A=2 B=$A; echo $B". closes bug 947. A different fix from upstream has been imported by previous six commits. Last seven commits, cumulative: function old new delta poplocalvars - 314 +314 mklocal - 288 +288 pushlocalvars - 48 +48 evalcommand 1372 1408 +36 unwindlocalvars - 22 +22 ash_main 1022 1029 +7 setvar 167 172 +5 localvar_stack - 4 +4 setvareq 303 302 -1 evalcase 271 269 -2 subevalvar 1202 1198 -4 localvars 4 - -4 cmdenviron 4 - -4 expandarg 984 973 -11 evalvar 589 574 -15 argstr 1164 1141 -23 dotcmd 335 303 -32 bltinlookup 51 5 -46 varvalue 709 596 -113 evalfun 456 270 -186 localcmd 364 44 -320 ------------------------------------------------------------------------------ (add/remove: 5/2 grow/shrink: 3/11 up/down: 724/-761) Total: -37 bytes text data bss dec hex filename 915353 485 6888 922726 e1466 busybox_old 915320 485 6880 922685 e143d busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: [VAR] Fix loss of variables when hash collidesDenys Vlasenko
Upstream commit: Date: Tue, 6 Jul 2010 17:40:53 +0800 [VAR] Fix loss of variables when hash collides Brian Koropoff reported that the new var patches broke the following script: #!/bin/dash GDM_LANG="bar" OPTION="foo" unset GDM_LANG # OPTION has mysteriously become unset echo "$OPTION" He correctly diagnosed this as a result of removing all variables in the hash chain preceding the one that should be removed in setvareq. He also provided a patch to fix this. This patch is based on his but without keeping the original vpp. As a result, we now store new variables at the end of the hash chain instead of the beginning. To make this work, setvareq/setvar now returns the vp pointer modified. In case they're used to unset a variable the pointer returned is undefined. This is because mklocal needs it and used to get it by assuming that the new variable always appear at the beginning of the chain. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: [VAR] Do not poplocalvars prematurely on regular utilitiesDenys Vlasenko
Upstream commit: Date: Thu, 27 May 2010 11:50:19 +0800 [VAR] Do not poplocalvars prematurely on regular utilities The recent cmdenviron removal broke regular utilities by calling poplocalvars too early. This patch fixes that by postponing the poplocalvars for regular utilities until they have completed. In order to ensure that local still works, it is now a special built-in. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: [VAR] Fix poplocalvar on abnormal exit from functionDenys Vlasenko
Upstream commit: Date: Thu, 27 May 2010 11:32:55 +0800 [VAR] Fix poplocalvar on abnormal exit from function The new localvar code broke the abnormal exit from functions and built-ins by not restoring the original localvar state. This patch fixes this by storing the previous localvar state so that we always unwind correctly in case of an abnormal exit. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: [VAR] Replace cmdenviron with localvarsDenys Vlasenko
Upstream commit: Date: Wed, 26 May 2010 18:54:19 +0800 [VAR] Replace cmdenviron with localvars This patch replaces the cmdenviron mechanism for temporary command variables with the localvars mechanism used by functions. This reduces code size, and more importantly, makes the variable assignment take effect immediately as required by POSIX. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: [VAR] Fix poplocalvar leakDenys Vlasenko
Upstream commit: Date: Tue, 25 May 2010 18:14:32 +0800 [VAR] Fix poplocalvar leak When a variable is marked as local, we set VSTRFIXED on its vp recored. However, poplocalvar never clears this flag for variables that were unset to begin with. Thus if you ever made an unset variable local, it would get the VSTRFIXED bit and stick around forever. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: [VAR] Add localvars nestingDenys Vlasenko
Upstream commit: Date: Mon, 24 May 2010 15:31:27 +0800 [VAR] Add localvars nesting This patch adds localvars nesting infrastructure so we can reuse the localvars mechanism for command evaluation. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: alloc slightly smaller buffer in cvtnum(); faster unsetvar()Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26ash: fix redir_leak.tests if STANDALONE=yDenys Vlasenko
If STANDALONE and we run a NOEXEC applet, saved copies of redirected fds were visible for the child. They have CLOEXEC bit, yes, but we do not exec in this case. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26shell: remove ${#+} tests, it is not a valid constructDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-26hush: fix ${##}, ${#?}, ${#!} handlingDenys Vlasenko
function old new delta parse_dollar 786 820 +34 expand_one_var 1579 1592 +13 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 47/0) Total: 47 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: [SHELL] Optimize dash -c "command" to avoid a forkDenys Vlasenko
Upstream commit: Date: Thu, 7 Jul 2011 13:58:48 +0800 [SHELL] Optimize dash -c "command" to avoid a fork On Sun, Apr 10, 2011 at 07:36:49AM +0000, Jonathan Nieder wrote: > From: Jilles Tjoelker <jilles@stack.nl> > Date: Sat, 13 Jun 2009 16:17:45 -0500 > > This change only affects strings passed to -c, when the -s option is > not used. > > Use the EV_EXIT flag to inform the eval machinery that the string > being passed is the entirety of input. This way, a fork may be > omitted in many special cases. > > If there are empty lines after the last command, the evalcmd will not > see the end early enough and forks will not be omitted. The same thing > seems to happen in bash. > > Example: > sh -c 'ps lT' > No longer shows a shell process waiting for ps to finish. > > [jn: ported from FreeBSD SVN r194128. Bugs are mine.] > > Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Instead of detecting EOF using the input layer, I'm going to use the parser instead. In either case, we always have to read ahead in order to complete the parsing of the previous node. Therefore we always know whether there is more to come, except in the case where we see a newline/semicolon or similar. For the purposes of sh -c, this should be sufficient. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> function old new delta evalstring 190 224 +34 ash_main 1014 1022 +8 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 42/0) Total: 42 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: allow "trap NUM [SIG]..." syntaxDenys Vlasenko
While at it, make get_signum() return -1 for numeric strings >= NSIG. function old new delta trapcmd 292 306 +14 get_signum 295 300 +5 builtin_trap 413 412 -1 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/1 up/down: 19/-1) Total: 18 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: [REDIR] Replace GPL noclobberopen code with the FreeBSD versionDenys Vlasenko
Upstream commit: Date: Thu, 10 Mar 2011 16:52:13 +0800 [REDIR] Replace GPL noclobberopen code with the FreeBSD version Replace noclobberopen() from bash with the FreeBSD code for noclobber opens. This also reduces code size by eliminating an unnecessary check. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> function old new delta changepath 192 194 +2 localcmd 366 364 -2 expmeta 521 517 -4 redirect 1210 1135 -75 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/3 up/down: 2/-81) Total: -79 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: sync up with dash with respect to redirection escapingDenys Vlasenko
We fixed the problem differently than they. Let's not deviate. Upstream commit: Date: Thu, 27 May 2010 20:07:29 +1000 [EXPAND] Fix corruption of redirections with byte 0x81 In other ash variants, a partial implementation of ksh-like cmd >file* adds and removes CTLESC bytes ('\x81') in redirection filenames, preserving 8-bit transparency. Long ago, dash removed the code to add the CTLESC bytes, but not the code to remove them, causing corruption of filenames containing CTLESC. This commit removes the code to remove the CTLESC bytes. The CTLESC byte occurs frequently in UTF-8 encoded non-Latin text. This bug has been reported various times to Ubuntu and Debian (e.g. Launchpad Ubuntu #422298). This patch is the same as the one submitted by Alexander Korolkov in Ubuntu #422298. Signed-off-by: Jilles Tjoelker <jilles@stack.nl> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> function old new delta changepath 194 192 -2 expandarg 1000 984 -16 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-18) Total: -18 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: [VAR] Move unsetvar functionality into setvareqDenys Vlasenko
Upstream commit: Date: Tue, 25 May 2010 20:55:05 +0800 [VAR] Move unsetvar functionality into setvareq This patch moves the unsetvar code into setvareq so that we can no have a pathological case of an unset variable hanging around unless it has a bit pinning it like VEXPORT. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> function old new delta setvareq 227 303 +76 expmeta 517 521 +4 localcmd 364 366 +2 unsetcmd 96 76 -20 unsetvar 129 7 -122 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/2 up/down: 82/-142) Total: -60 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: import param_expand_default.tests from hushDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25hush: treat ${#?} as "length of $?"Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25ash: add a few tests from hush-vars/*Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24ash: fix comment, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24ash: copy three tests from hush_test/hush-signals/*Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24shell: some additions to *sh-misc/* testsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24ash: add most of hush process subst testsDenys Vlasenko
ash passes these. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24hush: fix a case when redirect to a closed fd #1 is not restoring (closing) itDenys Vlasenko
function old new delta setup_redirects 200 245 +45 append_squirrel - 41 +41 save_fds_on_redirect 256 221 -35 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/1 up/down: 86/-35) Total: 51 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24ash: add all hush parsing tests to ast testsDenys Vlasenko
All pass. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-24hush: use mempcpy where usefulDenys Vlasenko
function old new delta o_addblock 58 42 -16 expand_one_var 1618 1555 -63 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-79) Total: -79 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-23ash: fix for last commitDenys Vlasenko
"mempcpy(q, s, len) + len" is obviously no good :( Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-23ash: use mempcpy() in more placesDenys Vlasenko
Most changes are taken from dash. function old new delta single_quote 127 129 +2 stack_nputstr 28 29 +1 path_advance 209 202 -7 rmescapes 346 308 -38 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/2 up/down: 3/-45) Total: -42 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-21ash: use mempcpy() where appropriateDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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