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2018-04-05hush: fix corner cases with exec in empty expansionsDenys Vlasenko
Cases like these: var=val exec >redir var=val `` >redir function old new delta run_pipe 1701 1723 +22 redirect_and_varexp_helper 56 55 -1 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 22/-1) Total: 21 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-05hush: fix a bug where we don't properly handle f() { a=A; b=B; }; a= fDenys Vlasenko
function old new delta unset_local_var 20 274 +254 leave_var_nest_level - 98 +98 set_vars_and_save_old 128 164 +36 enter_var_nest_level - 32 +32 builtin_local 46 50 +4 pseudo_exec_argv 554 544 -10 redirect_and_varexp_helper 77 64 -13 run_pipe 1890 1641 -249 unset_local_var_len 267 - -267 ------------------------------------------------------------------------------ (add/remove: 2/1 grow/shrink: 3/3 up/down: 424/-539) Total: -115 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-04hush: fix for readonly vars in "ro=A ro=B cmd" caseDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-03hush: support "f() (cmd)" functionsDenys Vlasenko
Many other shells support this construct function old new delta parse_stream 2950 3018 +68 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-03hush: fix "set -e; false || x=1; echo OK"Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-02hush: fix a backslash-removal bug in caseDenys Vlasenko
function old new delta run_list 1270 1053 -217 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-02ash: expand: Fix bugs with words connected to the right of $@Denys Vlasenko
Upstream email: This is actually composed of two bugs. First of all our tracking of quotemark is wrong so anything after "$@" becomes quoted. Once we fix that then the problem is that the first space character after "$@" is not recognised as an IFS. This patch fixes both. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-02ash: parser: Add syntax stack for recursive parsingDenys Vlasenko
This closes 10821. Upstream patch: From: Herbert Xu <herbert@gondor.apana.org.au> Date: Fri, 9 Mar 2018 00:14:02 +0800 parser: Add syntax stack for recursive parsing Without a stack of syntaxes we cannot correctly these two cases together: "${a#'$$'}" "${a#"${b-'$$'}"}" A recursive parser also helps in some other corner cases such as nested arithmetic expansion with paratheses. This patch adds a syntax stack allocated from the stack using alloca. As a side-effect this allows us to remove the naked backslashes for patterns within double-quotes, which means that EXP_QPAT also has to go. This patch also fixes removes any backslashes that precede right braces when they are present within a parameter expansion context, and backslashes that precede double quotes within inner double quotes inside a parameter expansion in a here-document context. The idea of a recursive parser is based on a patch by Harald van Dijk. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> var_bash3, var_bash4 and var_bash6 tests are updated with the output given by bash-4.3.43 With this patch, the following tests now pass for ash: dollar_repl_slash_bash2.tests squote_in_varexp2.tests squote_in_varexp.tests var_bash4.tests function old new delta readtoken1 2615 2874 +259 synstack_push - 54 +54 evalvar 574 571 -3 rmescapes 330 310 -20 subevalvar 1279 1258 -21 argstr 1146 1107 -39 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/4 up/down: 313/-83) Total: 230 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-01hush: add a comment where we differ from bash wrt heredoc EOF mark handlingDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-01parser: Fix backquote support in here-document EOF markDenys Vlasenko
Upstream commit: Author: Herbert Xu <herbert@gondor.apana.org.au> Date: Thu Mar 15 18:27:30 2018 +0800 parser: Fix backquote support in here-document EOF mark Currently using backquotes in a here-document EOF mark is broken because dash tries to do command substitution on it. This patch fixes it by checking whether we're looking for an EOF mark during tokenisation. Reported-by: Harald van Dijk <harald@gigawatt.nl> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> With added fix for quoted-ness of the EOF mark. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-01ash,hush: handle a few more bkslash-newline casesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-03-31shells: fix var_LINENO1.tests false positive, add it to ash tests tooDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-03-31ash: use pgetc_eatbnl() in more placesDenys Vlasenko
Part of upstream commit: Date: Thu Mar 8 08:37:11 2018 +0100 Author: Harald van Dijk <harald@gigawatt.nl> parser: use pgetc_eatbnl() in more places dash has a pgetc_eatbnl function in parser.c which skips any backslash-newline combinations. It's not used everywhere it could be. There is also some duplicated backslash-newline handling elsewhere in parser.c. Replace most of the calls to pgetc() with calls to pgetc_eatbnl() and remove the duplicated backslash-newline handling. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Not adding "readtoken1(pgetc_eatbnl(), DQSYNTAX..." changes, since readtoken1() handles the "starts with backslash + newline" case itself. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-03-30ash,hush: new test dollar_repl_slash_bash2.testsDenys Vlasenko
This fails for ash. hush works. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-03-28ash,hush: fix "saved" redirected fds still visible in childrenDenys Vlasenko
Based on a patch by Mark Marshall <mark.marshall@omicronenergy.com> function old new delta dup_CLOEXEC - 49 +49 fcntl_F_DUPFD 46 - -46 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-03-02hush: fix a='a\\'; echo "${a%\\\\}"Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-03-02shell: tweak bkslash_in_varexp.tests, add bkslash_in_varexp1.testsDenys Vlasenko
It turns out bkslash_in_varexp.tests was a bash bug :] ash and hush fail "corrected" bkslash_in_varexp.tests as well, just not as badly as I thought (hush gets half of the cases right). Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-03-02shell: two new tests, both fail for ash and hushDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-13ash : fix double-quoted "\z" handlingDenys Vlasenko
function old new delta readtoken1 2602 2608 +6 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-28shell: handle $((NUM++...) like bash does. Closes 10706Denys Vlasenko
function old new delta evaluate_string 680 729 +49 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-25hush: fix two corner cases in ${v/pattern/repl}. Closes 10686Denys Vlasenko
function old new delta expand_one_var 1592 1618 +26 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-19hush: implement $LINENO bashismDenys Vlasenko
function old new delta run_pipe 1697 1774 +77 unset_local_var_len 258 301 +43 hush_main 1009 1051 +42 set_local_var 516 554 +38 parse_and_run_file 42 75 +33 i_getch 96 116 +20 .rodata 18858 18876 +18 done_command 106 122 +16 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 8/0 up/down: 287/0) Total: 287 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-13shell: echo ${?:0} was fixed sometime ago, enable it in testsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-13hush: fix raw ^C handlisg in single-quoted stringsDenys Vlasenko
function old new delta parse_stream 2719 2754 +35 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-12hush: add command2.tests from ash testsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-11hush: fix handling of ^C in evalDenys Vlasenko
function old new delta run_list 1044 1259 +215 builtin_eval 45 126 +81 expand_strvec_to_string 91 - -91 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 2/0 up/down: 296/-91) Total: 205 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-11hush: fix handling of raw ^C in scripts: "echo ^C"Denys Vlasenko
function old new delta expand_vars_to_list 1133 1187 +54 parse_stream 2690 2719 +29 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-11-03ash: fix nofork bug where environment is not properly passed to a commandDenys Vlasenko
function old new delta listvars 144 252 +108 evalcommand 1500 1546 +46 showvars 142 147 +5 shellexec 242 245 +3 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 4/0 up/down: 162/0) Total: 162 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-10-22hush: fix comment parsing in `cmd`, closes 10421Denys Vlasenko
function old new delta parse_stream 2692 2690 -2 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-29hush: fix false positive in unset.testsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-29hush: fix "getopts" builtin to not be upset by other builtins calling getopt()Denys Vlasenko
function old new delta builtin_getopts 363 403 +40 unset_local_var_len 185 215 +30 set_local_var 440 466 +26 reset_traps_to_defaults 151 157 +6 pseudo_exec_argv 320 326 +6 install_special_sighandlers 52 58 +6 pick_sighandler 62 65 +3 execvp_or_die 85 88 +3 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 8/0 up/down: 120/0) Total: 120 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-13shell: tweak getopts tests, no code changesDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-11hush: implement "silent" optstrings of ":opts"Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-11hush: add a test which fails due to uclibc bug in getopt()Denys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-11shell: add OPTARG poisoning to getopt_optarg.testsDenys Vlasenko
ash fails this! Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-11hush: teach getopts to set/unset OPTARGDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-11hush: getopts builtinDenys Vlasenko
function old new delta builtin_getopts - 271 +271 bltins1 372 384 +12 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/0 up/down: 283/0) Total: 283 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-03nofork: fix a bug uncovered by hush testsuite (forgotten fflush)Denys Vlasenko
function old new delta run_nofork_applet 280 287 +7 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-02hush: do not accept "if() { echo; }" function defDenys Vlasenko
function old new delta parse_stream 2634 2692 +58 msg_and_die_if_script - 21 +21 syntax_error_unexpected_ch 41 46 +5 syntax_error_at 14 18 +4 die_if_script 31 28 -3 setup_redirects 319 308 -11 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 3/2 up/down: 88/-14) Total: 74 bytes 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>
2017-07-31hush: 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>
2017-07-31ash: 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>
2017-07-29hush: 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>
2017-07-26shell: 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: [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>
2017-07-24shell: some additions to *sh-misc/* testsDenys Vlasenko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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