diff options
| -rw-r--r-- | shell/ash_test/ash-quoting/dollar_altvalue9.right | 24 | ||||
| -rwxr-xr-x | shell/ash_test/ash-quoting/dollar_altvalue9.tests | 17 | ||||
| -rw-r--r-- | shell/hush.c | 263 | ||||
| -rw-r--r-- | shell/hush_test/hush-quoting/dollar_altvalue9.right | 24 | ||||
| -rwxr-xr-x | shell/hush_test/hush-quoting/dollar_altvalue9.tests | 17 |
5 files changed, 284 insertions, 61 deletions
diff --git a/shell/ash_test/ash-quoting/dollar_altvalue9.right b/shell/ash_test/ash-quoting/dollar_altvalue9.right new file mode 100644 index 000000000..fc6c2697c --- /dev/null +++ b/shell/ash_test/ash-quoting/dollar_altvalue9.right @@ -0,0 +1,24 @@ +Unquoted 1: +|a| +|x y| +|1| +|2| +|1 2| +|A| +|B| +|C D| +|zb| +Quoted 1: +|a 'x y' 1 2 '' 1 2 A B C D zb| +Unquoted 2: +|ax y| +|1| +|2| +|1 2| +|A| +|B| +|C D| +|z| +|b| +Quoted 2: +|a 'x y' 1 2 '' 1 2 A B C D z b| diff --git a/shell/ash_test/ash-quoting/dollar_altvalue9.tests b/shell/ash_test/ash-quoting/dollar_altvalue9.tests new file mode 100755 index 000000000..27a6f4f3c --- /dev/null +++ b/shell/ash_test/ash-quoting/dollar_altvalue9.tests @@ -0,0 +1,17 @@ +f() { for i; do echo "|$i|"; done; } + +echo Unquoted 1: +x='1 2'; f a${x:+ 'x y' $x '' "$x" `echo A B` "`echo C D`" z}b +echo Quoted 1: +x='1 2'; f "a${x:+ 'x y' $x '' "$x" `echo A B` "`echo C D`" z}b" + +echo Unquoted 2: +x='1 2'; f a${x:+'x y' $x '' "$x" `echo A B` "`echo C D`" z }b +echo Quoted 2: +x='1 2'; f "a${x:+ 'x y' $x '' "$x" `echo A B` "`echo C D`" z }b" + +#echo Unquoted 3: +#e= +#x='1 2'; f a${x:+'x y' $x '' "$x" $e $e "$e" $e `echo A B` "`echo C D`" z }b +#echo Quoted 3: +#x='1 2'; f "a${x:+ 'x y' $x '' "$x" $e $e "$e" $e `echo A B` "`echo C D`" z }b" diff --git a/shell/hush.c b/shell/hush.c index b8af1b088..fc77b89fc 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -5873,6 +5873,138 @@ static char *encode_then_expand_vararg(const char *str, int handle_squotes, int return exp_str; } +static int expand_vars_to_list(o_string *output, int n, char *arg); + +static int encode_then_append_var_plusminus(o_string *output, int n, + const char *str, int dquoted) +{ + struct in_str input; + o_string dest = NULL_O_STRING; + +#if 0 //todo? + const char *cp; + cp = str; + for (;;) { + if (!*cp) return NULL; /* string has no special chars */ + if (*cp == '$') break; + if (*cp == '\\') break; + if (*cp == '\'') break; + if (*cp == '"') break; +#if ENABLE_HUSH_TICK + if (*cp == '`') break; +#endif + cp++; + } +#endif + + /* Expanding ARG in ${var+ARG}, ${var-ARG} */ + + setup_string_in_str(&input, str); + + for (;;) { + int ch; + + ch = i_getch(&input); + debug_printf_parse("%s: ch=%c (%d) escape=%x\n", + __func__, ch, ch, dest.o_expflags); + + if (!dest.o_expflags) { + if (ch == EOF) + break; + if (!dquoted && strchr(G.ifs, ch)) { + /* PREFIX${x:d${e}f ...} and we met space: expand "d${e}f" and start new word. + * do not assume we are at the start of the word (PREFIX above). + */ + if (dest.data) { + n = expand_vars_to_list(output, n, dest.data); + o_free(&dest); + o_addchr(output, '\0'); + n = o_save_ptr(output, n); /* create next word */ + } else + if (output->length != o_get_last_ptr(output, n) + || output->has_quoted_part + ) { + /* For these cases: + * f() { for i; do echo "|$i|"; done; }; x=x + * f a${x:+ }b # 1st condition + * |a| + * |b| + * f ""${x:+ }b # 2nd condition + * || + * |b| + */ + o_addchr(output, '\0'); + n = o_save_ptr(output, n); /* create next word */ + } + continue; + } + if (!dquoted && ch == '\'') { +//quoting version of add_till_single_quote() (try to merge?): + for (;;) { + ch = i_getch(&input); + if (ch == EOF) { + syntax_error_unterm_ch('\''); + goto ret; /* error */ + } + if (ch == '\'') + break; + o_addqchr(&dest, ch); + } + continue; + } + } + if (ch == EOF) { + syntax_error_unterm_ch('"'); + goto ret; /* error */ + } + if (ch == '"') { + dest.o_expflags ^= EXP_FLAG_ESC_GLOB_CHARS; + continue; + } + if (ch == '\\') { + ch = i_getch(&input); + if (ch == EOF) { +//example? error message? syntax_error_unterm_ch('"'); + debug_printf_parse("%s: error: \\<eof>\n", __func__); + goto ret; + } + o_addqchr(&dest, ch); + continue; + } + if (ch == '$') { + if (!parse_dollar(NULL, &dest, &input, /*quote_mask:*/ (dest.o_expflags || dquoted) ? 0x80 : 0)) { + debug_printf_parse("%s: error: parse_dollar returned 0 (error)\n", __func__); + goto ret; + } + continue; + } +#if ENABLE_HUSH_TICK + if (ch == '`') { + //unsigned pos = dest->length; + o_addchr(&dest, SPECIAL_VAR_SYMBOL); + o_addchr(&dest, (dest.o_expflags || dquoted) ? 0x80 | '`' : '`'); + if (!add_till_backquote(&dest, &input, + /*in_dquote:*/ dest.o_expflags /* nonzero if EXP_FLAG_ESC_GLOB_CHARS set */ + ) + ) { + goto ret; /* error */ + } + o_addchr(&dest, SPECIAL_VAR_SYMBOL); + //debug_printf_subst("SUBST RES3 '%s'\n", dest->data + pos); + continue; + } +#endif + o_addQchr(&dest, ch); + } /* for (;;) */ + + if (dest.data) { + n = expand_vars_to_list(output, n, dest.data); + } + ret: + o_free_unsafe(&dest); + return n; +} + #if ENABLE_FEATURE_SH_MATH static arith_t expand_and_evaluate_arith(const char *arg, const char **errmsg_p) { @@ -6231,78 +6363,86 @@ static NOINLINE int expand_one_var(o_string *output, * * Colon forms (${var:-word}, ${var:=word} etc) do the same, * but also treat null var as if it is unset. + * + * Word-splitting and single quote behavior: + * + * $ f() { for i; do echo "|$i|"; done; }; + * + * $ x=; f ${x:?'x y' z} + * bash: x: x y z #BUG: does not abort, ${} results in empty expansion + * $ x=; f "${x:?'x y' z}" + * bash: x: x y z # dash prints: dash: x: 'x y' z #BUG: does not abort, ${} results in "" + * + * $ x=; f ${x:='x y' z} + * |x| + * |y| + * |z| + * $ x=; f "${x:='x y' z}" + * |'x y' z| + * + * $ x=x; f ${x:+'x y' z}| + * |x y| + * |z| + * $ x=x; f "${x:+'x y' z}" + * |'x y' z| + * + * $ x=; f ${x:-'x y' z} + * |x y| + * |z| + * $ x=; f "${x:-'x y' z}" + * |'x y' z| */ -/* - * Word-splitting and squote behavior of bash: - * $ f() { for i; do echo "|$i|"; done; }; - * - * $ x=; f ${x:?'x y' z} - * bash: x: x y z #BUG: does not abort, ${} results in empty expansion - * $ x=; f "${x:?'x y' z}" - * bash: x: x y z # dash prints: dash: x: 'x y' z #BUG: does not abort, ${} results in "" - * - * $ x=; f ${x:='x y' z} - * |x| - * |y| - * |z| - * $ x=; f "${x:='x y' z}" - * |'x y' z| - * - * $ x=x; f ${x:+'x y' z} - * |x y| - * |z| - * $ x=x; f "${x:+'x y' z}" - * |'x y' z| - * - * $ x=; f ${x:-'x y' z} - * |x y| - * |z| - * $ x=; f "${x:-'x y' z}" - * |'x y' z| - */ int use_word = (!val || ((exp_save == ':') && !val[0])); if (exp_op == '+') use_word = !use_word; debug_printf_expand("expand: op:%c (null:%s) test:%i\n", exp_op, (exp_save == ':') ? "true" : "false", use_word); if (use_word) { -//FIXME: unquoted ${x:+"b c" d} and ${x:+'b c' d} should expand to two words -//currently it expands to three. - to_be_freed = encode_then_expand_vararg(exp_word, - /*handle_squotes:*/ !(arg0 & 0x80), - /*unbackslash:*/ 0 - ); - if (to_be_freed) - exp_word = to_be_freed; - if (exp_op == '?') { - /* mimic bash message */ - msg_and_die_if_script("%s: %s", - var, - exp_word[0] - ? exp_word - : "parameter null or not set" - /* ash has more specific messages, a-la: */ - /*: (exp_save == ':' ? "parameter null or not set" : "parameter not set")*/ + if (exp_op == '+' || exp_op == '-') { + /* ${var+word} - use alternative value */ + /* ${var-word} - use default value */ + n = encode_then_append_var_plusminus(output, n, exp_word, + /*dquoted:*/ (arg0 & 0x80) ); + val = NULL; + } else { + /* ${var?word} - indicate error if unset */ + /* ${var=word} - assign and use default value */ + to_be_freed = encode_then_expand_vararg(exp_word, + /*handle_squotes:*/ !(arg0 & 0x80), + /*unbackslash:*/ 0 + ); + if (to_be_freed) + exp_word = to_be_freed; + if (exp_op == '?') { + /* mimic bash message */ + msg_and_die_if_script("%s: %s", + var, + exp_word[0] + ? exp_word + : "parameter null or not set" + /* ash has more specific messages, a-la: */ + /*: (exp_save == ':' ? "parameter null or not set" : "parameter not set")*/ + ); //TODO: how interactive bash aborts expansion mid-command? //It aborts the entire line, returns to prompt: // $ f() { for i; do echo "|$i|"; done; }; x=; f "${x:?'x y' z}"; echo YO // bash: x: x y z // $ // ("echo YO" is not executed, neither the f function call) - } else { - val = exp_word; - } - - if (exp_op == '=') { - /* ${var=[word]} or ${var:=[word]} */ - if (isdigit(var[0]) || var[0] == '#') { - /* mimic bash message */ - msg_and_die_if_script("$%s: cannot assign in this way", var); - val = NULL; } else { - char *new_var = xasprintf("%s=%s", var, val); - set_local_var(new_var, /*flag:*/ 0); + val = exp_word; + } + if (exp_op == '=') { + /* ${var=[word]} or ${var:=[word]} */ + if (isdigit(var[0]) || var[0] == '#') { + /* mimic bash message */ + msg_and_die_if_script("$%s: cannot assign in this way", var); + val = NULL; + } else { + char *new_var = xasprintf("%s=%s", var, val); + set_local_var(new_var, /*flag:*/ 0); + } } } } @@ -6482,8 +6622,9 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg) } debug_print_list("expand_vars_to_list[a]", output, n); /* this part is literal, and it was already pre-quoted - * if needed (much earlier), do not use o_addQstr here! */ - o_addstr_with_NUL(output, arg); + * if needed (much earlier), do not use o_addQstr here! + */ + o_addstr(output, arg); debug_print_list("expand_vars_to_list[b]", output, n); } else if (output->length == o_get_last_ptr(output, n) /* expansion is empty */ && !(cant_be_null & 0x80) /* and all vars were not quoted. */ @@ -6491,8 +6632,6 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg) n--; /* allow to reuse list[n] later without re-growth */ output->has_empty_slot = 1; - } else { - o_addchr(output, '\0'); } return n; @@ -6517,6 +6656,8 @@ static char **expand_variables(char **argv, unsigned expflags) /* expand argv[i] */ n = expand_vars_to_list(&output, n, *argv++); + /* if (!output->has_empty_slot) -- need this?? */ + o_addchr(&output, '\0'); } debug_print_list("expand_variables", &output, n); diff --git a/shell/hush_test/hush-quoting/dollar_altvalue9.right b/shell/hush_test/hush-quoting/dollar_altvalue9.right new file mode 100644 index 000000000..fc6c2697c --- /dev/null +++ b/shell/hush_test/hush-quoting/dollar_altvalue9.right @@ -0,0 +1,24 @@ +Unquoted 1: +|a| +|x y| +|1| +|2| +|1 2| +|A| +|B| +|C D| +|zb| +Quoted 1: +|a 'x y' 1 2 '' 1 2 A B C D zb| +Unquoted 2: +|ax y| +|1| +|2| +|1 2| +|A| +|B| +|C D| +|z| +|b| +Quoted 2: +|a 'x y' 1 2 '' 1 2 A B C D z b| diff --git a/shell/hush_test/hush-quoting/dollar_altvalue9.tests b/shell/hush_test/hush-quoting/dollar_altvalue9.tests new file mode 100755 index 000000000..27a6f4f3c --- /dev/null +++ b/shell/hush_test/hush-quoting/dollar_altvalue9.tests @@ -0,0 +1,17 @@ +f() { for i; do echo "|$i|"; done; } + +echo Unquoted 1: +x='1 2'; f a${x:+ 'x y' $x '' "$x" `echo A B` "`echo C D`" z}b +echo Quoted 1: +x='1 2'; f "a${x:+ 'x y' $x '' "$x" `echo A B` "`echo C D`" z}b" + +echo Unquoted 2: +x='1 2'; f a${x:+'x y' $x '' "$x" `echo A B` "`echo C D`" z }b +echo Quoted 2: +x='1 2'; f "a${x:+ 'x y' $x '' "$x" `echo A B` "`echo C D`" z }b" + +#echo Unquoted 3: +#e= +#x='1 2'; f a${x:+'x y' $x '' "$x" $e $e "$e" $e `echo A B` "`echo C D`" z }b +#echo Quoted 3: +#x='1 2'; f "a${x:+ 'x y' $x '' "$x" $e $e "$e" $e `echo A B` "`echo C D`" z }b" |