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hush: make parse_dollar flag quited status regardless of glob escaping status

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function                                             old     new   delta
parse_stream_dquoted                                 228     233      +5
parse_stream                                        2369    2371      +2
parse_dollar                                         730     717     -13
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 7/-13)              Total: -6 bytes

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
This commit is contained in:
Denys Vlasenko 2010-09-09 14:04:57 +02:00
parent 5b6210cf49
commit 101a4e3e21
3 changed files with 22 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
shell/hush.c
View File

@ -3525,16 +3525,15 @@ static int add_till_closing_bracket(o_string *dest, struct in_str *input, unsign
/* Return code: 0 for OK, 1 for syntax error */
#if BB_MMU
#define parse_dollar(as_string, dest, input) \
parse_dollar(dest, input)
#define parse_dollar(as_string, dest, input, quote_mask) \
parse_dollar(dest, input, quote_mask)
#define as_string NULL
#endif
static int parse_dollar(o_string *as_string,
o_string *dest,
struct in_str *input)
struct in_str *input, unsigned char quote_mask)
{
int ch = i_peek(input); /* first character after the $ */
unsigned char quote_mask = (dest->o_expflags & EXP_FLAG_ESC_GLOB_CHARS) ? 0x80 : 0;
debug_printf_parse("parse_dollar entered: ch='%c'\n", ch);
if (isalpha(ch)) {
@ -3576,17 +3575,19 @@ static int parse_dollar(o_string *as_string,
nommu_addchr(as_string, ch);
ch = i_getch(input); /* first char after '{' */
nommu_addchr(as_string, ch);
/* It should be ${?}, or ${#var},
* or even ${?+subst} - operator acting on a special variable,
* or the beginning of variable name.
*/
if (!strchr(_SPECIAL_VARS_STR, ch) && !isalnum(ch)) { /* not one of those */
if (ch == EOF
|| (!strchr(_SPECIAL_VARS_STR, ch) && !isalnum(ch)) /* not one of those */
) {
bad_dollar_syntax:
syntax_error_unterm_str("${name}");
debug_printf_parse("parse_dollar return 1: unterminated ${name}\n");
return 1;
}
nommu_addchr(as_string, ch);
ch |= quote_mask;
/* It's possible to just call add_till_closing_bracket() at this point.
@ -3785,7 +3786,7 @@ static int parse_stream_dquoted(o_string *as_string,
goto again;
}
if (ch == '$') {
if (parse_dollar(as_string, dest, input) != 0) {
if (parse_dollar(as_string, dest, input, /*quote_mask:*/ 0x80) != 0) {
debug_printf_parse("parse_stream_dquoted return 1: "
"parse_dollar returned non-0\n");
return 1;
@ -4135,7 +4136,7 @@ static struct pipe *parse_stream(char **pstring,
#endif
break;
case '$':
if (parse_dollar(&ctx.as_string, &dest, input) != 0) {
if (parse_dollar(&ctx.as_string, &dest, input, /*quote_mask:*/ 0) != 0) {
debug_printf_parse("parse_stream parse error: "
"parse_dollar returned non-0\n");
goto parse_error;

20
shell/hush_test/hush-vars/var_unbackslash.right
View File

@ -1,11 +1,11 @@
b1=-qwerty-t-\-"---z-*-?-
b1=-qwerty-t-\-"---z-*-?-
b2=-qwerty-\t-\-"-\--\z-\*-\?-
b2=-qwerty-\t-\-"-\--\z-\*-\?-
b3=-$a-\t-\\-\"-\--\z-\*-\?-
b3=-$a-\t-\\-\"-\--\z-\*-\?-
c=-$a-\t-\\-\"-\--\z-\*-\?-
c=-$a-\t-\\-\"-\--\z-\*-\?-
c=-$a-\t-\\-\"-\--\z-\*-\?-
c=-$a-\t-\\-\"-\--\z-\*-\?-
b1=-qwerty-t-\-"-`---z-*-?-
b1=-qwerty-t-\-"-`---z-*-?-
b2=-qwerty-\t-\-"-`-\--\z-\*-\?-
b2=-qwerty-\t-\-"-`-\--\z-\*-\?-
b3=-$a-\t-\\-\"-\`-\--\z-\*-\?-
b3=-$a-\t-\\-\"-\`-\--\z-\*-\?-
c=-$a-\t-\\-\"-\`-\--\z-\*-\?-
c=-$a-\t-\\-\"-\`-\--\z-\*-\?-
c=-$a-\t-\\-\"-\`-\--\z-\*-\?-
c=-$a-\t-\\-\"-\`-\--\z-\*-\?-
Done: 0

6
shell/hush_test/hush-vars/var_unbackslash.tests
View File

@ -1,13 +1,13 @@
# Test for correct handling of backslashes
a=qwerty
b=-$a-\t-\\-\"-\--\z-\*-\?-
b=-$a-\t-\\-\"-\`-\--\z-\*-\?-
echo b1=$b
echo "b1=$b"
b="-$a-\t-\\-\"-\--\z-\*-\?-"
b="-$a-\t-\\-\"-\`-\--\z-\*-\?-"
echo b2=$b
echo "b2=$b"
b='-$a-\t-\\-\"-\--\z-\*-\?-'
b='-$a-\t-\\-\"-\`-\--\z-\*-\?-'
echo b3=$b
echo "b3=$b"