diff options
Diffstat (limited to 'shell/hush.c')
| -rw-r--r-- | shell/hush.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/shell/hush.c b/shell/hush.c index 6c47be8..48f503c 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -462,7 +462,10 @@ # define MINUS_PLUS_EQUAL_QUESTION ("%#:-=+?" + 3) #endif -#define SPECIAL_VAR_SYMBOL 3 +#define SPECIAL_VAR_SYMBOL_STR "\3" +#define SPECIAL_VAR_SYMBOL 3 +/* The "variable" with name "\1" emits string "\3". Testcase: "echo ^C" */ +#define SPECIAL_VAR_QUOTED_SVS 1 struct variable; @@ -4899,7 +4902,8 @@ static struct pipe *parse_stream(char **pstring, next = i_peek(input); is_special = "{}<>;&|()#'" /* special outside of "str" */ - "\\$\"" IF_HUSH_TICK("`"); /* always special */ + "\\$\"" IF_HUSH_TICK("`") /* always special */ + SPECIAL_VAR_SYMBOL_STR; /* Are { and } special here? */ if (ctx.command->argv /* word [word]{... - non-special */ || dest.length /* word{... - non-special */ @@ -5171,8 +5175,14 @@ static struct pipe *parse_stream(char **pstring, /* Note: nommu_addchr(&ctx.as_string, ch) is already done */ switch (ch) { - case '#': /* non-comment #: "echo a#b" etc */ - o_addQchr(&dest, ch); + case SPECIAL_VAR_SYMBOL: + /* Convert raw ^C to corresponding special variable reference */ + o_addchr(&dest, SPECIAL_VAR_SYMBOL); + o_addchr(&dest, SPECIAL_VAR_QUOTED_SVS); + /* fall through */ + case '#': + /* non-comment #: "echo a#b" etc */ + o_addchr(&dest, ch); break; case '\\': if (next == EOF) { @@ -6026,6 +6036,11 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg) arg++; cant_be_null = 0x80; break; + case SPECIAL_VAR_QUOTED_SVS: + /* <SPECIAL_VAR_SYMBOL><SPECIAL_VAR_QUOTED_SVS><SPECIAL_VAR_SYMBOL> */ + arg++; + val = SPECIAL_VAR_SYMBOL_STR; + break; #if ENABLE_HUSH_TICK case '`': /* <SPECIAL_VAR_SYMBOL>`cmd<SPECIAL_VAR_SYMBOL> */ *p = '\0'; /* replace trailing <SPECIAL_VAR_SYMBOL> */ |