diff options
| -rw-r--r-- | shell/hush.c | 91 |
1 files changed, 43 insertions, 48 deletions
diff --git a/shell/hush.c b/shell/hush.c index 2da288c15..dddba5e30 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -4471,7 +4471,6 @@ static int parse_group(struct parse_context *ctx, #if ENABLE_HUSH_TICK || ENABLE_FEATURE_SH_MATH || ENABLE_HUSH_DOLLAR_OPS /* Subroutines for copying $(...) and `...` things */ -static int add_till_backquote(o_string *dest, struct in_str *input, int in_dquote); /* '...' */ static int add_till_single_quote(o_string *dest, struct in_str *input) { @@ -4486,7 +4485,21 @@ static int add_till_single_quote(o_string *dest, struct in_str *input) o_addchr(dest, ch); } } +static int add_till_single_quote_dquoted(o_string *dest, struct in_str *input) +{ + while (1) { + int ch = i_getch(input); + if (ch == EOF) { + syntax_error_unterm_ch('\''); + return 0; + } + if (ch == '\'') + return 1; + o_addqchr(dest, ch); + } +} /* "...\"...`..`...." - do we need to handle "...$(..)..." too? */ +static int add_till_backquote(o_string *dest, struct in_str *input, int in_dquote); static int add_till_double_quote(o_string *dest, struct in_str *input) { while (1) { @@ -5599,6 +5612,7 @@ static char *expand_string_to_string(const char *str, int EXP_flags, int do_unba #if ENABLE_HUSH_TICK static int process_command_subs(o_string *dest, const char *s); #endif +static int expand_vars_to_list(o_string *output, int n, char *arg); /* expand_strvec_to_strvec() takes a list of strings, expands * all variable references within and returns a pointer to @@ -5755,6 +5769,13 @@ static char *encode_then_expand_string(const char *str) return exp_str; } +/* Expanding ARG in ${var#ARG}, ${var%ARG}, or ${var/ARG/ARG}. + * These can contain single- and double-quoted strings, + * and treated as if the ARG string is initially unquoted. IOW: + * ${var#ARG} and "${var#ARG}" treat ARG the same (ARG can even be + * a dquoted string: "${var#"zz"}"), the difference only comes later + * (word splitting and globbing of the ${var...} result). + */ #if !BASH_PATTERN_SUBST #define encode_then_expand_vararg(str, handle_squotes, do_unbackslash) \ encode_then_expand_vararg(str, handle_squotes) @@ -5782,14 +5803,6 @@ static char *encode_then_expand_vararg(const char *str, int handle_squotes, int cp++; } - /* Expanding ARG in ${var#ARG}, ${var%ARG}, or ${var/ARG/ARG}. - * These can contain single- and double-quoted strings, - * and treated as if the ARG string is initially unquoted. IOW: - * ${var#ARG} and "${var#ARG}" treat ARG the same (ARG can even be - * a dquoted string: "${var#"zz"}"), the difference only comes later - * (word splitting and globbing of the ${var...} result). - */ - setup_string_in_str(&input, str); dest.data = xzalloc(1); /* start as "", not as NULL */ exp_str = NULL; @@ -5798,28 +5811,21 @@ static char *encode_then_expand_vararg(const char *str, int handle_squotes, int int ch; ch = i_getch(&input); - if (ch == EOF) { - if (dest.o_expflags) { /* EXP_FLAG_ESC_GLOB_CHARS set? */ - syntax_error_unterm_ch('"'); - goto ret; /* error */ - } - break; - } debug_printf_parse("%s: ch=%c (%d) escape=%d\n", __func__, ch, ch, !!dest.o_expflags); - if (ch == '\'' && handle_squotes && !dest.o_expflags) { -//quoting version of add_till_single_quote() (try to merge?): - for (;;) { - ch = i_getch(&input); - if (ch == EOF) { - syntax_error_unterm_ch('\''); + + if (!dest.o_expflags) { + if (ch == EOF) + break; + if (handle_squotes && ch == '\'') { + if (!add_till_single_quote_dquoted(&dest, &input)) goto ret; /* error */ - } - if (ch == '\'') - break; - o_addqchr(&dest, ch); + continue; } - continue; + } + if (ch == EOF) { + syntax_error_unterm_ch('"'); + goto ret; /* error */ } if (ch == '"') { dest.o_expflags ^= EXP_FLAG_ESC_GLOB_CHARS; @@ -5872,8 +5878,8 @@ 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); - +/* Expanding ARG in ${var+ARG}, ${var-ARG} + */ static int encode_then_append_var_plusminus(o_string *output, int n, const char *str, int dquoted) { @@ -5896,8 +5902,6 @@ static int encode_then_append_var_plusminus(o_string *output, int n, } #endif - /* Expanding ARG in ${var+ARG}, ${var-ARG} */ - setup_string_in_str(&input, str); for (;;) { @@ -5938,17 +5942,8 @@ static int encode_then_append_var_plusminus(o_string *output, int n, 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); - } + if (!add_till_single_quote_dquoted(&dest, &input)) + goto ret; /* error */ o_addchr(&dest, SPECIAL_VAR_SYMBOL); o_addchr(&dest, SPECIAL_VAR_SYMBOL); continue; @@ -6105,11 +6100,10 @@ static int append_str_maybe_ifs_split(o_string *output, int n, return n; } -/* Helper: - * Handles <SPECIAL_VAR_SYMBOL>varname...<SPECIAL_VAR_SYMBOL> construct. +/* Handle <SPECIAL_VAR_SYMBOL>varname...<SPECIAL_VAR_SYMBOL> construct. */ -static NOINLINE int expand_one_var(o_string *output, - int n, int first_ch, char *arg, char **pp) +static NOINLINE int expand_one_var(o_string *output, int n, + int first_ch, char *arg, char **pp) { const char *val; char *to_be_freed; @@ -6385,7 +6379,7 @@ static NOINLINE int expand_one_var(o_string *output, * $ x=; f "${x:='x y' z}" * |'x y' z| * - * $ x=x; f ${x:+'x y' z}| + * $ x=x; f ${x:+'x y' z} * |x y| * |z| * $ x=x; f "${x:+'x y' z}" @@ -6620,7 +6614,8 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg) arg = ++p; } /* end of "while (SPECIAL_VAR_SYMBOL is found) ..." */ - if (arg[0]) { + if (*arg) { + /* handle trailing string */ if (output->ended_in_ifs) { o_addchr(output, '\0'); n = o_save_ptr(output, n); |