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-rw-r--r--shell/hush.c105
1 files changed, 70 insertions, 35 deletions
diff --git a/shell/hush.c b/shell/hush.c
index 77a305191..8b218aba9 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -1213,28 +1213,63 @@ static void o_addstr(o_string *o, const char *str, int len)
/* My analysis of quoting semantics tells me that state information
* is associated with a destination, not a source.
*/
-static void o_addqchr(o_string *o, int ch, int quote)
+static void o_addqchr(o_string *o, int ch)
{
- if (quote && strchr("*?[\\", ch)) {
- o_addchr(o, '\\');
+ int sz = 1;
+ if (strchr("*?[\\", ch)) {
+ sz++;
+ o->data[o->length] = '\\';
+ o->length++;
}
- o_addchr(o, ch);
+ o_grow_by(o, sz);
+ o->data[o->length] = ch;
+ o->length++;
+ o->data[o->length] = '\0';
+}
+
+static void o_addQchr(o_string *o, int ch)
+{
+ int sz = 1;
+ if (o->o_quote && strchr("*?[\\", ch)) {
+ sz++;
+ o->data[o->length] = '\\';
+ o->length++;
+ }
+ o_grow_by(o, sz);
+ o->data[o->length] = ch;
+ o->length++;
+ o->data[o->length] = '\0';
}
-static void o_addqstr(o_string *o, const char *str, int len, int quote)
+static void o_addQstr(o_string *o, const char *str, int len)
{
- char ch;
- if (!quote || str[strcspn(str, "*?[\\")] == '\0') {
+ if (!o->o_quote) {
o_addstr(o, str, len);
return;
}
while (len) {
+ char ch;
+ int sz;
+ int ordinary_cnt = strcspn(str, "*?[\\");
+ if (ordinary_cnt > len) /* paranoia */
+ ordinary_cnt = len;
+ o_addstr(o, str, ordinary_cnt);
+ if (ordinary_cnt == len)
+ return;
+ str += ordinary_cnt;
+ len -= ordinary_cnt - 1; /* we are processing + 1 char below */
+
ch = *str++;
- if (ch && strchr("*?[\\", ch)) {
- o_addchr(o, '\\');
+ sz = 1;
+ if (ch) { /* it is necessarily one of "*?[\\" */
+ sz++;
+ o->data[o->length] = '\\';
+ o->length++;
}
- o_addchr(o, ch);
- len--;
+ o_grow_by(o, sz);
+ o->data[o->length] = ch;
+ o->length++;
+ o->data[o->length] = '\0';
}
}
@@ -2566,7 +2601,7 @@ static int expand_on_ifs(o_string *output, int n, const char *str)
while (1) {
int word_len = strcspn(str, ifs);
if (word_len) {
- o_addqstr(output, str, word_len, output->o_quote);
+ o_addQstr(output, str, word_len);
str += word_len;
}
if (!*str) /* EOL - do not finalize word */
@@ -2607,7 +2642,7 @@ static int expand_vars_to_list(o_string *output, int n, char *arg, char or_mask)
while ((p = strchr(arg, SPECIAL_VAR_SYMBOL)) != NULL) {
o_string subst_result = NULL_O_STRING;
- o_addqstr(output, arg, p - arg, output->o_quote);
+ o_addQstr(output, arg, p - arg);
o_debug_list("expand_vars_to_list[1]", output, n);
arg = ++p;
p = strchr(p, SPECIAL_VAR_SYMBOL);
@@ -2653,7 +2688,7 @@ static int expand_vars_to_list(o_string *output, int n, char *arg, char or_mask)
* and in this case should treat it like '$*' - see 'else...' below */
if (first_ch == ('@'|0x80) && !or_mask) { /* quoted $@ */
while (1) {
- o_addqstr(output, global_argv[i], strlen(global_argv[i]), output->o_quote);
+ o_addQstr(output, global_argv[i], strlen(global_argv[i]));
if (++i >= global_argc)
break;
o_addchr(output, '\0');
@@ -2662,7 +2697,7 @@ static int expand_vars_to_list(o_string *output, int n, char *arg, char or_mask)
}
} else { /* quoted $*: add as one word */
while (1) {
- o_addqstr(output, global_argv[i], strlen(global_argv[i]), output->o_quote);
+ o_addQstr(output, global_argv[i], strlen(global_argv[i]));
if (!global_argv[++i])
break;
if (ifs[0])
@@ -2702,7 +2737,7 @@ static int expand_vars_to_list(o_string *output, int n, char *arg, char or_mask)
} /* else: quoted $VAR, val will be appended below */
}
if (val) {
- o_addqstr(output, val, strlen(val), output->o_quote);
+ o_addQstr(output, val, strlen(val));
}
o_free(&subst_result);
@@ -2711,7 +2746,7 @@ static int expand_vars_to_list(o_string *output, int n, char *arg, char or_mask)
if (arg[0]) {
o_debug_list("expand_vars_to_list[a]", output, n);
- o_addqstr(output, arg, strlen(arg) + 1, output->o_quote);
+ o_addQstr(output, arg, strlen(arg) + 1);
o_debug_list("expand_vars_to_list[b]", output, n);
} else if (output->length == o_get_last_ptr(output, n) /* expansion is empty */
&& !(ored_ch & 0x80) /* and all vars were not quoted. */
@@ -3335,10 +3370,10 @@ static int process_command_subs(o_string *dest,
continue;
}
while (eol_cnt) {
- o_addqchr(dest, '\n', dest->o_quote);
+ o_addQchr(dest, '\n');
eol_cnt--;
}
- o_addqchr(dest, ch, dest->o_quote);
+ o_addQchr(dest, ch);
}
debug_printf("done reading from pipe, pclose()ing\n");
@@ -3407,7 +3442,7 @@ static void add_till_single_quote(o_string *dest, struct in_str *input)
break;
if (ch == '\'')
break;
- o_addqchr(dest, ch, 1);
+ o_addqchr(dest, ch);
}
}
/* "...\"...`..`...." - do we need to handle "...$(..)..." too? */
@@ -3418,15 +3453,15 @@ static void add_till_double_quote(o_string *dest, struct in_str *input)
if (ch == '"')
break;
if (ch == '\\') { /* \x. Copy both chars. */
- o_addqchr(dest, ch, 1);
+ o_addqchr(dest, ch);
ch = i_getch(input);
}
if (ch == EOF)
break;
- o_addqchr(dest, ch, 1);
+ o_addqchr(dest, ch);
if (ch == '`') {
add_till_backquote(dest, input);
- o_addqchr(dest, ch, 1);
+ o_addqchr(dest, ch);
continue;
}
// if (ch == '$') ...
@@ -3455,12 +3490,12 @@ static void add_till_backquote(o_string *dest, struct in_str *input)
if (ch == '\\') { /* \x. Copy both chars unless it is \` */
int ch2 = i_getch(input);
if (ch2 != '`' && ch2 != '$' && ch2 != '\\')
- o_addqchr(dest, ch, 1);
+ o_addqchr(dest, ch);
ch = ch2;
}
if (ch == EOF)
break;
- o_addqchr(dest, ch, 1);
+ o_addqchr(dest, ch);
}
}
/* Process $(cmd) - copy contents until ")" is seen. Complicated by
@@ -3487,22 +3522,22 @@ static void add_till_closing_curly_brace(o_string *dest, struct in_str *input)
if (ch == ')')
if (--count < 0)
break;
- o_addqchr(dest, ch, 1);
+ o_addqchr(dest, ch);
if (ch == '\'') {
add_till_single_quote(dest, input);
- o_addqchr(dest, ch, 1);
+ o_addqchr(dest, ch);
continue;
}
if (ch == '"') {
add_till_double_quote(dest, input);
- o_addqchr(dest, ch, 1);
+ o_addqchr(dest, ch);
continue;
}
if (ch == '\\') { /* \x. Copy verbatim. Important for \(, \) */
ch = i_getch(input);
if (ch == EOF)
break;
- o_addqchr(dest, ch, 1);
+ o_addqchr(dest, ch);
continue;
}
}
@@ -3581,7 +3616,7 @@ static int handle_dollar(o_string *dest, struct in_str *input)
return 1;
break;
default:
- o_addqchr(dest, '$', dest->o_quote);
+ o_addQchr(dest, '$');
}
debug_printf_parse("handle_dollar return 0\n");
return 0;
@@ -3621,7 +3656,7 @@ static int parse_stream(o_string *dest, struct p_context *ctx,
debug_printf_parse("parse_stream return 1: unterminated \"\n");
return 1;
}
- o_addqchr(dest, ch, dest->o_quote);
+ o_addQchr(dest, ch);
continue;
}
if (m == CHAR_IFS) {
@@ -3656,7 +3691,7 @@ static int parse_stream(o_string *dest, struct p_context *ctx,
i_getch(input);
}
} else {
- o_addqchr(dest, ch, dest->o_quote);
+ o_addQchr(dest, ch);
}
break;
case '\\':
@@ -3676,9 +3711,9 @@ static int parse_stream(o_string *dest, struct p_context *ctx,
*/
if (dest->o_quote) {
if (strchr("$`\"\\", next) != NULL) {
- o_addqchr(dest, i_getch(input), 1);
+ o_addqchr(dest, i_getch(input));
} else {
- o_addqchr(dest, '\\', 1);
+ o_addqchr(dest, '\\');
}
} else {
o_addchr(dest, '\\');
@@ -3697,7 +3732,7 @@ static int parse_stream(o_string *dest, struct p_context *ctx,
ch = i_getch(input);
if (ch == EOF || ch == '\'')
break;
- o_addqchr(dest, ch, 1);
+ o_addqchr(dest, ch);
}
if (ch == EOF) {
syntax("unterminated '");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 20:18:28 +0000