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authorDenys Vlasenko2018-06-26 15:36:58 +0200
committerDenys Vlasenko2018-06-26 15:36:58 +0200
commit99496dc7160552824d6146ec951b2f7b03a51759 (patch)
tree26f501d395d80450eaed690c13442651d202bd94 /shell
parent817a20296fd9e4e8eed095836d7dc28183794247 (diff)
downloadbusybox-99496dc7160552824d6146ec951b2f7b03a51759.zip
busybox-99496dc7160552824d6146ec951b2f7b03a51759.tar.gz
hush: variable nesting code is used also if HUSH_FUNCTIONS is not enabled
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell')
-rw-r--r--shell/hush.c104
1 files changed, 52 insertions, 52 deletions
diff --git a/shell/hush.c b/shell/hush.c
index 0b36dad..738a6b2 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -7314,6 +7314,58 @@ static const struct built_in_command *find_builtin(const char *name)
return find_builtin_helper(name, bltins2, &bltins2[ARRAY_SIZE(bltins2)]);
}
+static void remove_nested_vars(void)
+{
+ struct variable *cur;
+ struct variable **cur_pp;
+
+ cur_pp = &G.top_var;
+ while ((cur = *cur_pp) != NULL) {
+ if (cur->var_nest_level <= G.var_nest_level) {
+ cur_pp = &cur->next;
+ continue;
+ }
+ /* Unexport */
+ if (cur->flg_export) {
+ debug_printf_env("unexporting nested '%s'/%u\n", cur->varstr, cur->var_nest_level);
+ bb_unsetenv(cur->varstr);
+ }
+ /* Remove from global list */
+ *cur_pp = cur->next;
+ /* Free */
+ if (!cur->max_len) {
+ debug_printf_env("freeing nested '%s'/%u\n", cur->varstr, cur->var_nest_level);
+ free(cur->varstr);
+ }
+ free(cur);
+ }
+}
+
+static void enter_var_nest_level(void)
+{
+ G.var_nest_level++;
+ debug_printf_env("var_nest_level++ %u\n", G.var_nest_level);
+
+ /* Try: f() { echo -n .; f; }; f
+ * struct variable::var_nest_level is uint16_t,
+ * thus limiting recursion to < 2^16.
+ * In any case, with 8 Mbyte stack SEGV happens
+ * not too long after 2^16 recursions anyway.
+ */
+ if (G.var_nest_level > 0xff00)
+ bb_error_msg_and_die("fatal recursion (depth %u)", G.var_nest_level);
+}
+
+static void leave_var_nest_level(void)
+{
+ G.var_nest_level--;
+ debug_printf_env("var_nest_level-- %u\n", G.var_nest_level);
+ if (HUSH_DEBUG && (int)G.var_nest_level < 0)
+ bb_error_msg_and_die("BUG: nesting underflow");
+
+ remove_nested_vars();
+}
+
#if ENABLE_HUSH_FUNCTIONS
static struct function **find_function_slot(const char *name)
{
@@ -7400,58 +7452,6 @@ static void unset_func(const char *name)
}
# endif
-static void remove_nested_vars(void)
-{
- struct variable *cur;
- struct variable **cur_pp;
-
- cur_pp = &G.top_var;
- while ((cur = *cur_pp) != NULL) {
- if (cur->var_nest_level <= G.var_nest_level) {
- cur_pp = &cur->next;
- continue;
- }
- /* Unexport */
- if (cur->flg_export) {
- debug_printf_env("unexporting nested '%s'/%u\n", cur->varstr, cur->var_nest_level);
- bb_unsetenv(cur->varstr);
- }
- /* Remove from global list */
- *cur_pp = cur->next;
- /* Free */
- if (!cur->max_len) {
- debug_printf_env("freeing nested '%s'/%u\n", cur->varstr, cur->var_nest_level);
- free(cur->varstr);
- }
- free(cur);
- }
-}
-
-static void enter_var_nest_level(void)
-{
- G.var_nest_level++;
- debug_printf_env("var_nest_level++ %u\n", G.var_nest_level);
-
- /* Try: f() { echo -n .; f; }; f
- * struct variable::var_nest_level is uint16_t,
- * thus limiting recursion to < 2^16.
- * In any case, with 8 Mbyte stack SEGV happens
- * not too long after 2^16 recursions anyway.
- */
- if (G.var_nest_level > 0xff00)
- bb_error_msg_and_die("fatal recursion (depth %u)", G.var_nest_level);
-}
-
-static void leave_var_nest_level(void)
-{
- G.var_nest_level--;
- debug_printf_env("var_nest_level-- %u\n", G.var_nest_level);
- if (HUSH_DEBUG && (int)G.var_nest_level < 0)
- bb_error_msg_and_die("BUG: nesting underflow");
-
- remove_nested_vars();
-}
-
# if BB_MMU
#define exec_function(to_free, funcp, argv) \
exec_function(funcp, argv)