strv: Add _cleanup_strv_free_erase_ and _cleanup_string_free_erase_

src/basic/strv.c

@@ -86,6 +86,15 @@ char **strv_free(char **l) {
         return NULL;
 }
 
+char **strv_free_erase(char **l) {
+        char **i;
+
+        STRV_FOREACH(i, l)
+                string_erase(*i);
+
+        return strv_free(l);
+}
+
 char **strv_copy(char * const *l) {
         char **r, **k;
 

src/basic/strv.h

@@ -35,6 +35,10 @@ char **strv_free(char **l);
 DEFINE_TRIVIAL_CLEANUP_FUNC(char**, strv_free);
 #define _cleanup_strv_free_ _cleanup_(strv_freep)
 
+char **strv_free_erase(char **l);
+DEFINE_TRIVIAL_CLEANUP_FUNC(char**, strv_free_erase);
+#define _cleanup_strv_free_erase_ _cleanup_(strv_free_erasep)
+
 void strv_clear(char **l);
 
 char **strv_copy(char * const *l);

src/basic/util.c

@@ -6817,9 +6817,10 @@ void string_erase(char *x) {
         memory_erase(x, strlen(x));
 }
 
-void strv_erase(char **l) {
-        char **i;
+char *string_free_erase(char *s) {
+        if (!s)
+                return NULL;
 
-        STRV_FOREACH(i, l)
-                string_erase(*i);
+        string_erase(s);
+        return mfree(s);
 }

src/basic/util.h

@@ -946,4 +946,7 @@ bool oom_score_adjust_is_valid(int oa);
 
 #define memory_erase(p, l) memset((p), 'x', (l))
 void string_erase(char *x);
-void strv_erase(char **l);
+
+char *string_free_erase(char *s);
+DEFINE_TRIVIAL_CLEANUP_FUNC(char *, string_free_erase);
+#define _cleanup_string_free_erase_ _cleanup_(string_free_erasep)