[PATCH for-5.1 5/8] qemu-option: Fix has_help_option()'s sloppy parsing

[Markus Armbruster <armbru@redhat.com>]

has_help_option() uses its own parser.  It's inconsistent with
qemu_opts_parse(), as demonstrated by test-qemu-opts case
/qemu-opts/has_help_option.  Fix by reusing the common parser.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 tests/test-qemu-opts.c |  2 +-
 util/qemu-option.c     | 39 +++++++++++++++++++--------------------
 2 files changed, 20 insertions(+), 21 deletions(-)

diff --git a/tests/test-qemu-opts.c b/tests/test-qemu-opts.c
index 27c24bb1a2..58a4ea2408 100644
--- a/tests/test-qemu-opts.c
+++ b/tests/test-qemu-opts.c
@@ -744,7 +744,7 @@ static void test_has_help_option(void)
         { "a,help", true, true, true },
         { "a=0,help,b", true, true, true },
         { "help,b=1", true, true, false },
-        { "a,b,,help", false /* BUG */, true, true },
+        { "a,b,,help", true, true, true },
     };
     int i;
     QemuOpts *opts;
diff --git a/util/qemu-option.c b/util/qemu-option.c
index 6403e521fc..279f1b3fb3 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -165,26 +165,6 @@ void parse_option_size(const char *name, const char *value,
     *ret = size;
 }
 
-bool has_help_option(const char *param)
-{
-    const char *p = param;
-    bool result = false;
-
-    while (*p && !result) {
-        char *value;
-
-        p = get_opt_value(p, &value);
-        if (*p) {
-            p++;
-        }
-
-        result = is_help_option(value);
-        g_free(value);
-    }
-
-    return result;
-}
-
 bool is_valid_option_list(const char *p)
 {
     char *value = NULL;
@@ -890,6 +870,25 @@ static char *opts_parse_id(const char *params)
     return NULL;
 }
 
+bool has_help_option(const char *params)
+{
+    const char *p;
+    char *name, *value;
+    bool ret;
+
+    for (p = params; *p;) {
+        p = get_opt_name_value(p, NULL, &name, &value);
+        ret = !strcmp(name, "help");
+        g_free(name);
+        g_free(value);
+        if (ret) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
 /**
  * Store options parsed from @params into @opts.
  * If @firstname is non-null, the first key=value in @params may omit
-- 
2.21.1