QemuOpts: Add qemu_opt_unset()

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

diff --git a/include/qemu/option.h b/include/qemu/option.h
index a83c700323ee7883e550a091e6cd97adb8f1c17f..13f5e72a8eb5532f5a9f5a5e417703dbd574aeba 100644 (file)
--- a/include/qemu/option.h
+++ b/include/qemu/option.h
@@ -120,6 +120,7 @@ bool qemu_opt_has_help_opt(QemuOpts *opts);
 bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval);
 uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval);
 uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval);
+int qemu_opt_unset(QemuOpts *opts, const char *name);
 int qemu_opt_set(QemuOpts *opts, const char *name, const char *value);
 void qemu_opt_set_err(QemuOpts *opts, const char *name, const char *value,
                       Error **errp);

diff --git a/util/qemu-option.c b/util/qemu-option.c
index e0ef426daa009a95180b8ec0c743c53ecf77d3f9..5d686c805fabf652312e0ae0e2501ec16c43223e 100644 (file)
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -593,6 +593,20 @@ static const QemuOptDesc *find_desc_by_name(const QemuOptDesc *desc,
     return NULL;
 }
 
+int qemu_opt_unset(QemuOpts *opts, const char *name)
+{
+    QemuOpt *opt = qemu_opt_find(opts, name);
+
+    assert(opts_accepts_any(opts));
+
+    if (opt == NULL) {
+        return -1;
+    } else {
+        qemu_opt_del(opt);
+        return 0;
+    }
+}
+
 static void opt_set(QemuOpts *opts, const char *name, const char *value,
                     bool prepend, Error **errp)
 {