QemuOpts: Add qemu_opt_unset()

Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
qemu · Jul 26, 2013 · 0dd6c52 · 0dd6c52
1 parent 74fe54f
commit 0dd6c52
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Showing 2 changed files with 15 additions and 0 deletions.
diff --git 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
@@ -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)
 {