[PATCH v2 3/3] ui: deprecate "password" option for SPICE server

["Daniel P. Berrangé" <berrange@redhat.com>]

With the new "password-secret" option, there is no reason to use the old
inecure "password" option with -spice, so it can be deprecated.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 docs/system/deprecated.rst | 8 ++++++++
 qemu-options.hx            | 4 ++++
 ui/spice-core.c            | 2 ++
 3 files changed, 14 insertions(+)

diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst
index 241b28a521..e742c8d311 100644
--- a/docs/system/deprecated.rst
+++ b/docs/system/deprecated.rst
@@ -166,6 +166,14 @@ Using ``-M kernel-irqchip=off`` with x86 machine types that include a local
 APIC is deprecated.  The ``split`` setting is supported, as is using
 ``-M kernel-irqchip=off`` with the ISA PC machine type.
 
+``-spice password=string`` (since 6.0)
+''''''''''''''''''''''''''''''''''''''
+
+This option is insecure because the SPICE password remains visible in
+the process listing. This is replaced by the new ``password-secret``
+option which lets the password be securely provided on the command
+line using a ``secret`` object instance.
+
 QEMU Machine Protocol (QMP) commands
 ------------------------------------
 
diff --git a/qemu-options.hx b/qemu-options.hx
index 77bb834e37..48382a8a2a 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1928,6 +1928,10 @@ SRST
     ``password=<string>``
         Set the password you need to authenticate.
 
+        This option is deprecated and insecure because it leaves the
+        password visible in the process listing. Use ``password-secret``
+        instead.
+
     ``password-secret=<secret-id>``
         Set the ID of the ``secret`` object containing the password
         you need to authenticate.
diff --git a/ui/spice-core.c b/ui/spice-core.c
index 7f0e005ca9..235d61f0c1 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -686,6 +686,8 @@ static void qemu_spice_init(void)
     } else {
         str = qemu_opt_get(opts, "password");
         if (str) {
+            warn_report("'password' option is deprecated and insecure, "
+                        "use 'password-secret' instead");
             password = g_strdup(str);
         }
     }
-- 
2.29.2