[libvirt] [PATCH v3 3/9] qemu: add helper for getting guest users

Jonathon Jongsma posted 9 patches 5 years, 3 months ago
[libvirt] [PATCH v3 3/9] qemu: add helper for getting guest users
Posted by Jonathon Jongsma 5 years, 3 months ago
This function fetches the list of logged-in users from the qemu agent
and adds them to a list of typed parameters so that they can be used
internally in libvirt.

Also add some basic tests for the function.

Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
---
 src/qemu/qemu_agent.c |  91 +++++++++++++++++++++++
 src/qemu/qemu_agent.h |   2 +
 tests/qemuagenttest.c | 168 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 261 insertions(+)

diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c
index 361db299a5..963a4b9359 100644
--- a/src/qemu/qemu_agent.c
+++ b/src/qemu/qemu_agent.c
@@ -2240,3 +2240,94 @@ qemuAgentSetUserPassword(qemuAgentPtr mon,
     VIR_FREE(password64);
     return ret;
 }
+
+int
+qemuAgentGetUsers(qemuAgentPtr mon,
+                  virTypedParameterPtr *params,
+                  int *nparams,
+                  int *maxparams)
+{
+    int ret = -1;
+    size_t i;
+    virJSONValuePtr cmd;
+    virJSONValuePtr reply = NULL;
+    virJSONValuePtr data = NULL;
+    size_t ndata;
+    const char *strvalue;
+
+    if (!(cmd = qemuAgentMakeCommand("guest-get-users", NULL)))
+        return -1;
+
+    if (qemuAgentCommand(mon, cmd, &reply, true,
+                         VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK) < 0)
+        goto cleanup;
+
+    if (!(data = virJSONValueObjectGetArray(reply, "return"))) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("guest-get-users reply was missing return data"));
+        goto cleanup;
+    }
+
+    if (!virJSONValueIsArray(data)) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("Malformed guest-get-users data array"));
+        goto cleanup;
+    }
+
+    ndata = virJSONValueArraySize(data);
+
+    if (virTypedParamsAddUInt(params, nparams, maxparams,
+                              "user.count", ndata) < 0)
+        goto cleanup;
+
+    for (i = 0; i < ndata; i++) {
+        char param_name[VIR_TYPED_PARAM_FIELD_LENGTH];
+        virJSONValuePtr entry = virJSONValueArrayGet(data, i);
+
+        if (!entry) {
+            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                           _("array element missing in guest-get-users return "
+                             "value"));
+            goto cleanup;
+        }
+
+        if (!(strvalue = virJSONValueObjectGetString(entry, "user"))) {
+            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                           _("'user' missing in reply of guest-get-users"));
+            goto cleanup;
+        }
+
+        snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH, "user.%zu.name", i);
+        if (virTypedParamsAddString(params, nparams, maxparams,
+                                    param_name, strvalue) < 0)
+            goto cleanup;
+
+        /* 'domain' is only present for windows guests */
+        if ((strvalue = virJSONValueObjectGetString(entry, "domain"))) {
+            snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
+                     "user.%zu.domain", i);
+            if (virTypedParamsAddString(params, nparams, maxparams,
+                                        param_name, strvalue) < 0)
+                goto cleanup;
+        }
+
+        double logintime;
+        if (virJSONValueObjectGetNumberDouble(entry, "login-time", &logintime) < 0) {
+            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                           _("'login-time' missing in reply of guest-get-users"));
+            goto cleanup;
+        }
+        snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
+                 "user.%zu.login-time", i);
+        if (virTypedParamsAddULLong(params, nparams, maxparams,
+                                    param_name, logintime * 1000) < 0)
+            goto cleanup;
+    }
+
+    ret = ndata;
+
+ cleanup:
+    virJSONValueFree(cmd);
+    virJSONValueFree(reply);
+    return ret;
+}
diff --git a/src/qemu/qemu_agent.h b/src/qemu/qemu_agent.h
index 6ae9fe54da..05621b521a 100644
--- a/src/qemu/qemu_agent.h
+++ b/src/qemu/qemu_agent.h
@@ -120,3 +120,5 @@ int qemuAgentSetUserPassword(qemuAgentPtr mon,
                              const char *user,
                              const char *password,
                              bool crypted);
+
+int qemuAgentGetUsers(qemuAgentPtr mon, virTypedParameterPtr *params, int *nparams, int *maxparams);
diff --git a/tests/qemuagenttest.c b/tests/qemuagenttest.c
index 2f79986207..f2936a59f0 100644
--- a/tests/qemuagenttest.c
+++ b/tests/qemuagenttest.c
@@ -902,6 +902,173 @@ testQemuAgentGetInterfaces(const void *data)
     return ret;
 }
 
+static const char testQemuAgentUsersResponse[] =
+    "{\"return\": "
+    "   ["
+    "       {\"user\": \"test\","
+    "        \"login-time\": 1561739203.584038"
+    "       },"
+    "       {\"user\": \"test2\","
+    "        \"login-time\": 1561739229.190697"
+    "       }"
+    "   ]"
+    "}";
+
+static const char testQemuAgentUsersResponse2[] =
+    "{\"return\": "
+    "   ["
+    "       {\"user\": \"test\","
+    "        \"domain\": \"DOMAIN\","
+    "        \"login-time\": 1561739203.584038"
+    "       }"
+    "   ]"
+    "}";
+
+static int getUserInfo(virTypedParameterPtr params, int nparams, size_t nth,
+                       const char **username, const char **domain,
+                       unsigned long long *logintime)
+{
+    char param_name[VIR_TYPED_PARAM_FIELD_LENGTH];
+
+    snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
+             "user.%zu.name", nth);
+    if (username &&
+        virTypedParamsGetString(params, nparams, param_name, username) < 0)
+        return -1;
+
+    snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
+             "user.%zu.domain", nth);
+    if (domain &&
+        virTypedParamsGetString(params, nparams, param_name, domain) < 0)
+        return -1;
+
+    snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
+             "user.%zu.login-time", nth);
+    if (logintime &&
+        virTypedParamsGetULLong(params, nparams, param_name, logintime) < 0)
+        return -1;
+
+    return 0;
+}
+
+static int
+testQemuAgentUsers(const void *data)
+{
+    virDomainXMLOptionPtr xmlopt = (virDomainXMLOptionPtr)data;
+    qemuMonitorTestPtr test = qemuMonitorTestNewAgent(xmlopt);
+    virTypedParameterPtr params = NULL;
+    int nparams = 0;
+    int maxparams = 0;
+    int ret = -1;
+    const char *username = NULL;
+    const char *domain = NULL;
+    unsigned long long logintime = 0;
+    unsigned int count;
+
+    if (!test)
+        return -1;
+
+    if (qemuMonitorTestAddAgentSyncResponse(test) < 0)
+        goto cleanup;
+
+    if (qemuMonitorTestAddItem(test, "guest-get-users",
+                               testQemuAgentUsersResponse) < 0)
+        goto cleanup;
+
+    /* get users */
+    if (qemuAgentGetUsers(qemuMonitorTestGetAgent(test),
+                          &params, &nparams, &maxparams) < 0)
+        goto cleanup;
+
+    if (virTypedParamsGetUInt(params, nparams, "user.count", &count) < 0)
+        goto cleanup;
+    if (count != 2) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       "Expected '2' users, got '%u'", count);
+        goto cleanup;
+    }
+
+    getUserInfo(params, nparams, 0, &username, NULL, &logintime);
+    if (!username) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s", "Missing username");
+        goto cleanup;
+    }
+    if (STRNEQ(username, "test")) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       "Expected user name 'test', got '%s'", username);
+        goto cleanup;
+    }
+    if (logintime != 1561739203584) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       "Expected login time of '1561739203584', got '%llu'",
+                       logintime);
+        goto cleanup;
+    }
+
+    getUserInfo(params, nparams, 1, &username, NULL, &logintime);
+    if (STRNEQ(username, "test2")) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       "Expected user name 'test2', got '%s'", username);
+        goto cleanup;
+    }
+    if (logintime != 1561739229190) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       "Expected login time of '1561739229190', got '%llu'",
+                       logintime);
+        goto cleanup;
+    }
+
+    if (qemuMonitorTestAddAgentSyncResponse(test) < 0)
+        goto cleanup;
+
+    if (qemuMonitorTestAddItem(test, "guest-get-users",
+                               testQemuAgentUsersResponse2) < 0)
+        goto cleanup;
+
+    virTypedParamsFree(params, nparams);
+    params = NULL;
+    nparams = 0;
+    maxparams = 0;
+
+    /* get users with domain */
+    if (qemuAgentGetUsers(qemuMonitorTestGetAgent(test),
+                          &params, &nparams, &maxparams) < 0)
+        goto cleanup;
+
+    if (virTypedParamsGetUInt(params, nparams, "user.count", &count) < 0)
+        goto cleanup;
+    if (count != 1) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       "Expected '1' user, got '%u'", count);
+        goto cleanup;
+    }
+
+    getUserInfo(params, nparams, 0, &username, &domain, &logintime);
+    if (STRNEQ(username, "test")) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       "Expected user name 'test', got '%s'", username);
+        goto cleanup;
+    }
+    if (logintime != 1561739203584) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       "Expected login time of '1561739203584', got '%llu'",
+                       logintime);
+        goto cleanup;
+    }
+    if (STRNEQ(domain, "DOMAIN")) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       "Expected domain 'DOMAIN', got '%s'", domain);
+        goto cleanup;
+    }
+    ret = 0;
+
+ cleanup:
+    virTypedParamsFree(params, nparams);
+    qemuMonitorTestFree(test);
+    return ret;
+}
+
+
 static int
 mymain(void)
 {
@@ -931,6 +1098,7 @@ mymain(void)
     DO_TEST(CPU);
     DO_TEST(ArbitraryCommand);
     DO_TEST(GetInterfaces);
+    DO_TEST(Users);
 
     DO_TEST(Timeout); /* Timeout should always be called last */
 
-- 
2.21.0

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Re: [libvirt] [PATCH v3 3/9] qemu: add helper for getting guest users
Posted by Michal Privoznik 5 years, 3 months ago
On 8/23/19 6:31 PM, Jonathon Jongsma wrote:
> This function fetches the list of logged-in users from the qemu agent
> and adds them to a list of typed parameters so that they can be used
> internally in libvirt.
> 
> Also add some basic tests for the function.
> 
> Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
> ---
>   src/qemu/qemu_agent.c |  91 +++++++++++++++++++++++
>   src/qemu/qemu_agent.h |   2 +
>   tests/qemuagenttest.c | 168 ++++++++++++++++++++++++++++++++++++++++++
>   3 files changed, 261 insertions(+)
> 
> diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c
> index 361db299a5..963a4b9359 100644
> --- a/src/qemu/qemu_agent.c
> +++ b/src/qemu/qemu_agent.c
> @@ -2240,3 +2240,94 @@ qemuAgentSetUserPassword(qemuAgentPtr mon,
>       VIR_FREE(password64);
>       return ret;
>   }
> +
> +int
> +qemuAgentGetUsers(qemuAgentPtr mon,
> +                  virTypedParameterPtr *params,
> +                  int *nparams,
> +                  int *maxparams)
> +{
> +    int ret = -1;
> +    size_t i;
> +    virJSONValuePtr cmd;
> +    virJSONValuePtr reply = NULL;
> +    virJSONValuePtr data = NULL;

We can use VIR_AUTOPTR() and drop the explicit virJSONValueFree() calls 
at the cleanup label which then in turn gets needless as we can 'return 
-1' directly instead of 'goto cleanup'.

> +    size_t ndata;
> +    const char *strvalue;
> +
> +    if (!(cmd = qemuAgentMakeCommand("guest-get-users", NULL)))
> +        return -1;
> +
> +    if (qemuAgentCommand(mon, cmd, &reply, true,
> +                         VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK) < 0)
> +        goto cleanup;
> +
> +    if (!(data = virJSONValueObjectGetArray(reply, "return"))) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> +                       _("guest-get-users reply was missing return data"));
> +        goto cleanup;
> +    }
> +
> +    if (!virJSONValueIsArray(data)) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> +                       _("Malformed guest-get-users data array"));
> +        goto cleanup;
> +    }
> +
> +    ndata = virJSONValueArraySize(data);
> +
> +    if (virTypedParamsAddUInt(params, nparams, maxparams,
> +                              "user.count", ndata) < 0)
> +        goto cleanup;
> +
> +    for (i = 0; i < ndata; i++) {
> +        char param_name[VIR_TYPED_PARAM_FIELD_LENGTH];
> +        virJSONValuePtr entry = virJSONValueArrayGet(data, i);
> +
> +        if (!entry) {
> +            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> +                           _("array element missing in guest-get-users return "
> +                             "value"));
> +            goto cleanup;
> +        }
> +
> +        if (!(strvalue = virJSONValueObjectGetString(entry, "user"))) {
> +            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> +                           _("'user' missing in reply of guest-get-users"));
> +            goto cleanup;
> +        }
> +
> +        snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH, "user.%zu.name", i);
> +        if (virTypedParamsAddString(params, nparams, maxparams,
> +                                    param_name, strvalue) < 0)
> +            goto cleanup;
> +
> +        /* 'domain' is only present for windows guests */
> +        if ((strvalue = virJSONValueObjectGetString(entry, "domain"))) {
> +            snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> +                     "user.%zu.domain", i);
> +            if (virTypedParamsAddString(params, nparams, maxparams,
> +                                        param_name, strvalue) < 0)
> +                goto cleanup;
> +        }
> +
> +        double logintime;
> +        if (virJSONValueObjectGetNumberDouble(entry, "login-time", &logintime) < 0) {
> +            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> +                           _("'login-time' missing in reply of guest-get-users"));
> +            goto cleanup;
> +        }
> +        snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> +                 "user.%zu.login-time", i);
> +        if (virTypedParamsAddULLong(params, nparams, maxparams,
> +                                    param_name, logintime * 1000) < 0)
> +            goto cleanup;
> +    }
> +
> +    ret = ndata;
> +
> + cleanup:
> +    virJSONValueFree(cmd);
> +    virJSONValueFree(reply);
> +    return ret;
> +}
> diff --git a/src/qemu/qemu_agent.h b/src/qemu/qemu_agent.h
> index 6ae9fe54da..05621b521a 100644
> --- a/src/qemu/qemu_agent.h
> +++ b/src/qemu/qemu_agent.h
> @@ -120,3 +120,5 @@ int qemuAgentSetUserPassword(qemuAgentPtr mon,
>                                const char *user,
>                                const char *password,
>                                bool crypted);
> +
> +int qemuAgentGetUsers(qemuAgentPtr mon, virTypedParameterPtr *params, int *nparams, int *maxparams);

Very loooong line ;-)

> diff --git a/tests/qemuagenttest.c b/tests/qemuagenttest.c
> index 2f79986207..f2936a59f0 100644
> --- a/tests/qemuagenttest.c
> +++ b/tests/qemuagenttest.c
> @@ -902,6 +902,173 @@ testQemuAgentGetInterfaces(const void *data)
>       return ret;
>   }
>   
> +static const char testQemuAgentUsersResponse[] =
> +    "{\"return\": "
> +    "   ["
> +    "       {\"user\": \"test\","
> +    "        \"login-time\": 1561739203.584038"
> +    "       },"
> +    "       {\"user\": \"test2\","
> +    "        \"login-time\": 1561739229.190697"
> +    "       }"
> +    "   ]"
> +    "}";
> +
> +static const char testQemuAgentUsersResponse2[] =
> +    "{\"return\": "
> +    "   ["
> +    "       {\"user\": \"test\","
> +    "        \"domain\": \"DOMAIN\","
> +    "        \"login-time\": 1561739203.584038"
> +    "       }"
> +    "   ]"
> +    "}";
> +
> +static int getUserInfo(virTypedParameterPtr params, int nparams, size_t nth,
> +                       const char **username, const char **domain,
> +                       unsigned long long *logintime)
> +{
> +    char param_name[VIR_TYPED_PARAM_FIELD_LENGTH];
> +
> +    snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> +             "user.%zu.name", nth);
> +    if (username &&
> +        virTypedParamsGetString(params, nparams, param_name, username) < 0)
> +        return -1;
> +
> +    snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> +             "user.%zu.domain", nth);
> +    if (domain &&
> +        virTypedParamsGetString(params, nparams, param_name, domain) < 0)
> +        return -1;
> +
> +    snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> +             "user.%zu.login-time", nth);
> +    if (logintime &&
> +        virTypedParamsGetULLong(params, nparams, param_name, logintime) < 0)
> +        return -1;
> +
> +    return 0;

This function can be renamed to checkUserInfo() and it can check the 
values directly. It saves us couple of more lines.

> +}
> +

Michal

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Re: [libvirt] [PATCH v3 3/9] qemu: add helper for getting guest users
Posted by John Ferlan 5 years, 3 months ago
[...]

>> +
>> +static int getUserInfo(virTypedParameterPtr params, int nparams,
>> size_t nth,
>> +                       const char **username, const char **domain,
>> +                       unsigned long long *logintime)
>> +{
>> +    char param_name[VIR_TYPED_PARAM_FIELD_LENGTH];
>> +
>> +    snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
>> +             "user.%zu.name", nth);
>> +    if (username &&
>> +        virTypedParamsGetString(params, nparams, param_name,
>> username) < 0)
>> +        return -1;
>> +
>> +    snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
>> +             "user.%zu.domain", nth);
>> +    if (domain &&
>> +        virTypedParamsGetString(params, nparams, param_name, domain)
>> < 0)
>> +        return -1;
>> +
>> +    snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
>> +             "user.%zu.login-time", nth);
>> +    if (logintime &&
>> +        virTypedParamsGetULLong(params, nparams, param_name,
>> logintime) < 0)
>> +        return -1;
>> +
>> +    return 0;
> 
> This function can be renamed to checkUserInfo() and it can check the
> values directly. It saves us couple of more lines.
> 

Changes made to this function after review, but not posted AFAICT
neglected to check the return value of virTypedParamsGetString for
"user.%zu.domain" like the other two calls checked, so Coverity noted that.

John

>> +}
>> +
> 
> Michal
> 
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Re: [libvirt] [PATCH v3 3/9] qemu: add helper for getting guest users
Posted by Daniel Henrique Barboza 5 years, 3 months ago

On 8/23/19 1:31 PM, Jonathon Jongsma wrote:
> This function fetches the list of logged-in users from the qemu agent
> and adds them to a list of typed parameters so that they can be used
> internally in libvirt.
>
> Also add some basic tests for the function.
>
> Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>


Tested-by: Daniel Henrique Barboza <danielhb413@gmail.com>


And, assuming that what I mentioned in my comment below is a
matter of style rather than a syntax sin:


Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>


> ---
>   src/qemu/qemu_agent.c |  91 +++++++++++++++++++++++
>   src/qemu/qemu_agent.h |   2 +
>   tests/qemuagenttest.c | 168 ++++++++++++++++++++++++++++++++++++++++++
>   3 files changed, 261 insertions(+)
>
> diff --git a/src/qemu/qemu_agent.c b/src/qemu/qemu_agent.c
> index 361db299a5..963a4b9359 100644
> --- a/src/qemu/qemu_agent.c
> +++ b/src/qemu/qemu_agent.c
> @@ -2240,3 +2240,94 @@ qemuAgentSetUserPassword(qemuAgentPtr mon,
>       VIR_FREE(password64);
>       return ret;
>   }
> +
> +int
> +qemuAgentGetUsers(qemuAgentPtr mon,
> +                  virTypedParameterPtr *params,
> +                  int *nparams,
> +                  int *maxparams)
> +{
> +    int ret = -1;
> +    size_t i;
> +    virJSONValuePtr cmd;
> +    virJSONValuePtr reply = NULL;
> +    virJSONValuePtr data = NULL;
> +    size_t ndata;
> +    const char *strvalue;
> +
> +    if (!(cmd = qemuAgentMakeCommand("guest-get-users", NULL)))
> +        return -1;
> +
> +    if (qemuAgentCommand(mon, cmd, &reply, true,
> +                         VIR_DOMAIN_QEMU_AGENT_COMMAND_BLOCK) < 0)
> +        goto cleanup;
> +
> +    if (!(data = virJSONValueObjectGetArray(reply, "return"))) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> +                       _("guest-get-users reply was missing return data"));
> +        goto cleanup;
> +    }
> +
> +    if (!virJSONValueIsArray(data)) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> +                       _("Malformed guest-get-users data array"));
> +        goto cleanup;
> +    }
> +
> +    ndata = virJSONValueArraySize(data);
> +
> +    if (virTypedParamsAddUInt(params, nparams, maxparams,
> +                              "user.count", ndata) < 0)
> +        goto cleanup;
> +
> +    for (i = 0; i < ndata; i++) {
> +        char param_name[VIR_TYPED_PARAM_FIELD_LENGTH];
> +        virJSONValuePtr entry = virJSONValueArrayGet(data, i);
> +
> +        if (!entry) {
> +            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> +                           _("array element missing in guest-get-users return "
> +                             "value"));
> +            goto cleanup;
> +        }
> +
> +        if (!(strvalue = virJSONValueObjectGetString(entry, "user"))) {
> +            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> +                           _("'user' missing in reply of guest-get-users"));
> +            goto cleanup;
> +        }
> +
> +        snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH, "user.%zu.name", i);
> +        if (virTypedParamsAddString(params, nparams, maxparams,
> +                                    param_name, strvalue) < 0)
> +            goto cleanup;
> +
> +        /* 'domain' is only present for windows guests */
> +        if ((strvalue = virJSONValueObjectGetString(entry, "domain"))) {
> +            snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> +                     "user.%zu.domain", i);
> +            if (virTypedParamsAddString(params, nparams, maxparams,
> +                                        param_name, strvalue) < 0)
> +                goto cleanup;
> +        }
> +
> +        double logintime;

I'd rather declare 'logintime' at the start of the 'for' loop, together with
'param_name' and 'entry'. Since this patch passed 'make syntax-check' I
believe this is more a matter of "artistic freedom" than a rule, so I guess
it's ok.

> +        if (virJSONValueObjectGetNumberDouble(entry, "login-time", &logintime) < 0) {
> +            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
> +                           _("'login-time' missing in reply of guest-get-users"));
> +            goto cleanup;
> +        }
> +        snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> +                 "user.%zu.login-time", i);
> +        if (virTypedParamsAddULLong(params, nparams, maxparams,
> +                                    param_name, logintime * 1000) < 0)
> +            goto cleanup;
> +    }
> +
> +    ret = ndata;
> +
> + cleanup:
> +    virJSONValueFree(cmd);
> +    virJSONValueFree(reply);
> +    return ret;
> +}
> diff --git a/src/qemu/qemu_agent.h b/src/qemu/qemu_agent.h
> index 6ae9fe54da..05621b521a 100644
> --- a/src/qemu/qemu_agent.h
> +++ b/src/qemu/qemu_agent.h
> @@ -120,3 +120,5 @@ int qemuAgentSetUserPassword(qemuAgentPtr mon,
>                                const char *user,
>                                const char *password,
>                                bool crypted);
> +
> +int qemuAgentGetUsers(qemuAgentPtr mon, virTypedParameterPtr *params, int *nparams, int *maxparams);
> diff --git a/tests/qemuagenttest.c b/tests/qemuagenttest.c
> index 2f79986207..f2936a59f0 100644
> --- a/tests/qemuagenttest.c
> +++ b/tests/qemuagenttest.c
> @@ -902,6 +902,173 @@ testQemuAgentGetInterfaces(const void *data)
>       return ret;
>   }
>   
> +static const char testQemuAgentUsersResponse[] =
> +    "{\"return\": "
> +    "   ["
> +    "       {\"user\": \"test\","
> +    "        \"login-time\": 1561739203.584038"
> +    "       },"
> +    "       {\"user\": \"test2\","
> +    "        \"login-time\": 1561739229.190697"
> +    "       }"
> +    "   ]"
> +    "}";
> +
> +static const char testQemuAgentUsersResponse2[] =
> +    "{\"return\": "
> +    "   ["
> +    "       {\"user\": \"test\","
> +    "        \"domain\": \"DOMAIN\","
> +    "        \"login-time\": 1561739203.584038"
> +    "       }"
> +    "   ]"
> +    "}";
> +
> +static int getUserInfo(virTypedParameterPtr params, int nparams, size_t nth,
> +                       const char **username, const char **domain,
> +                       unsigned long long *logintime)
> +{
> +    char param_name[VIR_TYPED_PARAM_FIELD_LENGTH];
> +
> +    snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> +             "user.%zu.name", nth);
> +    if (username &&
> +        virTypedParamsGetString(params, nparams, param_name, username) < 0)
> +        return -1;
> +
> +    snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> +             "user.%zu.domain", nth);
> +    if (domain &&
> +        virTypedParamsGetString(params, nparams, param_name, domain) < 0)
> +        return -1;
> +
> +    snprintf(param_name, VIR_TYPED_PARAM_FIELD_LENGTH,
> +             "user.%zu.login-time", nth);
> +    if (logintime &&
> +        virTypedParamsGetULLong(params, nparams, param_name, logintime) < 0)
> +        return -1;
> +
> +    return 0;
> +}
> +
> +static int
> +testQemuAgentUsers(const void *data)
> +{
> +    virDomainXMLOptionPtr xmlopt = (virDomainXMLOptionPtr)data;
> +    qemuMonitorTestPtr test = qemuMonitorTestNewAgent(xmlopt);
> +    virTypedParameterPtr params = NULL;
> +    int nparams = 0;
> +    int maxparams = 0;
> +    int ret = -1;
> +    const char *username = NULL;
> +    const char *domain = NULL;
> +    unsigned long long logintime = 0;
> +    unsigned int count;
> +
> +    if (!test)
> +        return -1;
> +
> +    if (qemuMonitorTestAddAgentSyncResponse(test) < 0)
> +        goto cleanup;
> +
> +    if (qemuMonitorTestAddItem(test, "guest-get-users",
> +                               testQemuAgentUsersResponse) < 0)
> +        goto cleanup;
> +
> +    /* get users */
> +    if (qemuAgentGetUsers(qemuMonitorTestGetAgent(test),
> +                          &params, &nparams, &maxparams) < 0)
> +        goto cleanup;
> +
> +    if (virTypedParamsGetUInt(params, nparams, "user.count", &count) < 0)
> +        goto cleanup;
> +    if (count != 2) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR,
> +                       "Expected '2' users, got '%u'", count);
> +        goto cleanup;
> +    }
> +
> +    getUserInfo(params, nparams, 0, &username, NULL, &logintime);
> +    if (!username) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR, "%s", "Missing username");
> +        goto cleanup;
> +    }
> +    if (STRNEQ(username, "test")) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR,
> +                       "Expected user name 'test', got '%s'", username);
> +        goto cleanup;
> +    }
> +    if (logintime != 1561739203584) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR,
> +                       "Expected login time of '1561739203584', got '%llu'",
> +                       logintime);
> +        goto cleanup;
> +    }
> +
> +    getUserInfo(params, nparams, 1, &username, NULL, &logintime);
> +    if (STRNEQ(username, "test2")) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR,
> +                       "Expected user name 'test2', got '%s'", username);
> +        goto cleanup;
> +    }
> +    if (logintime != 1561739229190) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR,
> +                       "Expected login time of '1561739229190', got '%llu'",
> +                       logintime);
> +        goto cleanup;
> +    }
> +
> +    if (qemuMonitorTestAddAgentSyncResponse(test) < 0)
> +        goto cleanup;
> +
> +    if (qemuMonitorTestAddItem(test, "guest-get-users",
> +                               testQemuAgentUsersResponse2) < 0)
> +        goto cleanup;
> +
> +    virTypedParamsFree(params, nparams);
> +    params = NULL;
> +    nparams = 0;
> +    maxparams = 0;
> +
> +    /* get users with domain */
> +    if (qemuAgentGetUsers(qemuMonitorTestGetAgent(test),
> +                          &params, &nparams, &maxparams) < 0)
> +        goto cleanup;
> +
> +    if (virTypedParamsGetUInt(params, nparams, "user.count", &count) < 0)
> +        goto cleanup;
> +    if (count != 1) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR,
> +                       "Expected '1' user, got '%u'", count);
> +        goto cleanup;
> +    }
> +
> +    getUserInfo(params, nparams, 0, &username, &domain, &logintime);
> +    if (STRNEQ(username, "test")) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR,
> +                       "Expected user name 'test', got '%s'", username);
> +        goto cleanup;
> +    }
> +    if (logintime != 1561739203584) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR,
> +                       "Expected login time of '1561739203584', got '%llu'",
> +                       logintime);
> +        goto cleanup;
> +    }
> +    if (STRNEQ(domain, "DOMAIN")) {
> +        virReportError(VIR_ERR_INTERNAL_ERROR,
> +                       "Expected domain 'DOMAIN', got '%s'", domain);
> +        goto cleanup;
> +    }
> +    ret = 0;
> +
> + cleanup:
> +    virTypedParamsFree(params, nparams);
> +    qemuMonitorTestFree(test);
> +    return ret;
> +}
> +
> +
>   static int
>   mymain(void)
>   {
> @@ -931,6 +1098,7 @@ mymain(void)
>       DO_TEST(CPU);
>       DO_TEST(ArbitraryCommand);
>       DO_TEST(GetInterfaces);
> +    DO_TEST(Users);
>   
>       DO_TEST(Timeout); /* Timeout should always be called last */
>   

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