[libvirt] [PATCH] test_driver: implement virDomainSendProcessSignal

[Ilias Stamatis]

Only succeed when @pid_value is 1, since according to the docs this is
the minimum requirement for any driver to implement this API.

>From man 2 kill:
The only signals that can be sent to process ID 1, the init process, are
those for which init has explicitly installed signal handlers.

Regarding sending SIGTERM and SIGKILL to init, the test driver domains
pretend to run Linux, and on Linux init/systemd explicitly ignores these
signals.

Correspondingly, we can assume that no signal handlers are installed for
any other signal and succeed by doing nothing.

Signed-off-by: Ilias Stamatis <stamatis.iliass at gmail.com>
---

Alternatively, we could succeed when @pid_value is any number or belongs
to a set of specific numbers.

 src/test/test_driver.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 mode change 100644 => 100755 src/test/test_driver.c

diff --git a/src/test/test_driver.c b/src/test/test_driver.c
old mode 100644
new mode 100755
index cae2521b21..490a605a77
--- a/src/test/test_driver.c
+++ b/src/test/test_driver.c
@@ -2825,6 +2825,40 @@ static int testDomainSetMetadata(virDomainPtr dom,
     return ret;
 }

+static int
+testDomainSendProcessSignal(virDomainPtr dom,
+                            long long pid_value,
+                            unsigned int signum,
+                            unsigned int flags)
+{
+    int ret = -1;
+    virDomainObjPtr vm = NULL;
+
+    virCheckFlags(0, -1);
+
+    if (pid_value != 1) {
+        virReportError(VIR_ERR_INVALID_ARG,
+                       _("only sending a signal to pid 1 is supported"));
+        return -1;
+    }
+
+    if (signum >= VIR_DOMAIN_PROCESS_SIGNAL_LAST) {
+        virReportError(VIR_ERR_INVALID_ARG,
+                       _("signum value %d is out of range"),
+                       signum);
+        return -1;
+    }
+
+    if (!(vm = testDomObjFromDomain(dom)))
+        goto cleanup;
+
+    /* do nothing */
+    ret = 0;
+
+ cleanup:
+    virDomainObjEndAPI(&vm);
+    return ret;
+}

 static int testNodeGetCellsFreeMemory(virConnectPtr conn,
                                       unsigned long long *freemems,
@@ -7027,6 +7061,7 @@ static virHypervisorDriver testHypervisorDriver = {
     .domainScreenshot = testDomainScreenshot, /* 1.0.5 */
     .domainGetMetadata = testDomainGetMetadata, /* 1.1.3 */
     .domainSetMetadata = testDomainSetMetadata, /* 1.1.3 */
+    .domainSendProcessSignal = testDomainSendProcessSignal, /* 5.5.0 */
     .connectGetCPUModelNames = testConnectGetCPUModelNames, /* 1.1.3 */
     .domainManagedSave = testDomainManagedSave, /* 1.1.4 */
     .domainHasManagedSaveImage = testDomainHasManagedSaveImage, /* 1.1.4 */
--
2.21.0