VMware: Store vmrun binary's path in the driver

Rather than looking up the path to vmrun each time we call it, look it
up once and save it. This sets up the ability for us to detect where the
path is on Mac OS X and not have to look it up each time we execute it.

src/vmware/vmware_conf.c

@@ -50,6 +50,7 @@ vmwareFreeDriver(struct vmware_driver *driver)
     virObjectUnref(driver->domains);
     virObjectUnref(driver->caps);
     virObjectUnref(driver->xmlopt);
+    VIR_FREE(driver->vmrun);
     VIR_FREE(driver);
 }
 
@@ -144,7 +145,7 @@ vmwareLoadDomains(struct vmware_driver *driver)
 
     ctx.parseFileName = vmwareCopyVMXFileName;
 
-    cmd = virCommandNewArgList(VMRUN, "-T",
+    cmd = virCommandNewArgList(driver->vmrun, "-T",
                                vmwareDriverTypeToString(driver->type),
                                "list", NULL);
     virCommandSetOutputBuffer(cmd, &outbuf);

src/vmware/vmware_conf.h

@@ -21,7 +21,6 @@
 #ifndef VMWARE_CONF_H
 # define VMWARE_CONF_H
 
-# define VMRUN "vmrun"
 # define NOGUI "nogui"
 
 # include "internal.h"
@@ -48,6 +47,7 @@ struct vmware_driver {
     virDomainObjListPtr domains;
     int version;
     int type;
+    char *vmrun;
 };
 
 typedef struct _vmwareDomain {

src/vmware/vmware_driver.c

@@ -35,6 +35,13 @@
 #include "vmware_driver.h"
 #include "virstring.h"
 
+/* Various places we may find the "vmrun" binary,
+ * without a leading / it will be searched in PATH
+ */
+static const char * const vmrun_candidates[] = {
+    "vmrun",
+};
+
 static void
 vmwareDriverLock(struct vmware_driver *driver)
 {
@@ -85,7 +92,7 @@ vmwareConnectOpen(virConnectPtr conn,
                   unsigned int flags)
 {
     struct vmware_driver *driver;
-    char * vmrun = NULL;
+    size_t i;
 
     virCheckFlags(VIR_CONNECT_RO, VIR_DRV_OPEN_ERROR);
 
@@ -114,19 +121,26 @@ vmwareConnectOpen(virConnectPtr conn,
     /* We now know the URI is definitely for this driver, so beyond
      * here, don't return DECLINED, always use ERROR */
 
-    vmrun = virFindFileInPath(VMRUN);
-
-    if (vmrun == NULL) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("%s utility is missing"), VMRUN);
-        return VIR_DRV_OPEN_ERROR;
-    } else {
-        VIR_FREE(vmrun);
-    }
-
     if (VIR_ALLOC(driver) < 0)
         return VIR_DRV_OPEN_ERROR;
 
+    /* Find vmrun, which is what this driver uses to communicate to
+     * the VMware hypervisor. We look this up first since we use it
+     * for auto detection of the backend
+     */
+    for (i = 0; i < ARRAY_CARDINALITY(vmrun_candidates); i++) {
+        driver->vmrun = virFindFileInPath(vmrun_candidates[i]);
+        /* If we found one, we can stop looking */
+        if (driver->vmrun)
+            break;
+    }
+
+    if (driver->vmrun == NULL) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("vmrun utility is missing"));
+        goto cleanup;
+    }
+
     if (virMutexInit(&driver->lock) < 0)
         goto cleanup;
 
@@ -200,7 +214,7 @@ vmwareUpdateVMStatus(struct vmware_driver *driver, virDomainObjPtr vm)
     int newState;
     int ret = -1;
 
-    cmd = virCommandNewArgList(VMRUN, "-T",
+    cmd = virCommandNewArgList(driver->vmrun, "-T",
                                vmwareDriverTypeToString(driver->type),
                                "list", NULL);
     virCommandSetOutputBuffer(cmd, &outbuf);
@@ -251,7 +265,7 @@ vmwareStopVM(struct vmware_driver *driver,
              virDomainShutoffReason reason)
 {
     const char *cmd[] = {
-        VMRUN, "-T", PROGRAM_SENTINEL, "stop",
+        driver->vmrun, "-T", PROGRAM_SENTINEL, "stop",
         PROGRAM_SENTINEL, "soft", NULL
     };
 
@@ -272,7 +286,7 @@ static int
 vmwareStartVM(struct vmware_driver *driver, virDomainObjPtr vm)
 {
     const char *cmd[] = {
-        VMRUN, "-T", PROGRAM_SENTINEL, "start",
+        driver->vmrun, "-T", PROGRAM_SENTINEL, "start",
         PROGRAM_SENTINEL, PROGRAM_SENTINEL, NULL
     };
     const char *vmxPath = ((vmwareDomainPtr) vm->privateData)->vmxPath;
@@ -445,7 +459,7 @@ vmwareDomainSuspend(virDomainPtr dom)
 
     virDomainObjPtr vm;
     const char *cmd[] = {
-      VMRUN, "-T", PROGRAM_SENTINEL, "pause",
+      driver->vmrun, "-T", PROGRAM_SENTINEL, "pause",
       PROGRAM_SENTINEL, NULL
     };
     int ret = -1;
@@ -494,7 +508,7 @@ vmwareDomainResume(virDomainPtr dom)
 
     virDomainObjPtr vm;
     const char *cmd[] = {
-        VMRUN, "-T", PROGRAM_SENTINEL, "unpause", PROGRAM_SENTINEL,
+        driver->vmrun, "-T", PROGRAM_SENTINEL, "unpause", PROGRAM_SENTINEL,
         NULL
     };
     int ret = -1;
@@ -543,7 +557,7 @@ vmwareDomainReboot(virDomainPtr dom, unsigned int flags)
     const char * vmxPath = NULL;
     virDomainObjPtr vm;
     const char *cmd[] = {
-        VMRUN, "-T", PROGRAM_SENTINEL,
+        driver->vmrun, "-T", PROGRAM_SENTINEL,
         "reset", PROGRAM_SENTINEL, "soft", NULL
     };
     int ret = -1;