* Makefile.am: extended make tests to run those in docs/examples

* docs/examples/suspend.c docs/examples/*: added an example of suspend/resume and regenerated Daniel
2025-02-25 18:55:26 -06:00 · 2006-02-21 14:15:32 +00:00
parent d3a15eb303
commit c509b5cd0b
6 changed files with 190 additions and 3 deletions
--- a/docs/examples/suspend.c
+++ b/docs/examples/suspend.c
@@ -0,0 +1,134 @@
+/**
+ * section: Scheduling
+ * synopsis: Suspend a domain and then resume its execution
+ * purpose: Demonstrate the basic use of the library to suspend and
+ *          resume a domain. If no id is given on the command line
+ *          this script will suspend and resume the first domain found
+ *          which is not Domain 0.
+ * usage: suspend [id]
+ * test: suspend
+ * author: Daniel Veillard
+ * copy: see Copyright for the status of this software.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <libvirt.h>
+
+virConnectPtr conn = NULL; /* the hypervisor connection */
+
+/**
+ * checkDomainState:
+ * @dom: the domain
+ *
+ * Return the current state of a domain or -1 if non-exsitant
+ */
+static int
+checkDomainState(virDomainPtr dom) {
+    virDomainInfo info;        /* the informations being fetched */
+    int ret;
+    
+    ret = virDomainGetInfo(dom, &info);
+    if (ret < 0) {
+	return(-1);
+    }
+    return(info.state);
+}
+
+/**
+ * SuspendAndResumeDomain:
+ * @id: the id of the domain
+ *
+ * extract the domain 0 informations
+ */
+static void
+SuspendAndResumeDomain(int id) {
+    virDomainPtr dom = NULL;   /* the domain being checked */
+    int ret, state;
+
+    /* Find the domain of the given id */
+    dom = virDomainLookupByID(conn, id);
+    if (dom == NULL) {
+        fprintf(stderr, "Failed to find Domain %d\n", id);
+	goto error;
+    }
+
+    /* Check state */
+    state = checkDomainState(dom);
+    if ((state == VIR_DOMAIN_RUNNING) ||
+        (state == VIR_DOMAIN_NOSTATE) ||
+	(state == VIR_DOMAIN_BLOCKED)) {
+	printf("Suspending domain...\n");
+	ret = virDomainSuspend(dom);
+	if (ret < 0) {
+	    fprintf(stderr, "Failed to suspend Domain %d\n", id);
+	    goto error;
+	}
+	state = checkDomainState(dom);
+	if (state != VIR_DOMAIN_PAUSED) {
+	    fprintf(stderr, "Domain %d state is not suspended\n", id);
+	} else {
+	    printf("Domain suspended, resuming it...\n");
+	}
+	ret = virDomainResume(dom);
+	if (ret < 0) {
+	    fprintf(stderr, "Failed to resume Domain %d\n", id);
+	    goto error;
+	}
+	state = checkDomainState(dom);
+	if ((state == VIR_DOMAIN_RUNNING) ||
+	    (state == VIR_DOMAIN_NOSTATE) ||
+	    (state == VIR_DOMAIN_BLOCKED)) {
+	    printf("Domain resumed\n");
+	} else {
+	    fprintf(stderr, "Domain %d state indicate it is not resumed\n", id);
+	}
+    } else {
+        fprintf(stderr, "Domain %d is not in a state where it should be suspended\n", id);
+	goto error;
+    }
+
+error:
+    if (dom != NULL)
+        virDomainFree(dom);
+}
+
+int main(int argc, char **argv) {
+    int id = 0;
+
+    /* NULL means connect to local Xen hypervisor */
+    conn = virConnectOpenReadOnly(NULL);
+    if (conn == NULL) {
+        fprintf(stderr, "Failed to connect to hypervisor\n");
+	goto error;
+    }
+
+    if (argc > 1) {
+        id = atoi(argv[1]);
+    }
+    if (id == 0) {
+        int i, j, ids[10];
+	i = virConnectListDomains(conn, &ids[0], 10);
+	if (i < 0) {
+	    fprintf(stderr, "Failed to list the domains\n");
+	    goto error;
+	}
+	for (j = 0;j < i;j++) {
+	    if (ids[j] != 0) {
+	        id = ids[j];
+		break;
+	    }
+	}
+    }
+    if (id == 0) {
+	fprintf(stderr, "Failed find a running guest domain\n");
+	goto error;
+    }
+    
+    SuspendAndResumeDomain(id);
+
+error:
+    if (conn != NULL)
+	virConnectClose(conn);
+    return(0);
+}