return 0;
}
+static int detect_vm_devicetree(const char **_id) {
+#if defined(__powerpc__) || defined(__powerpc64__)
+ _cleanup_free_ char *hvtype = NULL;
+ int r;
+
+ r = read_one_line_file("/sys/firmware/devicetree/base/hypervisor/compatible", &hvtype);
+ if (r >= 0) {
+ if (streq(hvtype, "linux,kvm")) {
+ *_id = "kvm";
+ return 1;
+ }
+ }
+#endif
+ return 0;
+}
+
static int detect_vm_dmi(const char **_id) {
/* Both CPUID and DMI are x86 specific interfaces... */
/* Returns a short identifier for the various VM implementations */
int detect_vm(const char **id) {
- _cleanup_free_ char *hvtype = NULL, *cpuinfo_contents = NULL;
+ _cleanup_free_ char *domcap = NULL, *cpuinfo_contents = NULL;
static thread_local int cached_found = -1;
static thread_local const char *cached_id = NULL;
const char *_id = NULL;
return cached_found;
}
- /* Try high-level hypervisor sysfs file first:
+ /* Try xen capabilities file first, if not found try high-level hypervisor sysfs file:
*
- * https://bugs.freedesktop.org/show_bug.cgi?id=61491 */
- r = read_one_line_file("/sys/hypervisor/type", &hvtype);
+ * https://bugs.freedesktop.org/show_bug.cgi?id=77271 */
+ r = read_one_line_file("/proc/xen/capabilities", &domcap);
if (r >= 0) {
- if (streq(hvtype, "xen")) {
+ char *cap, *i = domcap;
+
+ while ((cap = strsep(&i, ",")))
+ if (streq(cap, "control_d"))
+ break;
+
+ if (!cap) {
_id = "xen";
r = 1;
- goto finish;
}
- } else if (r != -ENOENT)
+
+ goto finish;
+
+ } else if (r == -ENOENT) {
+ _cleanup_free_ char *hvtype = NULL;
+
+ r = read_one_line_file("/sys/hypervisor/type", &hvtype);
+ if (r >= 0) {
+ if (streq(hvtype, "xen")) {
+ _id = "xen";
+ r = 1;
+ goto finish;
+ }
+ } else if (r != -ENOENT)
+ return r;
+ } else
return r;
/* this will set _id to "other" and return 0 for unknown hypervisors */
if (r != 0)
goto finish;
+ r = detect_vm_devicetree(&_id);
+ if (r != 0)
+ goto finish;
+
if (_id) {
/* "other" */
r = 1;
goto finish;
}
+#if defined(__s390__)
+ {
+ _cleanup_free_ char *t = NULL;
+
+ r = get_status_field("/proc/sysinfo", "VM00 Control Program:", &t);
+ if (r >= 0) {
+ if (streq(t, "z/VM"))
+ _id = "zvm";
+ else
+ _id = "kvm";
+ r = 1;
+
+ goto finish;
+ }
+ }
+#endif
+
r = 0;
finish:
r = read_one_line_file("/run/systemd/container", &m);
if (r == -ENOENT) {
- r = 0;
- goto finish;
+
+ /* Fallback for cases where PID 1 was not
+ * systemd (for example, cases where
+ * init=/bin/sh is used. */
+
+ r = getenv_for_pid(1, "container", &m);
+ if (r <= 0) {
+
+ /* If that didn't work, give up,
+ * assume no container manager.
+ *
+ * Note: This means we still cannot
+ * detect containers if init=/bin/sh
+ * is passed but privileges dropped,
+ * as /proc/1/environ is only readable
+ * with privileges. */
+
+ r = 0;
+ goto finish;
+ }
}
if (r < 0)
return r;
_id = "lxc-libvirt";
else if (streq(e, "systemd-nspawn"))
_id = "systemd-nspawn";
+ else if (streq(e, "docker"))
+ _id = "docker";
else
_id = "other";