Merge remote branch 'cros/upstream' into master

client/tests/kvm/deps/test_clock_getres/test_clock_getres.c

+/*
+ *  Test clock resolution for KVM guests that have kvm-clock as clock source
+ *
+ *  Copyright (c) 2010 Red Hat, Inc
+ *  Author: Lucas Meneghel Rodrigues <lmr@redhat.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(void) {
+        struct timespec res;
+        int clock_return = clock_getres(CLOCK_MONOTONIC, &res);
+        char clocksource[50];
+        char line[80];
+        FILE *fr;
+        if ((fr = fopen(
+                        "/sys/devices/system/clocksource/clocksource0/current_clocksource",
+                        "rt")) == NULL) {
+                perror("fopen");
+                return EXIT_FAILURE;
+        }
+        while (fgets(line, 80, fr) != NULL) {
+                sscanf(line, "%s", &clocksource);
+        }
+        fclose(fr);
+        if (!strncmp(clocksource, "kvm-clock", strlen("kvm-clock"))) {
+                if (clock_return == 0) {
+                        if (res.tv_sec > 1 || res.tv_nsec > 100) {
+                                printf("FAIL: clock_getres returned bad clock resolution\n");
+                                return EXIT_FAILURE;
+                        } else {
+                                printf("PASS: check successful\n");
+                                return EXIT_SUCCESS;
+                        }
+                } else {
+                        printf("FAIL: clock_getres failed\n");
+                        return EXIT_FAILURE;
+                }
+        } else {
+                printf("FAIL: invalid clock source: %s\n", clocksource);
+                return EXIT_FAILURE;
+        }
+}