mirror of
https://github.com/openvswitch/ovs
synced 2025-10-17 14:28:02 +00:00
131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
/*
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* Copyright (c) 2009, 2010 Nicira Networks.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include "timeval.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "command-line.h"
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#include "daemon.h"
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#include "util.h"
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#undef NDEBUG
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#include <assert.h>
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static long long int
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gettimeofday_in_msec(void)
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{
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struct timeval tv;
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assert(!gettimeofday(&tv, NULL));
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return timeval_to_msec(&tv);
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}
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static void
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do_test(void)
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{
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/* Wait until we are awakened by a signal (typically EINTR due to the
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* setitimer()). Then ensure that, if time has really advanced by
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* TIME_UPDATE_INTERVAL, then time_msec() reports that it advanced.
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*/
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long long int start_time_msec;
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long long int start_gtod;
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start_time_msec = time_msec();
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start_gtod = gettimeofday_in_msec();
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for (;;) {
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/* Wait up to 1 second. Using select() to do the timeout avoids
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* interfering with the interval timer. */
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struct timeval timeout;
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int retval;
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timeout.tv_sec = 1;
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timeout.tv_usec = 0;
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retval = select(0, NULL, NULL, NULL, &timeout);
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if (retval != -1) {
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ovs_fatal(0, "select returned %d", retval);
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} else if (errno != EINTR) {
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ovs_fatal(errno, "select reported unexpected error");
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}
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if (gettimeofday_in_msec() - start_gtod >= TIME_UPDATE_INTERVAL) {
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assert(time_msec() - start_time_msec >= TIME_UPDATE_INTERVAL);
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break;
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}
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}
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}
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static void
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usage(void)
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{
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ovs_fatal(0, "usage: %s TEST, where TEST is \"plain\" or \"daemon\"",
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program_name);
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}
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int
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main(int argc, char *argv[])
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{
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proctitle_init(argc, argv);
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set_program_name(argv[0]);
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time_init();
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if (argc != 2) {
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usage();
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} else if (!strcmp(argv[1], "plain")) {
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do_test();
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} else if (!strcmp(argv[1], "daemon")) {
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/* Test that time still advances even in a daemon. This is an
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* interesting test because fork() cancels the interval timer. */
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char cwd[1024], *pidfile;
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FILE *success;
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assert(getcwd(cwd, sizeof cwd) == cwd);
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unlink("test-timeval.success");
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/* Daemonize, with a pidfile in the current directory. */
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set_detach();
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pidfile = xasprintf("%s/test-timeval.pid", cwd);
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set_pidfile(pidfile);
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free(pidfile);
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set_no_chdir();
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daemonize();
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/* Run the test. */
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do_test();
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/* Report success by writing out a file, since the ultimate invoker of
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* test-timeval can't wait on the daemonized process. */
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success = fopen("test-timeval.success", "w");
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if (!success) {
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ovs_fatal(errno, "test-timeval.success: create failed");
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}
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fprintf(success, "success\n");
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fclose(success);
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} else {
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usage();
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}
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return 0;
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}
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