--- /dev/null
+/**
+ * @file utime.c
+ *
+ * @author Thomas Jahns, Deutsches Klimarechenzentrum
+ *
+ * @section LICENSE
+ * Copyright 2012 - 2014
+ *
+ * Mathis Rosenhauer, Luis Kornblueh
+ * Moritz Hanke,
+ * Joerg Behrens,
+ * Thomas Jahns
+ *
+ * Deutsches Klimarechenzentrum GmbH Max-Planck-Institut fuer Meteorologie
+ * Bundesstr. 45a Bundesstr. 53
+ * 20146 Hamburg 20146 Hamburg
+ * Germany Germany
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @section DESCRIPTION
+ *
+ * Simple timing command, since calling time(1) gives non-portable results.
+ *
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/resource.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+static int
+run_cmd(int argc, char *argv[]);
+
+int main(int argc, char **argv)
+{
+ struct timeval utime = { .tv_sec = 0, .tv_usec = 0 };
+ int status, rstatus;
+ if (argc > 1 && ((status = run_cmd(argc - 1, argv + 1)) >= 0))
+ {
+ struct rusage usage;
+ if ((rstatus = getrusage(RUSAGE_CHILDREN, &usage) == -1))
+ {
+ perror("resource usage statistics unavailable");
+ }
+ else if (rstatus != 0)
+ {
+ fputs("an unknown error occurred\n", stderr);
+ return EXIT_FAILURE;
+ }
+ else
+ {
+ utime = usage.ru_utime;
+ }
+ }
+ else if (status)
+ {
+ fputs("could not fork child\n", stderr);
+ return EXIT_FAILURE;
+ }
+ fprintf(stderr, "%f\n", (utime.tv_sec * 1000000 + utime.tv_usec)/1000000.0);
+ return status;
+}
+
+static int
+run_cmd(int argc, char *argv[])
+{
+ int status;
+ pid_t child_pid;
+ if (argc < 1)
+ return -1;
+ if ((child_pid = fork()) < 0)
+ status = -1;
+ else if (child_pid == 0)
+ {
+ /* child */
+ execvp(argv[0], argv);
+ _exit(127); /* execvp should not have returned */
+ }
+ else
+ {
+ while (waitpid(child_pid, &status, 0) < 0)
+ if (errno != EINTR)
+ {
+ status = -1;
+ break;
+ }
+ }
+ return status;
+}
+