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/*
*
* Copyright (c) International Business Machines Corp., 2001
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* NAME
* times01.c
*
* DESCRIPTION
* Testcase to check the basic functionality of the times() system call.
*
* ALGORITHM
* This testcase checks the values that times(2) system call returns.
* Start a process, and spend some CPU time by performing a spin in
* a for-loop. Then use the times() system call, to determine the
* cpu time/sleep time, and other statistics.
*
* USAGE: <for command-line>
* times01 [-c n] [-f] [-P x] [-t]
* where, -c n : Run n copies concurrently.
* -f : Turn off functionality Testing.
* -P x : Pause for x seconds between iterations.
* -t : Turn on syscall timing.
*
* History
* 07/2001 John George
* -Ported
*
* Restrictions
* NONE
*/
#include <sys/types.h>
#include <sys/times.h>
#include <errno.h>
#include <sys/wait.h>
#include <test.h>
#include <usctest.h>
const char *TCID = "times01";
int TST_TOTAL = 1;
extern int Tst_count;
int exp_enos[]={0};
void setup(void);
void cleanup(void) __attribute__((noreturn));
int
main(int argc, char **argv)
{
const char *msg; /* message returned from parse_opts */
struct tms buf1, buf2;
time_t start_time, end_time;
int i, pid2, status, fail=0;
/* parse standard options */
if ((msg = parse_opts(argc, argv, (option_t *)NULL, NULL)) !=
(char *)NULL) {
tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
/*NOTREACHED*/
}
setup();
for (i = 0; i < 1000000; i++);
/*
* At least some CPU time must be used. This is
* achieved by executing the times(2) call for
* atleast 5 secs. This logic makes it independant
* of the processor speed.
*/
start_time = time(NULL);
for (;;) {
if (times(&buf1) == (clock_t)-1) {
TEST_ERROR_LOG(errno);
tst_resm(TFAIL, "Call to times(2) "
"failed, errno = %d", errno);
}
end_time = time(NULL);
if ((end_time - start_time) > 5) {
break;
}
}
if (times(&buf1) == (clock_t)-1) {
TEST_ERROR_LOG(errno);
tst_resm(TFAIL, "Call to times(2) failed, "
"errno = %d", errno);
} else {
/*
* Perform functional verification if test
* executed without (-f) option.
*/
if (STD_FUNCTIONAL_TEST) {
if (buf1.tms_utime == 0) {
tst_resm(TFAIL, "Error: times() report "
"0 user time");
fail=1;
}
if (buf1.tms_stime == 0) {
tst_resm(TFAIL, "Error: times() report "
"0 system time");
fail=1;
}
if (buf1.tms_cutime != 0) {
tst_resm(TFAIL, "Error: times() report "
"%d child user time",
buf1.tms_cutime);
fail=1;
}
if (buf1.tms_cstime != 0) {
tst_resm(TFAIL, "Error: times() report " "%d child system time",
buf1.tms_cstime);
fail=1;
}
pid2 = fork();
if (pid2 < 0) {
tst_brkm(TFAIL, cleanup, "Fork failed");
/*NOTREACHED*/
} else if (pid2 == 0) {
for (i = 0; i < 2000000; i++);
/*
* Atleast some CPU time must be used
* even in the child process (thereby
* making it independent of the
* processor speed). In fact the child
* uses twice as much CPU time.
*/
start_time = time(NULL);
for (;;) {
if (times(&buf2) == (clock_t)-1) {
tst_resm(TFAIL,
"Call to times "
"failed, "
"errno = %d",
errno);
exit(1);
}
end_time = time(NULL);
if ((end_time - start_time)
> 10) {
break;
}
}
exit(0);
}
waitpid(pid2, &status, 0);
if (WEXITSTATUS(status) != 0) {
tst_resm(TFAIL, "Call to times(2) "
"failed in child");
}
if (times(&buf2) == (clock_t)-1) {
TEST_ERROR_LOG(TEST_ERRNO);
tst_resm(TFAIL, "Call to times failed "
"errno = %d", errno);
fail=1;
}
if (buf1.tms_utime > buf2.tms_utime) {
tst_resm(TFAIL, "Error: parents's "
"user time(%d) before child "
"> parent's user time (%d) "
"after child",
buf1.tms_utime,
buf2.tms_utime);
fail=1;
}
if (buf2.tms_cutime == 0) {
tst_resm(TFAIL, "Error: times() "
"report %d child user "
"time should be > than "
"zero", buf2.tms_cutime);
fail=1;
}
if (buf2.tms_cstime == 0) {
tst_resm(TFAIL, "Error: times() "
"report %d child system time "
"should be > than zero",
buf2.tms_cstime);
fail=1;
}
if (fail == 0) {
tst_resm(TPASS, "%s: Functionality "
"test passed", TCID);
}
} else {
tst_resm(TPASS, "%s call succeeded", TCID);
}
}
cleanup();
/*NOTREACHED*/
}
/*
* setup()
* performs all ONE TIME setup for this test
*/
void
setup(void)
{
/* capture signals */
tst_sig(FORK, DEF_HANDLER, cleanup);
/* set the expected errnos... */
TEST_EXP_ENOS(exp_enos);
/* Pause if that option was specified
* TEST_PAUSE contains the code to fork the test with the -c option.
*/
TEST_PAUSE;
}
/*
* cleanup()
* performs all ONE TIME cleanup for this test at
* completion or premature exit
*/
void
cleanup(void)
{
/*
* print timing stats if that option was specified.
* print errno log if that option was specified.
*/
TEST_CLEANUP;
/* exit with return code appropriate for results */
tst_exit();
/*NOTREACHED*/
}
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