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Diffstat (limited to 'winsup/testsuite/winsup.api/ltp/times03.c')
| -rw-r--r-- | winsup/testsuite/winsup.api/ltp/times03.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/winsup/testsuite/winsup.api/ltp/times03.c b/winsup/testsuite/winsup.api/ltp/times03.c new file mode 100644 index 000000000..a388c77f7 --- /dev/null +++ b/winsup/testsuite/winsup.api/ltp/times03.c @@ -0,0 +1,246 @@ +/* + * + * 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> + +char *TCID = "times01"; +int TST_TOTAL = 1; +extern int Tst_count; +int exp_enos[]={0}; + +void setup(void); +void cleanup(void); + +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, pid1, 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) == -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) == -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) == -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) == -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*/ +} |