168 lines
3.7 KiB
C
168 lines
3.7 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* NAME
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* waitpid02.c
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*
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* DESCRIPTION
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* Check that when a child gets killed by an integer zero
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* divide exception, the waiting parent is correctly notified.
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*
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* ALGORITHM
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* Fork a child and send a SIGFPE to it. The parent waits for the
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* death of the child and checks that SIGFPE was returned.
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*
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* USAGE: <for command-line>
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* waitpid02 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
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* where, -c n : Run n copies concurrently.
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* -e : Turn on errno logging.
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* -i n : Execute test n times.
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* -I x : Execute test for x seconds.
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* -P x : Pause for x seconds between iterations.
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* -t : Turn on syscall timing.
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*
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* History
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* 07/2001 John George
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* -Ported
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* 10/2002 Paul Larson
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* Div by zero doesn't cause SIGFPE on some archs, fixed
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* to send the signal with kill
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*
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* Restrictions
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* None
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*/
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#include <sys/file.h>
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#include <sys/resource.h>
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#include <sys/signal.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include "test.h"
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static void do_child(void);
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static void setup(void);
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char *TCID = "waitpid02";
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int TST_TOTAL = 1;
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int main(int argc, char **argv)
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{
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int lc;
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int pid, npid, sig, nsig;
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int nexno, status;
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tst_parse_opts(argc, argv, NULL, NULL);
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#ifdef UCLINUX
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maybe_run_child(&do_child, "");
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#endif
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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tst_count = 0;
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sig = SIGFPE;
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pid = FORK_OR_VFORK();
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if (pid < 0)
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tst_brkm(TBROK|TERRNO, NULL, "fork failed");
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if (pid == 0) {
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#ifdef UCLINUX
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self_exec(argv[0], "");
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/* No fork() error check is done so don't check here */
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#else
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do_child();
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#endif
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} else {
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kill(pid, sig);
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errno = 0;
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while (((npid = waitpid(pid, &status, 0)) != -1) ||
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(errno == EINTR)) {
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if (errno == EINTR)
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continue;
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if (npid != pid) {
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tst_resm(TFAIL, "waitpid error: "
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"unexpected pid returned");
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} else {
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tst_resm(TPASS,
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"received expected pid");
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}
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nsig = WTERMSIG(status);
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/*
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* nsig is the signal number returned by
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* waitpid
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*/
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if (nsig != sig) {
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tst_resm(TFAIL, "waitpid error: "
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"unexpected signal returned");
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} else {
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tst_resm(TPASS, "received expected "
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"signal");
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}
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/*
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* nexno is the exit number returned by
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* waitpid
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*/
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nexno = WEXITSTATUS(status);
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if (nexno != 0) {
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tst_resm(TFAIL, "signal error: "
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"unexpected exit number "
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"returned");
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} else {
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tst_resm(TPASS, "received expected "
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"exit value");
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}
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}
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}
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}
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tst_exit();
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}
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static void do_child(void)
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{
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int exno = 1;
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while (1)
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usleep(10);
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exit(exno);
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}
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static void setup(void)
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{
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/* SIGFPE is expected signal, so avoid creating any corefile.
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* '1' is a special value, that will also avoid dumping via pipe. */
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struct rlimit r;
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r.rlim_cur = 1;
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r.rlim_max = 1;
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setrlimit(RLIMIT_CORE, &r);
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TEST_PAUSE;
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}
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