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158 lines
4.3 KiB
158 lines
4.3 KiB
/*
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* Copyright (c) International Business Machines Corp., 2007
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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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* 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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* 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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* * Test Assertion.
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* *----------------
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* * kill -USR1 container_init
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* * - from the parent process and also inside a container
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* * - Where init has defined a custom handler for USR1
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* * - Should call the handler and
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* * - Verify whether the signal handler is called from the proper process.
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* *
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* * Description:
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* * Create PID namespace container.
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* * Container init defines the handler for SIGUSR1 and waits indefinetly.
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* * Parent sends SIGUSR1 to container init.
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* * The signal handler is handled and the cont-init resumes normally.
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* * From the container, again the signal SIGUSR1 is sent.
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* * In the sig-handler check if it's invoked from correct pid(parent/container)
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* * If cont-init wakes up properly -
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* * it will return expected value at exit which is verified at the end.
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* *
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* * History:
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* * DATE NAME DESCRIPTION
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* * 04/11/08 Veerendra C <vechandr@in.ibm.com> Verifying cont init kill -USR1
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*
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*******************************************************************************/
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#include "config.h"
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#define _GNU_SOURCE 1
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/wait.h>
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#include <sys/types.h>
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#include <signal.h>
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#include <unistd.h>
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#include "pidns_helper.h"
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#include "test.h"
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#define CHILD_PID 1
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#define PARENT_PID 0
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char *TCID = "pidns16";
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int TST_TOTAL = 3;
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void child_signal_handler(int sig, siginfo_t * si, void *unused)
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{
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static int c = 1;
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pid_t expected_pid;
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/* Verifying from which process the signal handler is signalled */
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switch (c) {
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case 1:
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expected_pid = PARENT_PID;
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break;
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case 2:
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expected_pid = CHILD_PID;
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break;
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default:
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tst_resm(TBROK, "child should NOT be signalled 3+ times");
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return;
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}
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if (si->si_pid == expected_pid)
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tst_resm(TPASS, "child is signalled from expected pid %d",
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expected_pid);
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else
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tst_resm(TFAIL, "child is signalled from unexpected pid %d,"
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" expecting pid %d", si->si_pid, expected_pid);
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c++;
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}
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/*
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* child_fn() - Inside container
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*/
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int child_fn(void *ttype)
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{
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struct sigaction sa;
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pid_t pid, ppid;
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/* Set process id and parent pid */
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pid = getpid();
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ppid = getppid();
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if ((pid != CHILD_PID) || (ppid != PARENT_PID))
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tst_resm(TBROK, "pidns is not created.");
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/* Set signal handler for SIGUSR1, also mask other signals */
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sa.sa_flags = SA_SIGINFO;
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sigemptyset(&sa.sa_mask);
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sa.sa_sigaction = child_signal_handler;
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if (sigaction(SIGUSR1, &sa, NULL) == -1)
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tst_resm(TBROK, "%d: sigaction() failed", pid);
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pause();
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tst_resm(TINFO, "Container: Resumed after receiving SIGUSR1 "
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"from parentNS ");
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if (kill(pid, SIGUSR1) != 0) {
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tst_resm(TFAIL, "kill(SIGUSR1) fails.");
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}
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tst_resm(TINFO, "Container: Resumed after sending SIGUSR1 "
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"from container itself");
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_exit(10);
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}
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static void setup(void)
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{
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tst_require_root();
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check_newpid();
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}
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/***********************************************************************
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* M A I N
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***********************************************************************/
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int main(int argc, char *argv[])
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{
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int status;
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pid_t cpid;
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setup();
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cpid = ltp_clone_quick(CLONE_NEWPID | SIGCHLD, child_fn, NULL);
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if (cpid < 0) {
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tst_resm(TBROK, "clone() failed.");
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}
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sleep(1);
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if (kill(cpid, SIGUSR1) != 0) {
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tst_resm(TFAIL, "kill(SIGUSR1) fails.");
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}
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sleep(1);
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if (waitpid(cpid, &status, 0) < 0)
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tst_resm(TWARN, "waitpid() failed.");
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if ((WIFEXITED(status)) && (WEXITSTATUS(status) == 10))
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tst_resm(TPASS, "container init continued successfuly, "
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"after handling signal -USR1");
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else
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tst_resm(TFAIL, "c-init failed to continue after "
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"passing kill -USR1");
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tst_exit();
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}
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