src/tests/reboot.c

	reboot.c revision d028235de9ec7664e1c2c904c541a447a768997a
a8c5a86d183db25a57bf193c06b41e092ec2e151Timo Sirainen/*
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen * Copyright © 2012 Serge Hallyn <serge.hallyn@ubuntu.com>.
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen * Copyright © 2012 Canonical Ltd.
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen *
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen * This program is free software; you can redistribute it and/or
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen * modify it under the terms of the GNU Lesser General Public
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen * License as published by the Free Software Foundation; either
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen * version 2.1 of the License, or (at your option) any later version.
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen *
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen * This library is distributed in the hope that it will be useful,
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen * but WITHOUT ANY WARRANTY; without even the implied warranty of
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
a10ed8c47534b4c6b6bf2711ccfe577e720a47b4Timo Sirainen * Lesser General Public License for more details.
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen *
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen * You should have received a copy of the GNU Lesser General Public
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen * License along with this library; if not, write to the Free Software
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen */
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen#include <alloca.h>
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen#include <stdio.h>
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen#include <sched.h>
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen#include <unistd.h>
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen#include <signal.h>
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen#include <sys/reboot.h>
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen#include <sys/types.h>
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen#include <sys/wait.h>
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen#include "lxc/namespace.h"
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen#include <sched.h>
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen#include <linux/sched.h>
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen#include <linux/reboot.h>
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainenint clone(int (*fn)(void *), void *child_stack, int flags, void *arg, ...);
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainenstatic int do_reboot(void *arg)
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen{
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    int *cmd = arg;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (reboot(*cmd))
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        printf("failed to reboot(%d): %m\n", *cmd);
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    return 0;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen}
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainenstatic int test_reboot(int cmd, int sig)
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen{
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    long stack_size = 4096;
a10ed8c47534b4c6b6bf2711ccfe577e720a47b4Timo Sirainen    void *stack = alloca(stack_size) + stack_size;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    int status;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    pid_t ret;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    ret = clone(do_reboot, stack, CLONE_NEWPID | SIGCHLD, &cmd);
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (ret < 0) {
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        printf("failed to clone: %m\n");
e34d170f8f0e084bd94bfbc1a7085ece67e508dfTimo Sirainen        return -1;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    }
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (wait(&status) < 0) {
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        printf("unexpected wait error: %m\n");
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        return -1;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    }
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (!WIFSIGNALED(status)) {
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        if (sig != -1)
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen            printf("child process exited but was not signaled\n");
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        return -1;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    }
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (WTERMSIG(status) != sig) {
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        printf("signal termination is not the one expected\n");
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        return -1;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    }
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    return 0;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen}
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainenstatic int have_reboot_patch(void)
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen{
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    FILE *f = fopen("/proc/sys/kernel/ctrl-alt-del", "r");
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    int ret;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    int v;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (!f)
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        return 0;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    ret = fscanf(f, "%d", &v);
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    fclose(f);
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (ret != 1)
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        return 0;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    ret = reboot(v ? LINUX_REBOOT_CMD_CAD_ON : LINUX_REBOOT_CMD_CAD_OFF);
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (ret != -1)
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        return 0;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    return 1;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen}
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainenint main(int argc, char *argv[])
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen{
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    int status;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (getuid() != 0) {
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        printf("Must run as root.\n");
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        return 1;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    }
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    status = have_reboot_patch();
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (status != 0) {
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        printf("Your kernel does not have the container reboot patch\n");
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        return 1;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    }
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    status = test_reboot(LINUX_REBOOT_CMD_CAD_ON, -1);
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (status >= 0) {
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        printf("reboot(LINUX_REBOOT_CMD_CAD_ON) should have failed\n");
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        return 1;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    }
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    printf("reboot(LINUX_REBOOT_CMD_CAD_ON) has failed as expected\n");
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    status = test_reboot(LINUX_REBOOT_CMD_RESTART, SIGHUP);
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (status < 0)
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        return 1;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    printf("reboot(LINUX_REBOOT_CMD_RESTART) succeed\n");
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    status = test_reboot(LINUX_REBOOT_CMD_RESTART2, SIGHUP);
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (status < 0)
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        return 1;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    printf("reboot(LINUX_REBOOT_CMD_RESTART2) succeed\n");
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    status = test_reboot(LINUX_REBOOT_CMD_HALT, SIGINT);
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (status < 0)
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        return 1;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    printf("reboot(LINUX_REBOOT_CMD_HALT) succeed\n");
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    status = test_reboot(LINUX_REBOOT_CMD_POWER_OFF, SIGINT);
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    if (status < 0)
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen        return 1;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    printf("reboot(LINUX_REBOOT_CMD_POWERR_OFF) succeed\n");
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    printf("All tests passed\n");
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen    return 0;
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen}
5806683c1c3f5b1997e92a023c0fe39912d4df5dTimo Sirainen