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Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
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Christian Brauner
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Feb 19, 2019
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/* liblxcapi | ||
* | ||
* Copyright © 2019 Christian Brauner <christian.brauner@ubuntu.com>. | ||
* Copyright © 2019 Canonical Ltd. | ||
* | ||
* This program is free software; you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License version 2, as | ||
* published by the Free Software Foundation. | ||
* | ||
* 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., | ||
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
*/ | ||
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#ifndef _GNU_SOURCE | ||
#define _GNU_SOURCE 1 | ||
#endif | ||
#include <errno.h> | ||
#include <fcntl.h> | ||
#include <lxc/lxccontainer.h> | ||
#include <signal.h> | ||
#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <string.h> | ||
#include <sys/types.h> | ||
#include <sys/wait.h> | ||
#include <unistd.h> | ||
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#include "lxctest.h" | ||
#include "utils.h" | ||
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#define MYNAME "shortlived" | ||
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static int destroy_container(void) | ||
{ | ||
int status, ret; | ||
pid_t pid = fork(); | ||
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if (pid < 0) { | ||
perror("fork"); | ||
return -1; | ||
} | ||
if (pid == 0) { | ||
execlp("lxc-destroy", "lxc-destroy", "-f", "-n", MYNAME, NULL); | ||
exit(EXIT_FAILURE); | ||
} | ||
again: | ||
ret = waitpid(pid, &status, 0); | ||
if (ret == -1) { | ||
if (errno == EINTR) | ||
goto again; | ||
perror("waitpid"); | ||
return -1; | ||
} | ||
if (ret != pid) | ||
goto again; | ||
if (!WIFEXITED(status)) { // did not exit normally | ||
fprintf(stderr, "%d: lxc-create exited abnormally\n", __LINE__); | ||
return -1; | ||
} | ||
return WEXITSTATUS(status); | ||
} | ||
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static int create_container(void) | ||
{ | ||
int status, ret; | ||
pid_t pid = fork(); | ||
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if (pid < 0) { | ||
perror("fork"); | ||
return -1; | ||
} | ||
if (pid == 0) { | ||
execlp("lxc-create", "lxc-create", "-t", "busybox", "-n", MYNAME, NULL); | ||
exit(EXIT_FAILURE); | ||
} | ||
again: | ||
ret = waitpid(pid, &status, 0); | ||
if (ret == -1) { | ||
if (errno == EINTR) | ||
goto again; | ||
perror("waitpid"); | ||
return -1; | ||
} | ||
if (ret != pid) | ||
goto again; | ||
if (!WIFEXITED(status)) { // did not exit normally | ||
fprintf(stderr, "%d: lxc-create exited abnormally\n", __LINE__); | ||
return -1; | ||
} | ||
return WEXITSTATUS(status); | ||
} | ||
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int main(int argc, char *argv[]) | ||
{ | ||
int i; | ||
const char *s; | ||
bool b; | ||
struct lxc_container *c; | ||
int ret = EXIT_FAILURE; | ||
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/* test a real container */ | ||
c = lxc_container_new(MYNAME, NULL); | ||
if (!c) { | ||
fprintf(stderr, "%d: error creating lxc_container %s\n", __LINE__, MYNAME); | ||
goto out; | ||
} | ||
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if (c->is_defined(c)) { | ||
fprintf(stderr, "%d: %s thought it was defined\n", __LINE__, MYNAME); | ||
goto out; | ||
} | ||
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if (create_container() < 0) { | ||
fprintf(stderr, "%d: failed to create a container\n", __LINE__); | ||
goto out; | ||
} | ||
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b = c->is_defined(c); | ||
if (!b) { | ||
fprintf(stderr, "%d: %s thought it was not defined\n", __LINE__, MYNAME); | ||
goto out; | ||
} | ||
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s = c->state(c); | ||
if (!s || strcmp(s, "STOPPED")) { | ||
fprintf(stderr, "%d: %s is in state %s, not in STOPPED.\n", __LINE__, c->name, s ? s : "undefined"); | ||
goto out; | ||
} | ||
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b = c->load_config(c, NULL); | ||
if (!b) { | ||
fprintf(stderr, "%d: %s failed to read its config\n", __LINE__, c->name); | ||
goto out; | ||
} | ||
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if (!c->set_config_item(c, "lxc.init.cmd", "echo hello")) { | ||
fprintf(stderr, "%d: failed setting lxc.init.cmd\n", __LINE__); | ||
goto out; | ||
} | ||
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c->want_daemonize(c, true); | ||
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if (setenv("LXC_MEMFD_REXEC", "1", 1)) { | ||
fprintf(stderr, "%d: failed to set LXC_MEMFD_REXEC evironment variable\n", __LINE__); | ||
goto out; | ||
} | ||
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/* Test whether we can start a really short-lived daemonized container. */ | ||
for (i = 0; i < 10; i++) { | ||
if (!c->startl(c, 0, NULL)) { | ||
fprintf(stderr, "%d: %s failed to start on %dth iteration\n", __LINE__, c->name, i); | ||
goto out; | ||
} | ||
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if (!c->wait(c, "STOPPED", 30)) { | ||
fprintf(stderr, "%d: %s failed to wait on %dth iteration\n", __LINE__, c->name, i); | ||
goto out; | ||
} | ||
} | ||
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/* Test whether we can start a really short-lived daemonized container with lxc-init. */ | ||
for (i = 0; i < 10; i++) { | ||
if (!c->startl(c, 1, NULL)) { | ||
fprintf(stderr, "%d: %s failed to start on %dth iteration\n", __LINE__, c->name, i); | ||
goto out; | ||
} | ||
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if (!c->wait(c, "STOPPED", 30)) { | ||
fprintf(stderr, "%d: %s failed to wait on %dth iteration\n", __LINE__, c->name, i); | ||
goto out; | ||
} | ||
} | ||
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c->stop(c); | ||
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fprintf(stderr, "all lxc_container tests passed for %s\n", c->name); | ||
ret = EXIT_SUCCESS; | ||
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out: | ||
if (c) { | ||
c->stop(c); | ||
destroy_container(); | ||
} | ||
lxc_container_put(c); | ||
exit(ret); | ||
} |