src/tests/shortlived.c

   1 /* liblxcapi
   2  *
   3  * Copyright © 2017 Christian Brauner <christian.brauner@ubuntu.com>.
   4  * Copyright © 2017 Canonical Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19 #include <lxc/lxccontainer.h>
  20
  21 #include <unistd.h>
  22 #include <signal.h>
  23 #include <stdio.h>
  24 #include <sys/types.h>
  25 #include <sys/wait.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <errno.h>
  29 #include <fcntl.h>
  30
  31 #include "lxctest.h"
  32 #include "utils.h"
  33
  34 #ifndef HAVE_STRLCPY
  35 #include "include/strlcpy.h"
  36 #endif
  37
  38 #define MYNAME "shortlived"
  39
  40 static int destroy_container(void)
  41 {
  42         int status, ret;
  43         pid_t pid = fork();
  44
  45         if (pid < 0) {
  46                 perror("fork");
  47                 return -1;
  48         }
  49
  50         if (pid == 0) {
  51                 execlp("lxc-destroy", "lxc-destroy", "-f", "-n", MYNAME, NULL);
  52                 exit(EXIT_FAILURE);
  53         }
  54
  55 again:
  56         ret = waitpid(pid, &status, 0);
  57         if (ret == -1) {
  58                 if (errno == EINTR)
  59                         goto again;
  60                 perror("waitpid");
  61                 return -1;
  62         }
  63
  64         if (ret != pid)
  65                 goto again;
  66
  67         if (!WIFEXITED(status))  { // did not exit normally
  68                 fprintf(stderr, "%d: lxc-create exited abnormally\n", __LINE__);
  69                 return -1;
  70         }
  71
  72         return WEXITSTATUS(status);
  73 }
  74
  75 static int create_container(void)
  76 {
  77         int status, ret;
  78         pid_t pid = fork();
  79
  80         if (pid < 0) {
  81                 perror("fork");
  82                 return -1;
  83         }
  84
  85         if (pid == 0) {
  86                 execlp("lxc-create", "lxc-create", "-t", "busybox", "-n", MYNAME, NULL);
  87                 exit(EXIT_FAILURE);
  88         }
  89
  90 again:
  91         ret = waitpid(pid, &status, 0);
  92         if (ret == -1) {
  93                 if (errno == EINTR)
  94                         goto again;
  95
  96                 perror("waitpid");
  97                 return -1;
  98         }
  99
 100         if (ret != pid)
 101                 goto again;
 102
 103         if (!WIFEXITED(status))  { // did not exit normally
 104                 fprintf(stderr, "%d: lxc-create exited abnormally\n", __LINE__);
 105                 return -1;
 106         }
 107
 108         return WEXITSTATUS(status);
 109 }
 110
 111 int main(int argc, char *argv[])
 112 {
 113         int fd, i;
 114         const char *s;
 115         bool b;
 116         struct lxc_container *c;
 117         struct lxc_log log;
 118         char template[sizeof(P_tmpdir"/shortlived_XXXXXX")];
 119         int ret = EXIT_FAILURE;
 120
 121         (void)strlcpy(template, P_tmpdir"/shortlived_XXXXXX", sizeof(template));
 122
 123         i = lxc_make_tmpfile(template, false);
 124         if (i < 0) {
 125                 lxc_error("Failed to create temporary log file for container %s\n", MYNAME);
 126                 exit(EXIT_FAILURE);
 127         } else {
 128                 lxc_debug("Using \"%s\" as temporary log file for container %s\n", template, MYNAME);
 129                 close(i);
 130         }
 131
 132         log.name = MYNAME;
 133         log.file = template;
 134         log.level = "TRACE";
 135         log.prefix = "shortlived";
 136         log.quiet = false;
 137         log.lxcpath = NULL;
 138
 139         if (lxc_log_init(&log))
 140                 exit(EXIT_FAILURE);
 141
 142         /* test a real container */
 143         c = lxc_container_new(MYNAME, NULL);
 144         if (!c) {
 145                 fprintf(stderr, "%d: error creating lxc_container %s\n", __LINE__, MYNAME);
 146                 goto out;
 147         }
 148
 149         if (c->is_defined(c)) {
 150                 fprintf(stderr, "%d: %s thought it was defined\n", __LINE__, MYNAME);
 151                 goto out;
 152         }
 153
 154         if (create_container() < 0) {
 155                 fprintf(stderr, "%d: failed to create a container\n", __LINE__);
 156                 goto out;
 157         }
 158
 159         b = c->is_defined(c);
 160         if (!b) {
 161                 fprintf(stderr, "%d: %s thought it was not defined\n", __LINE__, MYNAME);
 162                 goto out;
 163         }
 164
 165         s = c->state(c);
 166         if (!s || strcmp(s, "STOPPED")) {
 167                 fprintf(stderr, "%d: %s is in state %s, not in STOPPED.\n", __LINE__, c->name, s ? s : "undefined");
 168                 goto out;
 169         }
 170
 171         b = c->load_config(c, NULL);
 172         if (!b) {
 173                 fprintf(stderr, "%d: %s failed to read its config\n", __LINE__, c->name);
 174                 goto out;
 175         }
 176
 177         if (!c->set_config_item(c, "lxc.init.cmd", "echo hello")) {
 178                 fprintf(stderr, "%d: failed setting lxc.init.cmd\n", __LINE__);
 179                 goto out;
 180         }
 181
 182         if (!c->set_config_item(c, "lxc.execute.cmd", "echo hello")) {
 183                 fprintf(stderr, "%d: failed setting lxc.execute.cmd\n", __LINE__);
 184                 goto out;
 185         }
 186
 187         c->want_daemonize(c, true);
 188
 189         /* Test whether we can start a really short-lived daemonized container. */
 190         for (i = 0; i < 10; i++) {
 191                 if (!c->startl(c, 0, NULL)) {
 192                         fprintf(stderr, "%d: %s failed to start on %dth iteration\n", __LINE__, c->name, i);
 193                         goto out;
 194                 }
 195
 196                 if (!c->wait(c, "STOPPED", 30)) {
 197                         fprintf(stderr, "%d: %s failed to wait on %dth iteration\n", __LINE__, c->name, i);
 198                         goto out;
 199                 }
 200         }
 201
 202         /* Test whether we can start a really short-lived daemonized container with lxc-init. */
 203         for (i = 0; i < 10; i++) {
 204                 if (!c->startl(c, 1, NULL)) {
 205                         fprintf(stderr, "%d: %s failed to start on %dth iteration\n", __LINE__, c->name, i);
 206                         goto out;
 207                 }
 208
 209                 if (!c->wait(c, "STOPPED", 30)) {
 210                         fprintf(stderr, "%d: %s failed to wait on %dth iteration\n", __LINE__, c->name, i);
 211                         goto out;
 212                 }
 213         }
 214
 215         if (!c->set_config_item(c, "lxc.init.cmd", "you-shall-fail")) {
 216                 fprintf(stderr, "%d: failed setting lxc.init.cmd\n", __LINE__);
 217                 goto out;
 218         }
 219
 220         if (!c->set_config_item(c, "lxc.execute.cmd", "you-shall-fail")) {
 221                 fprintf(stderr, "%d: failed setting lxc.init.cmd\n", __LINE__);
 222                 goto out;
 223         }
 224
 225         /* Test whether we can start a really short-lived daemonized container. */
 226         for (i = 0; i < 10; i++) {
 227                 if (c->startl(c, 0, NULL)) {
 228                         fprintf(stderr, "%d: %s failed to start on %dth iteration\n", __LINE__, c->name, i);
 229                         goto out;
 230                 }
 231
 232                 if (!c->wait(c, "STOPPED", 30)) {
 233                         fprintf(stderr, "%d: %s failed to wait on %dth iteration\n", __LINE__, c->name, i);
 234                         goto out;
 235                 }
 236         }
 237
 238         /* Test whether we can start a really short-lived daemonized container with lxc-init. */
 239         for (i = 0; i < 10; i++) {
 240                 /* An container started with lxc-init will always start
 241                  * successfully unless lxc-init has a bug.
 242                  */
 243                 if (!c->startl(c, 1, NULL)) {
 244                         fprintf(stderr, "%d: %s failed to start on %dth iteration\n", __LINE__, c->name, i);
 245                         goto out;
 246                 }
 247
 248                 if (!c->wait(c, "STOPPED", 30)) {
 249                         fprintf(stderr, "%d: %s failed to wait on %dth iteration\n", __LINE__, c->name, i);
 250                         goto out;
 251                 }
 252         }
 253
 254         c->stop(c);
 255
 256         fprintf(stderr, "all lxc_container tests passed for %s\n", c->name);
 257         ret = 0;
 258
 259 out:
 260         if (c) {
 261                 c->stop(c);
 262                 destroy_container();
 263         }
 264         lxc_container_put(c);
 265
 266         if (ret != 0) {
 267                 fd = open(template, O_RDONLY);
 268                 if (fd >= 0) {
 269                         char buf[4096];
 270                         ssize_t buflen;
 271
 272                         while ((buflen = read(fd, buf, 1024)) > 0) {
 273                                 buflen = write(STDERR_FILENO, buf, buflen);
 274                                 if (buflen <= 0)
 275                                         break;
 276                         }
 277
 278                         close(fd);
 279                 }
 280         }
 281
 282         unlink(template);
 283         exit(ret);
 284 }