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 #define MYNAME "shortlived"
  35
  36 static int destroy_container(void)
  37 {
  38         int status, ret;
  39         pid_t pid = fork();
  40
  41         if (pid < 0) {
  42                 perror("fork");
  43                 return -1;
  44         }
  45         if (pid == 0) {
  46                 execlp("lxc-destroy", "lxc-destroy", "-f", "-n", MYNAME, NULL);
  47                 exit(EXIT_FAILURE);
  48         }
  49 again:
  50         ret = waitpid(pid, &status, 0);
  51         if (ret == -1) {
  52                 if (errno == EINTR)
  53                         goto again;
  54                 perror("waitpid");
  55                 return -1;
  56         }
  57         if (ret != pid)
  58                 goto again;
  59         if (!WIFEXITED(status))  { // did not exit normally
  60                 fprintf(stderr, "%d: lxc-create exited abnormally\n", __LINE__);
  61                 return -1;
  62         }
  63         return WEXITSTATUS(status);
  64 }
  65
  66 static int create_container(void)
  67 {
  68         int status, ret;
  69         pid_t pid = fork();
  70
  71         if (pid < 0) {
  72                 perror("fork");
  73                 return -1;
  74         }
  75         if (pid == 0) {
  76                 execlp("lxc-create", "lxc-create", "-t", "busybox", "-n", MYNAME, NULL);
  77                 exit(EXIT_FAILURE);
  78         }
  79 again:
  80         ret = waitpid(pid, &status, 0);
  81         if (ret == -1) {
  82                 if (errno == EINTR)
  83                         goto again;
  84                 perror("waitpid");
  85                 return -1;
  86         }
  87         if (ret != pid)
  88                 goto again;
  89         if (!WIFEXITED(status))  { // did not exit normally
  90                 fprintf(stderr, "%d: lxc-create exited abnormally\n", __LINE__);
  91                 return -1;
  92         }
  93         return WEXITSTATUS(status);
  94 }
  95
  96 int main(int argc, char *argv[])
  97 {
  98         int i;
  99         const char *s;
 100         bool b;
 101         struct lxc_container *c;
 102         struct lxc_log log;
 103         char template[sizeof(P_tmpdir"/shortlived_XXXXXX")];
 104         int ret = 0;
 105
 106         strcpy(template, P_tmpdir"/shortlived_XXXXXX");
 107         i = lxc_make_tmpfile(template, false);
 108         if (i < 0) {
 109                 lxc_error("Failed to create temporary log file for container %s\n", MYNAME);
 110                 exit(EXIT_FAILURE);
 111         } else {
 112                 lxc_debug("Using \"%s\" as temporary log file for container %s\n", template, MYNAME);
 113                 close(i);
 114         }
 115
 116         log.name = MYNAME;
 117         log.file = template;
 118         log.level = "TRACE";
 119         log.prefix = "shortlived";
 120         log.quiet = false;
 121         log.lxcpath = NULL;
 122         if (lxc_log_init(&log))
 123                 exit(EXIT_FAILURE);
 124
 125         ret = 1;
 126         /* test a real container */
 127         c = lxc_container_new(MYNAME, NULL);
 128         if (!c) {
 129                 fprintf(stderr, "%d: error creating lxc_container %s\n", __LINE__, MYNAME);
 130                 ret = 1;
 131                 goto out;
 132         }
 133
 134         if (c->is_defined(c)) {
 135                 fprintf(stderr, "%d: %s thought it was defined\n", __LINE__, MYNAME);
 136                 goto out;
 137         }
 138
 139         ret = create_container();
 140         if (ret) {
 141                 fprintf(stderr, "%d: failed to create a container\n", __LINE__);
 142                 goto out;
 143         }
 144
 145         b = c->is_defined(c);
 146         if (!b) {
 147                 fprintf(stderr, "%d: %s thought it was not defined\n", __LINE__, MYNAME);
 148                 goto out;
 149         }
 150
 151         s = c->state(c);
 152         if (!s || strcmp(s, "STOPPED")) {
 153                 fprintf(stderr, "%d: %s is in state %s, not in STOPPED.\n", __LINE__, c->name, s ? s : "undefined");
 154                 goto out;
 155         }
 156
 157         b = c->load_config(c, NULL);
 158         if (!b) {
 159                 fprintf(stderr, "%d: %s failed to read its config\n", __LINE__, c->name);
 160                 goto out;
 161         }
 162
 163         if (!c->set_config_item(c, "lxc.init.cmd", "echo hello")) {
 164                 fprintf(stderr, "%d: failed setting lxc.init.cmd\n", __LINE__);
 165                 goto out;
 166         }
 167
 168         if (!c->set_config_item(c, "lxc.execute.cmd", "echo hello")) {
 169                 fprintf(stderr, "%d: failed setting lxc.init.cmd\n", __LINE__);
 170                 goto out;
 171         }
 172
 173         c->want_daemonize(c, true);
 174
 175         /* Test whether we can start a really short-lived daemonized container. */
 176         for (i = 0; i < 10; i++) {
 177                 if (!c->startl(c, 0, NULL)) {
 178                         fprintf(stderr, "%d: %s failed to start on %dth iteration\n", __LINE__, c->name, i);
 179                         goto out;
 180                 }
 181
 182                 /* The container needs to exit with a successful error code. */
 183                 if (c->error_num != 0) {
 184                         fprintf(stderr, "%d: %s exited successfully on %dth iteration\n", __LINE__, c->name, i);
 185                         goto out;
 186                 }
 187                 fprintf(stderr, "%d: %s exited correctly with error code %d on %dth iteration\n", __LINE__, c->name, c->error_num, i);
 188
 189                 if (!c->wait(c, "STOPPED", 30)) {
 190                         fprintf(stderr, "%d: %s failed to wait on %dth iteration\n", __LINE__, c->name, i);
 191                         goto out;
 192                 }
 193         }
 194
 195         /* Test whether we can start a really short-lived daemonized container with lxc-init. */
 196         for (i = 0; i < 10; i++) {
 197                 if (!c->startl(c, 1, NULL)) {
 198                         fprintf(stderr, "%d: %s failed to start on %dth iteration\n", __LINE__, c->name, i);
 199                         goto out;
 200                 }
 201
 202                 /* The container needs to exit with a successful error code. */
 203                 if (c->error_num != 0) {
 204                         fprintf(stderr, "%d: %s exited successfully on %dth iteration\n", __LINE__, c->name, i);
 205                         goto out;
 206                 }
 207                 fprintf(stderr, "%d: %s exited correctly with error code %d on %dth iteration\n", __LINE__, c->name, c->error_num, i);
 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                 /* The container needs to exit with an error code.*/
 233                 if (c->error_num == 0) {
 234                         fprintf(stderr, "%d: %s exited successfully on %dth iteration\n", __LINE__, c->name, i);
 235                         goto out;
 236                 }
 237                 fprintf(stderr, "%d: %s exited correctly with error code %d on %dth iteration\n", __LINE__, c->name, c->error_num, i);
 238
 239                 if (!c->wait(c, "STOPPED", 30)) {
 240                         fprintf(stderr, "%d: %s failed to wait on %dth iteration\n", __LINE__, c->name, i);
 241                         goto out;
 242                 }
 243         }
 244
 245         /* Test whether we can start a really short-lived daemonized container with lxc-init. */
 246         for (i = 0; i < 10; i++) {
 247                 /* An container started with lxc-init will always start
 248                  * succesfully unless lxc-init has a bug.
 249                  */
 250                 if (!c->startl(c, 1, NULL)) {
 251                         fprintf(stderr, "%d: %s failed to start on %dth iteration\n", __LINE__, c->name, i);
 252                         goto out;
 253                 }
 254
 255                 /* The container needs to exit with an error code.*/
 256                 if (c->error_num == 0) {
 257                         fprintf(stderr, "%d: %s exited successfully on %dth iteration\n", __LINE__, c->name, i);
 258                         goto out;
 259                 }
 260                 fprintf(stderr, "%d: %s exited correctly with error code %d on %dth iteration\n", __LINE__, c->name, c->error_num, i);
 261
 262                 if (!c->wait(c, "STOPPED", 30)) {
 263                         fprintf(stderr, "%d: %s failed to wait on %dth iteration\n", __LINE__, c->name, i);
 264                         goto out;
 265                 }
 266         }
 267
 268         c->stop(c);
 269
 270         fprintf(stderr, "all lxc_container tests passed for %s\n", c->name);
 271         ret = 0;
 272
 273 out:
 274         if (c) {
 275                 c->stop(c);
 276                 destroy_container();
 277         }
 278         lxc_container_put(c);
 279         unlink(template);
 280         exit(ret);
 281 }