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 #define MYNAME "shortlived"
  32
  33 static int destroy_container(void)
  34 {
  35         int status, ret;
  36         pid_t pid = fork();
  37
  38         if (pid < 0) {
  39                 perror("fork");
  40                 return -1;
  41         }
  42         if (pid == 0) {
  43                 execlp("lxc-destroy", "lxc-destroy", "-f", "-n", MYNAME, NULL);
  44                 exit(EXIT_FAILURE);
  45         }
  46 again:
  47         ret = waitpid(pid, &status, 0);
  48         if (ret == -1) {
  49                 if (errno == EINTR)
  50                         goto again;
  51                 perror("waitpid");
  52                 return -1;
  53         }
  54         if (ret != pid)
  55                 goto again;
  56         if (!WIFEXITED(status))  { // did not exit normally
  57                 fprintf(stderr, "%d: lxc-create exited abnormally\n", __LINE__);
  58                 return -1;
  59         }
  60         return WEXITSTATUS(status);
  61 }
  62
  63 static int create_container(void)
  64 {
  65         int status, ret;
  66         pid_t pid = fork();
  67
  68         if (pid < 0) {
  69                 perror("fork");
  70                 return -1;
  71         }
  72         if (pid == 0) {
  73                 execlp("lxc-create", "lxc-create", "-t", "busybox", "-n", MYNAME, NULL);
  74                 exit(EXIT_FAILURE);
  75         }
  76 again:
  77         ret = waitpid(pid, &status, 0);
  78         if (ret == -1) {
  79                 if (errno == EINTR)
  80                         goto again;
  81                 perror("waitpid");
  82                 return -1;
  83         }
  84         if (ret != pid)
  85                 goto again;
  86         if (!WIFEXITED(status))  { // did not exit normally
  87                 fprintf(stderr, "%d: lxc-create exited abnormally\n", __LINE__);
  88                 return -1;
  89         }
  90         return WEXITSTATUS(status);
  91 }
  92
  93 int main(int argc, char *argv[])
  94 {
  95         struct lxc_container *c;
  96         const char *s;
  97         bool b;
  98         int i;
  99         int ret = 0;
 100
 101         ret = 1;
 102         /* test a real container */
 103         c = lxc_container_new(MYNAME, NULL);
 104         if (!c) {
 105                 fprintf(stderr, "%d: error creating lxc_container %s\n", __LINE__, MYNAME);
 106                 ret = 1;
 107                 goto out;
 108         }
 109
 110         if (c->is_defined(c)) {
 111                 fprintf(stderr, "%d: %s thought it was defined\n", __LINE__, MYNAME);
 112                 goto out;
 113         }
 114
 115         ret = create_container();
 116         if (ret) {
 117                 fprintf(stderr, "%d: failed to create a container\n", __LINE__);
 118                 goto out;
 119         }
 120
 121         b = c->is_defined(c);
 122         if (!b) {
 123                 fprintf(stderr, "%d: %s thought it was not defined\n", __LINE__, MYNAME);
 124                 goto out;
 125         }
 126
 127         s = c->state(c);
 128         if (!s || strcmp(s, "STOPPED")) {
 129                 fprintf(stderr, "%d: %s is in state %s, not in STOPPED.\n", __LINE__, c->name, s ? s : "undefined");
 130                 goto out;
 131         }
 132
 133         b = c->load_config(c, NULL);
 134         if (!b) {
 135                 fprintf(stderr, "%d: %s failed to read its config\n", __LINE__, c->name);
 136                 goto out;
 137         }
 138
 139         if (!c->set_config_item(c, "lxc.init.cmd", "echo hello")) {
 140                 fprintf(stderr, "%d: failed setting lxc.init.cmd\n", __LINE__);
 141                 goto out;
 142         }
 143
 144         c->want_daemonize(c, true);
 145
 146         /* Test whether we can start a really short-lived daemonized container.
 147          */
 148         for (i = 0; i < 10; i++) {
 149                 if (!c->startl(c, 0, NULL)) {
 150                         fprintf(stderr, "%d: %s failed to start\n", __LINE__, c->name);
 151                         goto out;
 152                 }
 153                 sleep(1);
 154         }
 155
 156         if (!c->set_config_item(c, "lxc.init.cmd", "you-shall-fail")) {
 157                 fprintf(stderr, "%d: failed setting lxc.init.cmd\n", __LINE__);
 158                 goto out;
 159         }
 160
 161         /* Test whether we catch the start failure of a really short-lived
 162          * daemonized container.
 163          */
 164         for (i = 0; i < 10; i++) {
 165                 if (c->startl(c, 0, NULL)) {
 166                         fprintf(stderr, "%d: %s failed to start\n", __LINE__, c->name);
 167                         goto out;
 168                 }
 169                 sleep(1);
 170         }
 171
 172         c->stop(c);
 173
 174         fprintf(stderr, "all lxc_container tests passed for %s\n", c->name);
 175         ret = 0;
 176
 177 out:
 178         if (c) {
 179                 c->stop(c);
 180                 destroy_container();
 181         }
 182         lxc_container_put(c);
 183         exit(ret);
 184 }