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                 ret = execlp("lxc-destroy", "lxc-destroy", "-f", "-n", MYNAME, NULL);
  44                 // Should not return
  45                 perror("execl");
  46                 exit(1);
  47         }
  48 again:
  49         ret = waitpid(pid, &status, 0);
  50         if (ret == -1) {
  51                 if (errno == EINTR)
  52                         goto again;
  53                 perror("waitpid");
  54                 return -1;
  55         }
  56         if (ret != pid)
  57                 goto again;
  58         if (!WIFEXITED(status))  { // did not exit normally
  59                 fprintf(stderr, "%d: lxc-create exited abnormally\n", __LINE__);
  60                 return -1;
  61         }
  62         return WEXITSTATUS(status);
  63 }
  64
  65 static int create_container(void)
  66 {
  67         int status, ret;
  68         pid_t pid = fork();
  69
  70         if (pid < 0) {
  71                 perror("fork");
  72                 return -1;
  73         }
  74         if (pid == 0) {
  75                 ret = execlp("lxc-create", "lxc-create", "-t", "busybox", "-n", MYNAME, NULL);
  76                 // Should not return
  77                 perror("execl");
  78                 exit(1);
  79         }
  80 again:
  81         ret = waitpid(pid, &status, 0);
  82         if (ret == -1) {
  83                 if (errno == EINTR)
  84                         goto again;
  85                 perror("waitpid");
  86                 return -1;
  87         }
  88         if (ret != pid)
  89                 goto again;
  90         if (!WIFEXITED(status))  { // did not exit normally
  91                 fprintf(stderr, "%d: lxc-create exited abnormally\n", __LINE__);
  92                 return -1;
  93         }
  94         return WEXITSTATUS(status);
  95 }
  96
  97 int main(int argc, char *argv[])
  98 {
  99         struct lxc_container *c;
 100         const char *s;
 101         bool b;
 102         int i;
 103         int ret = 0;
 104
 105         ret = 1;
 106         /* test a real container */
 107         c = lxc_container_new(MYNAME, NULL);
 108         if (!c) {
 109                 fprintf(stderr, "%d: error creating lxc_container %s\n", __LINE__, MYNAME);
 110                 ret = 1;
 111                 goto out;
 112         }
 113
 114         if (c->is_defined(c)) {
 115                 fprintf(stderr, "%d: %s thought it was defined\n", __LINE__, MYNAME);
 116                 goto out;
 117         }
 118
 119         ret = create_container();
 120         if (ret) {
 121                 fprintf(stderr, "%d: failed to create a container\n", __LINE__);
 122                 goto out;
 123         }
 124
 125         b = c->is_defined(c);
 126         if (!b) {
 127                 fprintf(stderr, "%d: %s thought it was not defined\n", __LINE__, MYNAME);
 128                 goto out;
 129         }
 130
 131         s = c->state(c);
 132         if (!s || strcmp(s, "STOPPED")) {
 133                 fprintf(stderr, "%d: %s is in state %s, not in STOPPED.\n", __LINE__, c->name, s ? s : "undefined");
 134                 goto out;
 135         }
 136
 137         b = c->load_config(c, NULL);
 138         if (!b) {
 139                 fprintf(stderr, "%d: %s failed to read its config\n", __LINE__, c->name);
 140                 goto out;
 141         }
 142
 143         if (!c->set_config_item(c, "lxc.init.cmd", "echo hello")) {
 144                 fprintf(stderr, "%d: failed setting lxc.init.cmd\n", __LINE__);
 145                 goto out;
 146         }
 147
 148         c->want_daemonize(c, true);
 149
 150         /* Test whether we can start a really short-lived daemonized container.
 151          */
 152         for (i = 0; i < 10; i++) {
 153                 if (!c->startl(c, 0, NULL)) {
 154                         fprintf(stderr, "%d: %s failed to start\n", __LINE__, c->name);
 155                         goto out;
 156                 }
 157                 sleep(1);
 158         }
 159
 160         if (!c->set_config_item(c, "lxc.init.cmd", "you-shall-fail")) {
 161                 fprintf(stderr, "%d: failed setting lxc.init.cmd\n", __LINE__);
 162                 goto out;
 163         }
 164
 165         /* Test whether we catch the start failure of a really short-lived
 166          * daemonized container.
 167          */
 168         for (i = 0; i < 10; i++) {
 169                 if (c->startl(c, 0, NULL)) {
 170                         fprintf(stderr, "%d: %s failed to start\n", __LINE__, c->name);
 171                         goto out;
 172                 }
 173                 sleep(1);
 174         }
 175
 176         c->stop(c);
 177
 178         fprintf(stderr, "all lxc_container tests passed for %s\n", c->name);
 179         ret = 0;
 180
 181 out:
 182         if (c) {
 183                 c->stop(c);
 184                 destroy_container();
 185         }
 186         lxc_container_put(c);
 187         exit(ret);
 188 }