src/tests/containertests.c

   1 /* liblxcapi
   2  *
   3  * Copyright © 2012 Serge Hallyn <serge.hallyn@ubuntu.com>.
   4  * Copyright © 2012 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 <errno.h>
  28 #include <string.h>
  29 #include "lxc/state.h"
  30
  31 #define MYNAME "lxctest1"
  32
  33 static int destroy_busybox(void)
  34 {
  35         int status, ret;
  36         pid_t pid = fork();
  37
  38         if (pid < 0) {
  39                 perror("fork");
  40                 return -1;
  41         }
  42
  43         if (pid == 0) {
  44                 execlp("lxc-destroy", "lxc-destroy", "-f", "-n", MYNAME, NULL);
  45                 exit(EXIT_FAILURE);
  46         }
  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
  57         if (ret != pid)
  58                 goto again;
  59
  60         if (!WIFEXITED(status))  { // did not exit normally
  61                 fprintf(stderr, "%d: lxc-create exited abnormally\n", __LINE__);
  62                 return -1;
  63         }
  64
  65         return WEXITSTATUS(status);
  66 }
  67
  68 static int create_busybox(void)
  69 {
  70         int status, ret;
  71         pid_t pid = fork();
  72
  73         if (pid < 0) {
  74                 perror("fork");
  75                 return -1;
  76         }
  77
  78         if (pid == 0) {
  79                 execlp("lxc-create", "lxc-create", "-t", "busybox", "-n", MYNAME, NULL);
  80                 exit(EXIT_FAILURE);
  81         }
  82
  83 again:
  84         ret = waitpid(pid, &status, 0);
  85         if (ret == -1) {
  86                 if (errno == EINTR)
  87                         goto again;
  88                 perror("waitpid");
  89                 return -1;
  90         }
  91
  92         if (ret != pid)
  93                 goto again;
  94
  95         if (!WIFEXITED(status))  { // did not exit normally
  96                 fprintf(stderr, "%d: lxc-create exited abnormally\n", __LINE__);
  97                 return -1;
  98         }
  99
 100         return WEXITSTATUS(status);
 101 }
 102
 103 int main(int argc, char *argv[])
 104 {
 105         struct lxc_container *c;
 106         int ret = 0;
 107         const char *s;
 108         bool b;
 109         char *str;
 110
 111         ret = 1;
 112
 113         /* test refcounting */
 114         c = lxc_container_new(MYNAME, NULL);
 115         if (!c) {
 116                 fprintf(stderr, "%d: error creating lxc_container %s\n", __LINE__, MYNAME);
 117                 goto out;
 118         }
 119
 120         if (!lxc_container_get(c)) {
 121                 fprintf(stderr, "%d: error getting refcount\n", __LINE__);
 122                 goto out;
 123         }
 124
 125         /* peek in, inappropriately, make sure refcount is a we'd like */
 126         if (c->numthreads != 2) {
 127                 fprintf(stderr, "%d: refcount is %d, not %d\n", __LINE__, c->numthreads, 2);
 128                 goto out;
 129         }
 130
 131         if (strcmp(c->name, MYNAME) != 0) {
 132                 fprintf(stderr, "%d: container has wrong name (%s not %s)\n", __LINE__, c->name, MYNAME);
 133                 goto out;
 134         }
 135
 136         str = c->config_file_name(c);
 137 #define CONFIGFNAM LXCPATH "/" MYNAME "/config"
 138         if (str && strcmp(str, CONFIGFNAM)) {
 139                 fprintf(stderr, "%d: got wrong config file name (%s, not %s)\n", __LINE__, str, CONFIGFNAM);
 140                 goto out;
 141         }
 142         free(str);
 143         free(c->configfile);
 144         c->configfile = NULL;
 145
 146         str = c->config_file_name(c);
 147         if (str) {
 148                 fprintf(stderr, "%d: config file name was not NULL as it should have been\n", __LINE__);
 149                 goto out;
 150         }
 151
 152         ret = lxc_container_put(c);
 153         if (ret < 0) {
 154                 fprintf(stderr, "%d: c is invalid pointer\n", __LINE__);
 155                 ret = 1;
 156                 goto out;
 157         }
 158         else if (ret == 1) {
 159                 fprintf(stderr, "%d: c was freed on non-final put\n", __LINE__);
 160                 c = NULL;
 161                 goto out;
 162         }
 163
 164         if (c->numthreads != 1) {
 165                 fprintf(stderr, "%d: refcount is %d, not %d\n", __LINE__, c->numthreads, 1);
 166                 goto out;
 167         }
 168
 169         if (lxc_container_put(c) != 1) {
 170                 fprintf(stderr, "%d: c was not freed on final put\n", __LINE__);
 171                 goto out;
 172         }
 173
 174         /* test a real container */
 175         c = lxc_container_new(MYNAME, NULL);
 176         if (!c) {
 177                 fprintf(stderr, "%d: error creating lxc_container %s\n", __LINE__, MYNAME);
 178                 ret = 1;
 179                 goto out;
 180         }
 181
 182         b = c->is_defined(c);
 183         if (b) {
 184                 fprintf(stderr, "%d: %s thought it was defined\n", __LINE__, MYNAME);
 185                 goto out;
 186         }
 187
 188         s = c->state(c);
 189         if (s && strcmp(s, "STOPPED") != 0) {
 190         // liblxc says a container is STOPPED if it doesn't exist.  That's because
 191         // the container may be an application container - it's not wrong, just
 192         // sometimes unintuitive.
 193                 fprintf(stderr, "%d: %s thinks it is in state %s\n", __LINE__, c->name, s);
 194                 goto out;
 195         }
 196
 197         // create a container
 198         // the liblxc api does not support creation - it probably will eventually,
 199         // but not yet.
 200         // So we just call out to lxc-create.  We'll create a busybox container.
 201         ret = create_busybox();
 202         if (ret) {
 203                 fprintf(stderr, "%d: failed to create a busybox container\n", __LINE__);
 204                 goto out;
 205         }
 206
 207         b = c->is_defined(c);
 208         if (!b) {
 209                 fprintf(stderr, "%d: %s thought it was not defined\n", __LINE__, MYNAME);
 210                 goto out;
 211         }
 212
 213         s = c->state(c);
 214         if (!s || strcmp(s, "STOPPED")) {
 215                 fprintf(stderr, "%d: %s is in state %s, not in STOPPED.\n", __LINE__, c->name, s ? s : "undefined");
 216                 goto out;
 217         }
 218
 219         b = c->load_config(c, NULL);
 220         if (!b) {
 221                 fprintf(stderr, "%d: %s failed to read its config\n", __LINE__, c->name);
 222                 goto out;
 223         }
 224
 225         // test wait states
 226         int numstates = lxc_get_wait_states(NULL);
 227         if (numstates != MAX_STATE) {
 228                 fprintf(stderr, "%d: lxc_get_wait_states gave %d not %d\n", __LINE__, numstates, MAX_STATE);
 229                 goto out;
 230         }
 231
 232         const char **sstr = malloc(numstates * sizeof(const char *));
 233         numstates = lxc_get_wait_states(sstr);
 234         int i;
 235
 236         for (i=0; i<numstates; i++) {
 237                 fprintf(stderr, "got state %d %s\n", i, sstr[i]);
 238         }
 239         free(sstr);
 240
 241         /* non-daemonized is tested in 'startone' */
 242         c->want_daemonize(c, true);
 243         if (!c->startl(c, 0, NULL, NULL)) {
 244                 fprintf(stderr, "%d: %s failed to start daemonized\n", __LINE__, c->name);
 245                 goto out;
 246         }
 247
 248         if (!c->wait(c, "RUNNING", -1)) {
 249                 fprintf(stderr, "%d: failed waiting for state RUNNING\n", __LINE__);
 250                 goto out;
 251         }
 252
 253         sleep(3);
 254         s = c->state(c);
 255         if (!s || strcmp(s, "RUNNING")) {
 256                 fprintf(stderr, "%d: %s is in state %s, not in RUNNING.\n", __LINE__, c->name, s ? s : "undefined");
 257                 goto out;
 258         }
 259
 260         fprintf(stderr, "all lxc_container tests passed for %s\n", c->name);
 261         ret = 0;
 262
 263 out:
 264         if (c) {
 265                 c->stop(c);
 266                 destroy_busybox();
 267                 lxc_container_put(c);
 268         }
 269
 270         exit(ret);
 271 }