src/tests/saveconfig.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
  29 #define MYNAME "lxctest1"
  30
  31 static int create_container(void)
  32 {
  33         int status, ret;
  34         pid_t pid = fork();
  35
  36         if (pid < 0) {
  37                 perror("fork");
  38                 return -1;
  39         }
  40
  41         if (pid == 0) {
  42                 execlp("lxc-create", "lxc-create", "-t", "busybox", "-n", MYNAME, NULL);
  43                 exit(EXIT_FAILURE);
  44         }
  45
  46 again:
  47         ret = waitpid(pid, &status, 0);
  48         if (ret == -1) {
  49                 if (errno == EINTR)
  50                         goto again;
  51
  52                 perror("waitpid");
  53                 return -1;
  54         }
  55
  56         if (ret != pid)
  57                 goto again;
  58
  59         if (!WIFEXITED(status))  { // did not exit normally
  60                 fprintf(stderr, "%d: lxc-create exited abnormally\n", __LINE__);
  61                 return -1;
  62         }
  63
  64         return WEXITSTATUS(status);
  65 }
  66
  67 int main(int argc, char *argv[])
  68 {
  69         struct lxc_container *c;
  70         int ret = 1;
  71
  72         if ((c = lxc_container_new(MYNAME, NULL)) == NULL) {
  73                 fprintf(stderr, "%d: error opening lxc_container %s\n", __LINE__, MYNAME);
  74                 ret = 1;
  75                 goto out;
  76         }
  77
  78         if (c->is_defined(c)) {
  79                 fprintf(stderr, "%d: %s thought it was defined\n", __LINE__, MYNAME);
  80                 goto out;
  81         }
  82
  83         if (create_container()) {
  84                 fprintf(stderr, "%d: failed to create a container\n", __LINE__);
  85                 goto out;
  86         }
  87
  88         if (!c->is_defined(c)) {
  89                 fprintf(stderr, "%d: %s thought it was not defined\n", __LINE__, MYNAME);
  90                 goto out;
  91         }
  92
  93         c->load_config(c, NULL);
  94         unlink("/tmp/lxctest1");
  95         if (!c->save_config(c, "/tmp/lxctest1")) {
  96                 fprintf(stderr, "%d: failed writing config file /tmp/lxctest1\n", __LINE__);
  97                 goto out;
  98         }
  99
 100         rename(LXCPATH "/" MYNAME "/config", LXCPATH "/" MYNAME "/config.bak");
 101         if (!c->save_config(c, NULL)) {
 102                 fprintf(stderr, "%d: failed writing config file\n", __LINE__);
 103                 goto out;
 104         }
 105
 106         if (!c->destroy(c)) {
 107                 fprintf(stderr, "%d: error deleting %s\n", __LINE__, MYNAME);
 108                 goto out;
 109         }
 110
 111         if (c->is_defined(c)) {
 112                 fprintf(stderr, "%d: %s thought it was defined\n", __LINE__, MYNAME);
 113                 goto out;
 114         }
 115
 116         fprintf(stderr, "all lxc_container tests passed for %s\n", c->name);
 117         ret = 0;
 118
 119 out:
 120         lxc_container_put(c);
 121         exit(ret);
 122 }