src/tests/rootfs_options.c

   1 /* liblxcapi
   2  *
   3  * Copyright © 2021 Christian Brauner <christian.brauner@ubuntu.com>.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include "config.h"
  20
  21 #define __STDC_FORMAT_MACROS
  22
  23 #include <errno.h>
  24 #include <fcntl.h>
  25 #include <inttypes.h>
  26 #include <signal.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <sys/stat.h>
  32 #include <sys/types.h>
  33 #include <sys/wait.h>
  34
  35 #include "lxccontainer.h"
  36 #include "attach_options.h"
  37
  38 #ifdef HAVE_STATVFS
  39 #include <sys/statvfs.h>
  40 #endif
  41
  42 #include "lxctest.h"
  43 #include "utils.h"
  44
  45 static int has_mount_properties(const char *path, unsigned int flags)
  46 {
  47 #ifdef HAVE_STATVFS
  48         int ret;
  49         struct statvfs sb;
  50
  51         ret = statvfs(path, &sb);
  52         if (ret < 0)
  53                 return -errno;
  54
  55         if ((sb.f_flag & flags) == flags)
  56                 return 0;
  57
  58         return -EINVAL;
  59
  60 #else
  61         return -EOPNOTSUPP;
  62 #endif
  63 }
  64
  65 static int rootfs_options(void *payload)
  66 {
  67         int ret;
  68
  69         ret = has_mount_properties("/",
  70                                    MS_NODEV |
  71                                    MS_NOSUID |
  72                                    MS_RDONLY);
  73         if (ret != 0) {
  74                 if (ret == -EOPNOTSUPP)
  75                         return EXIT_SUCCESS;
  76
  77                 return EXIT_FAILURE;
  78         }
  79
  80         return EXIT_SUCCESS;
  81 }
  82
  83 int main(int argc, char *argv[])
  84 {
  85         int fret = EXIT_FAILURE;
  86         lxc_attach_options_t attach_options = LXC_ATTACH_OPTIONS_DEFAULT;
  87         int ret;
  88         pid_t pid;
  89         struct lxc_container *c;
  90
  91         c = lxc_container_new("rootfs-options", NULL);
  92         if (!c) {
  93                 lxc_error("%s", "Failed to create container \"rootfs-options\"");
  94                 exit(fret);
  95         }
  96
  97         if (c->is_defined(c)) {
  98                 lxc_error("%s\n", "Container \"rootfs-options\" is defined");
  99                 goto on_error_put;
 100         }
 101
 102         if (!c->createl(c, "busybox", NULL, NULL, 0, NULL)) {
 103                 lxc_error("%s\n", "Failed to create busybox container \"rootfs-options\"");
 104                 goto on_error_put;
 105         }
 106
 107         if (!c->is_defined(c)) {
 108                 lxc_error("%s\n", "Container \"rootfs-options\" is not defined");
 109                 goto on_error_put;
 110         }
 111
 112         c->clear_config(c);
 113
 114         if (!c->set_config_item(c, "lxc.rootfs.options", "nodev,nosuid,ro")) {
 115                 lxc_error("%s\n", "Failed to set config item \"lxc.mount.auto=sys:mixed\"");
 116                 goto on_error_put;
 117         }
 118
 119         if (!c->load_config(c, NULL)) {
 120                 lxc_error("%s\n", "Failed to load config for container \"rootfs-options\"");
 121                 goto on_error_stop;
 122         }
 123
 124         if (!c->want_daemonize(c, true)) {
 125                 lxc_error("%s\n", "Failed to mark container \"rootfs-options\" daemonized");
 126                 goto on_error_stop;
 127         }
 128
 129         if (!c->startl(c, 0, NULL)) {
 130                 lxc_error("%s\n", "Failed to start container \"rootfs-options\" daemonized");
 131                 goto on_error_stop;
 132         }
 133
 134         /* Leave some time for the container to write something to the log. */
 135         sleep(2);
 136
 137         ret = c->attach(c, rootfs_options, NULL, &attach_options, &pid);
 138         if (ret < 0) {
 139                 lxc_error("%s\n", "Failed to run function in container \"rootfs-options\"");
 140                 goto on_error_stop;
 141         }
 142
 143         ret = wait_for_pid(pid);
 144         if (ret < 0) {
 145                 lxc_error("%s\n", "Function \"rootfs-options\" failed");
 146                 goto on_error_stop;
 147         }
 148
 149         fret = 0;
 150
 151 on_error_stop:
 152         if (c->is_running(c) && !c->stop(c))
 153                 lxc_error("%s\n", "Failed to stop container \"rootfs-options\"");
 154
 155         if (!c->destroy(c))
 156                 lxc_error("%s\n", "Failed to destroy container \"rootfs-options\"");
 157
 158 on_error_put:
 159         lxc_container_put(c);
 160         exit(fret);
 161 }